## GtkWidget

GtkWidget — Base class for all widgets

## Synopsis

    #include <gtk/gtk.h>

    struct      GtkWidget;
    struct      GtkWidgetClass;
    enum        GtkWidgetFlags;
    #define     GTK_WIDGET_TYPE                 (wid)
    #define     GTK_WIDGET_STATE                (wid)
    #define     GTK_WIDGET_SAVED_STATE          (wid)
    #define     GTK_WIDGET_FLAGS                (wid)
    #define     GTK_WIDGET_TOPLEVEL             (wid)
    #define     GTK_WIDGET_NO_WINDOW            (wid)
    #define     GTK_WIDGET_REALIZED             (wid)
    #define     GTK_WIDGET_MAPPED               (wid)
    #define     GTK_WIDGET_VISIBLE              (wid)
    #define     GTK_WIDGET_DRAWABLE             (wid)
    #define     GTK_WIDGET_SENSITIVE            (wid)
    #define     GTK_WIDGET_PARENT_SENSITIVE     (wid)
    #define     GTK_WIDGET_IS_SENSITIVE         (wid)
    #define     GTK_WIDGET_CAN_FOCUS            (wid)
    #define     GTK_WIDGET_HAS_FOCUS            (wid)
    #define     GTK_WIDGET_CAN_DEFAULT          (wid)
    #define     GTK_WIDGET_RECEIVES_DEFAULT     (wid)
    #define     GTK_WIDGET_HAS_DEFAULT          (wid)
    #define     GTK_WIDGET_HAS_GRAB             (wid)
    #define     GTK_WIDGET_RC_STYLE             (wid)
    #define     GTK_WIDGET_COMPOSITE_CHILD      (wid)
    #define     GTK_WIDGET_APP_PAINTABLE        (wid)
    #define     GTK_WIDGET_DOUBLE_BUFFERED      (wid)
    #define     GTK_WIDGET_SET_FLAGS            (wid,flag)
    #define     GTK_WIDGET_UNSET_FLAGS          (wid,flag)
    void        (*GtkCallback)                  (GtkWidget *widget,
                                                 gpointer data);
    struct      GtkRequisition;
    struct      GtkAllocation;
    struct      GtkSelectionData;
    struct      GtkWidgetAuxInfo;
    struct      GtkWidgetShapeInfo;
    enum        GtkWidgetHelpType;
    GtkWidget*  gtk_widget_new                  (GType type,
                                                 const gchar *first_property_name,
                                                 ...);
    GtkWidget*  gtk_widget_ref                  (GtkWidget *widget);
    void        gtk_widget_unref                (GtkWidget *widget);
    void        gtk_widget_destroy              (GtkWidget *widget);
    void        gtk_widget_destroyed            (GtkWidget *widget,
                                                 GtkWidget **widget_pointer);
    void        gtk_widget_set                  (GtkWidget *widget,
                                                 const gchar *first_property_name,
                                                 ...);
    void        gtk_widget_unparent             (GtkWidget *widget);
    void        gtk_widget_show                 (GtkWidget *widget);
    void        gtk_widget_show_now             (GtkWidget *widget);
    void        gtk_widget_hide                 (GtkWidget *widget);
    void        gtk_widget_show_all             (GtkWidget *widget);
    void        gtk_widget_hide_all             (GtkWidget *widget);
    void        gtk_widget_map                  (GtkWidget *widget);
    void        gtk_widget_unmap                (GtkWidget *widget);
    void        gtk_widget_realize              (GtkWidget *widget);
    void        gtk_widget_unrealize            (GtkWidget *widget);
    void        gtk_widget_queue_draw           (GtkWidget *widget);
    void        gtk_widget_queue_resize         (GtkWidget *widget);
    void        gtk_widget_draw                 (GtkWidget *widget,
                                                 GdkRectangle *area);
    void        gtk_widget_size_request         (GtkWidget *widget,
                                                 GtkRequisition *requisition);
    void        gtk_widget_get_child_requisition
                                                (GtkWidget *widget,
                                                 GtkRequisition *requisition);
    void        gtk_widget_size_allocate        (GtkWidget *widget,
                                                 GtkAllocation *allocation);
    void        gtk_widget_add_accelerator      (GtkWidget *widget,
                                                 const gchar *accel_signal,
                                                 GtkAccelGroup *accel_group,
                                                 guint accel_key,
                                                 GdkModifierType accel_mods,
                                                 GtkAccelFlags accel_flags);
    gboolean    gtk_widget_remove_accelerator   (GtkWidget *widget,
                                                 GtkAccelGroup *accel_group,
                                                 guint accel_key,
                                                 GdkModifierType accel_mods);
    void        gtk_widget_set_accel_path       (GtkWidget *widget,
                                                 const gchar *accel_path,
                                                 GtkAccelGroup *accel_group);
    GList*      gtk_widget_list_accel_closures  (GtkWidget *widget);
    gboolean    gtk_widget_event                (GtkWidget *widget,
                                                 GdkEvent *event);
    gboolean    gtk_widget_activate             (GtkWidget *widget);
    void        gtk_widget_reparent             (GtkWidget *widget,
                                                 GtkWidget *new_parent);
    gboolean    gtk_widget_intersect            (GtkWidget *widget,
                                                 GdkRectangle *area,
                                                 GdkRectangle *intersection);
    gboolean    gtk_widget_is_focus             (GtkWidget *widget);
    void        gtk_widget_grab_focus           (GtkWidget *widget);
    void        gtk_widget_grab_default         (GtkWidget *widget);
    void        gtk_widget_set_name             (GtkWidget *widget,
                                                 const gchar *name);
    G_CONST_RETURN gchar* gtk_widget_get_name   (GtkWidget *widget);
    void        gtk_widget_set_state            (GtkWidget *widget,
                                                 GtkStateType state);
    void        gtk_widget_set_sensitive        (GtkWidget *widget,
                                                 gboolean sensitive);
    void        gtk_widget_set_parent           (GtkWidget *widget,
                                                 GtkWidget *parent);
    void        gtk_widget_set_parent_window    (GtkWidget *widget,
                                                 GdkWindow *parent_window);
    GdkWindow*  gtk_widget_get_parent_window    (GtkWidget *widget);
    void        gtk_widget_set_uposition        (GtkWidget *widget,
                                                 gint x,
                                                 gint y);
    void        gtk_widget_set_usize            (GtkWidget *widget,
                                                 gint width,
                                                 gint height);
    void        gtk_widget_set_events           (GtkWidget *widget,
                                                 gint events);
    void        gtk_widget_add_events           (GtkWidget *widget,
                                                 gint events);
    void        gtk_widget_set_extension_events (GtkWidget *widget,
                                                 GdkExtensionMode mode);
    GdkExtensionMode gtk_widget_get_extension_events
                                                (GtkWidget *widget);
    GtkWidget*  gtk_widget_get_toplevel         (GtkWidget *widget);
    GtkWidget*  gtk_widget_get_ancestor         (GtkWidget *widget,
                                                 GType widget_type);
    GdkColormap* gtk_widget_get_colormap        (GtkWidget *widget);
    void        gtk_widget_set_colormap         (GtkWidget *widget,
                                                 GdkColormap *colormap);
    GdkVisual*  gtk_widget_get_visual           (GtkWidget *widget);
    gint        gtk_widget_get_events           (GtkWidget *widget);
    void        gtk_widget_get_pointer          (GtkWidget *widget,
                                                 gint *x,
                                                 gint *y);
    gboolean    gtk_widget_is_ancestor          (GtkWidget *widget,
                                                 GtkWidget *ancestor);
    gboolean    gtk_widget_translate_coordinates
                                                (GtkWidget *src_widget,
                                                 GtkWidget *dest_widget,
                                                 gint src_x,
                                                 gint src_y,
                                                 gint *dest_x,
                                                 gint *dest_y);
    gboolean    gtk_widget_hide_on_delete       (GtkWidget *widget);
    void        gtk_widget_set_style            (GtkWidget *widget,
                                                 GtkStyle *style);
    #define     gtk_widget_set_rc_style         (widget)
    void        gtk_widget_ensure_style         (GtkWidget *widget);
    GtkStyle*   gtk_widget_get_style            (GtkWidget *widget);
    #define     gtk_widget_restore_default_style(widget)
    void        gtk_widget_reset_rc_styles      (GtkWidget *widget);
    void        gtk_widget_push_colormap        (GdkColormap *cmap);
    void        gtk_widget_pop_colormap         (void);
    void        gtk_widget_set_default_colormap (GdkColormap *colormap);
    GtkStyle*   gtk_widget_get_default_style    (void);
    GdkColormap* gtk_widget_get_default_colormap
                                                (void);
    GdkVisual*  gtk_widget_get_default_visual   (void);
    void        gtk_widget_set_direction        (GtkWidget *widget,
                                                 GtkTextDirection dir);
    enum        GtkTextDirection;
    GtkTextDirection gtk_widget_get_direction   (GtkWidget *widget);
    void        gtk_widget_set_default_direction
                                                (GtkTextDirection dir);
    GtkTextDirection gtk_widget_get_default_direction
                                                (void);
    void        gtk_widget_shape_combine_mask   (GtkWidget *widget,
                                                 GdkBitmap *shape_mask,
                                                 gint offset_x,
                                                 gint offset_y);
    void        gtk_widget_path                 (GtkWidget *widget,
                                                 guint *path_length,
                                                 gchar **path,
                                                 gchar **path_reversed);
    void        gtk_widget_class_path           (GtkWidget *widget,
                                                 guint *path_length,
                                                 gchar **path,
                                                 gchar **path_reversed);
    gchar*      gtk_widget_get_composite_name   (GtkWidget *widget);
    void        gtk_widget_modify_style         (GtkWidget *widget,
                                                 GtkRcStyle *style);
    GtkRcStyle* gtk_widget_get_modifier_style   (GtkWidget *widget);
    void        gtk_widget_modify_fg            (GtkWidget *widget,
                                                 GtkStateType state,
                                                 GdkColor *color);
    void        gtk_widget_modify_bg            (GtkWidget *widget,
                                                 GtkStateType state,
                                                 GdkColor *color);
    void        gtk_widget_modify_text          (GtkWidget *widget,
                                                 GtkStateType state,
                                                 GdkColor *color);
    void        gtk_widget_modify_base          (GtkWidget *widget,
                                                 GtkStateType state,
                                                 GdkColor *color);
    void        gtk_widget_modify_font          (GtkWidget *widget,
                                                 PangoFontDescription *font_desc);
    PangoContext* gtk_widget_create_pango_context
                                                (GtkWidget *widget);
    PangoContext* gtk_widget_get_pango_context  (GtkWidget *widget);
    PangoLayout* gtk_widget_create_pango_layout (GtkWidget *widget,
                                                 const gchar *text);
    GdkPixbuf*  gtk_widget_render_icon          (GtkWidget *widget,
                                                 const gchar *stock_id,
                                                 GtkIconSize size,
                                                 const gchar *detail);
    void        gtk_widget_pop_composite_child  (void);
    void        gtk_widget_push_composite_child (void);
    void        gtk_widget_queue_clear          (GtkWidget *widget);
    void        gtk_widget_queue_clear_area     (GtkWidget *widget,
                                                 gint x,
                                                 gint y,
                                                 gint width,
                                                 gint height);
    void        gtk_widget_queue_draw_area      (GtkWidget *widget,
                                                 gint x,
                                                 gint y,
                                                 gint width,
                                                 gint height);
    void        gtk_widget_reset_shapes         (GtkWidget *widget);
    void        gtk_widget_set_app_paintable    (GtkWidget *widget,
                                                 gboolean app_paintable);
    void        gtk_widget_set_double_buffered  (GtkWidget *widget,
                                                 gboolean double_buffered);
    void        gtk_widget_set_redraw_on_allocate
                                                (GtkWidget *widget,
                                                 gboolean redraw_on_allocate);
    void        gtk_widget_set_composite_name   (GtkWidget *widget,
                                                 const gchar *name);
    gboolean    gtk_widget_set_scroll_adjustments
                                                (GtkWidget *widget,
                                                 GtkAdjustment *hadjustment,
                                                 GtkAdjustment *vadjustment);
    gboolean    gtk_widget_mnemonic_activate    (GtkWidget *widget,
                                                 gboolean group_cycling);
    void        gtk_widget_class_install_style_property
                                                (GtkWidgetClass *klass,
                                                 GParamSpec *pspec);
    void        gtk_widget_class_install_style_property_parser
                                                (GtkWidgetClass *klass,
                                                 GParamSpec *pspec,
                                                 GtkRcPropertyParser parser);
    GParamSpec* gtk_widget_class_find_style_property
                                                (GtkWidgetClass *klass,
                                                 const gchar *property_name);
    GParamSpec** gtk_widget_class_list_style_properties
                                                (GtkWidgetClass *klass,
                                                 guint *n_properties);
    GdkRegion*  gtk_widget_region_intersect     (GtkWidget *widget,
                                                 GdkRegion *region);
    gint        gtk_widget_send_expose          (GtkWidget *widget,
                                                 GdkEvent *event);
    void        gtk_widget_style_get            (GtkWidget *widget,
                                                 const gchar *first_property_name,
                                                 ...);
    void        gtk_widget_style_get_property   (GtkWidget *widget,
                                                 const gchar *property_name,
                                                 GValue *value);
    void        gtk_widget_style_get_valist     (GtkWidget *widget,
                                                 const gchar *first_property_name,
                                                 va_list var_args);
    AtkObject*  gtk_widget_get_accessible       (GtkWidget *widget);
    gboolean    gtk_widget_child_focus          (GtkWidget *widget,
                                                 GtkDirectionType direction);
    void        gtk_widget_child_notify         (GtkWidget *widget,
                                                 const gchar *child_property);
    void        gtk_widget_freeze_child_notify  (GtkWidget *widget);
    gboolean    gtk_widget_get_child_visible    (GtkWidget *widget);
    GtkWidget*  gtk_widget_get_parent           (GtkWidget *widget);
    GtkSettings* gtk_widget_get_settings        (GtkWidget *widget);
    GtkClipboard* gtk_widget_get_clipboard      (GtkWidget *widget,
                                                 GdkAtom selection);
    GdkDisplay* gtk_widget_get_display          (GtkWidget *widget);
    GdkWindow*  gtk_widget_get_root_window      (GtkWidget *widget);
    GdkScreen*  gtk_widget_get_screen           (GtkWidget *widget);
    gboolean    gtk_widget_has_screen           (GtkWidget *widget);
    void        gtk_widget_get_size_request     (GtkWidget *widget,
                                                 gint *width,
                                                 gint *height);
    #define     gtk_widget_pop_visual           ()
    #define     gtk_widget_push_visual          (visual)
    void        gtk_widget_set_child_visible    (GtkWidget *widget,
                                                 gboolean is_visible);
    #define     gtk_widget_set_default_visual   (visual)
    void        gtk_widget_set_size_request     (GtkWidget *widget,
                                                 gint width,
                                                 gint height);
    #define     gtk_widget_set_visual           (widget,visual)
    void        gtk_widget_thaw_child_notify    (GtkWidget *widget);

    GtkRequisition* gtk_requisition_copy        (const GtkRequisition *requisition);
    void        gtk_requisition_free            (GtkRequisition *requisition);

## Object Hierarchy

      GObject
       +----GtkObject
             +----GtkWidget
                   +----GtkMisc
                   +----GtkContainer
                   +----GtkCalendar
                   +----GtkDrawingArea
                   +----GtkEntry
                   +----GtkRuler
                   +----GtkRange
                   +----GtkSeparator
                   +----GtkInvisible
                   +----GtkOldEditable
                   +----GtkPreview
                   +----GtkProgress

## Known Derived Interfaces

GtkWidget is required by GtkCellEditable.

## Implemented Interfaces

GtkWidget implements AtkImplementorIface.

## Properties

      "app-paintable"        gboolean             : Read / Write
      "can-default"          gboolean             : Read / Write
      "can-focus"            gboolean             : Read / Write
      "composite-child"      gboolean             : Read
      "events"               GdkEventMask         : Read / Write
      "extension-events"     GdkExtensionMode     : Read / Write
      "has-default"          gboolean             : Read / Write
      "has-focus"            gboolean             : Read / Write
      "height-request"       gint                 : Read / Write
      "is-focus"             gboolean             : Read / Write
      "name"                 gchararray           : Read / Write
      "parent"               GtkContainer         : Read / Write
      "receives-default"     gboolean             : Read / Write
      "sensitive"            gboolean             : Read / Write
      "style"                GtkStyle             : Read / Write
      "visible"              gboolean             : Read / Write
      "width-request"        gint                 : Read / Write

## Style Properties

      "cursor-aspect-ratio"  gfloat               : Read
      "cursor-color"         GdkColor             : Read
      "focus-line-pattern"   gchararray           : Read / Write
      "focus-line-width"     gint                 : Read / Write
      "focus-padding"        gint                 : Read / Write
      "interior-focus"       gboolean             : Read
      "secondary-cursor-color" GdkColor             : Read

## Signal Prototypes

    "accel-closures-changed"
                void        user_function      (GtkWidget *widget,
                                                gpointer user_data);
    "button-press-event"
                gboolean    user_function      (GtkWidget *widget,
                                                GdkEventButton *event,
                                                gpointer user_data);
    "button-release-event"
                gboolean    user_function      (GtkWidget *widget,
                                                GdkEventButton *event,
                                                gpointer user_data);
    "child-notify"
                void        user_function      (GtkWidget *widget,
                                                GParamSpec *pspec,
                                                gpointer user_data);
    "client-event"
                gboolean    user_function      (GtkWidget *widget,
                                                GdkEventClient *event,
                                                gpointer user_data);
    "configure-event"
                gboolean    user_function      (GtkWidget *widget,
                                                GdkEventConfigure *event,
                                                gpointer user_data);
    "delete-event"
                gboolean    user_function      (GtkWidget *widget,
                                                GdkEvent *event,
                                                gpointer user_data);
    "destroy-event"
                gboolean    user_function      (GtkWidget *widget,
                                                GdkEvent *event,
                                                gpointer user_data);
    "direction-changed"
                void        user_function      (GtkWidget *widget,
                                                GtkTextDirection arg1,
                                                gpointer user_data);
    "drag-begin"
                void        user_function      (GtkWidget *widget,
                                                GdkDragContext *drag_context,
                                                gpointer user_data);
    "drag-data-delete"
                void        user_function      (GtkWidget *widget,
                                                GdkDragContext *drag_context,
                                                gpointer user_data);
    "drag-data-get"
                void        user_function      (GtkWidget *widget,
                                                GdkDragContext *drag_context,
                                                GtkSelectionData *data,
                                                guint info,
                                                guint time,
                                                gpointer user_data);
    "drag-data-received"
                void        user_function      (GtkWidget *widget,
                                                GdkDragContext *drag_context,
                                                gint x,
                                                gint y,
                                                GtkSelectionData *data,
                                                guint info,
                                                guint time,
                                                gpointer user_data);
    "drag-drop" gboolean    user_function      (GtkWidget *widget,
                                                GdkDragContext *drag_context,
                                                gint x,
                                                gint y,
                                                guint time,
                                                gpointer user_data);
    "drag-end"  void        user_function      (GtkWidget *widget,
                                                GdkDragContext *drag_context,
                                                gpointer user_data);
    "drag-leave"
                void        user_function      (GtkWidget *widget,
                                                GdkDragContext *drag_context,
                                                guint time,
                                                gpointer user_data);
    "drag-motion"
                gboolean    user_function      (GtkWidget *widget,
                                                GdkDragContext *drag_context,
                                                gint x,
                                                gint y,
                                                guint time,
                                                gpointer user_data);
    "enter-notify-event"
                gboolean    user_function      (GtkWidget *widget,
                                                GdkEventCrossing *event,
                                                gpointer user_data);
    "event"     gboolean    user_function      (GtkWidget *widget,
                                                GdkEvent *event,
                                                gpointer user_data);
    "event-after"
                void        user_function      (GtkWidget *widget,
                                                GdkEvent *event,
                                                gpointer user_data);
    "expose-event"
                gboolean    user_function      (GtkWidget *widget,
                                                GdkEventExpose *event,
                                                gpointer user_data);
    "focus"     gboolean    user_function      (GtkWidget *widget,
                                                GtkDirectionType arg1,
                                                gpointer user_data);
    "focus-in-event"
                gboolean    user_function      (GtkWidget *widget,
                                                GdkEventFocus *event,
                                                gpointer user_data);
    "focus-out-event"
                gboolean    user_function      (GtkWidget *widget,
                                                GdkEventFocus *event,
                                                gpointer user_data);
    "grab-focus"
                void        user_function      (GtkWidget *widget,
                                                gpointer user_data);
    "grab-notify"
                void        user_function      (GtkWidget *widget,
                                                gboolean arg1,
                                                gpointer user_data);
    "hide"      void        user_function      (GtkWidget *widget,
                                                gpointer user_data);
    "hierarchy-changed"
                void        user_function      (GtkWidget *widget,
                                                GtkWidget *widget2,
                                                gpointer user_data);
    "key-press-event"
                gboolean    user_function      (GtkWidget *widget,
                                                GdkEventKey *event,
                                                gpointer user_data);
    "key-release-event"
                gboolean    user_function      (GtkWidget *widget,
                                                GdkEventKey *event,
                                                gpointer user_data);
    "leave-notify-event"
                gboolean    user_function      (GtkWidget *widget,
                                                GdkEventCrossing *event,
                                                gpointer user_data);
    "map"       void        user_function      (GtkWidget *widget,
                                                gpointer user_data);
    "map-event" gboolean    user_function      (GtkWidget *widget,
                                                GdkEvent *event,
                                                gpointer user_data);
    "mnemonic-activate"
                gboolean    user_function      (GtkWidget *widget,
                                                gboolean arg1,
                                                gpointer user_data);
    "motion-notify-event"
                gboolean    user_function      (GtkWidget *widget,
                                                GdkEventMotion *event,
                                                gpointer user_data);
    "no-expose-event"
                gboolean    user_function      (GtkWidget *widget,
                                                GdkEventNoExpose *event,
                                                gpointer user_data);
    "parent-set"
                void        user_function      (GtkWidget *widget,
                                                GtkObject *old_parent,
                                                gpointer user_data);
    "popup-menu"
                gboolean    user_function      (GtkWidget *widget,
                                                gpointer user_data);
    "property-notify-event"
                gboolean    user_function      (GtkWidget *widget,
                                                GdkEventProperty *event,
                                                gpointer user_data);
    "proximity-in-event"
                gboolean    user_function      (GtkWidget *widget,
                                                GdkEventProximity *event,
                                                gpointer user_data);
    "proximity-out-event"
                gboolean    user_function      (GtkWidget *widget,
                                                GdkEventProximity *event,
                                                gpointer user_data);
    "realize"   void        user_function      (GtkWidget *widget,
                                                gpointer user_data);
    "screen-changed"
                void        user_function      (GtkWidget *widget,
                                                GdkScreen *arg1,
                                                gpointer user_data);
    "scroll-event"
                gboolean    user_function      (GtkWidget *widget,
                                                GdkEvent *event,
                                                gpointer user_data);
    "selection-clear-event"
                gboolean    user_function      (GtkWidget *widget,
                                                GdkEventSelection *event,
                                                gpointer user_data);
    "selection-get"
                void        user_function      (GtkWidget *widget,
                                                GtkSelectionData *data,
                                                guint info,
                                                guint time,
                                                gpointer user_data);
    "selection-notify-event"
                gboolean    user_function      (GtkWidget *widget,
                                                GdkEventSelection *event,
                                                gpointer user_data);
    "selection-received"
                void        user_function      (GtkWidget *widget,
                                                GtkSelectionData *data,
                                                guint time,
                                                gpointer user_data);
    "selection-request-event"
                gboolean    user_function      (GtkWidget *widget,
                                                GdkEventSelection *event,
                                                gpointer user_data);
    "show"      void        user_function      (GtkWidget *widget,
                                                gpointer user_data);
    "show-help" gboolean    user_function      (GtkWidget *widget,
                                                GtkWidgetHelpType arg1,
                                                gpointer user_data);
    "size-allocate"
                void        user_function      (GtkWidget *widget,
                                                GtkAllocation *allocation,
                                                gpointer user_data);
    "size-request"
                void        user_function      (GtkWidget *widget,
                                                GtkRequisition *requisition,
                                                gpointer user_data);
    "state-changed"
                void        user_function      (GtkWidget *widget,
                                                GtkStateType state,
                                                gpointer user_data);
    "style-set" void        user_function      (GtkWidget *widget,
                                                GtkStyle *previous_style,
                                                gpointer user_data);
    "unmap"     void        user_function      (GtkWidget *widget,
                                                gpointer user_data);
    "unmap-event"
                gboolean    user_function      (GtkWidget *widget,
                                                GdkEvent *event,
                                                gpointer user_data);
    "unrealize" void        user_function      (GtkWidget *widget,
                                                gpointer user_data);
    "visibility-notify-event"
                gboolean    user_function      (GtkWidget *widget,
                                                GdkEvent *event,
                                                gpointer user_data);
    "window-state-event"
                gboolean    user_function      (GtkWidget *widget,
                                                GdkEvent *event,
                                                gpointer user_data);

## Description

GtkWidget introduces style properties - these are basically object properties that are stored not on the object, but in the style object associated to the widget. Style properties are set in resource files. This mechanism is used for configuring such things as the location of the scrollbar arrows through the theme, giving theme authors more control over the look of applications without the need to write a theme engine in C.

Use `gtk_widget_class_install_style_property()` to install style properties for a widget class, `gtk_widget_class_find_style_property()` or `gtk_widget_class_list_style_properties()` to get information about existing style properties and `gtk_widget_style_get_property()`, `gtk_widget_style_get()` or `gtk_widget_style_get_valist()` to obtain the value of a style property.

## Details

### struct GtkWidget

    struct GtkWidget {

      /* The style for the widget. The style contains the
       *  colors the widget should be drawn in for each state
       *  along with graphics contexts used to draw with and
       *  the font to use for text.
       */
      GtkStyle *style;

      /* The widgets desired size.
       */
      GtkRequisition requisition;

      /* The widgets allocated size.
       */
      GtkAllocation allocation;

      /* The widgets window or its parent window if it does
       *  not have a window. (Which will be indicated by the
       *  GTK_NO_WINDOW flag being set).
       */
      GdkWindow *window;

      /* The widgets parent.
       */
      GtkWidget *parent;
    };

GtkStyle *`style` | The style for the widget. The style contains the colors the widget should be drawn in for each state along with graphics contexts used to draw with and the font to use for text.
GtkRequisition `requisition` | The widgets desired size.
GtkAllocation `allocation` | The widgets allocated size.
GdkWindow *`window` | The widgets window or its parent window if it does not have a window. (Which will be indicated by the GTK_NO_WINDOW flag being set).
GtkWidget *`parent` |

### struct GtkWidgetClass

    struct GtkWidgetClass {

      /* The object class structure needs to be the first
       *  element in the widget class structure in order for
       *  the class mechanism to work correctly. This allows a
       *  GtkWidgetClass pointer to be cast to a GtkObjectClass
       *  pointer.
       */
      GtkObjectClass parent_class;

      guint activate_signal;

      guint set_scroll_adjustments_signal;

    };

`activate_signal` The signal to emit when a widget of this class is activated, `gtk_widget_activate()` handles the emission. Implementation of this signal is optional.

`set_scroll_adjustment_signal` This signal is emitted when a widget of this class is added to a scrolling aware parent, `gtk_widget_set_scroll_adjustments()` handles the emission. Implementation of this signal is optional.

### enum GtkWidgetFlags

    typedef enum
    {
      GTK_TOPLEVEL         = 1 << 4,
      GTK_NO_WINDOW        = 1 << 5,
      GTK_REALIZED         = 1 << 6,
      GTK_MAPPED           = 1 << 7,
      GTK_VISIBLE          = 1 << 8,
      GTK_SENSITIVE        = 1 << 9,
      GTK_PARENT_SENSITIVE = 1 << 10,
      GTK_CAN_FOCUS        = 1 << 11,
      GTK_HAS_FOCUS        = 1 << 12,

      /* widget is allowed to receive the default via gtk_widget_grab_default
       * and will reserve space to draw the default if possible
       */
      GTK_CAN_DEFAULT      = 1 << 13,

      /* the widget currently is receiving the default action and should be drawn
       * appropriately if possible
       */
      GTK_HAS_DEFAULT      = 1 << 14,

      GTK_HAS_GRAB	       = 1 << 15,
      GTK_RC_STYLE	       = 1 << 16,
      GTK_COMPOSITE_CHILD  = 1 << 17,
      GTK_NO_REPARENT      = 1 << 18,
      GTK_APP_PAINTABLE    = 1 << 19,

      /* the widget when focused will receive the default action and have
       * HAS_DEFAULT set even if there is a different widget set as default
       */
      GTK_RECEIVES_DEFAULT = 1 << 20,

      GTK_DOUBLE_BUFFERED  = 1 << 21
    } GtkWidgetFlags;

Tells about certain properties of the widget.

`GTK_TOPLEVEL` | widgets without a real parent, as there are GtkWindows and GtkMenus have this flag set throughout their lifetime. Toplevel widgets always contain their own GdkWindow.
`GTK_NO_WINDOW` | Indicative for a widget that does not provide its own GdkWindow. Visible action (e.g. drawing) is performed on the parent's GdkWindow.
`GTK_REALIZED` | Set by `gtk_widget_realize()`, unset by `gtk_widget_unrealize()`. A realized widget has an associated GdkWindow.
`GTK_MAPPED` | Set by `gtk_widget_map()`, unset by `gtk_widget_unmap()`. Only realized widgets can be mapped. It means that `gdk_window_show()` has been called on the widgets window(s).
`GTK_VISIBLE` | Set by `gtk_widget_show()`, unset by `gtk_widget_hide()`. Implies that a widget will be mapped as soon as its parent is mapped.
`GTK_SENSITIVE` | Set and unset by `gtk_widget_set_sensitive()`. The sensitivity of a widget determines whether it will receive certain events (e.g. button or key presses). One premise for the widgets sensitivity is to have this flag set.
`GTK_PARENT_SENSITIVE` | Set and unset by `gtk_widget_set_sensitive()` operations on the parents of the widget. This is the second premise for the widgets sensitivity. Once it has `GTK_SENSITIVE` and `GTK_PARENT_SENSITIVE` set, its state is effectively sensitive. This is expressed (and can be examined) by the GTK_WIDGET_IS_SENSITIVE macro.
`GTK_CAN_FOCUS` | Determines whether a widget is able to handle focus grabs.
`GTK_HAS_FOCUS` | Set by `gtk_widget_grab_focus()` for widgets that also have `GTK_CAN_FOCUS` set. The flag will be unset once another widget grabs the focus.
`GTK_CAN_DEFAULT` | The widget is allowed to receive the default action via `gtk_widget_grab_default()`.
`GTK_HAS_DEFAULT` | The widget currently is receiving the default action.
`GTK_HAS_GRAB` | Set by `gtk_grab_add()`, unset by `gtk_grab_remove()`. It means that the widget is in the grab_widgets stack, and will be the preferred one for receiving events other than ones of cosmetic value.
`GTK_RC_STYLE` | Indicates that the widgets style has been looked up through the rc mechanism. It does not imply that the widget actually had a style defined through the rc mechanism.
`GTK_COMPOSITE_CHILD` | Indicates that the widget is a composite child of its parent; see `gtk_widget_push_composite_child()`, `gtk_widget_pop_composite_child()`.
`GTK_NO_REPARENT` | Unused since before GTK+ 1.2, will be removed in a future version.
`GTK_APP_PAINTABLE` | Set and unset by `gtk_widget_set_app_paintable()`. Must be set on widgets whose window the application directly draws on, in order to keep GTK+ from overwriting the drawn stuff.
`GTK_RECEIVES_DEFAULT` | The widget when focused will receive the default action and have `GTK_HAS_DEFAULT` set even if there is a different widget set as default.
`GTK_DOUBLE_BUFFERED` | Set and unset by `gtk_widget_set_double_buffered()`. Indicates that exposes done on the widget should be double-buffered.

### GTK_WIDGET_TYPE()

    #define GTK_WIDGET_TYPE(wid)		  (GTK_OBJECT_TYPE (wid))

Gets the type of a widget.

`wid` : | a GtkWidget.

### GTK_WIDGET_STATE()

    #define GTK_WIDGET_STATE(wid)		  (GTK_WIDGET (wid)->state)

Returns the current state of the widget, as a GtkStateType.

`wid` : | a GtkWidget.

### GTK_WIDGET_SAVED_STATE()

    #define GTK_WIDGET_SAVED_STATE(wid)	  (GTK_WIDGET (wid)->saved_state)

Returns the saved state of the widget, as a GtkStateType.

The saved state will be restored when a widget gets sensitive again, after it has been made insensitive with `gtk_widget_set_state()` or `gtk_widget_set_sensitive()`.

`wid` : | a GtkWidget.

### GTK_WIDGET_FLAGS()

    #define GTK_WIDGET_FLAGS(wid)		  (GTK_OBJECT_FLAGS (wid))

Returns the widget flags from `wid`.

`wid` : | a GtkWidget.

### GTK_WIDGET_TOPLEVEL()

    #define GTK_WIDGET_TOPLEVEL(wid)	  ((GTK_WIDGET_FLAGS (wid) & GTK_TOPLEVEL) != 0)

Evaluates to `TRUE` if the widget is a toplevel widget.

`wid` : | a GtkWidget.

### GTK_WIDGET_NO_WINDOW()

    #define GTK_WIDGET_NO_WINDOW(wid)	  ((GTK_WIDGET_FLAGS (wid) & GTK_NO_WINDOW) != 0)

Evaluates to `TRUE` if the widget doesn't have an own GdkWindow.

`wid` : | a GtkWidget.

### GTK_WIDGET_REALIZED()

    #define GTK_WIDGET_REALIZED(wid)	  ((GTK_WIDGET_FLAGS (wid) & GTK_REALIZED) != 0)

Evaluates to `TRUE` if the widget is realized.

`wid` : | a GtkWidget.

### GTK_WIDGET_MAPPED()

    #define GTK_WIDGET_MAPPED(wid)		  ((GTK_WIDGET_FLAGS (wid) & GTK_MAPPED) != 0)

Evaluates to `TRUE` if the widget is mapped.

`wid` : | a GtkWidget.

### GTK_WIDGET_VISIBLE()

    #define GTK_WIDGET_VISIBLE(wid)		  ((GTK_WIDGET_FLAGS (wid) & GTK_VISIBLE) != 0)

Evaluates to `TRUE` if the widget is visible.

`wid` : | a GtkWidget.

### GTK_WIDGET_DRAWABLE()

    #define GTK_WIDGET_DRAWABLE(wid)	  (GTK_WIDGET_VISIBLE (wid) && GTK_WIDGET_MAPPED (wid))

Evaluates to `TRUE` if the widget is mapped and visible.

`wid` : | a GtkWidget.

### GTK_WIDGET_SENSITIVE()

    #define GTK_WIDGET_SENSITIVE(wid)	  ((GTK_WIDGET_FLAGS (wid) & GTK_SENSITIVE) != 0)

Evaluates to `TRUE` if the GTK_SENSITIVE flag has be set on the widget.

`wid` : | a GtkWidget.

### GTK_WIDGET_PARENT_SENSITIVE()

    #define GTK_WIDGET_PARENT_SENSITIVE(wid)  ((GTK_WIDGET_FLAGS (wid) & GTK_PARENT_SENSITIVE) != 0)

Evaluates to `TRUE` if the GTK_PARENT_SENSITIVE flag has be set on the widget.

`wid` : | a GtkWidget.

### GTK_WIDGET_IS_SENSITIVE()

    #define     GTK_WIDGET_IS_SENSITIVE(wid)

Evaluates to `TRUE` if the widget is effectively sensitive.

`wid` : | a GtkWidget.

### GTK_WIDGET_CAN_FOCUS()

    #define GTK_WIDGET_CAN_FOCUS(wid)	  ((GTK_WIDGET_FLAGS (wid) & GTK_CAN_FOCUS) != 0)

Evaluates to `TRUE` if the widget is able to handle focus grabs.

`wid` : | a GtkWidget.

### GTK_WIDGET_HAS_FOCUS()

    #define GTK_WIDGET_HAS_FOCUS(wid)	  ((GTK_WIDGET_FLAGS (wid) & GTK_HAS_FOCUS) != 0)

Evaluates to `TRUE` if the widget has grabbed the focus and no other widget has done so more recently.

`wid` : | a GtkWidget.

### GTK_WIDGET_CAN_DEFAULT()

    #define GTK_WIDGET_CAN_DEFAULT(wid)	  ((GTK_WIDGET_FLAGS (wid) & GTK_CAN_DEFAULT) != 0)

Evaluates to `TRUE` if the widget is allowed to receive the default action via `gtk_widget_grab_default()`.

`wid` : | a GtkWidget.

### GTK_WIDGET_RECEIVES_DEFAULT()

    #define GTK_WIDGET_RECEIVES_DEFAULT(wid)  ((GTK_WIDGET_FLAGS (wid) & GTK_RECEIVES_DEFAULT) != 0)

Evaluates to `TRUE` if the widget when focused will receive the default action even if there is a different widget set as default.

`wid` : | a GtkWidget.

### GTK_WIDGET_HAS_DEFAULT()

    #define GTK_WIDGET_HAS_DEFAULT(wid)	  ((GTK_WIDGET_FLAGS (wid) & GTK_HAS_DEFAULT) != 0)

Evaluates to `TRUE` if the widget currently is receiving the default action.

`wid` : | a GtkWidget.

### GTK_WIDGET_HAS_GRAB()

    #define GTK_WIDGET_HAS_GRAB(wid)	  ((GTK_WIDGET_FLAGS (wid) & GTK_HAS_GRAB) != 0)

Evaluates to `TRUE` if the widget is in the grab_widgets stack, and will be the preferred one for receiving events other than ones of cosmetic value.

`wid` : | a GtkWidget.

### GTK_WIDGET_RC_STYLE()

    #define GTK_WIDGET_RC_STYLE(wid)	  ((GTK_WIDGET_FLAGS (wid) & GTK_RC_STYLE) != 0)

Evaluates to `TRUE` if the widgets style has been looked up through the rc mechanism.

`wid` : | a GtkWidget.

### GTK_WIDGET_COMPOSITE_CHILD()

    #define GTK_WIDGET_COMPOSITE_CHILD(wid)	  ((GTK_WIDGET_FLAGS (wid) & GTK_COMPOSITE_CHILD) != 0)

Evaluates to `TRUE` if the widget is a composite child of its parent.

`wid` : | a GtkWidget.

### GTK_WIDGET_APP_PAINTABLE()

    #define GTK_WIDGET_APP_PAINTABLE(wid)	  ((GTK_WIDGET_FLAGS (wid) & GTK_APP_PAINTABLE) != 0)

Evaluates to `TRUE` if the GTK_APP_PAINTABLE flag has been set on the widget.

`wid` : | a GtkWidget.

### GTK_WIDGET_DOUBLE_BUFFERED()

    #define GTK_WIDGET_DOUBLE_BUFFERED(wid)	  ((GTK_WIDGET_FLAGS (wid) & GTK_DOUBLE_BUFFERED) != 0)

Evaluates to `TRUE` if the GTK_DOUBLE_BUFFERED flag has been set on the widget.

`wid` : |

### GTK_WIDGET_SET_FLAGS()

    #define GTK_WIDGET_SET_FLAGS(wid,flag)	  G_STMT_START{ (GTK_WIDGET_FLAGS (wid) |= (flag)); }G_STMT_END

Turns on certain widget flags.

`wid` : | a GtkWidget.
`flag` : | the flags to set.

### GTK_WIDGET_UNSET_FLAGS()

    #define GTK_WIDGET_UNSET_FLAGS(wid,flag)  G_STMT_START{ (GTK_WIDGET_FLAGS (wid) &= ~(flag)); }G_STMT_END

Turns off certain widget flags.

`wid` : | a GtkWidget.
`flag` : | the flags to unset.

### GtkCallback ()

    void        (*GtkCallback)                  (GtkWidget *widget,
                                                 gpointer data);

`widget` : |
`data` : |

### struct GtkRequisition

    struct GtkRequisition {

      gint width;
      gint height;
    };

### struct GtkAllocation

    struct GtkAllocation {

      gint x;
      gint y;
      gint width;
      gint height;
    };

### struct GtkSelectionData

    struct GtkSelectionData {

      GdkAtom	selection;
      GdkAtom	target;
      GdkAtom	type;
      gint		format;
      guchar       *data;
      gint		length;
      GdkDisplay   *display;
    };

### struct GtkWidgetAuxInfo

    struct GtkWidgetAuxInfo {

      gint x;
      gint y;
      gint width;
      gint height;
      guint x_set : 1;
      guint y_set : 1;
    };

### struct GtkWidgetShapeInfo

    struct GtkWidgetShapeInfo {

      gint16     offset_x;
      gint16     offset_y;
      GdkBitmap *shape_mask;
    };

### enum GtkWidgetHelpType

    typedef enum
    {
      GTK_WIDGET_HELP_TOOLTIP,
      GTK_WIDGET_HELP_WHATS_THIS
    } GtkWidgetHelpType;

### gtk_widget_new ()

    GtkWidget*  gtk_widget_new                  (GType type,
                                                 const gchar *first_property_name,
                                                 ...);

This is a convenience function for creating a widget and setting its properties in one go. For example you might write: `gtk_widget_new (GTK_TYPE_LABEL, "label", "Hello World", "xalign", 0.0, NULL)` to create a left-aligned label. Equivalent to `g_object_new()`, but returns a widget so you don't have to cast the object yourself.

`type` : | type ID of the widget to create
`first_property_name` : | name of first property to set
`...` : | value of first property, followed by more properties, `NULL`-terminated
Returns : | a new GtkWidget of type `widget_type`

### gtk_widget_ref ()

    GtkWidget*  gtk_widget_ref                  (GtkWidget *widget);

Adds a reference to a widget. This function is exactly the same as calling `g_object_ref()`, and exists mostly for historical reasons. It can still be convenient to avoid casting a widget to a GObject, it saves a small amount of typing.

`widget` : | a GtkWidget
Returns : | the widget that was referenced

### gtk_widget_unref ()

    void        gtk_widget_unref                (GtkWidget *widget);

Inverse of `gtk_widget_ref()`. Equivalent to `g_object_unref()`.

`widget` : | a GtkWidget

### gtk_widget_destroy ()

    void        gtk_widget_destroy              (GtkWidget *widget);

Destroys a widget. Equivalent to `gtk_object_destroy()`, except that you don't have to cast the widget to GtkObject. When a widget is destroyed, it will break any references it holds to other objects. If the widget is inside a container, the widget will be removed from the container. If the widget is a toplevel (derived from GtkWindow), it will be removed from the list of toplevels, and the reference GTK+ holds to it will be removed. Removing a widget from its container or the list of toplevels results in the widget being finalized, unless you've added additional references to the widget with `g_object_ref()`.

In most cases, only toplevel widgets (windows) require explicit destruction, because when you destroy a toplevel its children will be destroyed as well.

`widget` : | a GtkWidget

### gtk_widget_destroyed ()

    void        gtk_widget_destroyed            (GtkWidget *widget,
                                                 GtkWidget **widget_pointer);

This function sets *`widget_pointer` to `NULL` if `widget_pointer` != `NULL`. It's intended to be used as a callback connected to the "destroy" signal of a widget. You connect `gtk_widget_destroyed()` as a signal handler, and pass the address of your widget variable as user data. Then when the widget is destroyed, the variable will be set to `NULL`. Useful for example to avoid multiple copies of the same dialog.

`widget` : | a GtkWidget
`widget_pointer` : | address of a variable that contains `widget`

### gtk_widget_set ()

    void        gtk_widget_set                  (GtkWidget *widget,
                                                 const gchar *first_property_name,
                                                 ...);

### Warning

`gtk_widget_set` is deprecated and should not be used in newly-written code.

Like `g_object_set()` - there's no reason to use this instead of `g_object_set()`.

`widget` : | a GtkWidget
`first_property_name` : | name of first property to set
`...` : | value of first property, followed by more properties, `NULL`-terminated

### gtk_widget_unparent ()

    void        gtk_widget_unparent             (GtkWidget *widget);

This function is only for use in widget implementations. Should be called by implementations of the remove method on GtkContainer, to dissociate a child from the container.

`widget` : | a GtkWidget

### gtk_widget_show ()

    void        gtk_widget_show                 (GtkWidget *widget);

Flags a widget to be displayed. Any widget that isn't shown will not appear on the screen. If you want to show all the widgets in a container, it's easier to call `gtk_widget_show_all()` on the container, instead of individually showing the widgets.

Remember that you have to show the containers containing a widget, in addition to the widget itself, before it will appear onscreen.

When a toplevel container is shown, it is immediately realized and mapped; other shown widgets are realized and mapped when their toplevel container is realized and mapped.

`widget` : | a GtkWidget

### gtk_widget_show_now ()

    void        gtk_widget_show_now             (GtkWidget *widget);

Shows a widget. If the widget is an unmapped toplevel widget (i.e. a GtkWindow that has not yet been shown), enter the main loop and wait for the window to actually be mapped. Be careful; because the main loop is running, anything can happen during this function.

`widget` : | a GtkWidget

### gtk_widget_hide ()

    void        gtk_widget_hide                 (GtkWidget *widget);

Reverses the effects of `gtk_widget_show()`, causing the widget to be hidden (invisible to the user).

`widget` : | a GtkWidget

### gtk_widget_show_all ()

    void        gtk_widget_show_all             (GtkWidget *widget);

Recursively shows a widget, and any child widgets (if the widget is a container).

`widget` : | a GtkWidget

### gtk_widget_hide_all ()

    void        gtk_widget_hide_all             (GtkWidget *widget);

Recursively hides a widget and any child widgets.

`widget` : | a GtkWidget

### gtk_widget_map ()

    void        gtk_widget_map                  (GtkWidget *widget);

This function is only for use in widget implementations. Causes a widget to be mapped if it isn't already.

`widget` : | a GtkWidget

### gtk_widget_unmap ()

    void        gtk_widget_unmap                (GtkWidget *widget);

This function is only for use in widget implementations. Causes a widget to be unmapped if it's currently mapped.

`widget` : | a GtkWidget

### gtk_widget_realize ()

    void        gtk_widget_realize              (GtkWidget *widget);

Creates the GDK (windowing system) resources associated with a widget. For example, `widget->window` will be created when a widget is realized. Normally realization happens implicitly; if you show a widget and all its parent containers, then the widget will be realized and mapped automatically.

Realizing a widget requires all the widget's parent widgets to be realized; calling `gtk_widget_realize()` realizes the widget's parents in addition to `widget` itself. If a widget is not yet inside a toplevel window when you realize it, bad things will happen.

This function is primarily used in widget implementations, and isn't very useful otherwise. Many times when you think you might need it, a better approach is to connect to a signal that will be called after the widget is realized automatically, such as "expose_event". Or simply `g_signal_connect_after()` to the "realize" signal.

`widget` : | a GtkWidget

### gtk_widget_unrealize ()

    void        gtk_widget_unrealize            (GtkWidget *widget);

This function is only useful in widget implementations. Causes a widget to be unrealized (frees all GDK resources associated with the widget, such as `widget->window`).

`widget` : | a GtkWidget

### gtk_widget_queue_draw ()

    void        gtk_widget_queue_draw           (GtkWidget *widget);

Equivalent to calling `gtk_widget_queue_draw_area()` for the entire area of a widget.

`widget` : | a GtkWidget

### gtk_widget_queue_resize ()

    void        gtk_widget_queue_resize         (GtkWidget *widget);

This function is only for use in widget implementations. Flags a widget to have its size renegotiated; should be called when a widget for some reason has a new size request. For example, when you change the text in a GtkLabel, GtkLabel queues a resize to ensure there's enough space for the new text.

`widget` : | a GtkWidget

### gtk_widget_draw ()

    void        gtk_widget_draw                 (GtkWidget *widget,
                                                 GdkRectangle *area);

### Warning

`gtk_widget_draw` is deprecated and should not be used in newly-written code.

DEPRECATED. In GTK+ 1.2, this function would immediately render the region `area` of a widget, by invoking the virtual draw method of a widget. In GTK+ 2.0, the draw method is gone, and instead `gtk_widget_draw()` simply invalidates the specified region of the widget, then updates the invalid region of the widget immediately. Usually you don't want to update the region immediately for performance reasons, so in general `gtk_widget_queue_draw_area()` is a better choice if you want to draw a region of a widget.

`widget` : | a GtkWidget
`area` : | area to draw

### gtk_widget_size_request ()

    void        gtk_widget_size_request         (GtkWidget *widget,
                                                 GtkRequisition *requisition);

This function is typically used when implementing a GtkContainer subclass. Obtains the preferred size of a widget. The container uses this information to arrange its child widgets and decide what size allocations to give them with `gtk_widget_size_allocate()`.

You can also call this function from an application, with some caveats. Most notably, getting a size request requires the widget to be associated with a screen, because font information may be needed. Multihead-aware applications should keep this in mind.

Also remember that the size request is not necessarily the size a widget will actually be allocated.

See also `gtk_widget_get_child_requisition()`.

`widget` : | a GtkWidget
`requisition` : | a GtkRequisition to be filled in

### gtk_widget_get_child_requisition ()

    void        gtk_widget_get_child_requisition
                                                (GtkWidget *widget,
                                                 GtkRequisition *requisition);

This function is only for use in widget implementations. Obtains `widget->requisition`, unless someone has forced a particular geometry on the widget (e.g. with `gtk_widget_set_usize()`), in which case it returns that geometry instead of the widget's requisition.

This function differs from `gtk_widget_size_request()` in that it retrieves the last size request value from `widget->requisition`, while `gtk_widget_size_request()` actually calls the "size_request" method on `widget` to compute the size request and fill in `widget->requisition`, and only then returns `widget->requisition`.

Because this function does not call the "size_request" method, it can only be used when you know that `widget->requisition` is up-to-date, that is, `gtk_widget_size_request()` has been called since the last time a resize was queued. In general, only container implementations have this information; applications should use `gtk_widget_size_request()`.

`widget` : | a GtkWidget
`requisition` : | a GtkRequisition to be filled in

### gtk_widget_size_allocate ()

    void        gtk_widget_size_allocate        (GtkWidget *widget,
                                                 GtkAllocation *allocation);

This function is only used by GtkContainer subclasses, to assign a size and position to their child widgets.

`widget` : | a GtkWidget
`allocation` : | position and size to be allocated to `widget`

### gtk_widget_add_accelerator ()

    void        gtk_widget_add_accelerator      (GtkWidget *widget,
                                                 const gchar *accel_signal,
                                                 GtkAccelGroup *accel_group,
                                                 guint accel_key,
                                                 GdkModifierType accel_mods,
                                                 GtkAccelFlags accel_flags);

Installs an accelerator for this `widget` in `accel_group` that causes `accel_signal` to be emitted if the accelerator is activated. The `accel_group` needs to be added to the widget's toplevel via `gtk_window_add_accel_group()`, and the signal must be of type `G_RUN_ACTION`. Accelerators added through this function are not user changeable during runtime. If you want to support accelerators that can be changed by the user, use `gtk_accel_map_add_entry()` and `gtk_widget_set_accel_path()` or `gtk_menu_item_set_accel_path()` instead.

`widget` : | widget to install an accelerator on
`accel_signal` : | widget signal to emit on accelerator activation
`accel_group` : | accel group for this widget, added to its toplevel
`accel_key` : | GDK keyval of the accelerator
`accel_mods` : | modifier key combination of the accelerator
`accel_flags` : | flag accelerators, e.g. `GTK_ACCEL_VISIBLE`

### gtk_widget_remove_accelerator ()

    gboolean    gtk_widget_remove_accelerator   (GtkWidget *widget,
                                                 GtkAccelGroup *accel_group,
                                                 guint accel_key,
                                                 GdkModifierType accel_mods);

Removes an accelerator from `widget`, previously installed with `gtk_widget_add_accelerator()`.

`widget` : | widget to install an accelerator on
`accel_group` : | accel group for this widget
`accel_key` : | GDK keyval of the accelerator
`accel_mods` : | modifier key combination of the accelerator
Returns : | whether an accelerator was installed and could be removed

### gtk_widget_set_accel_path ()

    void        gtk_widget_set_accel_path       (GtkWidget *widget,
                                                 const gchar *accel_path,
                                                 GtkAccelGroup *accel_group);

Given an accelerator group, `accel_group`, and an accelerator path, `accel_path`, sets up an accelerator in `accel_group` so whenever the key binding that is defined for `accel_path` is pressed, `widget` will be activated. This removes any accelerators (for any accelerator group) installed by previous calls to `gtk_widget_set_accel_path()`. Associating accelerators with paths allows them to be modified by the user and the modifications to be saved for future use. (See `gtk_accel_map_save()`.)

This function is a low level function that would most likely be used by a menu creation system like GtkItemFactory. If you use GtkItemFactory, setting up accelerator paths will be done automatically.

Even when you you aren't using GtkItemFactory, if you only want to set up accelerators on menu items `gtk_menu_item_set_accel_path()` provides a somewhat more convenient interface.

`widget` : | a GtkWidget
`accel_path` : | path used to look up the the accelerator
`accel_group` : | a GtkAccelGroup.

### gtk_widget_list_accel_closures ()

    GList*      gtk_widget_list_accel_closures  (GtkWidget *widget);

Lists the closures used by `widget` for accelerator group connections with `gtk_accel_group_connect_by_path()` or `gtk_accel_group_connect()`. The closures can be used to monitor accelerator changes on `widget`, by connecting to the ::accel_changed signal of the GtkAccelGroup of a closure which can be found out with `gtk_accel_group_from_accel_closure()`.

`widget` : | widget to list accelerator closures for
Returns : | a newly allocated GList of closures

### gtk_widget_event ()

    gboolean    gtk_widget_event                (GtkWidget *widget,
                                                 GdkEvent *event);

Rarely-used function. This function is used to emit the event signals on a widget (those signals should never be emitted without using this function to do so). If you want to synthesize an event though, don't use this function; instead, use `gtk_main_do_event()` so the event will behave as if it were in the event queue. Don't synthesize expose events; instead, use `gdk_window_invalidate_rect()` to invalidate a region of the window.

`widget` : | a GtkWidget
`event` : | a GdkEvent
Returns : | return from the event signal emission (`TRUE` if the event was handled)

### gtk_widget_activate ()

    gboolean    gtk_widget_activate             (GtkWidget *widget);

For widgets that can be "activated" (buttons, menu items, etc.) this function activates them. Activation is what happens when you press Enter on a widget during key navigation; clicking a button, selecting a menu item, etc. If `widget` isn't activatable, the function returns `FALSE`.

`widget` : | a GtkWidget that's activatable
Returns : | `TRUE` if the widget was activatable

### gtk_widget_reparent ()

    void        gtk_widget_reparent             (GtkWidget *widget,
                                                 GtkWidget *new_parent);

Moves a widget from one GtkContainer to another, handling reference count issues to avoid destroying the widget.

`widget` : | a GtkWidget
`new_parent` : | a GtkContainer to move the widget into

### gtk_widget_intersect ()

    gboolean    gtk_widget_intersect            (GtkWidget *widget,
                                                 GdkRectangle *area,
                                                 GdkRectangle *intersection);

Computes the intersection of a `widget`'s area and `area`, storing the intersection in `intersection`, and returns `TRUE` if there was an intersection. `intersection` may be `NULL` if you're only interested in whether there was an intersection.

`widget` : | a GtkWidget
`area` : | a rectangle
`intersection` : | rectangle to store intersection of `widget` and `area`
Returns : | `TRUE` if there was an intersection

### gtk_widget_is_focus ()

    gboolean    gtk_widget_is_focus             (GtkWidget *widget);

Determines if the widget is the focus widget within its toplevel. (This does not mean that the `HAS_FOCUS` flag is necessarily set; `HAS_FOCUS` will only be set if the toplevel widget additionally has the global input focus.)

`widget` : | a GtkWidget
Returns : | `TRUE` if the widget is the focus widget.

### gtk_widget_grab_focus ()

    void        gtk_widget_grab_focus           (GtkWidget *widget);

Causes `widget` to have the keyboard focus for the GtkWindow it's inside. `widget` must be a focusable widget, such as a GtkEntry; something like GtkFrame won't work. (More precisely, it must have the `GTK_CAN_FOCUS` flag set.)

`widget` : | a GtkWidget

### gtk_widget_grab_default ()

    void        gtk_widget_grab_default         (GtkWidget *widget);

Causes `widget` to become the default widget. `widget` must have the `GTK_CAN_DEFAULT` flag set; typically you have to set this flag yourself by calling `GTK_WIDGET_SET_FLAGS (`widget`, GTK_CAN_DEFAULT)`. The default widget is activated when the user presses Enter in a window. Default widgets must be activatable, that is, `gtk_widget_activate()` should affect them.

`widget` : | a GtkWidget

### gtk_widget_set_name ()

    void        gtk_widget_set_name             (GtkWidget *widget,
                                                 const gchar *name);

Widgets can be named, which allows you to refer to them from a gtkrc file. You can apply a style to widgets with a particular name in the gtkrc file. See the documentation for gtkrc files (on the same page as the docs for GtkRcStyle).

`widget` : | a GtkWidget
`name` : | name for the widget

### gtk_widget_get_name ()

    G_CONST_RETURN gchar* gtk_widget_get_name   (GtkWidget *widget);

Retrieves the name of a widget. See `gtk_widget_set_name()` for the significance of widget names.

`widget` : | a GtkWidget
Returns : | name of the widget. This string is owned by GTK+ and should not be modified or freed

### gtk_widget_set_state ()

    void        gtk_widget_set_state            (GtkWidget *widget,
                                                 GtkStateType state);

This function is for use in widget implementations. Sets the state of a widget (insensitive, prelighted, etc.) Usually you should set the state using wrapper functions such as `gtk_widget_set_sensitive()`.

`widget` : | a GtkWidget
`state` : | new state for `widget`

### gtk_widget_set_sensitive ()

    void        gtk_widget_set_sensitive        (GtkWidget *widget,
                                                 gboolean sensitive);

Sets the sensitivity of a widget. A widget is sensitive if the user can interact with it. Insensitive widgets are "grayed out" and the user can't interact with them. Insensitive widgets are known as "inactive", "disabled", or "ghosted" in some other toolkits.

`widget` : | a GtkWidget
`sensitive` : | `TRUE` to make the widget sensitive

### gtk_widget_set_parent ()

    void        gtk_widget_set_parent           (GtkWidget *widget,
                                                 GtkWidget *parent);

This function is useful only when implementing subclasses of GtkContainer. Sets the container as the parent of `widget`, and takes care of some details such as updating the state and style of the child to reflect its new location. The opposite function is `gtk_widget_unparent()`.

`widget` : | a GtkWidget
`parent` : | parent container

### gtk_widget_set_parent_window ()

    void        gtk_widget_set_parent_window    (GtkWidget *widget,
                                                 GdkWindow *parent_window);

Sets a non default parent window for `widget`.

`widget` : | a GtkWidget.
`parent_window` : | the new parent window.

### gtk_widget_get_parent_window ()

    GdkWindow*  gtk_widget_get_parent_window    (GtkWidget *widget);

Gets `widget`'s parent window.

`widget` : | a GtkWidget.
Returns : | the parent window of `widget`.

### gtk_widget_set_uposition ()

    void        gtk_widget_set_uposition        (GtkWidget *widget,
                                                 gint x,
                                                 gint y);

### Warning

`gtk_widget_set_uposition` is deprecated and should not be used in newly-written code.

Sets the position of a widget. The funny "u" in the name comes from the "user position" hint specified by the X Window System, and exists for legacy reasons. This function doesn't work if a widget is inside a container; it's only really useful on GtkWindow.

Don't use this function to center dialogs over the main application window; most window managers will do the centering on your behalf if you call `gtk_window_set_transient_for()`, and it's really not possible to get the centering to work correctly in all cases from application code. But if you insist, use `gtk_window_set_position()` to set GTK_WIN_POS_CENTER_ON_PARENT, don't do the centering manually.

Note that although `x` and `y` can be individually unset, the position is not honoured unless both `x` and `y` are set.

`widget` : | a GtkWidget
`x` : | x position; -1 to unset x; -2 to leave x unchanged
`y` : | y position; -1 to unset y; -2 to leave y unchanged

### gtk_widget_set_usize ()

    void        gtk_widget_set_usize            (GtkWidget *widget,
                                                 gint width,
                                                 gint height);

### Warning

`gtk_widget_set_usize` is deprecated and should not be used in newly-written code.

This function is deprecated; use `gtk_widget_set_size_request()` instead.

Sets the minimum size of a widget; that is, the widget's size request will be `width` by `height`. You can use this function to force a widget to be either larger or smaller than it is. The strange "usize" name dates from the early days of GTK+, and derives from X Window System terminology. In many cases, `gtk_window_set_default_size()` is a better choice for toplevel windows than this function; setting the default size will still allow users to shrink the window. Setting the usize will force them to leave the window at least as large as the usize. When dealing with window sizes, `gtk_window_set_geometry_hints()` can be a useful function as well.

Note the inherent danger of setting any fixed size - themes, translations into other languages, different fonts, and user action can all change the appropriate size for a given widget. So, it's basically impossible to hardcode a size that will always be correct.

`widget` : | a GtkWidget
`width` : | minimum width, or -1 to unset
`height` : | minimum height, or -1 to unset

### gtk_widget_set_events ()

    void        gtk_widget_set_events           (GtkWidget *widget,
                                                 gint events);

Sets the event mask (see GdkEventMask) for a widget. The event mask determines which events a widget will receive. Keep in mind that different widgets have different default event masks, and by changing the event mask you may disrupt a widget's functionality, so be careful. This function must be called while a widget is unrealized. Consider `gtk_widget_add_events()` for widgets that are already realized, or if you want to preserve the existing event mask. This function can't be used with GTK_NO_WINDOW widgets; to get events on those widgets, place them inside a GtkEventBox and receive events on the event box.

`widget` : | a GtkWidget
`events` : | event mask

### gtk_widget_add_events ()

    void        gtk_widget_add_events           (GtkWidget *widget,
                                                 gint events);

Adds the events in the bitfield `events` to the event mask for `widget`. See `gtk_widget_set_events()` for details.

`widget` : | a GtkWidget
`events` : | an event mask, see GdkEventMask

### gtk_widget_set_extension_events ()

    void        gtk_widget_set_extension_events (GtkWidget *widget,
                                                 GdkExtensionMode mode);

Sets the extension events mask to `mode`. See GdkExtensionMode and `gdk_input_set_extension_events()`.

`widget` : | a GtkWidget
`mode` : | bitfield of extension events to receive

### gtk_widget_get_extension_events ()

    GdkExtensionMode gtk_widget_get_extension_events
                                                (GtkWidget *widget);

Retrieves the extension events the widget will receive; see `gdk_input_set_extension_events()`.

`widget` : | a GtkWidget
Returns : | extension events for `widget`

### gtk_widget_get_toplevel ()

    GtkWidget*  gtk_widget_get_toplevel         (GtkWidget *widget);

This function returns the topmost widget in the container hierarchy `widget` is a part of. If `widget` has no parent widgets, it will be returned as the topmost widget. No reference will be added to the returned widget; it should not be unreferenced.

Note the difference in behavior vs. `gtk_widget_get_ancestor()`; `gtk_widget_get_ancestor (widget, GTK_TYPE_WINDOW)` would return `NULL` if `widget` wasn't inside a toplevel window, and if the window was inside a GtkWindow-derived widget which was in turn inside the toplevel GtkWindow. While the second case may seem unlikely, it actually happens when a GtkPlug is embedded inside a GtkSocket within the same application.

To reliably find the toplevel GtkWindow, use `gtk_widget_get_toplevel()` and check if the `TOPLEVEL` flags is set on the result.

     GtkWidget *toplevel = gtk_widget_get_toplevel (widget);
     if (GTK_WIDGET_TOPLEVEL (toplevel))
       {
         [ Perform action on toplevel. ]
       }

`widget` : | a GtkWidget
Returns : | the topmost ancestor of `widget`, or `widget` itself if there's no ancestor.

### gtk_widget_get_ancestor ()

    GtkWidget*  gtk_widget_get_ancestor         (GtkWidget *widget,
                                                 GType widget_type);

Gets the first ancestor of `widget` with type `widget_type`. For example, `gtk_widget_get_ancestor (widget, GTK_TYPE_BOX)` gets the first GtkBox that's an ancestor of `widget`. No reference will be added to the returned widget; it should not be unreferenced. See note about checking for a toplevel GtkWindow in the docs for `gtk_widget_get_toplevel()`.

Note that unlike `gtk_widget_is_ancestor()`, `gtk_widget_get_ancestor()` considers `widget` to be an ancestor of itself.

`widget` : | a GtkWidget
`widget_type` : | ancestor type
Returns : | the ancestor widget, or `NULL` if not found

### gtk_widget_get_colormap ()

    GdkColormap* gtk_widget_get_colormap        (GtkWidget *widget);

Gets the colormap that will be used to render `widget`. No reference will be added to the returned colormap; it should not be unreferenced.

`widget` : | a GtkWidget
Returns : | the colormap used by `widget`

### gtk_widget_set_colormap ()

    void        gtk_widget_set_colormap         (GtkWidget *widget,
                                                 GdkColormap *colormap);

Sets the colormap for the widget to the given value. Widget must not have been previously realized. This probably should only be used from an ``init()`` function (i.e. from the constructor for the widget).

`widget` : | a GtkWidget
`colormap` : | a colormap

### gtk_widget_get_visual ()

    GdkVisual*  gtk_widget_get_visual           (GtkWidget *widget);

Gets the visual that will be used to render `widget`.

`widget` : | a GtkWidget
Returns : | the visual for `widget`

### gtk_widget_get_events ()

    gint        gtk_widget_get_events           (GtkWidget *widget);

Returns the event mask for the widget (a bitfield containing flags from the GdkEventMask enumeration). These are the events that the widget will receive.

`widget` : | a GtkWidget
Returns : | event mask for `widget`

### gtk_widget_get_pointer ()

    void        gtk_widget_get_pointer          (GtkWidget *widget,
                                                 gint *x,
                                                 gint *y);

Obtains the location of the mouse pointer in widget coordinates. Widget coordinates are a bit odd; for historical reasons, they are defined as `widget->window` coordinates for widgets that are not GTK_NO_WINDOW widgets, and are relative to `widget->allocation.x`, `widget->allocation.y` for widgets that are GTK_NO_WINDOW widgets.

`widget` : | a GtkWidget
`x` : | return location for the X coordinate, or `NULL`
`y` : | return location for the Y coordinate, or `NULL`

### gtk_widget_is_ancestor ()

    gboolean    gtk_widget_is_ancestor          (GtkWidget *widget,
                                                 GtkWidget *ancestor);

Determines whether `widget` is somewhere inside `ancestor`, possibly with intermediate containers.

`widget` : | a GtkWidget
`ancestor` : | another GtkWidget
Returns : | `TRUE` if `ancestor` contains `widget` as a child, grandchild, great grandchild, etc.

### gtk_widget_translate_coordinates ()

    gboolean    gtk_widget_translate_coordinates
                                                (GtkWidget *src_widget,
                                                 GtkWidget *dest_widget,
                                                 gint src_x,
                                                 gint src_y,
                                                 gint *dest_x,
                                                 gint *dest_y);

Translate coordinates relative to `src_widget`'s allocation to coordinates relative to `dest_widget`'s allocations. In order to perform this operation, both widgets must be realized, and must share a common toplevel.

`src_widget` : | a GtkWidget
`dest_widget` : | a GtkWidget
`src_x` : | X position relative to `src_widget`
`src_y` : | Y position relative to `src_widget`
`dest_x` : | location to store X position relative to `dest_widget`
`dest_y` : | location to store Y position relative to `dest_widget`
Returns : | `FALSE` if either widget was not realized, or there was no common ancestor. In this case, nothing is stored in *`dest_x` and *`dest_y`. Otherwise `TRUE`.

### gtk_widget_hide_on_delete ()

    gboolean    gtk_widget_hide_on_delete       (GtkWidget *widget);

Utility function; intended to be connected to the "delete_event" signal on a GtkWindow. The function calls `gtk_widget_hide()` on its argument, then returns `TRUE`. If connected to "delete_event", the result is that clicking the close button for a window (on the window frame, top right corner usually) will hide but not destroy the window. By default, GTK+ destroys windows when "delete_event" is received.

`widget` : | a GtkWidget
Returns : | `TRUE`

### gtk_widget_set_style ()

    void        gtk_widget_set_style            (GtkWidget *widget,
                                                 GtkStyle *style);

Sets the GtkStyle for a widget (`widget->style`). You probably don't want to use this function; it interacts badly with themes, because themes work by replacing the GtkStyle. Instead, use `gtk_widget_modify_style()`.

`widget` : | a GtkWidget
`style` : | a GtkStyle, or `NULL` to remove the effect of a previous `gtk_widget_set_style()` and go back to the default style

### gtk_widget_set_rc_style()

    #define gtk_widget_set_rc_style(widget)          (gtk_widget_set_style (widget, NULL))

### Warning

`gtk_widget_set_rc_style` is deprecated and should not be used in newly-written code.

Equivalent to `gtk_widget_set_style (widget, NULL)`.

`widget` : | a GtkWidget.

### gtk_widget_ensure_style ()

    void        gtk_widget_ensure_style         (GtkWidget *widget);

Ensures that `widget` has a style (`widget->style`). Not a very useful function; most of the time, if you want the style, the widget is realized, and realized widgets are guaranteed to have a style already.

`widget` : | a GtkWidget

### gtk_widget_get_style ()

    GtkStyle*   gtk_widget_get_style            (GtkWidget *widget);

Simply an accessor function that returns `widget->style`.

`widget` : | a GtkWidget
Returns : | the widget's GtkStyle

### gtk_widget_restore_default_style()

    #define gtk_widget_restore_default_style(widget) (gtk_widget_set_style (widget, NULL))

### Warning

`gtk_widget_restore_default_style` is deprecated and should not be used in newly-written code.

Equivalent to `gtk_widget_set_style (widget, NULL)`.

`widget` : | a GtkWidget.

### gtk_widget_reset_rc_styles ()

    void        gtk_widget_reset_rc_styles      (GtkWidget *widget);

Reset the styles of `widget` and all descendents, so when they are looked up again, they get the correct values for the currently loaded RC file settings.

This function is not useful for applications.

`widget` : | a GtkWidget.

### gtk_widget_push_colormap ()

    void        gtk_widget_push_colormap        (GdkColormap *cmap);

Pushes `cmap` onto a global stack of colormaps; the topmost colormap on the stack will be used to create all widgets. Remove `cmap` with `gtk_widget_pop_colormap()`. There's little reason to use this function.

`cmap` : | a GdkColormap

### gtk_widget_pop_colormap ()

    void        gtk_widget_pop_colormap         (void);

Removes a colormap pushed with `gtk_widget_push_colormap()`.

### gtk_widget_set_default_colormap ()

    void        gtk_widget_set_default_colormap (GdkColormap *colormap);

Sets the default colormap to use when creating widgets. `gtk_widget_push_colormap()` is a better function to use if you only want to affect a few widgets, rather than all widgets.

`colormap` : | a GdkColormap

### gtk_widget_get_default_style ()

    GtkStyle*   gtk_widget_get_default_style    (void);

Returns the default style used by all widgets initially.

Returns : | the default style. This GtkStyle object is owned by GTK+ and should not be modified or freed.

### gtk_widget_get_default_colormap ()

    GdkColormap* gtk_widget_get_default_colormap
                                                (void);

Obtains the default colormap used to create widgets.

Returns : | default widget colormap

### gtk_widget_get_default_visual ()

    GdkVisual*  gtk_widget_get_default_visual   (void);

Obtains the visual of the default colormap. Not really useful; used to be useful before `gdk_colormap_get_visual()` existed.

Returns : | visual of the default colormap

### gtk_widget_set_direction ()

    void        gtk_widget_set_direction        (GtkWidget *widget,
                                                 GtkTextDirection dir);

Sets the reading direction on a particular widget. This direction controls the primary direction for widgets containing text, and also the direction in which the children of a container are packed. The ability to set the direction is present in order so that correct localization into languages with right-to-left reading directions can be done. Generally, applications will let the default reading direction present, except for containers where the containers are arranged in an order that is explicitely visual rather than logical (such as buttons for text justification).

If the direction is set to `GTK_TEXT_DIR_NONE`, then the value set by `gtk_widget_set_default_direction()` will be used.

`widget` : | a GtkWidget
`dir` : | the new direction

### enum GtkTextDirection

    typedef enum
    {
      GTK_TEXT_DIR_NONE,
      GTK_TEXT_DIR_LTR,
      GTK_TEXT_DIR_RTL
    } GtkTextDirection;

### gtk_widget_get_direction ()

    GtkTextDirection gtk_widget_get_direction   (GtkWidget *widget);

Gets the reading direction for a particular widget. See `gtk_widget_set_direction()`.

`widget` : | a GtkWidget
Returns : | the reading direction for the widget.

### gtk_widget_set_default_direction ()

    void        gtk_widget_set_default_direction
                                                (GtkTextDirection dir);

Sets the default reading direction for widgets where the direction has not been explicitly set by `gtk_widget_set_direction()`.

`dir` : | the new default direction. This cannot be `GTK_TEXT_DIR_NONE`.

### gtk_widget_get_default_direction ()

    GtkTextDirection gtk_widget_get_default_direction
                                                (void);

Obtains the current default reading direction. See `gtk_widget_set_default_direction()`.

Returns : | the current default direction.

### gtk_widget_shape_combine_mask ()

    void        gtk_widget_shape_combine_mask   (GtkWidget *widget,
                                                 GdkBitmap *shape_mask,
                                                 gint offset_x,
                                                 gint offset_y);

Sets a shape for this widget's GDK window. This allows for transparent windows etc., see `gdk_window_shape_combine_mask()` for more information.

`widget` : | a GtkWidget.
`shape_mask` : | shape to be added, or `NULL` to remove an existing shape.
`offset_x` : | X position of shape mask with respect to `window`.
`offset_y` : | Y position of shape mask with respect to `window`.

### gtk_widget_path ()

    void        gtk_widget_path                 (GtkWidget *widget,
                                                 guint *path_length,
                                                 gchar **path,
                                                 gchar **path_reversed);

Obtains the full path to `widget`. The path is simply the name of a widget and all its parents in the container hierarchy, separated by periods. The name of a widget comes from `gtk_widget_get_name()`. Paths are used to apply styles to a widget in gtkrc configuration files. Widget names are the type of the widget by default (e.g. "GtkButton") or can be set to an application-specific value with `gtk_widget_set_name()`. By setting the name of a widget, you allow users or theme authors to apply styles to that specific widget in their gtkrc file. `path_reversed_p` fills in the path in reverse order, i.e. starting with `widget`'s name instead of starting with the name of `widget`'s outermost ancestor.

`widget` : | a GtkWidget
`path_length` : | location to store length of the path, or `NULL`
`path` : | location to store allocated path string, or `NULL`
`path_reversed` : | location to store allocated reverse path string, or `NULL`

### gtk_widget_class_path ()

    void        gtk_widget_class_path           (GtkWidget *widget,
                                                 guint *path_length,
                                                 gchar **path,
                                                 gchar **path_reversed);

Same as `gtk_widget_path()`, but always uses the name of a widget's type, never uses a custom name set with `gtk_widget_set_name()`.

`widget` : | a GtkWidget
`path_length` : | location to store the length of the class path, or `NULL`
`path` : | location to store the class path as an allocated string, or `NULL`
`path_reversed` : | location to store the reverse class path as an allocated string, or `NULL`

### gtk_widget_get_composite_name ()

    gchar*      gtk_widget_get_composite_name   (GtkWidget *widget);

Obtains the composite name of a widget.

`widget` : | a GtkWidget.
Returns : | the composite name of `widget`, or `NULL` if `widget` is not a composite child. The string should not be freed when it is no longer needed.

### gtk_widget_modify_style ()

    void        gtk_widget_modify_style         (GtkWidget *widget,
                                                 GtkRcStyle *style);

Modifies style values on the widget. Modifications made using this technique take precedence over style values set via an RC file, however, they will be overriden if a style is explicitely set on the widget using `gtk_widget_set_style()`. The GtkRcStyle structure is designed so each field can either be set or unset, so it is possible, using this function, to modify some style values and leave the others unchanged.

Note that modifications made with this function are not cumulative with previous calls to `gtk_widget_modify_style()` or with such functions as `gtk_widget_modify_fg()`. If you wish to retain previous values, you must first call `gtk_widget_get_modifier_style()`, make your modifications to the returned style, then call `gtk_widget_modify_style()` with that style. On the other hand, if you first call `gtk_widget_modify_style()`, subsequent calls to such functions `gtk_widget_modify_fg()` will have a cumulative effect with the initial modifications.

`widget` : | a GtkWidget
`style` : | the GtkRcStyle holding the style modifications

### gtk_widget_get_modifier_style ()

    GtkRcStyle* gtk_widget_get_modifier_style   (GtkWidget *widget);

Returns the current modifier style for the widget. (As set by `gtk_widget_modify_style()`.) If no style has previously set, a new GtkRcStyle will be created with all values unset, and set as the modifier style for the widget. If you make changes to this rc style, you must call `gtk_widget_modify_style()`, passing in the returned rc style, to make sure that your changes take effect.

Caution: passing the style back to `gtk_widget_modify_style()` will normally end up destroying it, because `gtk_widget_modify_style()` copies the passed-in style and sets the copy as the new modifier style, thus dropping any reference to the old modifier style. Add a reference to the modifier style if you want to keep it alive.

`widget` : | a GtkWidget
Returns : | the modifier style for the widget. This rc style is owned by the widget. If you want to keep a pointer to value this around, you must add a refcount using `gtk_rc_style_ref()`.

### gtk_widget_modify_fg ()

    void        gtk_widget_modify_fg            (GtkWidget *widget,
                                                 GtkStateType state,
                                                 GdkColor *color);

Sets the foreground color for a widget in a particular state. All other style values are left untouched. See also `gtk_widget_modify_style()`.

`widget` : | a GtkWidget.
`state` : | the state for which to set the foreground color.
`color` : | the color to assign (does not need to be allocated), or `NULL` to undo the effect of previous calls to of `gtk_widget_modify_fg()`.

### gtk_widget_modify_bg ()

    void        gtk_widget_modify_bg            (GtkWidget *widget,
                                                 GtkStateType state,
                                                 GdkColor *color);

Sets the background color for a widget in a particular state. All other style values are left untouched. See also `gtk_widget_modify_style()`.

`widget` : | a GtkWidget.
`state` : | the state for which to set the background color.
`color` : | the color to assign (does not need to be allocated), or `NULL` to undo the effect of previous calls to of `gtk_widget_modify_bg()`.

### gtk_widget_modify_text ()

    void        gtk_widget_modify_text          (GtkWidget *widget,
                                                 GtkStateType state,
                                                 GdkColor *color);

Sets the text color for a widget in a particular state. All other style values are left untouched. The text color is the foreground color used along with the base color (see `gtk_widget_modify_base()`) for widgets such as GtkEntry and GtkTextView. See also `gtk_widget_modify_style()`.

`widget` : | a GtkWidget.
`state` : | the state for which to set the text color.
`color` : | the color to assign (does not need to be allocated), or `NULL` to undo the effect of previous calls to of `gtk_widget_modify_text()`.

### gtk_widget_modify_base ()

    void        gtk_widget_modify_base          (GtkWidget *widget,
                                                 GtkStateType state,
                                                 GdkColor *color);

Sets the base color for a widget in a particular state. All other style values are left untouched. The base color is the background color used along with the text color (see `gtk_widget_modify_text()`) for widgets such as GtkEntry and GtkTextView. See also `gtk_widget_modify_style()`.

`widget` : | a GtkWidget.
`state` : | the state for which to set the base color.
`color` : | the color to assign (does not need to be allocated), or `NULL` to undo the effect of previous calls to of `gtk_widget_modify_base()`.

### gtk_widget_modify_font ()

    void        gtk_widget_modify_font          (GtkWidget *widget,
                                                 PangoFontDescription *font_desc);

Sets the font to use for a widget. All other style values are left untouched. See also `gtk_widget_modify_style()`.

`widget` : | a GtkWidget
`font_desc` : | the font description to use, or `NULL` to undo the effect of previous calls to `gtk_widget_modify_font()`.

### gtk_widget_create_pango_context ()

    PangoContext* gtk_widget_create_pango_context
                                                (GtkWidget *widget);

Creates a new PangoContext with the appropriate colormap, font description, and base direction for drawing text for this widget. See also `gtk_widget_get_pango_context()`.

`widget` : | a GtkWidget
Returns : | the new PangoContext

### gtk_widget_get_pango_context ()

    PangoContext* gtk_widget_get_pango_context  (GtkWidget *widget);

Gets a PangoContext with the appropriate colormap, font description and base direction for this widget. Unlike the context returned by `gtk_widget_create_pango_context()`, this context is owned by the widget (it can be used until the screen for the widget changes or the widget is removed from its toplevel), and will be updated to match any changes to the widget's attributes.

If you create and keep a PangoLayout using this context, you must deal with changes to the context by calling `pango_layout_context_changed()` on the layout in response to the ::style_set and ::direction_set signals for the widget.

`widget` : | a GtkWidget
Returns : | the PangoContext for the widget.

### gtk_widget_create_pango_layout ()

    PangoLayout* gtk_widget_create_pango_layout (GtkWidget *widget,
                                                 const gchar *text);

Creates a new PangoLayout with the appropriate colormap, font description, and base direction for drawing text for this widget.

If you keep a PangoLayout created in this way around, in order notify the layout of changes to the base direction or font of this widget, you must call `pango_layout_context_changed()` in response to the ::style_set and ::direction_set signals for the widget.

`widget` : | a GtkWidget
`text` : | text to set on the layout (can be `NULL`)
Returns : | the new PangoLayout

### gtk_widget_render_icon ()

    GdkPixbuf*  gtk_widget_render_icon          (GtkWidget *widget,
                                                 const gchar *stock_id,
                                                 GtkIconSize size,
                                                 const gchar *detail);

A convenience function that uses the theme engine and RC file settings for `widget` to look up `stock_id` and render it to a pixbuf. `stock_id` should be a stock icon ID such as GTK_STOCK_OPEN or GTK_STOCK_OK. `size` should be a size such as GTK_ICON_SIZE_MENU. `detail` should be a string that identifies the widget or code doing the rendering, so that theme engines can special-case rendering for that widget or code.

The pixels in the returned GdkPixbuf are shared with the rest of the application and should not be modified. The pixbuf should be freed after use with `g_object_unref()`.

`widget` : | a GtkWidget
`stock_id` : | a stock ID
`size` : | a stock size
`detail` : | render detail to pass to theme engine
Returns : | a new pixbuf, or `NULL` if the stock ID wasn't known

### gtk_widget_pop_composite_child ()

    void        gtk_widget_pop_composite_child  (void);

Cancels the effect of a previous call to `gtk_widget_push_composite_child()`.

### gtk_widget_push_composite_child ()

    void        gtk_widget_push_composite_child (void);

Makes all newly-created widgets as composite children until the corresponding `gtk_widget_pop_composite_child()` call.

A composite child is a child that's an implementation detail of the container it's inside and should not be visible to people using the container. Composite children aren't treated differently by GTK (but see `gtk_container_foreach()` vs. `gtk_container_forall()`), but e.g. GUI builders might want to treat them in a different way.

Here is a simple example:

      gtk_widget_push_composite_child ();
      scrolled_window->hscrollbar = gtk_hscrollbar_new (hadjustment);
      gtk_widget_set_composite_name (scrolled_window->hscrollbar, "hscrollbar");
      gtk_widget_pop_composite_child ();
      gtk_widget_set_parent (scrolled_window->hscrollbar,
                             GTK_WIDGET (scrolled_window));
      g_object_ref (scrolled_window->hscrollbar);

### gtk_widget_queue_clear ()

    void        gtk_widget_queue_clear          (GtkWidget *widget);

### Warning

`gtk_widget_queue_clear` is deprecated and should not be used in newly-written code.

DEPRECATED. Use `gtk_widget_queue_draw()` instead.

`widget` : | a GtkWidget

### gtk_widget_queue_clear_area ()

    void        gtk_widget_queue_clear_area     (GtkWidget *widget,
                                                 gint x,
                                                 gint y,
                                                 gint width,
                                                 gint height);

### Warning

`gtk_widget_queue_clear_area` is deprecated and should not be used in newly-written code.

DEPRECATED. This function is no longer different from `gtk_widget_queue_draw_area()`, though it once was. Now it just calls `gtk_widget_queue_draw_area()`. Originally `gtk_widget_queue_clear_area()` would force a redraw of the background for `GTK_NO_WINDOW` widgets, and `gtk_widget_queue_draw_area()` would not. Now both functions ensure the background will be redrawn.

`widget` : | a GtkWidget
`x` : | x coordinate of upper-left corner of rectangle to redraw
`y` : | y coordinate of upper-left corner of rectangle to redraw
`width` : | width of region to draw
`height` : | height of region to draw

### gtk_widget_queue_draw_area ()

    void        gtk_widget_queue_draw_area      (GtkWidget *widget,
                                                 gint x,
                                                 gint y,
                                                 gint width,
                                                 gint height);

Invalidates the rectangular area of `widget` defined by `x`, `y`, `width` and `height` by calling `gdk_window_invalidate_rect()` on the widget's window and all its child windows. Once the main loop becomes idle (after the current batch of events has been processed, roughly), the window will receive expose events for the union of all regions that have been invalidated.

Normally you would only use this function in widget implementations. You might also use it, or `gdk_window_invalidate_rect()` directly, to schedule a redraw of a GtkDrawingArea or some portion thereof.

Frequently you can just call `gdk_window_invalidate_rect()` or `gdk_window_invalidate_region()` instead of this function. Those functions will invalidate only a single window, instead of the widget and all its children.

The advantage of adding to the invalidated region compared to simply drawing immediately is efficiency; using an invalid region ensures that you only have to redraw one time.

`widget` : | a GtkWidget
`x` : | x coordinate of upper-left corner of rectangle to redraw
`y` : | y coordinate of upper-left corner of rectangle to redraw
`width` : | width of region to draw
`height` : | height of region to draw

### gtk_widget_reset_shapes ()

    void        gtk_widget_reset_shapes         (GtkWidget *widget);

Recursively resets the shape on this widget and its descendants.

`widget` : | a GtkWidget.

### gtk_widget_set_app_paintable ()

    void        gtk_widget_set_app_paintable    (GtkWidget *widget,
                                                 gboolean app_paintable);

`widget` : |
`app_paintable` : |

### gtk_widget_set_double_buffered ()

    void        gtk_widget_set_double_buffered  (GtkWidget *widget,
                                                 gboolean double_buffered);

Widgets are double buffered by default; you can use this function to turn off the buffering. "Double buffered" simply means that `gdk_window_begin_paint_region()` and `gdk_window_end_paint()` are called automatically around expose events sent to the widget. `gdk_window_begin_paint()` diverts all drawing to a widget's window to an offscreen buffer, and `gdk_window_end_paint()` draws the buffer to the screen. The result is that users see the window update in one smooth step, and don't see individual graphics primitives being rendered.

In very simple terms, double buffered widgets don't flicker, so you would only use this function to turn off double buffering if you had special needs and really knew what you were doing.

`widget` : | a GtkWidget
`double_buffered` : | `TRUE` to double-buffer a widget

### gtk_widget_set_redraw_on_allocate ()

    void        gtk_widget_set_redraw_on_allocate
                                                (GtkWidget *widget,
                                                 gboolean redraw_on_allocate);

Sets whether a when a widgets size allocation changes, the entire widget is queued for drawing. By default, this setting is `TRUE` and the entire widget is redrawn on every size change. If your widget leaves the upper left are unchanged when made bigger, turning this setting on will improve performance.

Note that for `NO_WINDOW` widgets setting this flag to `FALSE` turns off all allocation on resizing: the widget will not even redraw if its position changes; this is to allow containers that don't draw anything to avoid excess invalidations. If you set this flag on a `NO_WINDOW` widget that does draw on `widget->window`, you are responsible for invalidating both the old and new allocation of the widget when the widget is moved and responsible for invalidating regions newly when the widget increases size.

`widget` : | a GtkWidget
`redraw_on_allocate` : | if `TRUE`, the entire widget will be redrawn when it is allocated to a new size. Otherwise, only the new portion of the widget will be redrawn.

### gtk_widget_set_composite_name ()

    void        gtk_widget_set_composite_name   (GtkWidget *widget,
                                                 const gchar *name);

Sets a widgets composite name. The widget must be a composite child of its parent; see `gtk_widget_push_composite_child()`.

`widget` : | a GtkWidget.
`name` : | the name to set.

### gtk_widget_set_scroll_adjustments ()

    gboolean    gtk_widget_set_scroll_adjustments
                                                (GtkWidget *widget,
                                                 GtkAdjustment *hadjustment,
                                                 GtkAdjustment *vadjustment);

For widgets that support scrolling, sets the scroll adjustments and returns `TRUE`. For widgets that don't support scrolling, does nothing and returns `FALSE`. Widgets that don't support scrolling can be scrolled by placing them in a GtkViewport, which does support scrolling.

`widget` : | a GtkWidget
`hadjustment` : | an adjustment for horizontal scrolling, or `NULL`
`vadjustment` : | an adjustment for vertical scrolling, or `NULL`
Returns : | `TRUE` if the widget supports scrolling

### gtk_widget_mnemonic_activate ()

    gboolean    gtk_widget_mnemonic_activate    (GtkWidget *widget,
                                                 gboolean group_cycling);

`widget` : |
`group_cycling` : |
Returns : |

### gtk_widget_class_install_style_property ()

    void        gtk_widget_class_install_style_property
                                                (GtkWidgetClass *klass,
                                                 GParamSpec *pspec);

`klass` : |
`pspec` : |

### gtk_widget_class_install_style_property_parser ()

    void        gtk_widget_class_install_style_property_parser
                                                (GtkWidgetClass *klass,
                                                 GParamSpec *pspec,
                                                 GtkRcPropertyParser parser);

`klass` : |
`pspec` : |
`parser` : |

### gtk_widget_class_find_style_property ()

    GParamSpec* gtk_widget_class_find_style_property
                                                (GtkWidgetClass *klass,
                                                 const gchar *property_name);

Finds a style property of a widget class by name.

`klass` : | a GtkWidgetClass
`property_name` : | the name of the style property to find
Returns : | the GParamSpec of the style property or `NULL` if `class` has no style property with that name.

Since 2.2

### gtk_widget_class_list_style_properties ()

    GParamSpec** gtk_widget_class_list_style_properties
                                                (GtkWidgetClass *klass,
                                                 guint *n_properties);

Returns all style properties of a widget class.

`klass` : | a GtkWidgetClass
`n_properties` : | location to return the number of style properties found
Returns : | an newly allocated array of GParamSpec*. The array must be freed with `g_free()`.

Since 2.2

### gtk_widget_region_intersect ()

    GdkRegion*  gtk_widget_region_intersect     (GtkWidget *widget,
                                                 GdkRegion *region);

Computes the intersection of a `widget`'s area and `region`, returning the intersection. The result may be empty, use `gdk_region_empty()` to check.

`widget` : | a GtkWidget
`region` : | a GdkRegion, in the same coordinate system as `widget->allocation`. That is, relative to `widget->window` for `NO_WINDOW` widgets; relative to the parent window of `widget->window` for widgets with their own window.
Returns : | A newly allocated region holding the intersection of `widget` and `region`. The coordinates of the return value are relative to `widget->window` for `NO_WINDOW` widgets, and relative to the parent window of `widget->window` for widgets with their own window.

### gtk_widget_send_expose ()

    gint        gtk_widget_send_expose          (GtkWidget *widget,
                                                 GdkEvent *event);

Very rarely-used function. This function is used to emit an expose event signals on a widget. This function is not normally used directly. The only time it is used is when propagating an expose event to a child `NO_WINDOW` widget, and that is normally done using `gtk_container_propagate_expose()`.

If you want to force an area of a window to be redrawn, use `gdk_window_invalidate_rect()` or `gdk_window_invalidate_region()`. To cause the redraw to be done immediately, follow that call with a call to `gdk_window_process_updates()`.

`widget` : | a GtkWidget
`event` : | a expose GdkEvent
Returns : | return from the event signal emission (`TRUE` if the event was handled)

### gtk_widget_style_get ()

    void        gtk_widget_style_get            (GtkWidget *widget,
                                                 const gchar *first_property_name,
                                                 ...);

Gets the values of a multiple style properties of `widget`.

`widget` : | a GtkWidget
`first_property_name` : | the name of the first property to get
`...` : | pairs of property names and locations to return the property values, starting with the location for `first_property_name`, terminated by `NULL`.

### gtk_widget_style_get_property ()

    void        gtk_widget_style_get_property   (GtkWidget *widget,
                                                 const gchar *property_name,
                                                 GValue *value);

Gets the value of a style property of `widget`.

`widget` : | a GtkWidget
`property_name` : | the name of a style property
`value` : | location to return the property value

### gtk_widget_style_get_valist ()

    void        gtk_widget_style_get_valist     (GtkWidget *widget,
                                                 const gchar *first_property_name,
                                                 va_list var_args);

Non-vararg variant of `gtk_widget_style_get()`. Used primarily by language bindings.

`widget` : | a GtkWidget
`first_property_name` : | the name of the first property to get
`var_args` : | a va_list of pairs of property names and locations to return the property values, starting with the location for `first_property_name`.

### gtk_widget_get_accessible ()

    AtkObject*  gtk_widget_get_accessible       (GtkWidget *widget);

`widget` : |
Returns : |

### gtk_widget_child_focus ()

    gboolean    gtk_widget_child_focus          (GtkWidget *widget,
                                                 GtkDirectionType direction);

This function is used by custom widget implementations; if you're writing an app, you'd use `gtk_widget_grab_focus()` to move the focus to a particular widget, and `gtk_container_set_focus_chain()` to change the focus tab order. So you may want to investigate those functions instead.

`gtk_widget_child_focus()` is called by containers as the user moves around the window using keyboard shortcuts. `direction` indicates what kind of motion is taking place (up, down, left, right, tab forward, tab backward). `gtk_widget_child_focus()` invokes the "focus" signal on GtkWidget; widgets override the default handler for this signal in order to implement appropriate focus behavior.

The "focus" default handler for a widget should return `TRUE` if moving in `direction` left the focus on a focusable location inside that widget, and `FALSE` if moving in `direction` moved the focus outside the widget. If returning `TRUE`, widgets normally call `gtk_widget_grab_focus()` to place the focus accordingly; if returning `FALSE`, they don't modify the current focus location.

This function replaces `gtk_container_focus()` from GTK+ 1.2. It was necessary to check that the child was visible, sensitive, and focusable before calling `gtk_container_focus()`. `gtk_widget_child_focus()` returns `FALSE` if the widget is not currently in a focusable state, so there's no need for those checks.

`widget` : | a GtkWidget
`direction` : | direction of focus movement
Returns : | `TRUE` if focus ended up inside `widget`

### gtk_widget_child_notify ()

    void        gtk_widget_child_notify         (GtkWidget *widget,
                                                 const gchar *child_property);

Emits a "child-notify" signal for the child property `child_property` on `widget`.

This is the analogue of `g_object_notify()` for child properties.

`widget` : | a GtkWidget
`child_property` : | the name of a child property installed on the class of `widget`'s parent.

### gtk_widget_freeze_child_notify ()

    void        gtk_widget_freeze_child_notify  (GtkWidget *widget);

Stops emission of "child-notify" signals on `widget`. The signals are queued until `gtk_widget_thaw_child_notify()` is called on `widget`.

This is the analogue of `g_object_freeze_notify()` for child properties.

`widget` : | a GtkWidget

### gtk_widget_get_child_visible ()

    gboolean    gtk_widget_get_child_visible    (GtkWidget *widget);

Gets the value set with `gtk_widget_set_child_visible()`. If you feel a need to use this function, your code probably needs reorganization.

This function is only useful for container implementations and never should be called by an application.

`widget` : | a GtkWidget
Returns : | `TRUE` if the widget is mapped with the parent.

### gtk_widget_get_parent ()

    GtkWidget*  gtk_widget_get_parent           (GtkWidget *widget);

Returns the parent container of `widget`.

`widget` : | a GtkWidget
Returns : | the parent container of `widget`, or `NULL`

### gtk_widget_get_settings ()

    GtkSettings* gtk_widget_get_settings        (GtkWidget *widget);

Gets the settings object holding the settings (global property settings, RC file information, etc) used for this widget.

Note that this function can only be called when the GtkWidget is attached to a toplevel, since the settings object is specific to a particular GdkScreen.

`widget` : | a GtkWidget
Returns : | the relevant GtkSettings object

### gtk_widget_get_clipboard ()

    GtkClipboard* gtk_widget_get_clipboard      (GtkWidget *widget,
                                                 GdkAtom selection);

Returns the clipboard object for the given selection to be used with `widget`. `widget` must have a GdkDisplay associated with it, so must be attached to a toplevel window.

`widget` : | a GtkWidget
`selection` : | a GdkAtom which identifies the clipboard to use. `GDK_SELECTION_CLIPBOARD` gives the default clipboard. Another common value is `GDK_SELECTION_PRIMARY`, which gives the primary X selection.
Returns : | the appropriate clipboard object. If no clipboard already exists, a new one will be created. Once a clipboard object has been created, it is persistent for all time.

Since 2.2

### gtk_widget_get_display ()

    GdkDisplay* gtk_widget_get_display          (GtkWidget *widget);

Get the GdkDisplay for the toplevel window associated with this widget. This function can only be called after the widget has been added to a widget hierarchy with a GtkWindow at the top.

In general, you should only create display specific resources when a widget has been realized, and you should free those resources when the widget is unrealized.

`widget` : | a GtkWidget
Returns : | the GdkDisplay for the toplevel for this widget.

Since 2.2

### gtk_widget_get_root_window ()

    GdkWindow*  gtk_widget_get_root_window      (GtkWidget *widget);

Get the root window where this widget is located. This function can only be called after the widget has been added to a widget heirarchy with GtkWindow at the top.

The root window is useful for such purposes as creating a popup GdkWindow associated with the window. In general, you should only create display specific resources when a widget has been realized, and you should free those resources when the widget is unrealized.

`widget` : | a GtkWidget
Returns : | the GdkWindow root window for the toplevel for this widget.

Since 2.2

### gtk_widget_get_screen ()

    GdkScreen*  gtk_widget_get_screen           (GtkWidget *widget);

Get the GdkScreen from the toplevel window associated with this widget. This function can only be called after the widget has been added to a widget hierarchy with a GtkWindow at the top.

In general, you should only create screen specific resources when a widget has been realized, and you should free those resources when the widget is unrealized.

`widget` : | a GtkWidget
Returns : | the GdkScreen for the toplevel for this widget.

Since 2.2

### gtk_widget_has_screen ()

    gboolean    gtk_widget_has_screen           (GtkWidget *widget);

Checks whether there is a GdkScreen is associated with this widget. All toplevel widgets have an associated screen, and all widgets added into a heirarchy with a toplevel window at the top.

`widget` : | a GtkWidget
Returns : | `TRUE` if there is a GdkScreen associcated with the widget.

Since 2.2

### gtk_widget_get_size_request ()

    void        gtk_widget_get_size_request     (GtkWidget *widget,
                                                 gint *width,
                                                 gint *height);

Gets the size request that was explicitly set for the widget using `gtk_widget_set_size_request()`. A value of -1 stored in `width` or `height` indicates that that dimension has not been set explicitly and the natural requisition of the widget will be used intead. See `gtk_widget_set_size_request()`. To get the size a widget will actually use, call `gtk_widget_size_request()` instead of this function.

`widget` : | a GtkWidget
`width` : | return location for width, or `NULL`
`height` : | return location for height, or `NULL`

### gtk_widget_pop_visual()

    #define gtk_widget_pop_visual()               ((void) 0)

### Warning

`gtk_widget_pop_visual` is deprecated and should not be used in newly-written code.

This function is deprecated; it does nothing.

### gtk_widget_push_visual()

    #define gtk_widget_push_visual(visual)        ((void) 0)

### Warning

`gtk_widget_push_visual` is deprecated and should not be used in newly-written code.

This function is deprecated; it does nothing.

`visual` : |

### gtk_widget_set_child_visible ()

    void        gtk_widget_set_child_visible    (GtkWidget *widget,
                                                 gboolean is_visible);

Sets whether `widget` should be mapped along with its when its parent is mapped and `widget` has been shown with `gtk_widget_show()`.

The child visibility can be set for widget before it is added to a container with `gtk_widget_set_parent()`, to avoid mapping children unnecessary before immediately unmapping them. However it will be reset to its default state of `TRUE` when the widget is removed from a container.

Note that changing the child visibility of a widget does not queue a resize on the widget. Most of the time, the size of a widget is computed from all visible children, whether or not they are mapped. If this is not the case, the container can queue a resize itself.

This function is only useful for container implementations and never should be called by an application.

`widget` : | a GtkWidget
`is_visible` : | if `TRUE`, `widget` should be mapped along with its parent.

### gtk_widget_set_default_visual()

    #define gtk_widget_set_default_visual(visual) ((void) 0)

### Warning

`gtk_widget_set_default_visual` is deprecated and should not be used in newly-written code.

This function is deprecated; it does nothing.

`visual` : |

### gtk_widget_set_size_request ()

    void        gtk_widget_set_size_request     (GtkWidget *widget,
                                                 gint width,
                                                 gint height);

Sets the minimum size of a widget; that is, the widget's size request will be `width` by `height`. You can use this function to force a widget to be either larger or smaller than it normally would be.

In most cases, `gtk_window_set_default_size()` is a better choice for toplevel windows than this function; setting the default size will still allow users to shrink the window. Setting the size request will force them to leave the window at least as large as the size request. When dealing with window sizes, `gtk_window_set_geometry_hints()` can be a useful function as well.

Note the inherent danger of setting any fixed size - themes, translations into other languages, different fonts, and user action can all change the appropriate size for a given widget. So, it's basically impossible to hardcode a size that will always be correct.

The size request of a widget is the smallest size a widget can accept while still functioning well and drawing itself correctly. However in some strange cases a widget may be allocated less than its requested size, and in many cases a widget may be allocated more space than it requested.

If the size request in a given direction is -1 (unset), then the "natural" size request of the widget will be used instead.

Widgets can't actually be allocated a size less than 1 by 1, but you can pass 0,0 to this function to mean "as small as possible."

`widget` : | a GtkWidget
`width` : | width `widget` should request, or -1 to unset
`height` : | height `widget` should request, or -1 to unset

### gtk_widget_set_visual()

    #define gtk_widget_set_visual(widget,visual)  ((void) 0)

### Warning

`gtk_widget_set_visual` is deprecated and should not be used in newly-written code.

This function is deprecated; it does nothing.

`widget` : |
`visual` : |

### gtk_widget_thaw_child_notify ()

    void        gtk_widget_thaw_child_notify    (GtkWidget *widget);

Reverts the effect of a previous call to `gtk_widget_freeze_child_notify()`. This causes all queued "child-notify" signals on `widget` to be emitted.

`widget` : | a GtkWidget

### gtk_requisition_copy ()

    GtkRequisition* gtk_requisition_copy        (const GtkRequisition *requisition);

Copies a GtkRequisition.

`requisition` : | a GtkRequisition.
Returns : | a copy of `requisition`.

### gtk_requisition_free ()

    void        gtk_requisition_free            (GtkRequisition *requisition);

Frees a GtkRequisition.

`requisition` : | a GtkRequisition.

## Properties

"`app-paintable`" (gboolean : Read / Write) | Whether the application will paint directly on the widget.
"`can-default`" (gboolean : Read / Write) | Whether the widget can be the default widget.
"`can-focus`" (gboolean : Read / Write) | Whether the widget can accept the input focus.
"`composite-child`" (gboolean : Read) | Whether the widget is part of a composite widget.
"`events`" (GdkEventMask : Read / Write) | The event mask that decides what kind of GdkEvents this widget gets.
"`extension-events`" (GdkExtensionMode : Read / Write) | The mask that decides what kind of extension events this widget gets.
"`has-default`" (gboolean : Read / Write) | Whether the widget is the default widget.
"`has-focus`" (gboolean : Read / Write) | Whether the widget has the input focus.
"`height-request`" (gint : Read / Write) | Override for height request of the widget, or -1 if natural request should be used.
"`is-focus`" (gboolean : Read / Write) | Whether the widget is the focus widget within the toplevel.
"`name`" (gchararray : Read / Write) | The name of the widget.
"`parent`" (GtkContainer : Read / Write) | The parent widget of this widget. Must be a Container widget.
"`receives-default`" (gboolean : Read / Write) | If TRUE, the widget will receive the default action when it is focused.
"`sensitive`" (gboolean : Read / Write) | Whether the widget responds to input.
"`style`" (GtkStyle : Read / Write) | The style of the widget, which contains information about how it will look (colors etc).
"`visible`" (gboolean : Read / Write) | Whether the widget is visible.
"`width-request`" (gint : Read / Write) | Override for width request of the widget, or -1 if natural request should be used.

## Style Properties

"`cursor-aspect-ratio`" (gfloat : Read) | Aspect ratio with which to draw insertion cursor.
"`cursor-color`" (GdkColor : Read) | Color with which to draw insertion cursor.
"`focus-line-pattern`" (gchararray : Read / Write) | Dash pattern used to draw the focus indicator.
"`focus-line-width`" (gint : Read / Write) | Width, in pixels, of the focus indicator line.
"`focus-padding`" (gint : Read / Write) | Width, in pixels, between focus indicator and the widget 'box'.
"`interior-focus`" (gboolean : Read) | Whether to draw the focus indicator inside widgets.
"`secondary-cursor-color`" (GdkColor : Read) | Color with which to draw the secondary insertion cursor when editing mixed right-to-left and left-to-right text.

## Signals

### The "accel-closures-changed" signal

    void        user_function                  (GtkWidget *widget,
                                                gpointer user_data);

`widget` : | the object which received the signal.
`user_data` : | user data set when the signal handler was connected.

### The "button-press-event" signal

    gboolean    user_function                  (GtkWidget *widget,
                                                GdkEventButton *event,
                                                gpointer user_data);

`widget` : | the object which received the signal.
`event` : |
`user_data` : | user data set when the signal handler was connected.
Returns : | `TRUE` to stop other handlers from being invoked for the event. `FALSE` to propagate the event further.

### The "button-release-event" signal

    gboolean    user_function                  (GtkWidget *widget,
                                                GdkEventButton *event,
                                                gpointer user_data);

`widget` : | the object which received the signal.
`event` : |
`user_data` : | user data set when the signal handler was connected.
Returns : | `TRUE` to stop other handlers from being invoked for the event. `FALSE` to propagate the event further.

### The "child-notify" signal

    void        user_function                  (GtkWidget *widget,
                                                GParamSpec *pspec,
                                                gpointer user_data);

The ::child-notify signal is emitted for each child property that has changed on an object. The signal's detail holds the property name.

`widget` : | the object which received the signal.
`pspec` : | the GParamSpec of the changed child property.
`user_data` : | user data set when the signal handler was connected.
`user_data` : | user data set when the signal handler was connected.

### The "client-event" signal

    gboolean    user_function                  (GtkWidget *widget,
                                                GdkEventClient *event,
                                                gpointer user_data);

`widget` : | the object which received the signal.
`event` : |
`user_data` : | user data set when the signal handler was connected.
Returns : | `TRUE` to stop other handlers from being invoked for the event. `FALSE` to propagate the event further.

### The "configure-event" signal

    gboolean    user_function                  (GtkWidget *widget,
                                                GdkEventConfigure *event,
                                                gpointer user_data);

`widget` : | the object which received the signal.
`event` : |
`user_data` : | user data set when the signal handler was connected.
Returns : | `TRUE` to stop other handlers from being invoked for the event. `FALSE` to propagate the event further.

### The "delete-event" signal

    gboolean    user_function                  (GtkWidget *widget,
                                                GdkEvent *event,
                                                gpointer user_data);

`widget` : | the object which received the signal.
`event` : |
`user_data` : | user data set when the signal handler was connected.
Returns : | `TRUE` to stop other handlers from being invoked for the event. `FALSE` to propagate the event further.

### The "destroy-event" signal

    gboolean    user_function                  (GtkWidget *widget,
                                                GdkEvent *event,
                                                gpointer user_data);

`widget` : | the object which received the signal.
`event` : |
`user_data` : | user data set when the signal handler was connected.
Returns : | `TRUE` to stop other handlers from being invoked for the event. `FALSE` to propagate the event further.

### The "direction-changed" signal

    void        user_function                  (GtkWidget *widget,
                                                GtkTextDirection arg1,
                                                gpointer user_data);

`widget` : | the object which received the signal.
`arg1` : |
`user_data` : | user data set when the signal handler was connected.

### The "drag-begin" signal

    void        user_function                  (GtkWidget *widget,
                                                GdkDragContext *drag_context,
                                                gpointer user_data);

`widget` : | the object which received the signal.
`drag_context` : |
`user_data` : | user data set when the signal handler was connected.

### The "drag-data-delete" signal

    void        user_function                  (GtkWidget *widget,
                                                GdkDragContext *drag_context,
                                                gpointer user_data);

`widget` : | the object which received the signal.
`drag_context` : |
`user_data` : | user data set when the signal handler was connected.

### The "drag-data-get" signal

    void        user_function                  (GtkWidget *widget,
                                                GdkDragContext *drag_context,
                                                GtkSelectionData *data,
                                                guint info,
                                                guint time,
                                                gpointer user_data);

`widget` : | the object which received the signal.
`drag_context` : |
`data` : |
`info` : |
`time` : |
`user_data` : | user data set when the signal handler was connected.

### The "drag-data-received" signal

    void        user_function                  (GtkWidget *widget,
                                                GdkDragContext *drag_context,
                                                gint x,
                                                gint y,
                                                GtkSelectionData *data,
                                                guint info,
                                                guint time,
                                                gpointer user_data);

The ::drag-data-received signal is emitted on the drop site when the drop happens and the data has been received. A handler for this signal is expected to process the received data and then call `gtk_drag_finish()`, setting the `success` parameter depending on whether the data was processed successfully.

The handler may inspect and modify `context->action` before calling `gtk_drag_finish()`, e.g. to implement `GTK_ACTION_ASK` as shown in the following example:

    void
    drag_data_received (GtkWidget          *widget,
                        GdkDragContext     *context,
                        gint                x,
                        gint                y,
                        GtkSelectionData   *data,
                        guint               info,
                        guint               time)
    {
      if ((data->length >= 0) && (data->format == 8))
        {
          if (context->action == GDK_ACTION_ASK)
            {
              GtkWidget *dialog;
              gint response;

              dialog = gtk_message_dialog_new (NULL,
                                               GTK_DIALOG_MODAL |
                                               GTK_DIALOG_DESTROY_WITH_PARENT,
                                               GTK_MESSAGE_INFO,
                                               GTK_BUTTONS_YES_NO,
                                               "Move the data ?\n");
              response = gtk_dialog_run (GTK_DIALOG (dialog));
              gtk_widget_destroy (dialog);

              if (response == GTK_RESPONSE_YES)
                context->action = GDK_ACTION_MOVE;
              else
                context->action = GDK_ACTION_COPY;
             }

          gtk_drag_finish (context, TRUE, FALSE, time);
          return;
        }

       gtk_drag_finish (context, FALSE, FALSE, time);
     }

`widget` : | the object which received the signal.
`drag_context` : | the drag context
`x` : | where the drop happened
`y` : | where the drop happened
`data` : | the received data
`info` : | the info that has been registered with the target in the GtkTargetList.
`time` : | the timestamp at which the data was received
`user_data` : | user data set when the signal handler was connected.
`user_data` : | user data set when the signal handler was connected.

### The "drag-drop" signal

    gboolean    user_function                  (GtkWidget *widget,
                                                GdkDragContext *drag_context,
                                                gint x,
                                                gint y,
                                                guint time,
                                                gpointer user_data);

`widget` : | the object which received the signal.
`drag_context` : |
`x` : |
`y` : |
`time` : |
`user_data` : | user data set when the signal handler was connected.
Returns : |

### The "drag-end" signal

    void        user_function                  (GtkWidget *widget,
                                                GdkDragContext *drag_context,
                                                gpointer user_data);

`widget` : | the object which received the signal.
`drag_context` : |
`user_data` : | user data set when the signal handler was connected.

### The "drag-leave" signal

    void        user_function                  (GtkWidget *widget,
                                                GdkDragContext *drag_context,
                                                guint time,
                                                gpointer user_data);

`widget` : | the object which received the signal.
`drag_context` : |
`time` : |
`user_data` : | user data set when the signal handler was connected.

### The "drag-motion" signal

    gboolean    user_function                  (GtkWidget *widget,
                                                GdkDragContext *drag_context,
                                                gint x,
                                                gint y,
                                                guint time,
                                                gpointer user_data);

`widget` : | the object which received the signal.
`drag_context` : |
`x` : |
`y` : |
`time` : |
`user_data` : | user data set when the signal handler was connected.
Returns : |

### The "enter-notify-event" signal

    gboolean    user_function                  (GtkWidget *widget,
                                                GdkEventCrossing *event,
                                                gpointer user_data);

`widget` : | the object which received the signal.
`event` : |
`user_data` : | user data set when the signal handler was connected.
Returns : | `TRUE` to stop other handlers from being invoked for the event. `FALSE` to propagate the event further.

### The "event" signal

    gboolean    user_function                  (GtkWidget *widget,
                                                GdkEvent *event,
                                                gpointer user_data);

`widget` : | the object which received the signal.
`event` : |
`user_data` : | user data set when the signal handler was connected.
Returns : | `TRUE` to stop other handlers from being invoked for the event. `FALSE` to propagate the event further.

### The "event-after" signal

    void        user_function                  (GtkWidget *widget,
                                                GdkEvent *event,
                                                gpointer user_data);

`widget` : | the object which received the signal.
`event` : |
`user_data` : | user data set when the signal handler was connected.

### The "expose-event" signal

    gboolean    user_function                  (GtkWidget *widget,
                                                GdkEventExpose *event,
                                                gpointer user_data);

`widget` : | the object which received the signal.
`event` : |
`user_data` : | user data set when the signal handler was connected.
Returns : | `TRUE` to stop other handlers from being invoked for the event. `FALSE` to propagate the event further.

### The "focus" signal

    gboolean    user_function                  (GtkWidget *widget,
                                                GtkDirectionType arg1,
                                                gpointer user_data);

`widget` : | the object which received the signal.
`arg1` : |
`user_data` : | user data set when the signal handler was connected.
Returns : | `TRUE` to stop other handlers from being invoked for the event. `FALSE` to propagate the event further.

### The "focus-in-event" signal

    gboolean    user_function                  (GtkWidget *widget,
                                                GdkEventFocus *event,
                                                gpointer user_data);

`widget` : | the object which received the signal.
`event` : |
`user_data` : | user data set when the signal handler was connected.
Returns : | `TRUE` to stop other handlers from being invoked for the event. `FALSE` to propagate the event further.

### The "focus-out-event" signal

    gboolean    user_function                  (GtkWidget *widget,
                                                GdkEventFocus *event,
                                                gpointer user_data);

`widget` : | the object which received the signal.
`event` : |
`user_data` : | user data set when the signal handler was connected.
Returns : | `TRUE` to stop other handlers from being invoked for the event. `FALSE` to propagate the event further.

### The "grab-focus" signal

    void        user_function                  (GtkWidget *widget,
                                                gpointer user_data);

`widget` : | the object which received the signal.
`user_data` : | user data set when the signal handler was connected.

### The "grab-notify" signal

    void        user_function                  (GtkWidget *widget,
                                                gboolean arg1,
                                                gpointer user_data);

`widget` : | the object which received the signal.
`arg1` : |
`user_data` : | user data set when the signal handler was connected.

### The "hide" signal

    void        user_function                  (GtkWidget *widget,
                                                gpointer user_data);

`widget` : | the object which received the signal.
`user_data` : | user data set when the signal handler was connected.

### The "hierarchy-changed" signal

    void        user_function                  (GtkWidget *widget,
                                                GtkWidget *widget2,
                                                gpointer user_data);

Emitted when there is a chance in the hierarchy to which a widget belong. More precisely, a widget is anchored when its toplevel ancestor is a GtkWindow. This signal is emitted when a widget changes from un-anchored to anchored or vice-versa.

`widget` : | the object which received the signal.
`widget2` : |
`user_data` : | user data set when the signal handler was connected.

### The "key-press-event" signal

    gboolean    user_function                  (GtkWidget *widget,
                                                GdkEventKey *event,
                                                gpointer user_data);

`widget` : | the object which received the signal.
`event` : |
`user_data` : | user data set when the signal handler was connected.
Returns : | `TRUE` to stop other handlers from being invoked for the event. `FALSE` to propagate the event further.

### The "key-release-event" signal

    gboolean    user_function                  (GtkWidget *widget,
                                                GdkEventKey *event,
                                                gpointer user_data);

`widget` : | the object which received the signal.
`event` : |
`user_data` : | user data set when the signal handler was connected.
Returns : | `TRUE` to stop other handlers from being invoked for the event. `FALSE` to propagate the event further.

### The "leave-notify-event" signal

    gboolean    user_function                  (GtkWidget *widget,
                                                GdkEventCrossing *event,
                                                gpointer user_data);

`widget` : | the object which received the signal.
`event` : |
`user_data` : | user data set when the signal handler was connected.
Returns : | `TRUE` to stop other handlers from being invoked for the event. `FALSE` to propagate the event further.

### The "map" signal

    void        user_function                  (GtkWidget *widget,
                                                gpointer user_data);

`widget` : | the object which received the signal.
`user_data` : | user data set when the signal handler was connected.

### The "map-event" signal

    gboolean    user_function                  (GtkWidget *widget,
                                                GdkEvent *event,
                                                gpointer user_data);

`widget` : | the object which received the signal.
`event` : |
`user_data` : | user data set when the signal handler was connected.
Returns : | `TRUE` to stop other handlers from being invoked for the event. `FALSE` to propagate the event further.

### The "mnemonic-activate" signal

    gboolean    user_function                  (GtkWidget *widget,
                                                gboolean arg1,
                                                gpointer user_data);

`widget` : | the object which received the signal.
`arg1` : |
`user_data` : | user data set when the signal handler was connected.
Returns : |

### The "motion-notify-event" signal

    gboolean    user_function                  (GtkWidget *widget,
                                                GdkEventMotion *event,
                                                gpointer user_data);

`widget` : | the object which received the signal.
`event` : |
`user_data` : | user data set when the signal handler was connected.
Returns : | `TRUE` to stop other handlers from being invoked for the event. `FALSE` to propagate the event further.

### The "no-expose-event" signal

    gboolean    user_function                  (GtkWidget *widget,
                                                GdkEventNoExpose *event,
                                                gpointer user_data);

`widget` : | the object which received the signal.
`event` : |
`user_data` : | user data set when the signal handler was connected.
Returns : | `TRUE` to stop other handlers from being invoked for the event. `FALSE` to propagate the event further.

### The "parent-set" signal

    void        user_function                  (GtkWidget *widget,
                                                GtkObject *old_parent,
                                                gpointer user_data);

`widget` : | the object which received the signal.
`old_parent` : |
`user_data` : | user data set when the signal handler was connected.

### The "popup-menu" signal

    gboolean    user_function                  (GtkWidget *widget,
                                                gpointer user_data);

`widget` : | the object which received the signal.
`user_data` : | user data set when the signal handler was connected.
Returns : |

### The "property-notify-event" signal

    gboolean    user_function                  (GtkWidget *widget,
                                                GdkEventProperty *event,
                                                gpointer user_data);

`widget` : | the object which received the signal.
`event` : |
`user_data` : | user data set when the signal handler was connected.
Returns : | `TRUE` to stop other handlers from being invoked for the event. `FALSE` to propagate the event further.

### The "proximity-in-event" signal

    gboolean    user_function                  (GtkWidget *widget,
                                                GdkEventProximity *event,
                                                gpointer user_data);

`widget` : | the object which received the signal.
`event` : |
`user_data` : | user data set when the signal handler was connected.
Returns : | `TRUE` to stop other handlers from being invoked for the event. `FALSE` to propagate the event further.

### The "proximity-out-event" signal

    gboolean    user_function                  (GtkWidget *widget,
                                                GdkEventProximity *event,
                                                gpointer user_data);

`widget` : | the object which received the signal.
`event` : |
`user_data` : | user data set when the signal handler was connected.
Returns : | `TRUE` to stop other handlers from being invoked for the event. `FALSE` to propagate the event further.

### The "realize" signal

    void        user_function                  (GtkWidget *widget,
                                                gpointer user_data);

`widget` : | the object which received the signal.
`user_data` : | user data set when the signal handler was connected.

### The "screen-changed" signal

    void        user_function                  (GtkWidget *widget,
                                                GdkScreen *arg1,
                                                gpointer user_data);

`widget` : | the object which received the signal.
`arg1` : |
`user_data` : | user data set when the signal handler was connected.

### The "scroll-event" signal

    gboolean    user_function                  (GtkWidget *widget,
                                                GdkEvent *event,
                                                gpointer user_data);

`widget` : | the object which received the signal.
`event` : |
`user_data` : | user data set when the signal handler was connected.
Returns : | `TRUE` to stop other handlers from being invoked for the event. `FALSE` to propagate the event further.

### The "selection-clear-event" signal

    gboolean    user_function                  (GtkWidget *widget,
                                                GdkEventSelection *event,
                                                gpointer user_data);

`widget` : | the object which received the signal.
`event` : |
`user_data` : | user data set when the signal handler was connected.
Returns : | `TRUE` to stop other handlers from being invoked for the event. `FALSE` to propagate the event further.

### The "selection-get" signal

    void        user_function                  (GtkWidget *widget,
                                                GtkSelectionData *data,
                                                guint info,
                                                guint time,
                                                gpointer user_data);

`widget` : | the object which received the signal.
`data` : |
`info` : |
`time` : |
`user_data` : | user data set when the signal handler was connected.

### The "selection-notify-event" signal

    gboolean    user_function                  (GtkWidget *widget,
                                                GdkEventSelection *event,
                                                gpointer user_data);

`widget` : | the object which received the signal.
`event` : |
`user_data` : | user data set when the signal handler was connected.
Returns : | `TRUE` to stop other handlers from being invoked for the event. `FALSE` to propagate the event further.

### The "selection-received" signal

    void        user_function                  (GtkWidget *widget,
                                                GtkSelectionData *data,
                                                guint time,
                                                gpointer user_data);

`widget` : | the object which received the signal.
`data` : |
`time` : |
`user_data` : | user data set when the signal handler was connected.

### The "selection-request-event" signal

    gboolean    user_function                  (GtkWidget *widget,
                                                GdkEventSelection *event,
                                                gpointer user_data);

`widget` : | the object which received the signal.
`event` : |
`user_data` : | user data set when the signal handler was connected.
Returns : | `TRUE` to stop other handlers from being invoked for the event. `FALSE` to propagate the event further.

### The "show" signal

    void        user_function                  (GtkWidget *widget,
                                                gpointer user_data);

`widget` : | the object which received the signal.
`user_data` : | user data set when the signal handler was connected.

### The "show-help" signal

    gboolean    user_function                  (GtkWidget *widget,
                                                GtkWidgetHelpType arg1,
                                                gpointer user_data);

`widget` : | the object which received the signal.
`arg1` : |
`user_data` : | user data set when the signal handler was connected.
Returns : |

### The "size-allocate" signal

    void        user_function                  (GtkWidget *widget,
                                                GtkAllocation *allocation,
                                                gpointer user_data);

`widget` : | the object which received the signal.
`allocation` : |
`user_data` : | user data set when the signal handler was connected.

### The "size-request" signal

    void        user_function                  (GtkWidget *widget,
                                                GtkRequisition *requisition,
                                                gpointer user_data);

`widget` : | the object which received the signal.
`requisition` : |
`user_data` : | user data set when the signal handler was connected.

### The "state-changed" signal

    void        user_function                  (GtkWidget *widget,
                                                GtkStateType state,
                                                gpointer user_data);

`widget` : | the object which received the signal.
`state` : |
`user_data` : | user data set when the signal handler was connected.

### The "style-set" signal

    void        user_function                  (GtkWidget *widget,
                                                GtkStyle *previous_style,
                                                gpointer user_data);

`widget` : | the object which received the signal.
`previous_style` : |
`user_data` : | user data set when the signal handler was connected.

### The "unmap" signal

    void        user_function                  (GtkWidget *widget,
                                                gpointer user_data);

`widget` : | the object which received the signal.
`user_data` : | user data set when the signal handler was connected.

### The "unmap-event" signal

    gboolean    user_function                  (GtkWidget *widget,
                                                GdkEvent *event,
                                                gpointer user_data);

`widget` : | the object which received the signal.
`event` : |
`user_data` : | user data set when the signal handler was connected.
Returns : | `TRUE` to stop other handlers from being invoked for the event. `FALSE` to propagate the event further.

### The "unrealize" signal

    void        user_function                  (GtkWidget *widget,
                                                gpointer user_data);

`widget` : | the object which received the signal.
`user_data` : | user data set when the signal handler was connected.

### The "visibility-notify-event" signal

    gboolean    user_function                  (GtkWidget *widget,
                                                GdkEvent *event,
                                                gpointer user_data);

`widget` : | the object which received the signal.
`event` : |
`user_data` : | user data set when the signal handler was connected.
Returns : | `TRUE` to stop other handlers from being invoked for the event. `FALSE` to propagate the event further.

### The "window-state-event" signal

    gboolean    user_function                  (GtkWidget *widget,
                                                GdkEvent *event,
                                                gpointer user_data);

`widget` : | the object which received the signal.
`event` : |
`user_data` : | user data set when the signal handler was connected.
Returns : | `TRUE` to stop other handlers from being invoked for the event. `FALSE` to propagate the event further.