GNOME Documentation Library

GTK_STYLE_ATTACHED()

#define GTK_STYLE_ATTACHED(style)	(GTK_STYLE (style)->attach_count > 0)

Returns whether the style is attached to a window.

GtkStyle

typedef struct {
  GdkColor fg[5];
  GdkColor bg[5];
  GdkColor light[5];
  GdkColor dark[5];
  GdkColor mid[5];
  GdkColor text[5];
  GdkColor base[5];
  GdkColor text_aa[5];		/* Halfway between text/base */

  GdkColor black;
  GdkColor white;
  PangoFontDescription *font_desc;

  gint xthickness;
  gint ythickness;

  GdkGC *fg_gc[5];
  GdkGC *bg_gc[5];
  GdkGC *light_gc[5];
  GdkGC *dark_gc[5];
  GdkGC *mid_gc[5];
  GdkGC *text_gc[5];
  GdkGC *base_gc[5];
  GdkGC *text_aa_gc[5];
  GdkGC *black_gc;
  GdkGC *white_gc;

  GdkPixmap *bg_pixmap[5];
} GtkStyle;

gtk_style_new ()

GtkStyle*           gtk_style_new                       (void);

Creates a new GtkStyle.

gtk_style_copy ()

GtkStyle*           gtk_style_copy                      (GtkStyle *style);

Creates a copy of the passed in GtkStyle object.

gtk_style_attach ()

GtkStyle*           gtk_style_attach                    (GtkStyle *style,
                                                         GdkWindow *window);

Attaches a style to a window; this process allocates the colors and creates the GC's for the style - it specializes it to a particular visual and colormap. The process may involve the creation of a new style if the style has already been attached to a window with a different style and colormap.

Since this function may return a new object, you have to use it in the following way: style = gtk_style_attach (style, window)

gtk_style_detach ()

void                gtk_style_detach                    (GtkStyle *style);

Detaches a style from a window. If the style is not attached to any windows anymore, it is unrealized. See gtk_style_attach().

gtk_style_ref ()

GtkStyle*           gtk_style_ref                       (GtkStyle *style);

Increase the reference count of style.

gtk_style_unref ()

void                gtk_style_unref                     (GtkStyle *style);

Decrease the reference count of style.

gtk_style_set_background ()

void                gtk_style_set_background            (GtkStyle *style,
                                                         GdkWindow *window,
                                                         GtkStateType state_type);

Sets the background of window to the background color or pixmap specified by style for the given state.

gtk_style_apply_default_background ()

void                gtk_style_apply_default_background  (GtkStyle *style,
                                                         GdkWindow *window,
                                                         gboolean set_bg,
                                                         GtkStateType state_type,
                                                         const GdkRectangle *area,
                                                         gint x,
                                                         gint y,
                                                         gint width,
                                                         gint height);

gtk_style_apply_default_pixmap()

#define gtk_style_apply_default_pixmap(s,gw,st,a,x,y,w,h) gtk_style_apply_default_background (s,gw,1,st,a,x,y,w,h)

Does the same as gtk_style_apply_default_background().

gtk_style_lookup_color ()

gboolean            gtk_style_lookup_color              (GtkStyle *style,
                                                         const gchar *color_name,
                                                         GdkColor *color);

Looks up color_name in the style's logical color mappings, filling in color and returning TRUE if found, otherwise returning FALSE. Do not cache the found mapping, because it depends on the GtkStyle and might change when a theme switch occurs.

Since 2.10

gtk_style_lookup_icon_set ()

GtkIconSet*         gtk_style_lookup_icon_set           (GtkStyle *style,
                                                         const gchar *stock_id);

Looks up stock_id in the icon factories associated with style and the default icon factory, returning an icon set if found, otherwise NULL.

gtk_style_render_icon ()

GdkPixbuf*          gtk_style_render_icon               (GtkStyle *style,
                                                         const GtkIconSource *source,
                                                         GtkTextDirection direction,
                                                         GtkStateType state,
                                                         GtkIconSize size,
                                                         GtkWidget *widget,
                                                         const gchar *detail);

Renders the icon specified by source at the given size according to the given parameters and returns the result in a pixbuf.

gtk_style_get_font ()

GdkFont *           gtk_style_get_font                  (GtkStyle *style);

Gets the GdkFont to use for the given style. This is meant only as a replacement for direct access to style->font and should not be used in new code. New code should use style->font_desc instead.

gtk_style_set_font ()

void                gtk_style_set_font                  (GtkStyle *style,
                                                         GdkFont *font);

Sets the GdkFont to use for a given style. This is meant only as a replacement for direct access to style->font and should not be used in new code. New code should use style->font_desc instead.

gtk_style_get_style_property ()

void                gtk_style_get_style_property        (GtkStyle *style,
                                                         GType widget_type,
                                                         const gchar *property_name,
                                                         GValue *value);

Queries the value of a style property corresponding to a widget class is in the given style.

Since 2.16

gtk_style_get_valist ()

void                gtk_style_get_valist                (GtkStyle *style,
                                                         GType widget_type,
                                                         const gchar *first_property_name,
                                                         va_list var_args);

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

Since 2.16

gtk_style_get ()

void                gtk_style_get                       (GtkStyle *style,
                                                         GType widget_type,
                                                         const gchar *first_property_name,
                                                         ...);

Gets the values of a multiple style properties for widget_type from style.

Since 2.16

gtk_draw_hline ()

void                gtk_draw_hline                      (GtkStyle *style,
                                                         GdkWindow *window,
                                                         GtkStateType state_type,
                                                         gint x1,
                                                         gint x2,
                                                         gint y);

Draws a horizontal line from (x1, y) to (x2, y) in window using the given style and state.

gtk_draw_vline ()

void                gtk_draw_vline                      (GtkStyle *style,
                                                         GdkWindow *window,
                                                         GtkStateType state_type,
                                                         gint y1_,
                                                         gint y2_,
                                                         gint x);

Draws a vertical line from (x, y1_) to (x, y2_) in window using the given style and state.

gtk_draw_shadow ()

void                gtk_draw_shadow                     (GtkStyle *style,
                                                         GdkWindow *window,
                                                         GtkStateType state_type,
                                                         GtkShadowType shadow_type,
                                                         gint x,
                                                         gint y,
                                                         gint width,
                                                         gint height);

Draws a shadow around the given rectangle in window using the given style and state and shadow type.

gtk_draw_polygon ()

void                gtk_draw_polygon                    (GtkStyle *style,
                                                         GdkWindow *window,
                                                         GtkStateType state_type,
                                                         GtkShadowType shadow_type,
                                                         GdkPoint *points,
                                                         gint npoints,
                                                         gboolean fill);

Draws a polygon on window with the given parameters.

gtk_draw_arrow ()

void                gtk_draw_arrow                      (GtkStyle *style,
                                                         GdkWindow *window,
                                                         GtkStateType state_type,
                                                         GtkShadowType shadow_type,
                                                         GtkArrowType arrow_type,
                                                         gboolean fill,
                                                         gint x,
                                                         gint y,
                                                         gint width,
                                                         gint height);

Draws an arrow in the given rectangle on window using the given parameters. arrow_type determines the direction of the arrow.

gtk_draw_diamond ()

void                gtk_draw_diamond                    (GtkStyle *style,
                                                         GdkWindow *window,
                                                         GtkStateType state_type,
                                                         GtkShadowType shadow_type,
                                                         gint x,
                                                         gint y,
                                                         gint width,
                                                         gint height);

Draws a diamond in the given rectangle on window using the given parameters.

gtk_draw_string ()

void                gtk_draw_string                     (GtkStyle *style,
                                                         GdkWindow *window,
                                                         GtkStateType state_type,
                                                         gint x,
                                                         gint y,
                                                         const gchar *string);

Draws a text string on window with the given parameters.

gtk_draw_box ()

void                gtk_draw_box                        (GtkStyle *style,
                                                         GdkWindow *window,
                                                         GtkStateType state_type,
                                                         GtkShadowType shadow_type,
                                                         gint x,
                                                         gint y,
                                                         gint width,
                                                         gint height);

Draws a box on window with the given parameters.

gtk_draw_box_gap ()

void                gtk_draw_box_gap                    (GtkStyle *style,
                                                         GdkWindow *window,
                                                         GtkStateType state_type,
                                                         GtkShadowType shadow_type,
                                                         gint x,
                                                         gint y,
                                                         gint width,
                                                         gint height,
                                                         GtkPositionType gap_side,
                                                         gint gap_x,
                                                         gint gap_width);

Draws a box in window using the given style and state and shadow type, leaving a gap in one side.

gtk_draw_check ()

void                gtk_draw_check                      (GtkStyle *style,
                                                         GdkWindow *window,
                                                         GtkStateType state_type,
                                                         GtkShadowType shadow_type,
                                                         gint x,
                                                         gint y,
                                                         gint width,
                                                         gint height);

Draws a check button indicator in the given rectangle on window with the given parameters.

gtk_draw_extension ()

void                gtk_draw_extension                  (GtkStyle *style,
                                                         GdkWindow *window,
                                                         GtkStateType state_type,
                                                         GtkShadowType shadow_type,
                                                         gint x,
                                                         gint y,
                                                         gint width,
                                                         gint height,
                                                         GtkPositionType gap_side);

Draws an extension, i.e. a notebook tab.

gtk_draw_flat_box ()

void                gtk_draw_flat_box                   (GtkStyle *style,
                                                         GdkWindow *window,
                                                         GtkStateType state_type,
                                                         GtkShadowType shadow_type,
                                                         gint x,
                                                         gint y,
                                                         gint width,
                                                         gint height);

Draws a flat box on window with the given parameters.

gtk_draw_focus ()

void                gtk_draw_focus                      (GtkStyle *style,
                                                         GdkWindow *window,
                                                         gint x,
                                                         gint y,
                                                         gint width,
                                                         gint height);

Draws a focus indicator around the given rectangle on window using the given style.

gtk_draw_handle ()

void                gtk_draw_handle                     (GtkStyle *style,
                                                         GdkWindow *window,
                                                         GtkStateType state_type,
                                                         GtkShadowType shadow_type,
                                                         gint x,
                                                         gint y,
                                                         gint width,
                                                         gint height,
                                                         GtkOrientation orientation);

Draws a handle as used in GtkHandleBox and GtkPaned.

gtk_draw_option ()

void                gtk_draw_option                     (GtkStyle *style,
                                                         GdkWindow *window,
                                                         GtkStateType state_type,
                                                         GtkShadowType shadow_type,
                                                         gint x,
                                                         gint y,
                                                         gint width,
                                                         gint height);

Draws a radio button indicator in the given rectangle on window with the given parameters.

gtk_draw_shadow_gap ()

void                gtk_draw_shadow_gap                 (GtkStyle *style,
                                                         GdkWindow *window,
                                                         GtkStateType state_type,
                                                         GtkShadowType shadow_type,
                                                         gint x,
                                                         gint y,
                                                         gint width,
                                                         gint height,
                                                         GtkPositionType gap_side,
                                                         gint gap_x,
                                                         gint gap_width);

Draws a shadow around the given rectangle in window using the given style and state and shadow type, leaving a gap in one side.

gtk_draw_slider ()

void                gtk_draw_slider                     (GtkStyle *style,
                                                         GdkWindow *window,
                                                         GtkStateType state_type,
                                                         GtkShadowType shadow_type,
                                                         gint x,
                                                         gint y,
                                                         gint width,
                                                         gint height,
                                                         GtkOrientation orientation);

Draws a slider in the given rectangle on window using the given style and orientation.

gtk_draw_tab ()

void                gtk_draw_tab                        (GtkStyle *style,
                                                         GdkWindow *window,
                                                         GtkStateType state_type,
                                                         GtkShadowType shadow_type,
                                                         gint x,
                                                         gint y,
                                                         gint width,
                                                         gint height);

Draws an option menu tab (i.e. the up and down pointing arrows) in the given rectangle on window using the given parameters.

gtk_draw_expander ()

void                gtk_draw_expander                   (GtkStyle *style,
                                                         GdkWindow *window,
                                                         GtkStateType state_type,
                                                         gint x,
                                                         gint y,
                                                         GtkExpanderStyle expander_style);

Draws an expander as used in GtkTreeView.

gtk_draw_layout ()

void                gtk_draw_layout                     (GtkStyle *style,
                                                         GdkWindow *window,
                                                         GtkStateType state_type,
                                                         gboolean use_text,
                                                         gint x,
                                                         gint y,
                                                         PangoLayout *layout);

Draws a layout on window using the given parameters.

gtk_draw_resize_grip ()

void                gtk_draw_resize_grip                (GtkStyle *style,
                                                         GdkWindow *window,
                                                         GtkStateType state_type,
                                                         GdkWindowEdge edge,
                                                         gint x,
                                                         gint y,
                                                         gint width,
                                                         gint height);

Draws a resize grip in the given rectangle on window using the given parameters.

gtk_paint_arrow ()

void                gtk_paint_arrow                     (GtkStyle *style,
                                                         GdkWindow *window,
                                                         GtkStateType state_type,
                                                         GtkShadowType shadow_type,
                                                         const GdkRectangle *area,
                                                         GtkWidget *widget,
                                                         const gchar *detail,
                                                         GtkArrowType arrow_type,
                                                         gboolean fill,
                                                         gint x,
                                                         gint y,
                                                         gint width,
                                                         gint height);

Draws an arrow in the given rectangle on window using the given parameters. arrow_type determines the direction of the arrow.

gtk_paint_box ()

void                gtk_paint_box                       (GtkStyle *style,
                                                         GdkWindow *window,
                                                         GtkStateType state_type,
                                                         GtkShadowType shadow_type,
                                                         const GdkRectangle *area,
                                                         GtkWidget *widget,
                                                         const gchar *detail,
                                                         gint x,
                                                         gint y,
                                                         gint width,
                                                         gint height);

Draws a box on window with the given parameters.

gtk_paint_box_gap ()

void                gtk_paint_box_gap                   (GtkStyle *style,
                                                         GdkWindow *window,
                                                         GtkStateType state_type,
                                                         GtkShadowType shadow_type,
                                                         const GdkRectangle *area,
                                                         GtkWidget *widget,
                                                         const gchar *detail,
                                                         gint x,
                                                         gint y,
                                                         gint width,
                                                         gint height,
                                                         GtkPositionType gap_side,
                                                         gint gap_x,
                                                         gint gap_width);

Draws a box in window using the given style and state and shadow type, leaving a gap in one side.

gtk_paint_check ()

void                gtk_paint_check                     (GtkStyle *style,
                                                         GdkWindow *window,
                                                         GtkStateType state_type,
                                                         GtkShadowType shadow_type,
                                                         const GdkRectangle *area,
                                                         GtkWidget *widget,
                                                         const gchar *detail,
                                                         gint x,
                                                         gint y,
                                                         gint width,
                                                         gint height);

Draws a check button indicator in the given rectangle on window with the given parameters.

gtk_paint_diamond ()

void                gtk_paint_diamond                   (GtkStyle *style,
                                                         GdkWindow *window,
                                                         GtkStateType state_type,
                                                         GtkShadowType shadow_type,
                                                         const GdkRectangle *area,
                                                         GtkWidget *widget,
                                                         const gchar *detail,
                                                         gint x,
                                                         gint y,
                                                         gint width,
                                                         gint height);

Draws a diamond in the given rectangle on window using the given parameters.

gtk_paint_extension ()

void                gtk_paint_extension                 (GtkStyle *style,
                                                         GdkWindow *window,
                                                         GtkStateType state_type,
                                                         GtkShadowType shadow_type,
                                                         const GdkRectangle *area,
                                                         GtkWidget *widget,
                                                         const gchar *detail,
                                                         gint x,
                                                         gint y,
                                                         gint width,
                                                         gint height,
                                                         GtkPositionType gap_side);

Draws an extension, i.e. a notebook tab.

gtk_paint_flat_box ()

void                gtk_paint_flat_box                  (GtkStyle *style,
                                                         GdkWindow *window,
                                                         GtkStateType state_type,
                                                         GtkShadowType shadow_type,
                                                         const GdkRectangle *area,
                                                         GtkWidget *widget,
                                                         const gchar *detail,
                                                         gint x,
                                                         gint y,
                                                         gint width,
                                                         gint height);

Draws a flat box on window with the given parameters.

gtk_paint_focus ()

void                gtk_paint_focus                     (GtkStyle *style,
                                                         GdkWindow *window,
                                                         GtkStateType state_type,
                                                         const GdkRectangle *area,
                                                         GtkWidget *widget,
                                                         const gchar *detail,
                                                         gint x,
                                                         gint y,
                                                         gint width,
                                                         gint height);

Draws a focus indicator around the given rectangle on window using the given style.

gtk_paint_handle ()

void                gtk_paint_handle                    (GtkStyle *style,
                                                         GdkWindow *window,
                                                         GtkStateType state_type,
                                                         GtkShadowType shadow_type,
                                                         const GdkRectangle *area,
                                                         GtkWidget *widget,
                                                         const gchar *detail,
                                                         gint x,
                                                         gint y,
                                                         gint width,
                                                         gint height,
                                                         GtkOrientation orientation);

Draws a handle as used in GtkHandleBox and GtkPaned.

gtk_paint_hline ()

void                gtk_paint_hline                     (GtkStyle *style,
                                                         GdkWindow *window,
                                                         GtkStateType state_type,
                                                         const GdkRectangle *area,
                                                         GtkWidget *widget,
                                                         const gchar *detail,
                                                         gint x1,
                                                         gint x2,
                                                         gint y);

Draws a horizontal line from (x1, y) to (x2, y) in window using the given style and state.

gtk_paint_option ()

void                gtk_paint_option                    (GtkStyle *style,
                                                         GdkWindow *window,
                                                         GtkStateType state_type,
                                                         GtkShadowType shadow_type,
                                                         const GdkRectangle *area,
                                                         GtkWidget *widget,
                                                         const gchar *detail,
                                                         gint x,
                                                         gint y,
                                                         gint width,
                                                         gint height);

Draws a radio button indicator in the given rectangle on window with the given parameters.

gtk_paint_polygon ()

void                gtk_paint_polygon                   (GtkStyle *style,
                                                         GdkWindow *window,
                                                         GtkStateType state_type,
                                                         GtkShadowType shadow_type,
                                                         const GdkRectangle *area,
                                                         GtkWidget *widget,
                                                         const gchar *detail,
                                                         const GdkPoint *points,
                                                         gint n_points,
                                                         gboolean fill);

Draws a polygon on window with the given parameters.

gtk_paint_shadow ()

void                gtk_paint_shadow                    (GtkStyle *style,
                                                         GdkWindow *window,
                                                         GtkStateType state_type,
                                                         GtkShadowType shadow_type,
                                                         const GdkRectangle *area,
                                                         GtkWidget *widget,
                                                         const gchar *detail,
                                                         gint x,
                                                         gint y,
                                                         gint width,
                                                         gint height);

Draws a shadow around the given rectangle in window using the given style and state and shadow type.

gtk_paint_shadow_gap ()

void                gtk_paint_shadow_gap                (GtkStyle *style,
                                                         GdkWindow *window,
                                                         GtkStateType state_type,
                                                         GtkShadowType shadow_type,
                                                         const GdkRectangle *area,
                                                         GtkWidget *widget,
                                                         const gchar *detail,
                                                         gint x,
                                                         gint y,
                                                         gint width,
                                                         gint height,
                                                         GtkPositionType gap_side,
                                                         gint gap_x,
                                                         gint gap_width);

Draws a shadow around the given rectangle in window using the given style and state and shadow type, leaving a gap in one side.

gtk_paint_slider ()

void                gtk_paint_slider                    (GtkStyle *style,
                                                         GdkWindow *window,
                                                         GtkStateType state_type,
                                                         GtkShadowType shadow_type,
                                                         const GdkRectangle *area,
                                                         GtkWidget *widget,
                                                         const gchar *detail,
                                                         gint x,
                                                         gint y,
                                                         gint width,
                                                         gint height,
                                                         GtkOrientation orientation);

Draws a slider in the given rectangle on window using the given style and orientation.

gtk_paint_string ()

void                gtk_paint_string                    (GtkStyle *style,
                                                         GdkWindow *window,
                                                         GtkStateType state_type,
                                                         const GdkRectangle *area,
                                                         GtkWidget *widget,
                                                         const gchar *detail,
                                                         gint x,
                                                         gint y,
                                                         const gchar *string);

Draws a text string on window with the given parameters.

gtk_paint_tab ()

void                gtk_paint_tab                       (GtkStyle *style,
                                                         GdkWindow *window,
                                                         GtkStateType state_type,
                                                         GtkShadowType shadow_type,
                                                         const GdkRectangle *area,
                                                         GtkWidget *widget,
                                                         const gchar *detail,
                                                         gint x,
                                                         gint y,
                                                         gint width,
                                                         gint height);

Draws an option menu tab (i.e. the up and down pointing arrows) in the given rectangle on window using the given parameters.

gtk_paint_vline ()

void                gtk_paint_vline                     (GtkStyle *style,
                                                         GdkWindow *window,
                                                         GtkStateType state_type,
                                                         const GdkRectangle *area,
                                                         GtkWidget *widget,
                                                         const gchar *detail,
                                                         gint y1_,
                                                         gint y2_,
                                                         gint x);

Draws a vertical line from (x, y1_) to (x, y2_) in window using the given style and state.

gtk_paint_expander ()

void                gtk_paint_expander                  (GtkStyle *style,
                                                         GdkWindow *window,
                                                         GtkStateType state_type,
                                                         const GdkRectangle *area,
                                                         GtkWidget *widget,
                                                         const gchar *detail,
                                                         gint x,
                                                         gint y,
                                                         GtkExpanderStyle expander_style);

Draws an expander as used in GtkTreeView. x and y specify the center the expander. The size of the expander is determined by the "expander-size" style property of widget. (If widget is not specified or doesn't have an "expander-size" property, an unspecified default size will be used, since the caller doesn't have sufficient information to position the expander, this is likely not useful.) The expander is expander_size pixels tall in the collapsed position and expander_size pixels wide in the expanded position.

gtk_paint_layout ()

void                gtk_paint_layout                    (GtkStyle *style,
                                                         GdkWindow *window,
                                                         GtkStateType state_type,
                                                         gboolean use_text,
                                                         const GdkRectangle *area,
                                                         GtkWidget *widget,
                                                         const gchar *detail,
                                                         gint x,
                                                         gint y,
                                                         PangoLayout *layout);

Draws a layout on window using the given parameters.

gtk_paint_resize_grip ()

void                gtk_paint_resize_grip               (GtkStyle *style,
                                                         GdkWindow *window,
                                                         GtkStateType state_type,
                                                         const GdkRectangle *area,
                                                         GtkWidget *widget,
                                                         const gchar *detail,
                                                         GdkWindowEdge edge,
                                                         gint x,
                                                         gint y,
                                                         gint width,
                                                         gint height);

Draws a resize grip in the given rectangle on window using the given parameters.

gtk_draw_insertion_cursor ()

void                gtk_draw_insertion_cursor           (GtkWidget *widget,
                                                         GdkDrawable *drawable,
                                                         const GdkRectangle *area,
                                                         const GdkRectangle *location,
                                                         gboolean is_primary,
                                                         GtkTextDirection direction,
                                                         gboolean draw_arrow);

Draws a text caret on drawable at location. This is not a style function but merely a convenience function for drawing the standard cursor shape.

Since 2.4

GtkBorder

typedef struct {
  gint left;
  gint right;
  gint top;
  gint bottom;
} GtkBorder;

A struct that specifies a border around a rectangular area that can be of different width on each side.

gtk_border_new ()

GtkBorder *         gtk_border_new                      (void);

Allocates a new GtkBorder structure and initializes its elements to zero.

Since 2.14

gtk_border_copy ()

GtkBorder *         gtk_border_copy                     (const GtkBorder *border_);

Copies a GtkBorder structure.

gtk_border_free ()

void                gtk_border_free                     (GtkBorder *border_);

Frees a GtkBorder structure.

GtkRcProperty

typedef struct {
  /* quark-ified property identifier like "GtkScrollbar::spacing" */
  GQuark type_name;
  GQuark property_name;

  /* fields similar to GtkSettingsValue */
  gchar *origin;
  GValue value;
} GtkRcProperty;

GtkRcPropertyParser ()

gboolean            (*GtkRcPropertyParser)              (const GParamSpec *pspec,
                                                         const GString *rc_string,
                                                         GValue *property_value);

The "realize" signal

void                user_function                      (GtkStyle *style,
                                                        gpointer  user_data)      : Run First

Emitted when the style has been initialized for a particular colormap and depth. Connecting to this signal is probably seldom useful since most of the time applications and widgets only deal with styles that have been already realized.

Since 2.4

The "unrealize" signal

void                user_function                      (GtkStyle *style,
                                                        gpointer  user_data)      : Run First

Emitted when the aspects of the style specific to a particular colormap and depth are being cleaned up. A connection to this signal can be useful if a widget wants to cache objects like a GdkGC as object data on GtkStyle. This signal provides a convenient place to free such cached objects.

Since 2.4