void panel_menu_bar_change_background(PanelMenuBar* menubar)
{
#if GTK_CHECK_VERSION (3, 0, 0)
panel_background_apply_css(&menubar->priv->panel->background, GTK_WIDGET(menubar));
#else
panel_background_change_background_on_widget(&menubar->priv->panel->background, GTK_WIDGET(menubar));
#endif
}
static gboolean
panel_background_prepare (PanelBackground *background)
{
PanelBackgroundType effective_type;
GtkWidget *widget = NULL;
if (!background->transformed)
return FALSE;
effective_type = panel_background_effective_type (background);
switch (effective_type) {
case PANEL_BACK_NONE:
if (background->default_pattern) {
/* the theme background-image pattern must be scaled by
* the width & height of the panel so that when the
* backing region is cleared
* (gdk_window_clear_backing_region), the correctly
* scaled pattern is used */
cairo_matrix_t m;
cairo_surface_t *surface;
double width, height;
surface = NULL;
width = 1.0;
height = 1.0;
cairo_pattern_get_surface(background->default_pattern, &surface);
/* catch invalid images (e.g. -gtk-gradient) before scaling and rendering */
if (surface != NULL ){
cairo_surface_reference(surface);
width = cairo_image_surface_get_width (surface);
height = cairo_image_surface_get_height (surface);
cairo_matrix_init_translate (&m, 0, 0);
cairo_matrix_scale (&m,
width / background->region.width,
height / background->region.height);
cairo_pattern_set_matrix (background->default_pattern, &m);
gdk_window_set_background_pattern (background->window,
background->default_pattern);
}
else {
g_warning ("%s", "unsupported value of 'background-image' in GTK+ theme (such as '-gtk-gradient')");
/* use any background color that has been set if image is invalid */
gdk_window_set_background_rgba (
background->window, &background->default_color);
}
cairo_surface_destroy(surface);
} else
gdk_window_set_background_rgba (
background->window, &background->default_color);
break;
case PANEL_BACK_COLOR:
if (background->has_alpha &&
!gdk_window_check_composited_wm(background->window))
set_pixbuf_background (background);
else {
gdk_window_set_background_rgba (background->window,
&background->color);
}
break;
case PANEL_BACK_IMAGE:
set_pixbuf_background (background);
break;
default:
g_assert_not_reached ();
break;
}
/* Panel applets may use the panel's background pixmap to
* decide how to draw themselves. Therefore, we need to
* make sure that all drawing has been completed before
* the applet looks at the pixmap. */
gdk_display_sync (gdk_window_get_display (background->window));
gdk_window_get_user_data (GDK_WINDOW (background->window),
(gpointer) &widget);
if (GTK_IS_WIDGET (widget)) {
panel_background_apply_css (background, gtk_widget_get_toplevel(widget));
gtk_widget_set_app_paintable(widget,TRUE);
gtk_widget_queue_draw (widget);
}
background->notify_changed (background, background->user_data);
return TRUE;
}
