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window: Add support for enabling client decorations on non-Wayland

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Client side decorations can be enabled on non-Wayland platforms by
setting the GTK_CSD="1" environment variable.

We must ensure we have a GdkVisual that has an alpha channel since
the decorations rely on transparency. If we cannot get a visual with
an alpha channel then we do not enable client side decorations.
This commit is contained in:
Matthias Clasen 2013-03-17 12:06:26 -04:00
parent f17b7136dd
commit b141121ef6
1 changed files with 17 additions and 7 deletions
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24
gtk/gtkwindow.c
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@ -4855,16 +4855,26 @@ create_decoration (GtkWidget *widget)
return;
#ifdef GDK_WINDOWING_WAYLAND
if (!GDK_IS_WAYLAND_DISPLAY (gtk_widget_get_display (widget)))
return;
#else
return;
if (GDK_IS_WAYLAND_DISPLAY (gtk_widget_get_display (widget)))
priv->client_decorated = TRUE;
#endif
if (!priv->decorated)
return;
if (!priv->client_decorated &&
g_strcmp0 (g_getenv ("GTK_CSD"),"1") == 0)
{
GdkVisual *visual;
priv->client_decorated = TRUE;
/* We need a visual with alpha */
visual = gdk_screen_get_rgba_visual (gtk_widget_get_screen (widget));
if (visual)
{
gtk_widget_set_visual (widget, visual);
priv->client_decorated = TRUE;
}
}
if (!priv->client_decorated)
return;
priv->title_box = gtk_header_bar_new ();
g_object_set (priv->title_box,