GtkWidgetPaintable — Drawing a widget elsewhere
GtkWidgetPaintable will also take care of the widget not being in a state where it can be drawn (like when it isn't shown) and just draw nothing or where it does not have a size (like when it is hidden) and report no size in that case.
Of course, GtkWidgetPaintable allows you to monitor widgets for size changes by emitting the “invalidate-size” signal whenever the size of the widget changes as well as for visual changes by emitting the “invalidate-contents” signal whenever the widget changes.
You can of course use a GtkWidgetPaintable everywhere a GdkPaintable is allowed, including using it on a GtkPicture (or one of its parents) that it was set on itself via
gtk_picture_set_paintable(). The paintable will take care of recursion when this happens. If you do this however, ensure the “can-shrink” property is set to
TRUE or you might end up with an infinitely growing widget.
GdkPaintable * gtk_widget_paintable_new (
Creates a new widget paintable observing the given widget.
a GtkWidget or
a new GtkWidgetPaintable.
[transfer full][type GtkWidgetPaintable]
GtkWidget * gtk_widget_paintable_get_widget (
Returns the widget that is observed or
NULL if none.
the observed widget.
typedef struct _GtkWidgetPaintable GtkWidgetPaintable;
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