Replaces the widget packed into the tooltip with
custom_widget. custom_widget does not get destroyed when the tooltip goes
away.
By default a box with a GtkImage and GtkLabel is embedded in
the tooltip, which can be configured using gtk_tooltip_set_markup()
and gtk_tooltip_set_icon().
Since 2.12
Replaces the widget packed into the tooltip with custom_widget. custom_widget does not get destroyed when the tooltip goes away. By default a box with a GtkImage and GtkLabel is embedded in the tooltip, which can be configured using gtk_tooltip_set_markup() and gtk_tooltip_set_icon(). Since 2.12