[ Version ( since = "2.12" ) ]
public void set_tooltip_window (Window? custom_window)
Replaces the default window used for displaying tooltips with custom_window.
GTK+ will take care of showing and hiding custom_window at the right moment, to behave likewise as the default tooltip
window. If custom_window is null, the default tooltip window will be used.
| this |
a Widget |
| custom_window |
a Window, or null |