Declaration [src]

gtk_window_set_opacity (
  GtkWindow* window,
  gdouble opacity

Description [src]

Request the windowing system to make window partially transparent, with opacity 0 being fully transparent and 1 fully opaque. (Values of the opacity parameter are clamped to the [0,1] range.) On X11 this has any effect only on X screens with a compositing manager running. See gtk_widget_is_composited(). On Windows it should work always.

Note that setting a window’s opacity after the window has been shown causes it to flicker once on Windows.

Available since:2.12
Deprecated since:3.8

Use gtk_widget_set_opacity instead.


opacity gdouble

Desired opacity, between 0 and 1