Description

Gets a colormap to use for creating windows or pixmaps with an alpha channel. The windowing system on which GTK+ is running may not support this capability, in which case NULL will be returned. Even if a non-NULL value is returned, its possible that the window's alpha channel won't be honored when displaying the window on the screen: in particular, for X an appropriate windowing manager and compositing manager must be running to provide appropriate display.

Usage

Arguments

Details

This functionality is not implemented in the Windows backend.

For setting an overall opacity for a top-level window, see gdkWindowSetOpacity. Since 2.8

Value

[GdkColormap] a colormap to use for windows with an alpha channel or NULL if the capability is not available. [ transfer none ]

Author(s)

Derived by RGtkGen from GTK+ documentation