gdk:window-events (window)

window -- a gdk:window object
event-mask -- a gdk:event-mask event mask for window

Accessor of the event mask for the window. The gdk:window-events function gets the event mask for the window for all master input devices. The (setf gdk:window-events) function sets the event mask.

The event mask for a window determines which events will be reported for that window from all master input devices. For example, an event mask including :button-press-mask means the window should report button press events. The event mask is the bitwise OR of values from the gdk:event-mask flags.