gdk:window-device-events (window device)

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

The gdk:window-device-events function returns the event mask for the window corresponding to an specific device. The (setf gdk:window-device-events) function sets the event mask for a given device.

Normally a floating device, not attached to any visible pointer to the window. 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.