The event mask for a window determines which events will be reported
for that window. For example, an event mask including GDK_BUTTON_PRESS_MASK
means the window should report button press events. The event mask
is the bitwise OR of values from the GdkEventMask enumeration.
The event mask for a window determines which events will be reported for that window. For example, an event mask including GDK_BUTTON_PRESS_MASK means the window should report button press events. The event mask is the bitwise OR of values from the GdkEventMask enumeration.