Adds an event filter to window, allowing you to intercept events before they reach GDK. This is a low-level operation and makes it easy to break GDK and/or GTK+, so you have to know what you're doing. Pass NULL for window to get all events for all windows, instead of events for a specific window.

If you are interested in X GenericEvents, bear in mind that XGetEventData() has been already called on the event, and XFreeEventData() must not be called within function.

class Window


function_ GdkFilterFunc

filter callback

data void*

data to pass to filter callback