10.7.2 Focus Events Generated by Grabs

Focus events in which the keyboard grab activates are identified by XFocusInEvent or XFocusOutEvent structures whose mode member is set to NotifyGrab. Focus events in which the keyboard grab deactivates are identified by XFocusInEvent or XFocusOutEvent structures whose mode member is set to NotifyUngrab (see XGrabKeyboard()).

• When a keyboard grab activates before generating any actual KeyPress event that activates the grab, G is the grab_window, and F is the current focus, the X server does the following:

  • It generates FocusIn and FocusOut events, with the mode members of the XFocusInEvent and XFocusOutEvent structures set to NotifyGrab. These events are generated as if the focus were to change from F to G.

• When a keyboard grab deactivates after generating any actual KeyRelease event that deactivates the grab, G is the grab_window, and F is the current focus, the X server does the following:

  • It generates FocusIn and FocusOut events, with the mode members of the XFocusInEvent and XFocusOutEvent structures set to NotifyUngrab. These events are generated as if the focus were to change from G to F.

Next: Key Map State Notification Events

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Christophe Tronche, [email protected]