Qt doesn't produce camera related key events on Maemo5

On N900 Qt doesn't produce Key_Camera and Key_CameraFocus key events.

It's necessary to track either changes in
/sys/devices/platform/gpio-switch/cam_focus/state for Key_CameraFocus and
/sys/devices/platform/gpio-switch/cam_launch/state for Key_Camera
or to listen to
/org/freedesktop/Hal/devices/platform_cam_focus and /org/freedesktop/Hal/devices/platform_cam_launch
dbus properties changes, like suggested http://talk.maemo.org/showthread.php?p=654706