Catching XEvents with x11EventFilter

[colfax4]

Hi all,

I am attempting to write a Qt application that displays a small window for a short period of time in certain intervals. I would also like to detect any motion on the mouse both when my window is shown and when it is not.

I have inherited QApplication and overloaded x11EventFilter which from what I have read should receive ALL XEvents and allow me to detect motion on the mouse cursor:

bool OSDApp::x11EventFilter(XEvent *e)
{
        qDebug("Got an event!\n");
        if (e->type == MotionNotify) {
           if ( sendMouseEvent() )
              qDebug("Sent Motion Event...\n");
           else
              qDebug("Error Sending Motion Event...\n");
        }
 
        return QApplication::x11EventFilter(e);
}

bool OSDApp::x11EventFilter(XEvent *e)
{
        qDebug("Got an event!\n");
        if (e->type == MotionNotify) {
           if ( sendMouseEvent() )
              qDebug("Sent Motion Event...\n");
           else
              qDebug("Error Sending Motion Event...\n");
        }

        return QApplication::x11EventFilter(e);
}

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Unfortunately, after executing my application I am unable to see any activity from x11EventFilter. This leads me to believe I will only see activity in x11EventFilter if I show a window and mouse activity happens within that window. Is this the case? Or am I missing something entirely. If this is indeed the case, does anybody know a way in which I can receive all motion events in Qt?

Thanks!

[marcel]

Have you used XSelectInput correctly?
This requests the X server to forward events to your window.
The syntax is:

XSelectInput( Display *display, Window w, long event_mask )

XSelectInput( Display *display, Window w, long event_mask )

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Regards