public bool Dequeue(out XEvent xevent)
{
StartOver:
bool got_xevent = false;
lock (lockobj) {
if (xqueue.Count > 0)
{
got_xevent = true;
xevent = xqueue.Dequeue();
}
else
{
xevent = new XEvent(); /* not strictly needed, but mcs complains */
}
}
if (got_xevent)
{
if (xevent.AnyEvent.type == XEventName.Expose)
{
#if spew
Console.Write("E");
Console.Out.Flush();
#endif
X11Hwnd hwnd = (X11Hwnd)Hwnd.GetObjectFromWindow(xevent.AnyEvent.window);
hwnd.AddExpose(xevent.AnyEvent.window == hwnd.ClientWindow,
xevent.ExposeEvent.x, xevent.ExposeEvent.y,
xevent.ExposeEvent.width, xevent.ExposeEvent.height);
goto StartOver;
}
else if (xevent.AnyEvent.type == XEventName.ConfigureNotify)
{
#if spew
Console.Write("C");
Console.Out.Flush();
#endif
X11Hwnd hwnd = (X11Hwnd)Hwnd.GetObjectFromWindow(xevent.AnyEvent.window);
hwnd.AddConfigureNotify(xevent);
goto StartOver;
}
else
{
#if spew
Console.Write("X");
Console.Out.Flush();
#endif
/* it was an event we can deal with directly, return it */
return(true);
}
}
else
{
if (paint_queue.Count > 0)
{
xevent = paint_queue.Dequeue();
#if spew
Console.Write("e");
Console.Out.Flush();
#endif
return(true);
}
else if (configure_queue.Count > 0)
{
xevent = configure_queue.Dequeue();
#if spew
Console.Write("c");
Console.Out.Flush();
#endif
return(true);
}
}
if (dispatch_idle && need_dispatch_idle)
{
OnIdle(EventArgs.Empty);
need_dispatch_idle = false;
}
lock (lockobj) {
if (CountUnlocked > 0)
{
goto StartOver;
}
if (Monitor.Wait(lockobj, NextTimeout(), true))
{
// the lock was reaquired before the
// timeout. meaning an event was
// enqueued by X11Display.XEventThread.
goto StartOver;
}
else
{
CheckTimers();
return(false);
}
}
}