System.Windows.Forms.XplatUIX11.PeekMessage C# (CSharp) Method

		internal override bool PeekMessage(Object queue_id, ref MSG msg, IntPtr hWnd, int wFilterMin, int wFilterMax, uint flags) {
			XEventQueue queue = (XEventQueue) queue_id;
			bool	pending;

			if ((flags & (uint)PeekMessageFlags.PM_REMOVE) == 0) {
				throw new NotImplementedException("PeekMessage PM_NOREMOVE is not implemented yet");	// FIXME - Implement PM_NOREMOVE flag
			}

			pending = false;
			if (queue.Count > 0) {
				pending = true;
			} else {
				// Only call UpdateMessageQueue if real events are pending 
				// otherwise we go to sleep on the socket
				if (XPending(DisplayHandle) != 0) {
					UpdateMessageQueue((XEventQueue)queue_id);
					pending = true;
				} else if (((XEventQueue)queue_id).Paint.Count > 0) {
					pending = true;
				}
			}

			CheckTimers(queue.timer_list, DateTime.UtcNow);

			if (!pending) {
				return false;
			}
			return GetMessage(queue_id, ref msg, hWnd, wFilterMin, wFilterMax);
		}