bool QPlatformWindow::restrictMouse(bool grab)
{
	Q_UNUSED(grab);
	return false;
} 

bool QXcbWindow::restrictMouse(bool grab)
{
	if (!connection()->canGrab())
		return false;

	if (grab && !connection()->canGrab())
		return false;

	if (!grab) {
		xcb_ungrab_pointer(xcb_connection(), XCB_TIME_CURRENT_TIME);
		return true;
	}
	xcb_grab_pointer_cookie_t cookie = xcb_grab_pointer(xcb_connection(), false, m_window,
														(XCB_EVENT_MASK_BUTTON_PRESS | XCB_EVENT_MASK_BUTTON_RELEASE
														 | XCB_EVENT_MASK_BUTTON_MOTION | XCB_EVENT_MASK_ENTER_WINDOW
														 | XCB_EVENT_MASK_LEAVE_WINDOW | XCB_EVENT_MASK_POINTER_MOTION),
														XCB_GRAB_MODE_ASYNC, XCB_GRAB_MODE_ASYNC,
														m_window, XCB_CURSOR_NONE,
														XCB_TIME_CURRENT_TIME);
	xcb_grab_pointer_reply_t *reply = xcb_grab_pointer_reply(xcb_connection(), cookie, NULL);
	bool result = !(!reply || reply->status != XCB_GRAB_STATUS_SUCCESS);
	free(reply);
	return result;
}