private boolean mouseInComponent(Point point) {
		boolean a = false, b = false;
		if (mainJPanel != null) {
			b = contains(mainJPanel, point);
		}
		SwingUtilities.convertPointFromScreen(point, this); // pointı䣬ʹpointע˳
		// a = contains(this, point); // ַе⣬this.contains()
		a = this.contains(point);
		return a || b;
	}