java.awt.SystemColor#controlDkShadow ( )源码实例Demo

protected static void paintTick(Graphics g, int x, int y, int w, int h) {
	Graphics2D g2 = (Graphics2D) g.create();

	// on Macs we want the rich dark blue of controlHighlight,
	// but on Windows controlDkShadow is better. Let's check both
	// and pick one that has sufficient contrast

	g2.setColor(SystemColor.controlText);

	for (Color color : new Color[] { SystemColor.controlHighlight,
			SystemColor.controlDkShadow }) {
		float hsbDistance = getHSBDistance(SystemColor.window, color);
		if (hsbDistance > 1) {
			g2.setColor(color);
			break;
		}
	}
	g2.setStroke(new BasicStroke(2.1f));
	g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
			RenderingHints.VALUE_ANTIALIAS_ON);
	g2.setRenderingHint(RenderingHints.KEY_STROKE_CONTROL,
			RenderingHints.VALUE_STROKE_PURE);
	int k = Math.min(w, h) / 5;
	int cx = x + w / 2;
	int cy = y + h / 2;
	if (JVM.isMac) {
		// this make the rendering symmetrical; I'm not sure why platforms
		// vary
		g2.draw(new Line2D.Float(cx - k, cy - k, cx + k, cy + k));
	} else {
		g2.draw(new Line2D.Float(cx - k, cy - k, cx + k + 1, cy + k + 1));
	}
	g2.dispose();
}