separator.java

java2图形设计卷1:awt 源码

import java.awt.*;

class Separator extends Component {
	int   thickness= 2;

	public void paint(Graphics g) {
		Dimension size = getSize();

		g.setColor(SystemColor.controlShadow);
		int y = (size.height/2) - (thickness/2);
		while(y < (size.height/2)) {
			g.drawLine(0, y, size.width, y);
			++y;
		}
        g.setColor(SystemColor.controlLtHighlight);
		y = size.height/2;
		while(y < ((size.height/2) + (thickness/2))) {
			g.drawLine(0, y, size.width, y);
			++y;
		}	
	}
	public Dimension getPreferredSize() {
		Dimension prefsz = getSize();

		prefsz.height = thickness;
		return prefsz;
	}
}