jnodebuttonpeer.java

来自「纯java操作系统jnode,安装简单和操作简单的个人使用的Java操作系统」· Java 代码 · 共 66 行

/*
 * $Id: JNodeButtonPeer.java,v 1.1 2003/11/25 11:51:36 epr Exp $
 */
package org.jnode.awt.peer;

import java.awt.Button;
import java.awt.FontMetrics;
import java.awt.Graphics;
import java.awt.peer.ButtonPeer;

/**
 * @author epr
 */
public class JNodeButtonPeer extends JNodeComponentPeer implements ButtonPeer {

	private String label = null;
	private boolean pressed = false;

	/**
	 * @param toolkit
	 * @param awtObject
	 */
	public JNodeButtonPeer(JNodeToolkit toolkit, Button awtObject) {
		super(toolkit, awtObject);
	}

	/**
	 * @param label
	 * @see java.awt.peer.ButtonPeer#setLabel(java.lang.String)
	 */
	public void setLabel(String label) {
		this.label = label;
	}

	/**
	 * @param g
	 * @see java.awt.peer.ComponentPeer#paint(java.awt.Graphics)
	 */
	public void paint(Graphics g) {
		
		final int w = getWidth();
		final int h = getHeight();

		System.out.println("Button paint w=" + w + ", h=" + h);
		
		g.setColor(getBackground());
		g.fill3DRect(0, 0, w, h, !pressed);
		g.setColor(getForeground());

		if (label != null) {
			final FontMetrics fm = g.getFontMetrics();
			final int labelWidth = fm.stringWidth(label);
			final int labelHeight = fm.getHeight();
			g.drawString(label, (w - labelWidth) / 2, (h + labelHeight) / 2);
		}
	}
	/**
	 * @see java.awt.peer.ComponentPeer#isFocusTraversable()
	 * @return boolean
	 */
	public boolean isFocusTraversable() {
		return true;
	}

}