Java版世界时钟示例

这是一个Java版的世界时钟示例，移植自Gerrit创建的同名Swing应用（http://www.jug-muenster.de/swing-worldclock-427 ），需要运行在JRE1.5或以上环境当中。

移植此示例主要是因为前一阵移植过Gerrit的swing原子钟示例，所谓好事成双，这个世界时钟的示例自然不能放过（话说Gerrit为什么那么喜欢做时钟？……），毕竟Java桌面应用实例本就不多，但凡有参考价值的还是要多做汇总才好。

另外，此示例中关于多时区的分辨与显示部分，在非桌面应用中也具备一定的参考价值。

PS:由于此示例以LGame-Simple-0.2.5开发，所以也可以看作是世界时钟的AWT实现。

下载地址（源码在jar中）：http://loon-simple.googlecode.com/files/WorldClock.7z

运行代码如下所示（构建过程省略了Swing原版的一些步骤）：

package org.loon.test;
import java.awt.Graphics2D;
import java.awt.event.KeyEvent;
import java.awt.event.MouseEvent;
import java.awt.image.BufferedImage;
import org.loon.framework.game.simple.GameScene;
import org.loon.framework.game.simple.core.graphics.Deploy;
import org.loon.framework.game.simple.core.graphics.Screen;
import org.loon.framework.game.simple.utils.GraphicsUtils;
/**
 * Copyright 2008 - 2009
 * 
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 * 
 * @project loonframework
 * @author chenpeng
 * @email：[e-mail]
 * @version 0.1
 */
public class Main extends Screen {
	// 此示例移植自http://www.jug-muenster.de/swing-worldclock-427/同名应用
	public Main() {
		// 设置窗体背景
		this.setBackground(createBackgroundImage());
		// 创建时间精灵
		AnalogClock clock1 = new AnalogClock(City.Beijing, 25, 18, 74, 74);
		AnalogClock clock2 = new AnalogClock(City.NewYork, 25, 108, 74, 74);
		AnalogClock clock3 = new AnalogClock(City.SanFrancisco, 25, 198, 74, 74);
		AnalogClock clock4 = new AnalogClock(City.Dakka, 25, 288, 74, 74);
		// 添加精灵
		this.add(clock1);
		this.add(clock2);
		this.add(clock3);
		this.add(clock4);
	}
	public void draw(Graphics2D g) {
	}
	/**
	 * 创建背景图案
	 * 
	 * @return
	 */
	private BufferedImage createBackgroundImage() {
		final java.awt.image.BufferedImage IMAGE = GraphicsUtils.createImage(
				getWidth(), getHeight(), java.awt.Transparency.TRANSLUCENT);
		java.awt.Graphics2D g2 = IMAGE.createGraphics();
		g2.setRenderingHint(java.awt.RenderingHints.KEY_ANTIALIASING,
				java.awt.RenderingHints.VALUE_ANTIALIAS_ON);
		java.awt.geom.Point2D BACKGROUND_START = new java.awt.geom.Point2D.Double(
				0, 0);
		java.awt.geom.Point2D BACKGROUND_STOP = new java.awt.geom.Point2D.Double(
				0, getHeight());
		final float[] BACKGROUND_FRACTIONS = { 0.0f, 1.0f };
		final java.awt.Color[] BACKGROUND_COLORS = {
				new java.awt.Color(0x505652), new java.awt.Color(0x393E3A) };
		final java.awt.Shape BACKGROUND = new java.awt.geom.RoundRectangle2D.Double(
				0, 0, getWidth(), getHeight(), 5, 5);
		final java.awt.LinearGradientPaint BACKGROUND_GRADIENT = new java.awt.LinearGradientPaint(
				BACKGROUND_START, BACKGROUND_STOP, BACKGROUND_FRACTIONS,
				BACKGROUND_COLORS);
		g2.setPaint(BACKGROUND_GRADIENT);
		g2.fill(BACKGROUND);
		java.awt.geom.Point2D INNER_BACKGROUND_START = new java.awt.geom.Point2D.Double(
				0, 10);
		java.awt.geom.Point2D INNER_BACKGROUND_STOP = new java.awt.geom.Point2D.Double(
				0, getHeight() - 10);
		final float[] INNER_BACKGROUND_FRACTIONS = { 0.0f, 1.0f };
		final java.awt.Color[] INNER_BACKGROUND_COLORS = {
				new java.awt.Color(0x4D5651), new java.awt.Color(0x393E3A) };
		final java.awt.Shape INNER_BACKGROUND = new java.awt.geom.RoundRectangle2D.Double(
				10, 10, getWidth() - 20, getHeight() - 20, 5, 5);
		final java.awt.LinearGradientPaint INNER_BACKGROUND_GRADIENT = new java.awt.LinearGradientPaint(
				INNER_BACKGROUND_START, INNER_BACKGROUND_STOP,
				INNER_BACKGROUND_FRACTIONS, INNER_BACKGROUND_COLORS);
		g2.setPaint(INNER_BACKGROUND_GRADIENT);
		g2.fill(INNER_BACKGROUND);
		g2.setColor(new java.awt.Color(0x2F362E));
		g2.drawLine(10, 10, 10, getHeight() - 10);
		g2.drawLine(getWidth() - 10, 10, getWidth() - 10, getHeight() - 10);
		g2.drawLine(10, 10, getWidth() - 10, 10);
		g2.setColor(new java.awt.Color(0x6B7167));
		g2.drawLine(10, getHeight() - 10, getWidth() - 10, getHeight() - 10);
		g2.dispose();
		return IMAGE;
	}
	public void leftClick(MouseEvent e) {
	}
	public void middleClick(MouseEvent e) {
	}
	public void rightClick(MouseEvent e) {
	}
	public void onKey(KeyEvent e) {
	}
	public void onKeyUp(KeyEvent e) {
	}
	public static void main(String[] args) {
		GameScene frame = new GameScene("Java版世界时钟", 398, 391);
		Deploy deploy = frame.getDeploy();
		deploy.setScreen(new Main());
		deploy.setShowFPS(true);
		deploy.setLogo(false);
		deploy.setFPS(100);
		deploy.mainLoop();
		frame.showFrame();
	}
}

以下为运行效果：

下载地址（源码在jar中） ：http://loon-simple.googlecode.com/files/WorldClock.7z