Using Swing and AWT in Swt

最新推荐文章于 2024-02-26 17:00:38 发布

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最新推荐文章于 2024-02-26 17:00:38 发布

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分类专栏：基础收集文章标签： Swing Java Eclipse

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本文介绍了一个使用AWT实现的模拟时钟示例，并展示了如何将AWT组件整合到SWT环境中，通过定时器更新时钟显示。

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一个awt做的模拟时钟的例子(代码来源Java2程序设计150例)
很简单，应该很容易看懂，
第二个例子在第一例子的基础上进行了小修改在swt上运行awt,swing。
java 代码

import java.awt.*;
import java.awt.event.*;
import java.awt.geom.*;

import java.util.Calendar; import javax.swing.*; public class Clock extends JPanel implements ActionListener { // 创建时钟的外形 protected static Ellipse2D face = new Ellipse2D.Float(3, 3, 94, 94); // 创建时钟的标记 protected static GeneralPath tick = new GeneralPath(); static { tick.moveTo(100, 100); tick.moveTo(49, 0); tick.lineTo(51, 0); tick.lineTo(51, 6); tick.lineTo(49, 6); tick.lineTo(49, 0); } // 创建时针 protected static GeneralPath hourHand = new GeneralPath(); static { hourHand.moveTo(50, 15); hourHand.lineTo(53, 50); hourHand.lineTo(50, 53); hourHand.lineTo(47, 50); hourHand.lineTo(50, 15); } // 创建分针 protected static GeneralPath minuteHand = new GeneralPath(); static { minuteHand.moveTo(50, 2); minuteHand.lineTo(53, 50); minuteHand.lineTo(50, 58); minuteHand.lineTo(47, 50); minuteHand.lineTo(50, 2); } // 创建秒针 protected static GeneralPath secondHand = new GeneralPath(); static { secondHand.moveTo(49, 5); secondHand.lineTo(51, 5); secondHand.lineTo(51, 62); secondHand.lineTo(49, 62); secondHand.lineTo(49, 5); } // 设置时钟的颜色 protected static Color faceColor = new Color(220, 220, 220); protected static Color hourColor = Color.red.darker(); protected static Color minuteColor = Color.blue.darker(); protected static Color secondColor = new Color(180, 180, 0); protected static Color pinColor = Color.gray.brighter(); // 创建时钟的枢纽 protected Ellipse2D pivot = new Ellipse2D.Float(47, 47, 6, 6); protected Ellipse2D centerPin = new Ellipse2D.Float(49, 49, 2, 2); // 创建绕时钟枢纽转的变换 protected AffineTransform hourTransform = AffineTransform.getRotateInstance(0, 50, 50); protected AffineTransform minuteTransform = AffineTransform.getRotateInstance(0, 50, 50); protected AffineTransform secondTransform = AffineTransform.getRotateInstance(0, 50, 50); // 创建每秒触发一次的Timer protected Timer timer = new Timer(1000, this); protected Calendar calendar = Calendar.getInstance(); public Clock() { setPreferredSize(new Dimension(100, 100)); } // 当plane加入container中时发生 public void addNotify() { super.addNotify(); timer.start(); } // 当plane从container中移处时发生 public void removeNotify() { timer.stop(); super.removeNotify(); } public void actionPerformed(ActionEvent event) { // 更新calender的时间 this.calendar.setTime(new java.util.Date()); int hours = this.calendar.get(Calendar.HOUR); int minutes = this.calendar.get(Calendar.MINUTE); int seconds = this.calendar.get(Calendar.SECOND); //设置变换，使得时针、分针、秒针各自按绕枢纽旋转一定的角度 hourTransform.setToRotation(((double) hours) * (Math.PI / 6.0), 50, 50); minuteTransform.setToRotation(((double) minutes) * (Math.PI / 30.0), 50, 50); secondTransform.setToRotation(((double) seconds) * (Math.PI / 30.0), 50, 50); repaint(); } public void paint(Graphics g) { super.paint(g); // 得到图形上下文和抗锯齿处理 Graphics2D g2 = (Graphics2D) g; g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON); g2.setPaint(faceColor); g2.fill(face); g2.setPaint(Color.black); g2.draw(face); // 产生钟面上12个滴答位置 for (double p = 0.0; p < 12.0; p += 1.0) { //利用变换画出同心的滴答的标线 g2.fill(tick.createTransformedShape( AffineTransform.getRotateInstance((Math.PI / 6.0) * p, 50, 50))); } g2.setPaint(hourColor); g2.fill(hourHand.createTransformedShape(hourTransform)); g2.setPaint(minuteColor); g2.fill(minuteHand.createTransformedShape(minuteTransform)); g2.setPaint(secondColor); g2.fill(secondHand.createTransformedShape(secondTransform)); g2.fill(pivot); g2.setPaint(pinColor); g2.fill(centerPin); } public static void main(String[] args) { JFrame frame = new JFrame(); frame.setLocation(700, 400); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.getContentPane().add(new Clock()); frame.pack(); frame.show(); } }

我把例子做了一些修改让他在swt的基础上运行。

java 代码

import java.awt.Color; import java.awt.Dimension; import java.awt.Graphics; import java.awt.Graphics2D; import java.awt.RenderingHints; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.awt.geom.AffineTransform; import java.awt.geom.Ellipse2D; import java.awt.geom.GeneralPath; import java.util.Calendar; import javax.swing.JPanel; import javax.swing.Timer; import org.eclipse.swt.SWT; import org.eclipse.swt.awt.SWT_AWT; import org.eclipse.swt.layout.FillLayout; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.Display; import org.eclipse.swt.widgets.Shell; public class Swt_awtClock extends JPanel implements ActionListener{ // 创建时钟的外形 protected static Ellipse2D face = new Ellipse2D.Float(3, 3, 94, 94); // 创建时钟的标记 protected static GeneralPath tick = new GeneralPath(); static { tick.moveTo(100, 100); tick.moveTo(49, 0); tick.lineTo(51, 0); tick.lineTo(51, 6); tick.lineTo(49, 6); tick.lineTo(49, 0); } // 创建时针 protected static GeneralPath hourHand = new GeneralPath(); static { hourHand.moveTo(50, 15); hourHand.lineTo(53, 50); hourHand.lineTo(50, 53); hourHand.lineTo(47, 50); hourHand.lineTo(50, 15); } // 创建分针 protected static GeneralPath minuteHand = new GeneralPath(); static { minuteHand.moveTo(50, 2); minuteHand.lineTo(53, 50); minuteHand.lineTo(50, 58); minuteHand.lineTo(47, 50); minuteHand.lineTo(50, 2); } // 创建秒针 protected static GeneralPath secondHand = new GeneralPath(); static { secondHand.moveTo(49, 5); secondHand.lineTo(51, 5); secondHand.lineTo(51, 62); secondHand.lineTo(49, 62); secondHand.lineTo(49, 5); } // 设置时钟的颜色 protected static Color faceColor = new Color(220, 220, 220); protected static Color hourColor = Color.red.darker(); protected static Color minuteColor = Color.blue.darker(); protected static Color secondColor = new Color(180, 180, 0); protected static Color pinColor = Color.gray.brighter(); // 创建时钟的枢纽 protected Ellipse2D pivot = new Ellipse2D.Float(47, 47, 6, 6); protected Ellipse2D centerPin = new Ellipse2D.Float(49, 49, 2, 2); // 创建绕时钟枢纽转的变换 protected AffineTransform hourTransform = AffineTransform.getRotateInstance(0, 50, 50); protected AffineTransform minuteTransform = AffineTransform.getRotateInstance(0, 50, 50); protected AffineTransform secondTransform = AffineTransform.getRotateInstance(0, 50, 50); // 创建每秒触发一次的Timer protected Timer timer = new Timer(1000, this); protected Calendar calendar = Calendar.getInstance(); public Swt_awtClock() { setPreferredSize(new Dimension(100, 100)); } // 当plane加入container中时发生 public void addNotify() { super.addNotify(); timer.start(); } // 当plane从container中移处时发生 public void removeNotify() { timer.stop(); super.removeNotify(); } public void actionPerformed(ActionEvent event) { // 更新calender的时间 this.calendar.setTime(new java.util.Date()); int hours = this.calendar.get(Calendar.HOUR); int minutes = this.calendar.get(Calendar.MINUTE); int seconds = this.calendar.get(Calendar.SECOND); //设置变换，使得时针、分针、秒针各自按绕枢纽旋转一定的角度 hourTransform.setToRotation(((double) hours) * (Math.PI / 6.0), 50, 50); minuteTransform.setToRotation(((double) minutes) * (Math.PI / 30.0), 50, 50); secondTransform.setToRotation(((double) seconds) * (Math.PI / 30.0), 50, 50); repaint(); } public void paint(Graphics g) { super.paint(g); // 得到图形上下文和抗锯齿处理 Graphics2D g2 = (Graphics2D) g; g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON); g2.setPaint(faceColor); g2.fill(face); g2.setPaint(Color.black); g2.draw(face); // 产生钟面上12个滴答位置 for (double p = 0.0; p < 12.0; p += 1.0) { //利用变换画出同心的滴答的标线 g2.fill(tick.createTransformedShape( AffineTransform.getRotateInstance((Math.PI / 6.0) * p, 50, 50))); } g2.setPaint(hourColor); g2.fill(hourHand.createTransformedShape(hourTransform)); g2.setPaint(minuteColor); g2.fill(minuteHand.createTransformedShape(minuteTransform)); g2.setPaint(secondColor); g2.fill(secondHand.createTransformedShape(secondTransform)); g2.fill(pivot); g2.setPaint(pinColor); g2.fill(centerPin); } public static void main(String[] args) { final Display display = new Display( ); final Shell shell = new Shell(display); shell.setText("Using Swing and AWT in Swt"); shell.setSize(135, 145); shell.setLayout(new FillLayout()); Composite composite = new Composite(shell, SWT.EMBEDDED); java.awt.Frame frame = SWT_AWT.new_Frame(composite); frame.setLocation(700, 400); // frame.getContentPane().add(new Swt_awtClock()); java.awt.Panel panel = new java.awt.Panel( ); frame.add(panel); panel.add(new Swt_awtClock()); frame.pack(); frame.show(); shell.open( ); while(!shell.isDisposed( )) { if (!display.readAndDispatch( )) display.sleep( ); } display.dispose( ); } }