Using Swing and AWT in Swt

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( );
    }
}

评论

1 楼 rEloaD_cn 2008-01-11  

恩，关键就只有两行代码：
#         Composite composite = new Composite(shell, SWT.EMBEDDED); 
#  
#          java.awt.Frame frame = SWT_AWT.new_Frame(composite);