main.java

java screenpen,包括一些最基本的功能,有实际作用,也可作为初学的参考资料.

/*
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 * and open the template in the editor.
 */
package screenpen;

import java.awt.AWTException;
import java.awt.Color;
import java.awt.Graphics;
import java.awt.Rectangle;
import java.awt.Robot;
import java.awt.Toolkit;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.awt.event.MouseMotionListener;
import java.awt.image.BufferedImage;
import java.util.ArrayList;
import java.util.List;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.swing.JFrame;
import javax.swing.JWindow;

/**
 *
 * @author zhaolin
 */
public class Main extends JWindow {

    private Robot r;

    public BufferedImage getImage() {
        return image;
    }

    public void setImage(BufferedImage image) {
        this.image = image;
    }
    private BufferedImage image;
    private Rectangle rect;
    private Line current;
    private List<Line> history;

    public Main() {
        current = new Line();
        history = new ArrayList<Line>();
        try {
            r = new Robot();
        } catch (AWTException ex) {
            Logger.getLogger(Main.class.getName()).log(Level.SEVERE, null, ex);
        }
        new ImageUpdateThread(this).start();
        
        this.addMouseListener(new MouseListener() {

            public void mouseClicked(MouseEvent e) {
            }

            public void mousePressed(MouseEvent e) {
                current.setX1(e.getX());
                current.setY1(e.getY());
                setVisible(false);
                //r.mouseMove(e.getXOnScreen(), e.getYOnScreen());
                int buttonMask = 0;
                switch(e.getButton()){
                    case MouseEvent.BUTTON1:buttonMask = MouseEvent.BUTTON1_MASK;break;
                    case MouseEvent.BUTTON2:buttonMask = MouseEvent.BUTTON2_MASK;break;
                    case MouseEvent.BUTTON3:buttonMask = MouseEvent.BUTTON3_MASK;break;
                    
                }
                r.mousePress(buttonMask);
                updateImage();
                setVisible(true);
            }

            public void mouseReleased(MouseEvent e) {
                setVisible(false);
                //r.mouseMove(e.getXOnScreen(), e.getYOnScreen());
                int buttonMask = 0;
                switch(e.getButton()){
                    case MouseEvent.BUTTON1:buttonMask = MouseEvent.BUTTON1_MASK;break;
                    case MouseEvent.BUTTON2:buttonMask = MouseEvent.BUTTON2_MASK;break;
                    case MouseEvent.BUTTON3:buttonMask = MouseEvent.BUTTON3_MASK;break;
                    
                }
                r.mouseRelease(buttonMask);
                setVisible(true);
            }

            public void mouseEntered(MouseEvent e) {
            //throw new UnsupportedOperationException("Not supported yet.");
            }

            public void mouseExited(MouseEvent e) {
            //throw new UnsupportedOperationException("Not supported yet.");
            }
            });
        this.addMouseMotionListener(new MouseMotionListener() {

            public void mouseDragged(MouseEvent e) {
                current.setX2(e.getX());
                current.setY2(e.getY());
                history.add((Line) current.clone());
                repaint();
                current.setX1(e.getX());
                current.setY1(e.getY());
            }

            public void mouseMoved(MouseEvent e) {
            //throw new UnsupportedOperationException("Not supported yet.");
            }
        });
        this.setSize((int) Toolkit.getDefaultToolkit().getScreenSize().getWidth(), (int) Toolkit.getDefaultToolkit().getScreenSize().getHeight());
        this.setVisible(true);
    }

    public void paint(Graphics g) {
        super.paint(g);
        g.drawImage(image, 0, 0, this);
        for (Line l : history) {
            l.paintMySelf(image.getGraphics());
        }
    }

    public BufferedImage capScreen() {
        rect = new Rectangle();
        rect.x = 0;
        rect.y = 0;
        rect.width = (int) Toolkit.getDefaultToolkit().getScreenSize().getWidth();
        rect.height = (int) Toolkit.getDefaultToolkit().getScreenSize().getHeight();
        return r.createScreenCapture(rect);
    }

    public void updateImage() {
        this.image = capScreen();
    }

    public static void main(String[] args) {
        new Main();
    }
}