[JAVA] 分享:地圖太大張怎辦?用拖的

[tomap41017 (絕夢)]

直接貼程式碼XD
小弟資質駑鈍試了幾個小時才成功= =

我的期末考阿......
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/**
 *
 */
package poomonopoly;

import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;

import javax.imageio.ImageIO;
import javax.swing.JPanel;

/**
 *
 */
public class ImagePanel extends JPanel {
    /**
     *
     */
    private static final long serialVersionUID = 1L;
    private BufferedImage image = null;
    private int X, Y;

    private class MD extends MouseAdapter {
        int initX, initY;

        @Override
        public void mousePressed(MouseEvent me) {
            initX = me.getX();
            initY = me.getY();
        }

        @Override
        public void mouseReleased(MouseEvent me) {
            int finalX, finalY;
            finalX = me.getX();
            finalY = me.getY();
            X += (finalX - initX);
            Y += (finalY - initY);
            repaint();
        }

    };

    public ImagePanel() {
        try {
            image = ImageIO.read(new File("map.jpg"));
        }
        catch (IOException e) {
            e.printStackTrace();
            System.exit(-1);
        }
        X = -image.getWidth() / 2;
        Y = -image.getHeight() / 2;//先初始在中央
        this.addMouseListener(new MD());
    }

    @Override
    protected void paintComponent(Graphics g) {
        super.paintComponent(g);
        g.drawImage(image, X, Y, this);
    }
}

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◆ From: 140.112.240.39
→ zenixls2:建議用MouseMotionListener實作，效果比較好
→ zenixls2:還有，記的測邊界
→ tomap41017:之前是用一樓去做，可能那時我寫的有BUG我就換成現在的
→ tomap41017:版本，至於邊界嘛XD再看看好了期末炸光= =
推 ArInbl:在Main要怎麼用這個
→ ArInbl:                  ImagePanel   ?