java图片滚动处理

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java图片滚动处理30

代码如下，bug是：1.当score从9增至10时，十位数不发生滚动。
2.当图片滚动到大于一半路程时，会突然不滚动，直接到达目标位置。
3.图片出现在setClip区域外（图片是30*32分辨率，bug3处）
图片和源代码在附件里面。

package myJava;

import java.awt.*;
import javax.swing.*;

public class Test extends JFrame{
	public static void main(String args[]){
		JFrame mainTask = new JFrame();
		mainTask.setSize(120,120);
		mainTask.add(new Canvas(),BorderLayout.CENTER);
		mainTask.setResizable(false);
		mainTask.setVisible(true);
		mainTask.setLocationRelativeTo(null);
		mainTask.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
	}
}
class Inf {
	public static final String NUM_DIR = "num/";
	public static final Image[] number= {
		new ImageIcon(Inf.class.getResource(NUM_DIR+"number_0.gif")).getImage(),
		new ImageIcon(Inf.class.getResource(NUM_DIR+"number_1.gif")).getImage(),
		new ImageIcon(Inf.class.getResource(NUM_DIR+"number_2.gif")).getImage(),
		new ImageIcon(Inf.class.getResource(NUM_DIR+"number_3.gif")).getImage(),
		new ImageIcon(Inf.class.getResource(NUM_DIR+"number_4.gif")).getImage(),
		new ImageIcon(Inf.class.getResource(NUM_DIR+"number_5.gif")).getImage(),
		new ImageIcon(Inf.class.getResource(NUM_DIR+"number_6.gif")).getImage(),
		new ImageIcon(Inf.class.getResource(NUM_DIR+"number_7.gif")).getImage(),
		new ImageIcon(Inf.class.getResource(NUM_DIR+"number_8.gif")).getImage(),
		new ImageIcon(Inf.class.getResource(NUM_DIR+"number_9.gif")).getImage(),
	};
	private static final int x0 = 0;
	private static final int y0 = 21;
	public static int score = 8;
	private static int[] lastScoreBit = {score%10,score%100/10,score%1000/100,score/1000};
	private static int[] y = {0,0,0,0};
	public static void drawScore(Graphics g){
		int[] scoreBit = {score%10,score%100/10,score%1000/100,score/1000};
		g.setClip(x0,y0,x0+120,y0+32);   //bug3
		for(int i=0;i<scoreBit.length;i++)
		{
			if(lastScoreBit[i]==scoreBit[i])
				g.drawImage(Inf.number[scoreBit[i]],x0+90-30*i,y0,null);
			else
			{	
				g.drawImage(Inf.number[lastScoreBit[i]],x0+90,y0-y[i],null);
				g.drawImage(Inf.number[scoreBit[i]],x0+90,y0+32-y[i],null);
				System.out.println("y[0]="+y[0]);
				//score进位时 差时滚动的处理
				if((i==0 || (y[i-1]>y0/2 || y[i]>y0/2)) && y0==y[i]++)
				{
					lastScoreBit[i] = scoreBit[i];
					y[i]=0;
				}
			}
		}
	}
}

class Canvas extends JPanel implements Runnable{
	private static int i = 0;
	Canvas(){
		new Thread(this).start();
	}
	@Override
	public void run(){
		while(true){
			try{
				Thread.sleep(40);
			}
			catch(Exception e){}
			if(i++%50==0)
				Inf.score++;
			repaint();
		}
	}
	@Override
	public void paintComponent(Graphics g){
		Inf.drawScore(g);
		g.setClip(0,0,this.getWidth(),this.getHeight());
	}
}

问题补充：第2个bug我解决了，呵呵，49行改成if((i==0 || (y[i-1]>y0/2 || y[i]>y0/2)) && 32==y[i]++)

问题补充：第1个bug我也解决了，45、46行改成
gOffScreen.drawImage(Img.number[lastScoreBit[i]],x0+90-30*i,y0-y[i],null);
gOffScreen.drawImage(Img.number[scoreBit[i]],x0+90-30*i,y0+32-y[i],null);
请问大家第三个bug是为什么啊？

问题补充：第3个bug也解决了……38行改成g.setClip(x0,y0,30,32);
setClip的四个参数分别是x，y，w，h
汗……我这么二。。。

Java 图片滚动

2012年6月17日 13:13

IO_oI
0
0 0 3

myJava.zip (43.6 KB)
下载次数: 24

package myJava;

import java.awt.BorderLayout;
import java.awt.Graphics;
import java.awt.Image;

import javax.swing.ImageIcon;
import javax.swing.JFrame;
import javax.swing.JPanel;

@SuppressWarnings("serial")
public class Test extends JFrame{
public static void main(String args[]){
JFrame mainTask = new JFrame();
mainTask.setSize(120,120);
mainTask.add(new Canvas(),BorderLayout.CENTER);
mainTask.setResizable(false);
mainTask.setVisible(true);
mainTask.setLocationRelativeTo(null);
mainTask.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
}
class Inf {
public static final String NUM_DIR = "num/";
public static final Image[] number= {
new ImageIcon(Inf.class.getResource(NUM_DIR+"number_0.gif")).getImage(),
new ImageIcon(Inf.class.getResource(NUM_DIR+"number_1.gif")).getImage(),
new ImageIcon(Inf.class.getResource(NUM_DIR+"number_2.gif")).getImage(),
new ImageIcon(Inf.class.getResource(NUM_DIR+"number_3.gif")).getImage(),
new ImageIcon(Inf.class.getResource(NUM_DIR+"number_4.gif")).getImage(),
new ImageIcon(Inf.class.getResource(NUM_DIR+"number_5.gif")).getImage(),
new ImageIcon(Inf.class.getResource(NUM_DIR+"number_6.gif")).getImage(),
new ImageIcon(Inf.class.getResource(NUM_DIR+"number_7.gif")).getImage(),
new ImageIcon(Inf.class.getResource(NUM_DIR+"number_8.gif")).getImage(),
new ImageIcon(Inf.class.getResource(NUM_DIR+"number_9.gif")).getImage(),
};
private static final int x0 = 0;
private static final int y0 = 21;
public static int score = 8;
private static int[] lastScoreBit = {score%10,score%100/10,score%1000/100,score/1000};
private static int[] y = {0,0,0,0};
public static void drawScore(Graphics g){
int[] scoreBit = {score%10,score%100/10,score%1000/100,score/1000};
g.setClip(x0,y0,x0+120,y0+32);
for(int i=0;i<scoreBit.length;i++)
{
if(lastScoreBit[i]==scoreBit[i])
g.drawImage(Inf.number[scoreBit[i]],x0+90-30*i,y0,null);
else
{
g.drawImage(Inf.number[lastScoreBit[i]],x0+90,y0-y[i],null);
g.drawImage(Inf.number[scoreBit[i]],x0+90,y0,null);
System.out.println("y[0]="+y[0]);
//score进位时差时滚动的处理
if((i==0 || (y[i-1]>y0/2 || y[i]>y0/2)) && y0==y[i]++)
{
lastScoreBit[i] = scoreBit[i];
y[i]=0;
}
}
}
}
}

@SuppressWarnings("serial")
class Canvas extends JPanel implements Runnable{
private static int i = 0;
Canvas(){
new Thread(this).start();
}
public void run(){
while(true){
try{
Thread.sleep(40);
}
catch(Exception e){}
if(i++%50==0)
Inf.score++;
repaint();
}
}
public void paintComponent(Graphics g){
Inf.drawScore(g);
g.setClip(0,0,this.getWidth(),this.getHeight());
}
}