请教大家一个简单算法
问题是这样的显示5个图片在屏幕上
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25
1
当按下右键变成这样：（继续按左键就以此类推逆时针转）
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31
2
按下左键变成这样：（继续按左键就以此类推顺时针转）
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14
5
我的方法感觉比较笨重：
switch(listIndex){
case 0:
g.drawImage(0, 8, 100, Graphics.TOP | Graphics.LEFT);
g.drawImage(1, 8, 100, Graphics.TOP | Graphics.LEFT);
g.drawImage（2, 16, 80, Graphics.TOP | Graphics.LEFT);
g.drawImage(3, 120, 80, Graphics.TOP | Graphics.LEFT);
g.drawImage(4, 128, 100, Graphics.TOP | Graphics.LEFT);
break;
case 1:
g.drawImage(1, 8, 100, Graphics.TOP | Graphics.LEFT);
g.drawImage(2, 8, 100, Graphics.TOP | Graphics.LEFT);
g.drawImage(3, 16, 80, Graphics.TOP | Graphics.LEFT);
g.drawImage(4, 120, 80, Graphics.TOP | Graphics.LEFT);
g.drawImage(0, 128, 100, Graphics.TOP | Graphics.LEFT);
break;
case 2:g.drawImage(2, 8, 100, Graphics.TOP | Graphics.LEFT);
g.drawImage(3, 8, 100, Graphics.TOP | Graphics.LEFT);
g.drawImage(4, 16, 80, Graphics.TOP | Graphics.LEFT);
g.drawImage(0, 120, 80, Graphics.TOP | Graphics.LEFT);
g.drawImage(1, 128, 100, Graphics.TOP | Graphics.LEFT);
break;
case 3:g.drawImage(3, 8, 100, Graphics.TOP | Graphics.LEFT);
g.drawImage(4, 8, 100, Graphics.TOP | Graphics.LEFT);
g.drawImage(0, 16, 80, Graphics.TOP | Graphics.LEFT);
g.drawImage(1, 120, 80, Graphics.TOP | Graphics.LEFT);
g.drawImage(2, 128, 100, Graphics.TOP | Graphics.LEFT);
break;
case 4:g.drawImage(4, 8, 100, Graphics.TOP | Graphics.LEFT);
g.drawImage(0, 8, 100, Graphics.TOP | Graphics.LEFT);
g.drawImage(1, 16, 80, Graphics.TOP | Graphics.LEFT);
g.drawImage(2, 120, 80, Graphics.TOP | Graphics.LEFT);
g.drawImage(3, 128, 100, Graphics.TOP | Graphics.LEFT);
break;
}
按键改变listIndex的值
有没有简单点的算法呢！
[解决办法]
说一下我个人的看法.
如果图片比较少,这种方法是最简单直观的了.
如果拓展到N多图片,那么最好把图片们都放入一个数组中.好比images[].
设置一个偏移量d = 0;
g.drawImage(image[(0 + d) % n], 8, 100, Graphics.TOP | Graphics.LEFT);
g.drawImage(image[(1 + d) % n], 8, 100, Graphics.TOP | Graphics.LEFT);
g.drawImage(image[(2 + d) % n], 16, 80, Graphics.TOP | Graphics.LEFT);
g.drawImage(image[(3 + d) % n], 120, 80, Graphics.TOP | Graphics.LEFT);
......
......
......
g.drawImage(image[(n-1 + d) % n], 128, 100, Graphics.TOP | Graphics.LEFT);
按左右键分别对应d++,d--就OK了.
