最新下载
热门教程
- 1
- 2
- 3
- 4
- 5
- 6
- 7
- 8
- 9
- 10
如何制作透明组件。
时间:2008-01-12 编辑:简简单单 来源:一聚教程网
希望与大家分享经验。
package com.borland.samples.welcome;
import java.awt.*;
public class MyPanel extends Panel {
private Image bi; // offscreen image
private Graphics big; // Graphics for the offscreen image
public void update(Graphics g) {
paint(g);
}
public void paint(Graphics g) {
if (bi == null) { // you can't do this from the constructor
bi = createImage(getSize().width,getSize().height);
big = bi.getGraphics();
}
Rectangle area = g.getClipBounds(); // this is the area that needs to be (re)painted (no need to repaint everything)
big.setClip(area);
big.clearRect(area.x, area.y, area.width, area.height); // fills the area with the background color // the next statement will call the paint methods for the other panels/components you have added to this panel // and draw them to the offscreen image
super.paint(big);// now draw the offscreen image to the panel
g.drawImage(bi,area.x, area.y, area.x+area.width, area.y+area.height,area.x, area.y, area.x+area.width, area.y+area.height,this);
}
}
-
上一个: JAVA的声音处理方法 (转自伊氏女人)
相关文章
- SpringBoot测试配置属性与web启动环境解析 10-24
- vue中将el-switch值true、false改为number类型的1和0解析 10-24
- Vue中的路由配置项meta使用解读 10-24
- SpringBoot自定义bean绑定解析 10-24
- SpringBoot常用计量与bean属性校验和进制数据转换规则解析 10-24
- 工厂方法在Spring框架中的运用介绍 10-24