jdk7透明异形窗体_JAVA_编程开发_程序员俱乐部

在jdk6中设置透明异形窗体的方法与jdk7方法的比较

Method in Java SE 6 Update 10 JDK 7 Equivalent AWTUtilities.isTranslucencySupported(Translucency) GraphicsDevice.isWindowTranslucencySupported(WindowTranslucency) AWTUtilities.isTranslucencyCapable(GraphicsConfiguration) GraphicsConfiguration.isTranslucencyCapable() AWTUtilities.setWindowOpacity(Window, float) Window.setOpacity(float) AWTUtilities.setWindowShape(Window, Shape) Window.setShape(Shape) AWTUtilities.setWindowOpaque(boolean) Window.setBackground(Color) Passing new Color(0,0,0,alpha) to this method, wherealpha is less than 255, installs per-pixel translucency.

monospace; white-space: pre; font-size: 16px;">jdk7判断操作系统是否支持透明窗体的设置

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class="dp-xml">
1. //?Determine?what?the?default?GraphicsDevice?can?support.??
2. ????????GraphicsEnvironment?ge?=?GraphicsEnvironment??
3. ????????????????.getLocalGraphicsEnvironment();??
4. ????????GraphicsDevice?gd?=?ge.getDefaultScreenDevice();??
5. ??
6. ????????boolean?isUniformTranslucencySupported?=?gd??
7. ????????????????.isWindowTranslucencySupported(TRANSLUCENT);//是否支持全部统一透明度的窗体??
8. ??????????
9. ????????boolean?isPerPixelTranslucencySupported?=?gd??
10. ????????????????.isWindowTranslucencySupported(PERPIXEL_TRANSLUCENT);//是否每部分不同透明度的窗体??
11. ??????????
12. ????????boolean?isShapedWindowSupported?=?gd??
13. ????????????????.isWindowTranslucencySupported(PERPIXEL_TRANSPARENT);//是否支持异性窗体??
14. ??????????
15. ????????System.out.println("isUniformTranslucencySupported:"+isUniformTranslucencySupported);??
16. ????????System.out.println("isPerPixelTranslucencySupported:"+isPerPixelTranslucencySupported);??
17. ????????System.out.println("isShapedWindowSupported:"+isShapedWindowSupported);??

?

1.统一透明度窗体的设置

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1. GraphicsEnvironment?ge?=?GraphicsEnvironment??
2. ????????????????.getLocalGraphicsEnvironment();??
3. ????????GraphicsDevice?gd?=?ge.getDefaultScreenDevice();??
4. ??
5. ????????boolean?isUniformTranslucencySupported?=?gd??
6. ????????????????.isWindowTranslucencySupported(TRANSLUCENT);//是否支持全部统一透明度的窗体??
7. ????????if(isUniformTranslucencySupported)??
8. ????????{??
9. ????????????JFrame.setDefaultLookAndFeelDecorated(true);??
10. ????????????JFrame?jf=new?JFrame("统一透明度");??
11. ????????????jf.setLayout(new?GridBagLayout());??
12. ????????????Button?bu=new?Button("这是个按钮");??
13. ????????????jf.add(bu);??
14. ????????????jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);??
15. ????????????jf.setBounds(100,?60,?200,?300);??
16. ????????????jf.setOpacity(0.8f);??
17. ????????????jf.setVisible(true);??
18. ????????}??

?

刚开始一直弄官方例子http://download.oracle.com/javase/tutorial/uiswing/misc/trans_shaped_windows.html，发现一直报错

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1. Exception?in?thread?"AWT-EventQueue-0"?java.awt.IllegalComponentStateException:?The?frame?is?decorated??
2. ????at?java.awt.Frame.setOpacity(Unknown?Source)??

原来setOpacity方法说明

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1. The?TRANSLUCENT?translucency?must?be?supported?by?the?underlying?system??
2. The?window?must?be?undecorated?(see?setUndecorated(boolean)?and?Dialog.setUndecorated(boolean))??
3. The?window?must?not?be?in?full-screen?mode?(see?GraphicsDevice.setFullScreenWindow(Window))??

1.操作系统必须支持设置透明方法
2.窗体必须未修饰（无标题栏）
3.窗体必须非全屏模式

加上一句

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1. JFrame.setDefaultLookAndFeelDecorated(true);?