在 Java 6 和 Java 7 中使用透明窗口

Question

我正在Java 6 (1.6.0_24) 中开发应用程序，它使用透明的JFrame 来获得消失的动画。这是我的代码：

public static void slowDisappearWindowAction(Window source, int milisSlow, int milisFast) throws InterruptedException{
    float level = 1.0f;
    //slow effect -> 50%
    for(int i=0; i<8 ; i++){
        level=level-0.05f;
        AWTUtilities.setWindowOpacity(source,level);
        Thread.sleep(milisSlow);
    }
    //fast effect -> 0% 
    for(int i=0; i<8 ; i++){
        level=level-0.05f;
        AWTUtilities.setWindowOpacity(source,level);
        Thread.sleep(milisFast);
    }
    AWTUtilities.setWindowOpacity(source,0.1f);
}

它在我的机器上运行良好，但是当我在另一台安装了Java 7 的 PC 上测试它时，我遇到了休闲错误：

 Exception in thread "AWT-EventQueue-0" java.awt.IllegalComponentStateException:
 The frame is decorated
    at java.awt.Frame.setOpacity(Unknown Source)
    at java.awt.Window$1.setOpacity(Unknown Source)
    at com.sun.awt.AWTUtilities.setWindowOpacity(Unknown Source)
    at pl.design.bead.pattern.model.window.WindowHelper.slowDisappearWindowAction(WindowHelper.java:21)
    at pl.design.bead.pattern.forms.MainForm$ExitController.windowClosing(MainForm.java:123)
    at java.awt.AWTEventMulticaster.windowClosing(Unknown Source)
    at java.awt.Window.processWindowEvent(Unknown Source)
    at javax.swing.JFrame.processWindowEvent(Unknown Source)
    at java.awt.Window.processEvent(Unknown Source)
    at java.awt.Component.dispatchEventImpl(Unknown Source)
    at java.awt.Container.dispatchEventImpl(Unknown Source)
    at java.awt.Window.dispatchEventImpl(Unknown Source)
    at java.awt.Component.dispatchEvent(Unknown Source)
    at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
    at java.awt.EventQueue.access$000(Unknown Source)
    at java.awt.EventQueue$3.run(Unknown Source)
    at java.awt.EventQueue$3.run(Unknown Source)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
    at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
    at java.awt.EventQueue$4.run(Unknown Source)
    at java.awt.EventQueue$4.run(Unknown Source)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
    at java.awt.EventQueue.dispatchEvent(Unknown Source)
    at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
    at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
    at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
    at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
    at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
    at java.awt.EventDispatchThread.run(Unknown Source)

我认为这是因为在Java 7 中我应该使用Window.setOpacity(...) 而不是AWTUtilities 方法。

可以在Java 6 应用程序中使用透明度，它将在Java 7 上运行？

Answer 1

请参阅How to Create Translucent and Shaped Windows.. 它提到了“每像素”半透明性，您可以利用它来使用 java 7 制作一个具有 java 6 中不再可用的半透明窗口的外观和感觉的窗口。因此，基本上您必须编写代码以适应其中任何一个，或者您可以使用适用于两者的“统一半透明”。