Uso de ventana transparente en Java 6 y Java 7

Question

Estoy desarrollando una aplicación en Java 6 (1.6.0_24) que usa JFrame transparente para obtener la animación que desaparece. Aquí está mi código:

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); 
} 

Funciona bien en mi máquina, pero cuando lo probé en otro PC con Java 7 instalado error he barbecho:

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) 

Creo que es debido a que en Java 7 I debería usar Window.setOpacity(...) en lugar de AWTUtilities métodos.

¿Es posible utilizar la transparencia en la aplicación Java 6, que se ejecutará en Java 7?

Answer 1

Consulte How to Create Translucent and Shaped Windows .. Menciona una translucidez "por píxel" que puede aprovechar para hacer una ventana con java 7 que tiene la apariencia de la ventana translúcida de java 6 que ya no está disponible. Entonces, básicamente, tendrías que codificar para adaptarse a cualquiera de los dos, o podrías ir con una "translucidez uniforme" que funciona con ambos.