Using transparent window in both Java 6 and Java 7
java, java-7, jdk6, swing, transparency
Solution
See How to Create Translucent and Shaped Windows.. It mentions a "per pixel" translucency that you can leverage to make a window with java 7 that has the look and feel of the translucent window from java 6 which is no longer available. So basically you'd have to code to accommodate either, or you could go with a "uniform translucency" which works with both.
Problem
I'm developing application in `Java 6` (1.6.0_24) which using transparent `JFrame` to get disappearing animation. Here is my code: ``` 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); } ``` It works fine on my machine, but when I tested it on another PC with `Java 7` installed I have fallowing error: ``` 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) ``` I think it is because in `Java 7` I should use `Window.setOpacity(...)` instead of `AWTUtilities` methods. It is possible to use transparency in `Java 6` app, that will run on `Java 7` ?