JDK-6661455 : Toplevel windows are not curve like native in windows
  • Type: Bug
  • Component: client-libs
  • Sub-Component: java.awt
  • Affected Version: 6u10
  • Priority: P3
  • Status: Closed
  • Resolution: Fixed
  • OS: windows_xp
  • CPU: x86
  • Submitted: 2008-02-11
  • Updated: 2011-01-19
  • Resolved: 2008-02-14
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JDK 6
6u10 b12Fixed
Related Reports
Relates :  
JDK-6633275 - Need to support shaped/translucent windows
Relates :  
JDK-6668442 - transparency using JNA doesn't work
Description
I have a frame which contains a button, on clicking on the button a dialog is displayed. I can see that frame & dialog upper corners are not round either they are dark extra pixel is seen like a square. I have attached the screen shot. This works fine in 6u10 b11 promoted build. but fails in 6u10 b12 pit build . Hence its a regression introduced in pit build.

Step to reproduced:-
----------------------
1) Run the attached testcase.
2) You can see the frame. Observe that frame's top left & right corner are not round either an extra dark blue square can be seen. 
3) Click on the button to display a dialog. Observe that top left & right corner are not round either an extra dark blue square can be seen.  If you see the same then the bug is reproduced.
Comments
EVALUATION Seems that Windows sets a rectangular shape when invoking SetWindowRgn(). And then reshapes window (adding these fance curve corners) only on subsequent resize. A possible solution is to not invoke the SetWindowRgn() if no shape has been set by the user.
11-02-2008
EVALUATION After resizing the window, its shape gets restored to the default (with the curve corners).
11-02-2008
EVALUATION This is a regression caused by 6633275.
11-02-2008
SUGGESTED FIX --- old/src/share/classes/java/awt/Window.java 2008-02-11 15:00:28.000000000 +0300 +++ new/src/share/classes/java/awt/Window.java 2008-02-11 15:00:28.000000000 +0300 @@ -645,7 +645,9 @@ super.addNotify(); // Applying the effects - applyShape(); + if (shape != null) { + applyShape(); + } applyOpaque(); applyOpacity(); }
11-02-2008