JDK-6993784 : Clarification to shaped/translucent windows specification is required
  • Type: Bug
  • Component: client-libs
  • Sub-Component: java.awt
  • Affected Version: 7
  • Priority: P1
  • Status: Closed
  • Resolution: Fixed
  • OS: generic
  • CPU: generic
  • Submitted: 2010-10-21
  • Updated: 2017-05-16
  • Resolved: 2011-05-18
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JDK 7
7 b121Fixed
Related Reports
Duplicate :  
JDK-2200533 - Per-pixel transparency must only be available for undecorated frames/windows
Relates :  
JDK-6725365 - Per-pixel transparency must only be available for undecorated frames/windows
Relates :  
JDK-6862560 - Frame is becoming undecorated when setting its background to alpha value less then 255
Relates :  
JDK-6987849 - Border and title of JFrame are shown but not clickable for translucency + per-pixel translucency
Relates :  
JDK-7008106 - com/sun/awt/Translucency/WindowOpacity.java test fails just against jdk7 b122
Relates :  
JDK-6988428 - Shape is not applied sometimes
Relates :  
JDK-7020060 - [TEST_BUG] java/awt/FullScreen/TranslucentWindow/TranslucentWindow.java failed
Relates :  
JDK-6990924 - Applying shape to window leaves its border unaffected on Solaris
Relates :  
JDK-6987850 - When shaped window is resized it is gracelessly repainted
Description
According to development, spec is not ready and the feature behavior is going to change. See Comments for more details.

This is showstopper for testing.
I'm changing the synopsis of this CR as it's not completely correct. The specification for shaped and translucent window is there, but it should be slightly corrected:

1. All the effects (shapes, translucency) for decorated windows are prohibited.

2. Should clarify the behavior when exceptions are thrown. For example, in setBackground() we don't specify if the background color is changed or not, if the passed color alpha is less than 1.0f, but the corresponding translucency type is not supported.

3. The spec also contains some typos that should be corrected.

4. Specification for 'null' value for background color in Window.setBackground() should be added.
Comments
EVALUATION Specification for shaped & translucent windows should be extended to prohibit creating decorated shaped and/or non-opaque windows. In 6u10 we had this restriction (see com.sun.awt.AWTUtilities spec), but it was lost when fw-ported to 7
22-10-2010