[Bug swing/28027] Wrong clip region in Swing repaints - overwrites other components

[roman at kennke dot org]

------- Comment #13 from roman at kennke dot org  2006-06-15 14:22 -------
The problem has been that Classpath indeed respected the isDoubleBuffered()
flag, and painted the component directly on the screen, but not to the Swing
double buffer. Now, when the RepaintManager decides that the GUI has to be
repainted, it blits the Swing double buffer on the screen, thus overwriting
what your component has drawn on it before. Most likely this is why Sun
'decided to use an extra buffering' even when a component is marked as not
beeing double buffered, if any parent of that component is double buffered, the
buffer and the screen get out of sync and you see the flickering that you've
seen.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28027