Name: dbT83986 Date: 03/17/99


I would not say this is a problem. But major improvement in AWT.

Peer implementation of window in windows has background being painted with default color. As per my understanding windows
DK has message called WM_ERASEBKGND which erases with specified back ground color and it will send a paint message for
the window. Because of this reason entire window gets validated and needs to be repainted. If user can have option to have
whether to erase back ground or to just to paint over will increase performance.

We are writing a considerably huge application which has lot of (light weight)windows, when any other window is moved over or
this frame is resized we see the back ground being erased and repainted.

I have worked with Win SDK , I do know that by blocking WM_ERASEBKGND and managing properly would increase performance
of painting. This will also improve performance on JDesktopPane which is very solve in moving JInternalFrame's right now.
(Review ID: 55679)
======================================================================