34930 - Should flicker while switching to mozilla

Status: VERIFIED INVALID

(Core Graveyard :: GFX, defect, P3)

Description

[Jesse Ruderman]

Steps to reproduce:
1. Open two maximized browser windows to http://bugzilla.mozilla.org/ without 
scrolling the document at all.
2. Click on one of them on the taskbar
3. Click on the other one.
4. Close the window that's up.

Expected results:
At steps 3 and 4, I expect a slight but visible "flicker".  Most other Win32 
programs (Internet Explorer, Netscape 4.x, notepad) show a flicker, and Windows 
users are accustomed to seeing one when they switch tasks.

Actual results:
Whenever you switch TO a mozilla window (from another mozilla window or an IE 
window with similar content), the titlebar flickers but the chrome and content 
area don't.

Several situations where this might be a problem:
- I realize that I have two windows open to the same site and want to close one 
of them.  I close it, and I don't think anything happened, so I click the "x" 
again and lose my other window.
- A website opens another window without me asking, so I'm less likely to 
notice because of the lack of screen flicker.

Comment 1

[Kevin McCluskey (gone)]

We double-buffer the display to remove flicker during painting in general. 
Marking Invalid, because this is an optimization that most apps should do.

Comment 2

[Chris Petersen]

Marking verified invalid.

Comment 3

[Jesse Ruderman]

I don't know if you can really call it an "optimization" to take away flicker 
while switching to mozilla, given that
a) mozilla is a lot slower to switch to than most programs
b) it removes almost all indication that you have closed a window