419347 - Two HCBT_MINMAX messages on minimize

Status: UNCONFIRMED

(Core :: Widget: Win32, defect)

Description

[David Brown]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 6.0; en-US; rv:1.8.1.12) Gecko/20080201 Firefox/2.0.0.12
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 6.0; en-US; rv:1.8.1.12) Gecko/20080201 Firefox/2.0.0.12

When minimizing Firefox, the window sends two HCBT_MINMAX messages instead of one.

Reproducible: Always

Steps to Reproduce:
1. Open Firefox
2. Minimize it
Actual Results:  
The Firefox window produces two HCBT_MINMAX messages

Expected Results:  
The Firefox window should only produce one HCBT_MINMAX message

Applications such as Spy++ don't appear to show HCBT messages. To verify this bug, you may need to use the C# sample that I was working on when I discovered it:

http://geekswithblogs.net/dbrown/archive/2008/02/24/detecting-when-any-window-has-been-minimized.aspx

Comment 1

[timeless]

um, i don't suppose you could get us stack traces to these two calls?
http://developer.mozilla.org/en/docs/How_to_get_a_stacktrace_with_WinDbg describes our symbol server....

stack traces would be most useful if generated based on a nightly build, http://ftp.mozilla.org/pub/mozilla.org/firefox/nightly/latest-trunk/

if it doesn't then there's nothing for us to do (the 2.x branch is only taking security fixes)

Comment 2

[David Brown]

Sorry, but I am unfamiliar with WinDbg and as this isn't a crash or a hang issue, I couldn't find any way to get a stacktrace.

I've also tested Firefox 3 Beta 3 and the latest nightly build and this issue still occurs. Again, sorry I can't be of more help.

Comment 3

[timeless]

to get a stack trace (.hh kp), use:
kp 
to set a breakpoint on X in library Q (.hh bp), use:
bp Q!X

a starting point is probably:
bp nsWindow::SetSizeMode

I don't suppose config.trim_on_minimize is true (check in about:config), if so, it's probably this:

http://bonsai.mozilla.org/cvsblame.cgi?file=/mozilla/widget/src/windows/nsWindow.cpp&rev=3.727&mark=4868#4865

you can download a version of that file from http://mxr.mozilla.org/seamonkey/source/widget/src/windows/nsWindow.cpp?raw=1 and use it with windbg and the symbol server to follow along once your breakpoint is hit.