[Mono-bugs] [Bug 681654] New: Calling Application.DoEvents inside a modal ShowDialog lets events through

[bugzilla_noreply at novell.com]

https://bugzilla.novell.com/show_bug.cgi?id=681654

https://bugzilla.novell.com/show_bug.cgi?id=681654#c0


           Summary: Calling Application.DoEvents inside a modal ShowDialog
                    lets events through
    Classification: Mono
           Product: Mono: Class Libraries
           Version: 2.8.x
          Platform: x86
        OS/Version: Windows 7
            Status: NEW
          Severity: Normal
          Priority: P5 - None
         Component: Windows.Forms
        AssignedTo: mono-bugs at lists.ximian.com
        ReportedBy: xocotl at gmail.com
         QAContact: mono-bugs at lists.ximian.com
          Found By: ---
           Blocker: ---


User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US; rv:1.9.2.15)
Gecko/20110303 Firefox/3.6.15

If I use Application.DoEvents inside a modal ShowDialog, the dialog effectively
becomes non-modal in the sense that it allows me to click on things behind it
(at least on Windows).

Is this because DoEvents in XplatUI is just a generic PeekMessage loop, whereas
Application's RunLoop has a bunch of extras (which could be moved to a message
filter to make them run in the DoEvents)? Or is there something more
complicated?

In any case, this is a definite bug. In Windows I am able to call
Application.DoEvents and the dialog stays modal. Pretty serious since it makes
repainting during a long-running operation impractical.

Reproducible: Always

Steps to Reproduce:
1.
2.
3.

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