[Mono-bugs] [Bug 371905] New: TabControl UserPaint does not work

bugzilla_noreply at novell.com bugzilla_noreply at novell.com
Mon Mar 17 18:42:47 EDT 2008


           Summary: TabControl UserPaint does not work
           Product: Mono: Class Libraries
           Version: 1.2.6
          Platform: PC
        OS/Version: Windows XP
            Status: NEW
          Severity: Normal
          Priority: P5 - None
         Component: Windows.Forms
        AssignedTo: mono-bugs at lists.ximian.com
        ReportedBy: derekd at omni-ts.com
         QAContact: mono-bugs at lists.ximian.com
                CC: stephane at omni-ts.com
          Found By: ---

Created an attachment (id=202665)
 --> (https://bugzilla.novell.com/attachment.cgi?id=202665)
TabControl doesn't call OnPaint

If deriving from TabControl, the new class will not have OnPaint called.

Steps to reproduce:
1. Derive a class out of TabControl
2. In the new class, override OnPaint and make paint it yellow
3. Add the new tab control to a form
4. Run

Tab controls appears without the designated paint job

Expected results:
The derived class should have had OnPaint called.

In the Mono Managed.Windows.Forms code, see
System.Windows.Forms.TabControl.OnPaintInternal(). That method sets a value,
pe.Handled = true;  This 'true' prohibits the calling of OnPaint in the calling
method Control.WmPaint()

For a test, I commented out the pe.Handled=true in
TabControl.OnPaintInternal(), and I got the expected results.

I have attached test code.

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