[Mono-bugs] [Bug 376081] New: Control should Invalidate children with transparent BackColor

bugzilla_noreply at novell.com bugzilla_noreply at novell.com
Tue Apr 1 17:40:22 EDT 2008


           Summary: Control should Invalidate children with transparent
           Product: Mono: Class Libraries
           Version: 1.9.0
          Platform: Other
        OS/Version: All
            Status: NEW
          Severity: Normal
          Priority: P5 - None
         Component: Windows.Forms
        AssignedTo: mono-bugs at lists.ximian.com
        ReportedBy: alex.conway at linea-research.co.uk
         QAContact: mono-bugs at lists.ximian.com
          Found By: ---

Description of Problem:

when a Control has children which have BackColor set to Color.Transparent or a
Colour with an alphablend component, the children do not get invalidated when
the parent is.

Steps to reproduce the problem:
1. compile and run the test case:
mcs -r:System.Windows.Forms,System.Drawing TransparentInvalidate.cs

Actual Results:
The Child label doesn't invalidate when the parent Form does

Expected Results:

The Chlid label should be invalidated when it's parent is

How often does this happen? 

always on mono

Additional Information:

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