[Mono-bugs] [Bug 78493][Cos] New - PictureBox erases draw area on redraw

bugzilla-daemon at bugzilla.ximian.com bugzilla-daemon at bugzilla.ximian.com
Tue May 23 12:38:10 EDT 2006

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Changed by armin.dressler at imk.fraunhofer.de.


--- shadow/78493	2006-05-23 12:38:10.000000000 -0400
+++ shadow/78493.tmp.6407	2006-05-23 12:38:10.000000000 -0400
@@ -0,0 +1,35 @@
+Bug#: 78493
+Product: Mono: Class Libraries
+Version: 1.1
+OS: SUSE 9.2
+OS Details: also on FedoraCore4
+Status: NEW   
+Priority: Cosmetic
+Component: Windows.Forms
+AssignedTo: peter at novonyx.com                            
+ReportedBy: armin.dressler at imk.fraunhofer.de               
+QAContact: mono-bugs at ximian.com
+TargetMilestone: ---
+Summary: PictureBox erases draw area on redraw
+Description of Problem:
+I spotted an annoying difference in a PictureBox redraw between .Net and mono:
+- Mono(Linux): When a PictureBox is redrawn, the area of the box is first
+erased  (filled with background color) and then redrawn. This results in a
+heavy flickering.
+- .Net(WindowsXP): The PictureBox is redrawn on top of the old picture (at
+least, it looks like that). This looks much smoother.
+Steps to reproduce the problem:
+1. Place a PictureBox in a form and create a bitmap
+2. provoke a redraw of the PictureBox
+I'll provide a little example app as an attachment.

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