[Mono-bugs] [Bug 80387][Maj] New - Showing a Form in a ListView.DoubleClick handler gets the double-click state 'stuck'

bugzilla-daemon at bugzilla.ximian.com bugzilla-daemon at bugzilla.ximian.com
Thu Dec 28 14:40:23 EST 2006

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Changed by dan.maser at inin.com.


--- shadow/80387	2006-12-28 14:40:23.000000000 -0500
+++ shadow/80387.tmp.4005	2006-12-28 14:40:23.000000000 -0500
@@ -0,0 +1,58 @@
+Bug#: 80387
+Product: Mono: Class Libraries
+Version: 1.2
+OS: RHEL 2.1
+OS Details: RHEL kernel 2.6.9-42 on i686 
+Status: NEW   
+Priority: Major
+Component: Windows.Forms
+AssignedTo: toshok at ximian.com                            
+ReportedBy: Dan.Maser at inin.com               
+QAContact: mono-bugs at ximian.com
+TargetMilestone: ---
+Summary: Showing a Form in a ListView.DoubleClick handler gets the double-click state 'stuck'
+Please fill in this template when reporting a bug, unless you know what 
+you are doing.
+Description of Problem:
+  I'm using the mono tarball version 1.2.20061228.  If you have a 
+ListView control and a DoubleClick handler and show another form in 
+response to the DoubleClick, it confuses some state variable or 
+something.  After you dismiss the DoubleClick form, all subsequent single 
+clicks on the ListView are triggering the DoubleClick handler again.  If 
+you use a non-ListView control or don't show another form in the handler 
+it doesn't seem to cause a problem.
+Steps to reproduce the problem:
+1. Create a simple WinForms app and put a ListView control on it.  Create 
+a DoubleClick handler on the ListView.
+2. In the DoubleClick handler, add a System.Console.WriteLine so you can 
+tell when it is double clicked.  Verify that there is no problems.
+3. Add this to the ListView.DoubleClick handler:
+         Form f = new Form();
+         f.ShowDialog();
+Actual Results:
+   The first time you double click the ListView, a blank form is shown. 
+Dismiss the form with the close box.  Now, single-clicking on the 
+ListView will make the DoubleClick handler invoke.  It happens every time 
+you single click from then on.
+Expected Results:
+   Dismissing the blank form should take focus back to the ListView and 
+single clicks should not invoke the DoubleClick handler.
+How often does this happen? 
+   It happens every time a Form is shown from the ListView.DoubleClick 
+handler.  It doesn't seem to happen with other controls or in other 
+Additional Information:
+  I compiled the mono-1.2.20061228 tarball myself on this system using 
+command "gmcs.exe /reference:System.Windows.Forms.dll /reference:System.Dr
+awing.dll test1.cs" and execute it with the command "mono test1.exe"

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