[Mono-bugs] [Bug 78542][Nor] New - Problem with Form.ShowDialog ()
inside a Click event handler.
bugzilla-daemon at bugzilla.ximian.com
bugzilla-daemon at bugzilla.ximian.com
Tue May 30 19:27:38 EDT 2006
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Changed by calberto.cortez at gmail.com.
http://bugzilla.ximian.com/show_bug.cgi?id=78542
--- shadow/78542 2006-05-30 19:27:38.000000000 -0400
+++ shadow/78542.tmp.19498 2006-05-30 19:27:38.000000000 -0400
@@ -0,0 +1,74 @@
+Bug#: 78542
+Product: Mono: Class Libraries
+Version: 1.0
+OS:
+OS Details:
+Status: NEW
+Resolution:
+Severity:
+Priority: Normal
+Component: Windows.Forms
+AssignedTo: peter at novonyx.com
+ReportedBy: calberto.cortez at gmail.com
+QAContact: mono-bugs at ximian.com
+TargetMilestone: ---
+URL:
+Cc:
+Summary: Problem with Form.ShowDialog () inside a Click event handler.
+
+Description of Problem:
+
+Displaying a Form using ShowDialog () instead of Show () inside a
+Control.Click event handler appears to confuse the event system, and more
+than one form is created.
+
+Steps to reproduce the problem:
+1. Copy the test below and compile.
+2. Click on the blue area (a simple Control instance).
+3. Click on the title bar of the new Form: new Forms will show up.
+
+// Sample
+using System;
+using System.Drawing;
+using System.Windows.Forms;
+
+public class Test
+{
+ static void Main ()
+ {
+ Form form = new Form ();
+ Control control = new Control ();
+ control.BackColor = Color.AliceBlue; // We need to identify
+the control area
+ control.Location = new Point (15, 15);
+ control.Size = new Size (56, 56);
+ control.Click += OnClick;
+ form.Controls.Add (control);
+
+ Application.Run (form);
+ }
+
+ // Calling form.Show () instead of form.ShowDialog ()
+ // doesn't show any problem
+ static void OnClick (object o, EventArgs args)
+ {
+ Form form = new Form ();
+ form.ShowDialog (); // This line causes the problem
+ form.Close ();
+ }
+}
+// End of sample
+
+
+Actual Results:
+It looks like the event handler is called more than one time per Click.
+
+Expected Results:
+In .Net 2.0 the problem doesn't exist. Just one time the event handler is
+called per Click event.
+
+How often does this happen?
+Always.
+
+Additional info:
+Mono and libgdiplus from svn.
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