[Mono-bugs] [Bug 79190][Nor] New - Setting Control.Top after Control.Location doesn't work

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Changed by kuba.brecka at gmail.com.

http://bugzilla.ximian.com/show_bug.cgi?id=79190

--- shadow/79190	2006-08-27 17:25:19.000000000 -0400
+++ shadow/79190.tmp.24098	2006-08-27 17:25:19.000000000 -0400
@@ -0,0 +1,70 @@
+Bug#: 79190
+Product: Mono: Class Libraries
+Version: 1.1
+OS: GNU/Linux [Other]
+OS Details: Slackware, KDE
+Status: NEW   
+Resolution: 
+Severity: 
+Priority: Normal
+Component: Windows.Forms
+AssignedTo: peter at novonyx.com                            
+ReportedBy: kuba.brecka at gmail.com               
+QAContact: mono-bugs at ximian.com
+TargetMilestone: ---
+URL: 
+Cc: 
+Summary: Setting Control.Top after Control.Location doesn't work
+
+This is a very weird bug, and it seems it only happens on Linux (I am able
+to reproduce it on Slackware Linux, using KDE). Using SVN head, the
+following code reproduces the bug.
+
+Excepted result:
+When you click the first button, the second button should move to the left
+of the first one. When you click the first button again, nothing should
+happen. This is how the program behaves on Windows, using both Mono and MS.NET.
+
+Actual result (on Linux):
+When you click the first button, the second button moves to the left of the
+first one. But when you click the first button again, the second button
+moves 15px to the bottom. When you click it again, it moves back. It seems
+like every second time the marked line in the code is ignored.
+
+Reproduce code:
+using System;
+using System.Drawing;
+using System.Collections.Generic;
+using System.Windows.Forms;
+
+namespace MonoTest22
+{
+    public class Form1 : Form
+    {
+        static void Main()
+        {
+            Application.Run(new Form1());
+        }
+
+        Button B1, B2;
+        public Form1()
+        {
+            B1 = new Button();
+            B1.Location = new Point(0, 0);
+            B1.Size = new Size(150, 30);
+            B1.Click += new EventHandler(B1_Click);
+            Controls.Add(B1);
+
+            B2 = new Button();
+            B2.Location = new Point(0, 30);
+            B2.Size = new Size(150, 30);
+            Controls.Add(B2);
+        }
+
+        void B1_Click(object sender, EventArgs e)
+        {
+            B2.Location = new Point(150, 15);
+            B2.Top -= 15; // MARKED LINE
+        }
+    }
+}