[Mono-bugs] [Bug 79879][Maj] New - NRE displaying PropertyGrid

[bugzilla-daemon at bugzilla.ximian.com]

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Changed by monkey at jpobst.com.

http://bugzilla.ximian.com/show_bug.cgi?id=79879

--- shadow/79879	2006-11-09 13:04:41.000000000 -0500
+++ shadow/79879.tmp.11504	2006-11-09 13:04:41.000000000 -0500
@@ -0,0 +1,84 @@
+Bug#: 79879
+Product: Mono: Class Libraries
+Version: 1.1
+OS: 
+OS Details: 
+Status: NEW   
+Resolution: 
+Severity: 
+Priority: Major
+Component: Windows.Forms
+AssignedTo: toshok at ximian.com                            
+ReportedBy: monkey at jpobst.com               
+QAContact: mono-bugs at ximian.com
+TargetMilestone: ---
+URL: 
+Cc: 
+Summary: NRE displaying PropertyGrid
+
+Description of Problem:
+When you display a PropertyGrid, it crashes with a NullReferenceException.
+
+Steps to reproduce the problem:
+1. Run winforms/FormsTest
+2. Click the PropertyGrid tab
+
+Additional Information:
+Unhandled Exception: System.NullReferenceException: Object reference not
+set to an instance of an object
+  at System.Windows.Forms.PropertyGridInternal.PropertyGridView.OnPaint
+(System.Windows.Forms.PaintEventArgs e) [0x00000] 
+  at System.Windows.Forms.Control.WndProc (System.Windows.Forms.Message m)
+[0x00000] 
+  at System.Windows.Forms.ScrollableControl.WndProc
+(System.Windows.Forms.Message m) [0x00000] 
+  at System.Windows.Forms.Control+ControlNativeWindow.WndProc
+(System.Windows.Forms.Message m) [0x00000] 
+  at System.Windows.Forms.NativeWindow.WndProc (IntPtr hWnd, Msg msg,
+IntPtr wParam, IntPtr lParam) [0x00000] 
+  at (wrapper native-to-managed) System.Windows.Forms.NativeWindow:WndProc
+(intptr,System.Windows.Forms.Msg,intptr,intptr)
+  at <0x00000> <unknown method>
+  at (wrapper managed-to-native)
+System.Windows.Forms.XplatUIWin32:Win32UpdateWindow (intptr)
+  at System.Windows.Forms.XplatUIWin32.UpdateWindow (IntPtr handle) [0x00000] 
+  at System.Windows.Forms.XplatUI.UpdateWindow (IntPtr handle) [0x00000] 
+  at System.Windows.Forms.Control.Refresh () [0x00000] 
+  at System.Windows.Forms.TabControl.set_SelectedIndex (Int32 value) [0x00000] 
+  at System.Windows.Forms.TabControl.MouseDownHandler (System.Object
+sender, System.Windows.Forms.MouseEventArgs e) [0x00000] 
+  at (wrapper delegate-invoke)
+System.MulticastDelegate:invoke_void_object_MouseEventArgs
+(object,System.Windows.Forms.MouseEventArgs)
+  at System.Windows.Forms.Control.OnMouseDown
+(System.Windows.Forms.MouseEventArgs e) [0x00000] 
+  at System.Windows.Forms.Control.WndProc (System.Windows.Forms.Message m)
+[0x00000] 
+  at System.Windows.Forms.TabControl.WndProc (System.Windows.Forms.Message
+m) [0x00000] 
+  at System.Windows.Forms.Control+ControlNativeWindow.WndProc
+(System.Windows.Forms.Message m) [0x00000] 
+  at System.Windows.Forms.NativeWindow.WndProc (IntPtr hWnd, Msg msg,
+IntPtr wParam, IntPtr lParam) [0x00000] 
+  at (wrapper native-to-managed) System.Windows.Forms.NativeWindow:WndProc
+(intptr,System.Windows.Forms.Msg,intptr,intptr)
+  at <0x00000> <unknown method>
+  at (wrapper managed-to-native)
+System.Windows.Forms.XplatUIWin32:Win32DispatchMessage
+(System.Windows.Forms.MSG&)
+  at System.Windows.Forms.XplatUIWin32.DispatchMessage
+(System.Windows.Forms.MSG msg) [0x00000] 
+  at System.Windows.Forms.XplatUI.DispatchMessage (System.Windows.Forms.MSG
+msg) [0x00000] 
+  at System.Windows.Forms.Application.DispatchMessage
+(System.Windows.Forms.MSG msg) [0x00000] 
+  at System.Windows.Forms.Application.RunLoop (Boolean Modal,
+System.Windows.Forms.ApplicationContext context) [0x00000] 
+  at System.Windows.Forms.Application.Run (System.Windows.Forms.Form
+mainForm) [0x00000] 
+  at MonoCHelloWorld.Program.Main () [0x00000]
+
+Offending line in PropertyGridView.cs (208):
+DrawGridItems(property_grid.root_grid_item.GridItems, e, 1, ref yLoc);
+
+(property_grid is null)