https://bugzilla.novell.com/show_bug.cgi?id=402703
Summary: StatusBar: various collection bugs
Product: Mono: Class Libraries
Version: 1.9.0
Platform: Other
OS/Version: Other
Status: NEW
Severity: Normal
Priority: P5 - None
Component: Windows.Forms
AssignedTo: [EMAIL PROTECTED]
ReportedBy: [EMAIL PROTECTED]
QAContact: [email protected]
Found By: ---
PropertyGrid cannot edit the StatusBarPanelCollection of StatusBar.Panels, for
two reasons:
1) The internal list is lazy-initialized and is not initialized when the first
call is to the IList.CopyTo method, thus NRE.
2) Because CollectionEditor uses IList.Add which accesses the internal list
directly the panel is not initialized (see AddInternal). Thus a
NullReferenceException occurs at paint in
DrawStatusBarPanel/DrawStatusBarPanelBackground (accessing the panel.Parent
property), see exception below.
Other applications that use those methods will fail too.
Paint exception in 1.9 below. In current code the problem is hit in
DrawStatusBarPanelBackground.
[[
Unhandled Exception: System.NullReferenceException: Object reference not set to
an instance of an object
at System.Windows.Forms.ThemeWin32Classic.DrawStatusBarPanel
(System.Drawing.Graphics,System.Drawing.Rectangle,int,System.Drawing.Brush,System.Windows.Forms.StatusBarPanel)
<0x00188>
at System.Windows.Forms.ThemeWin32Classic.DrawStatusBar
(System.Drawing.Graphics,System.Drawing.Rectangle,System.Windows.Forms.StatusBar)
<0x00f67>
at System.Windows.Forms.StatusBar.Draw
(System.Drawing.Graphics,System.Drawing.Rectangle) <0x000a1>
at System.Windows.Forms.StatusBar.OnPaintInternal
(System.Windows.Forms.PaintEventArgs) <0x000b2>
at System.Windows.Forms.Control.WmPaint (System.Windows.Forms.Message&)
<0x0009b>
at System.Windows.Forms.Control.WndProc (System.Windows.Forms.Message&)
<0x001e2>
at System.Windows.Forms.StatusBar.WndProc (System.Windows.Forms.Message&)
<0x0000d>
at ControlWindowTarget.OnMessage (System.Windows.Forms.Message&) <0x00014>
at ControlNativeWindow.WndProc (System.Windows.Forms.Message&) <0x00022>
at System.Windows.Forms.NativeWindow.WndProc
(intptr,System.Windows.Forms.Msg,intptr,intptr) <0x0015c>
at System.Windows.Forms.XplatUIWin32.InternalWndProc
(intptr,System.Windows.Forms.Msg,intptr,intptr) <0x00046>
at (wrapper native-to-managed)
System.Windows.Forms.XplatUIWin32.InternalWndProc
(intptr,System.Windows.Forms.Msg,intptr,intptr) <0x00065>
at (wrapper managed-to-native)
System.Windows.Forms.XplatUIWin32.Win32DispatchMessage
(System.Windows.Forms.MSG&) <0x00004>
at System.Windows.Forms.XplatUIWin32.DispatchMessage
(System.Windows.Forms.MSG&) <0x0000a>
at System.Windows.Forms.XplatUI.DispatchMessage (System.Windows.Forms.MSG&)
<0x00015>
at System.Windows.Forms.Application.RunLoop
(bool,System.Windows.Forms.ApplicationContext) <0x0099f>
at System.Windows.Forms.Application.Run
(System.Windows.Forms.ApplicationContext) <0x0004c>
at System.Windows.Forms.Application.Run (System.Windows.Forms.Form) <0x00022>
at StatusBarIList.Main () <0x00264>
]]
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