[Mono-winforms-list] Handle being created when I don't expect
Maser, Dan
Dan.Maser at inin.com
Wed Aug 8 17:48:37 EDT 2007
Sorry, that got sent too early. Here's more of the call stack this
time.
> _____________________________________________
> From: Maser, Dan
> Sent: Wednesday, August 08, 2007 4:39 PM
> To: 'mono-winforms-list at lists.ximian.com'
> Subject: Handle being created when I don't expect
>
>
> I've got a situation with MDI forms where the behavior is different
> on MS vs mono, but it's proving difficult to get a simple test project
> that reproduces it. The problem is that in my app setting the
> Form.MdiParent is causing that Form's handle to be created in mono
> when it doesn't on MS.NET. And it doesn't happen for simple test
> programs on mono either; with simple test programs setting the
> MdiParent property doesn't cause the handle to be created. I think it
> must be something about my real project that causes this, but the
> program is so large it's difficult to tell what that might be. Here's
> a partial call stack from the Form.HandleCreated event. Does this
> info give enough info to someone to make some guesses about what could
> cause the MdiParent property to trigger the HandleCreated in some
> projects but not in others?
>
> Thanks in advance for any ideas!
>
> Partial call stack:
>
> at MyChildForm.on_HandleCreated(System.Object sender, System.EventArgs
> e)
> at System.Windows.Forms.Control.OnHandleCreated(System.EventArgs e)
> at System.Windows.Forms.Form.OnHandleCreated(System.EventArgs e)
> at System.Windows.Forms.Control.WmCreate(Message ByRef m)
> at System.Windows.Forms.Control.WndProc(Message ByRef m)
> at System.Windows.Forms.ScrollableControl.WndProc(Message ByRef m)
> at System.Windows.Forms.ContainerControl.WndProc(Message ByRef m)
> at System.Windows.Forms.Form.WndProc(Message ByRef m)
> at System.Windows.Forms.Control+ControlWindowTarget.OnMessage(Message
> ByRef m)
> at System.Windows.Forms.Control+ControlNativeWindow.WndProc(Message
> ByRef m)
> at System.Windows.Forms.NativeWindow.WndProc(IntPtr hWnd, Msg msg,
> IntPtr wParam, IntPtr lParam)
> at System.Windows.Forms.XplatUIX11.SendMessage(IntPtr hWnd, Msg msg,
> IntPtr wParam, IntPtr lParam)
at
System.Windows.Forms.XplatUIX11.CreateWindow(System.Windows.Forms.Create
Params cp)
at
System.Windows.Forms.XplatUI.CreateWindow(System.Windows.Forms.CreatePar
ams cp)
at
System.Windows.Forms.NativeWindow.CreateHandle(System.Windows.Forms.Crea
teParams create_params)
at System.Windows.Forms.Control.CreateHandle()
at System.Windows.Forms.Form.CreateHandle()
at System.Windows.Forms.Control.WmDestroy(Message ByRef m)
at System.Windows.Forms.Control.WndProc(Message ByRef m)
at System.Windows.Forms.ScrollableControl.WndProc(Message ByRef m)
at System.Windows.Forms.ContainerControl.WndProc(Message ByRef m)
at System.Windows.Forms.Form.WmDestroy(Message ByRef m)
at System.Windows.Forms.Form.WndProc(Message ByRef m)
at System.Windows.Forms.Control+ControlWindowTarget.OnMessage(Message
ByRef m)
at System.Windows.Forms.Control+ControlNativeWindow.WndProc(Message
ByRef m)
at System.Windows.Forms.NativeWindow.WndProc(IntPtr hWnd, Msg msg,
IntPtr wParam, IntPtr lParam)
at System.Windows.Forms.XplatUIX11.SendMessage(IntPtr hWnd, Msg msg,
IntPtr wParam, IntPtr lParam)
at System.Windows.Forms.XplatUIX11.DestroyWindow(IntPtr handle)
at System.Windows.Forms.XplatUI.DestroyWindow(IntPtr handle)
at System.Windows.Forms.NativeWindow.DestroyWindow()
at System.Windows.Forms.Control.DestroyHandle()
at System.Windows.Forms.Control.RecreateHandle()
at System.Windows.Forms.Form.set_MdiParent(System.Windows.Forms.Form
value)
....
There's more, but this seems like the relevant part.
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