StrataFrame Forum » StrataFrame Application Framework - V1 » WinForms (How do I?) » Odd ThemedSplitContainer Behavior

Odd ThemedSplitContainer Behavior

Bill Cunnien — Fri, 07 Nov 2008 10:29:40 GMT

If I minimize a form that has this control on it (orientation: horizontal), then restore the form, I get the following error:

[quote]
System.ArgumentException was unhandled by user code
Message="Rectangle '{X=0,Y=70,Width=0,Height=4}' cannot have a width or height equal to 0."
Source="System.Drawing"
StackTrace:
at System.Drawing.Drawing2D.LinearGradientBrush..ctor(Rectangle rect, Color color1, Color color2, LinearGradientMode linearGradientMode) at MicroFour.StrataFrame.UI.Windows.Forms.ThemedSplitContainer.RenderHorizontalBar(Graphics DrawObj) at MicroFour.StrataFrame.UI.Windows.Forms.ThemedSplitContainer.OnPaint(PaintEventArgs e) at System.Windows.Forms.Control.PaintTransparentBackground(PaintEventArgs e, Rectangle rectangle, Region transparentRegion) at System.Windows.Forms.Control.PaintTransparentBackground(PaintEventArgs e, Rectangle rectangle) at System.Windows.Forms.Control.PaintBackground(PaintEventArgs e, Rectangle rectangle, Color backColor, Point scrollOffset) at System.Windows.Forms.Control.PaintBackground(PaintEventArgs e, Rectangle rectangle) at System.Windows.Forms.Control.OnPaintBackground(PaintEventArgs pevent) at System.Windows.Forms.ScrollableControl.OnPaintBackground(PaintEventArgs e) at System.Windows.Forms.Control.PaintWithErrorHandling(PaintEventArgs e, Int16 layer, Boolean disposeEventArgs) at System.Windows.Forms.Control.WmEraseBkgnd(Message& m) at System.Windows.Forms.Control.WndProc(Message& m) at System.Windows.Forms.ScrollableControl.WndProc(Message& m) at System.Windows.Forms.Control.ControlNativewindow.OnMessage(Message& m) at System.Windows.Forms.Control.ControlNativewindow.WndProc(Message& m) at System.Windows.Forms.Nativewindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
InnerException:
[/quote]

How would I correct this problem?

Thanks,
Bill

RE: Odd ThemedSplitContainer Behavior

Bill Cunnien — Fri, 07 Nov 2008 10:29:40 GMT

Will do. Thanks.

RE: Odd ThemedSplitContainer Behavior

Trent L. Taylor — Fri, 07 Nov 2008 09:23:35 GMT

Just add a test that if the WIdth is <= 0 then bail...there is nothing to render.

RE: Odd ThemedSplitContainer Behavior

Bill Cunnien — Fri, 07 Nov 2008 07:02:09 GMT

I added the Try-Catch block as Trent suggested. The form is behaving better. Since the try-catch block basically is doing nothing but bypassing the bad code, may I ask what is the code supposed to be doing? Just trying to understand why things work the way they do.

[codesnippet]
Private Sub RenderHorizontalBar(ByVal DrawObj As Graphics)
    '-- Establish Locals
    Try
        Dim loRect As New Rectangle(0, Me.SplitterDistance, Me.Width, Me.SplitterWidth) <---this is the line that bombs, Me.Width = 0
        Dim loBar As New LinearGradientBrush(loRect, _DrawGradientBegin, _DrawGradientEnd, _DrawHorizontalGradientDirection)
    [ CODE SNIPPED ]
    Catch ex As Exception

End Try
End Sub
[/codesnippet]

Thanks!
Bill

RE: Odd ThemedSplitContainer Behavior

Bill Cunnien — Thu, 06 Nov 2008 13:20:28 GMT

What version are you using when you run the project?

RE: Odd ThemedSplitContainer Behavior

Trent L. Taylor — Thu, 06 Nov 2008 09:30:17 GMT

I'm sorry, but I cannot reproduce this which means that it has already been addressed. I am not sure if the most recently posted beta has this in it or not at this point, I will have to research when this was fixed, whic to be honest, I think was a while back. But in any case, it would require an update of your assemblies. Here would be my suggestion for your immediate resolution, just open the SF source, and in teh OnPaint, place a Try/Catch around the entire OnPaint. We actually fixed this differently, but this will resolve your problem and get you going down your current path.

The next SF beta will be a bigger update because all of the BO partial classes will have to be rebuilt as the property type descriptors are different (for the better) now. So in any case, you will probably just wnt to fix what you have since you are in the middle of testing (from what I gather).

RE: Odd ThemedSplitContainer Behavior

Bill Cunnien — Thu, 06 Nov 2008 07:18:54 GMT

Thanks, Ivan. Not urgent, but the window is already well into the testing phase, so to restructure it would be a big task. For now, the users have been instructed that the workaround is to simply not minimize that window. Not the best workaround from a user standpoint, but knowing the Strataframe gurus, it will not be long before they have a fix prepared.

RE: Odd ThemedSplitContainer Behavior

Ivan George Borges — Wed, 05 Nov 2008 16:07:48 GMT

Hey Bill.

I tested over here and got the error. It looks like a problem with a the TabControl, when you Dock the SplitContainer to it. Without a TabControl, it works fine docked. With a TabControl, it works fine undocked. So, if it is urgent, you could try one of these scenarios.

RE: Odd ThemedSplitContainer Behavior

Bill Cunnien — Wed, 05 Nov 2008 15:12:21 GMT

Run the app, minimize the form, then restore the form. The app fails on two different systems in our office, so I am not suspecting a local environment problem. I'd rather not update to the beta unless I have to. Are you unable to reproduce the behavior, still?

RE: Odd ThemedSplitContainer Behavior

Trent L. Taylor — Wed, 05 Nov 2008 12:57:18 GMT

How do you reproduce the error with your sample? It is not failing, so I am guessing that your assemblies are not up to date. If I need to do something to force the error, then please let me know. Thanks.

RE: Odd ThemedSplitContainer Behavior

Bill Cunnien — Wed, 05 Nov 2008 11:41:59 GMT

here's the sample

RE: Odd ThemedSplitContainer Behavior

Trent L. Taylor — Wed, 05 Nov 2008 10:07:12 GMT

How are you producing this error. I can see the stack trace, but this is a control that has extensive use and is something that we use ourselves extensively. We had our QA department turn in an issue a while back where the panel size was becoming 0 in width or height and produced an error. This has since been fixed. So you are welcome to post a sample so we can make sure that you are just not using up to date assemblies or that there is not an issue elsewhere. That would probably be the best avenue to travel. Just like anything else, if we see it in a reproducable state, you are going to get answers much faster since we will be able to trace and see the point of failure. Thanks.

RE: Odd ThemedSplitContainer Behavior

Bill Cunnien — Wed, 05 Nov 2008 09:55:47 GMT

I am using the most current, non-Beta version.

RE: Odd ThemedSplitContainer Behavior

Dustin Taylor — Wed, 05 Nov 2008 09:29:42 GMT

The first thing to do is to ensure you are on the latest version of the software. There was a similar issue we fixed a couple of versions ago that may be manifesting in the way you are describing. If you update to the latest version and still experience the behavior we'll take a closer look at it, but I don't think there is an issue here.