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RichardW2C
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Width read-only
Jul 20th, 2011 at 10:41am
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Hi

When I try to drag and drop a component from the toolbox to the xaml designer, like a SahpeNode, I have an error message saying "The property 'Width' is read-only and cannot be changed".
  
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Stoyo
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Re: Width read-only
Reply #1 - Jul 20th, 2011 at 11:04am
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Hi,

How have you managed to add a ShapeNode to the toolbox? It does not derive from Control and should not appear there when you add the diagramming.wpf.dll assembly to the toolbox.

Stoyan
  
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RichardW2C
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Re: Width read-only
Reply #2 - Jul 20th, 2011 at 12:16pm
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Well, not sure. So I reset the toolbox and dropped the dll. Now I see various layouts in the toolbox, is that ok? What should appear here?
  
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Stoyo
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Re: Width read-only
Reply #3 - Jul 20th, 2011 at 1:21pm
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Oh, now I see VS2010 shows the nodes indeed, it probably shows all FrameworkElement derived classes, while older versions only showed controls. Nodes don't really have a settable Width, but a Rect Bounds property, and it seems VS decides to assign some value to Width after drag and drop anyway. You could add nodes through Xaml instead:

Code
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<diag:Diagram ...>
	<diag:ShapeNode Bounds="40,40,50,50" Shape="Ellipse" />
</diag:Diagram>
  
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RichardW2C
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Re: Width read-only
Reply #4 - Jul 20th, 2011 at 1:55pm
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When I try that:

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<Window x:Class="MaquetteConsole.MainWindow"
	  xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:diag="http://mindfusion.eu/diagramming/wpf"
    Title="Maquette Console" Width="1200" Height="600"
Loaded="OnWindowLoaded">
    <Grid>
	  <Grid.RowDefinitions>
		<RowDefinition Height="Auto">  </RowDefinition>
		<RowDefinition></RowDefinition>
	  </Grid.RowDefinitions>

	  <Label Name="Etiq" Grid.Row="0">Glop</Label>

	  <ScrollViewer Grid.Row="1">
		    <diag:Diagram Name="diagram"
BackBrush="White"
ShapeBrush="LightBlue"
DefaultShape="Rectangle">
		    <diag:ShapeNode Bounds="40,40,50,50" Shape="Ellipse" />
		</diag:Diagram>
		</ScrollViewer>
    </Grid>

</Window>


It compiles and works, but the designer windows show an error message: "The document constains erros that must be fixed before the designer can be loaded".

In the XAML windows, all the diag part inside the ScrollViewer is underlined, and the error tooltip says : "Object reference not set to an instance of an object".
  
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Stoyo
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Re: Width read-only
Reply #5 - Jul 20th, 2011 at 7:09pm
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Try adding the initial node from the code-behind for the being. We'll check what happens when we add Width and Height setters in the next couple of days.
  
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RichardW2C
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Re: Width read-only
Reply #6 - Jul 21st, 2011 at 12:39pm
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Ok, thanks.
  
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