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POUse Radial Panel in Listbox, throwing exception VisualTree Single Element
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copied!<p>I have a very simple radial panel with a few dependency properties like so:</p> <pre><code>public static readonly DependencyProperty RadiusProperty = DependencyProperty.Register("Radius", typeof(double), typeof(CircularPanel), new PropertyMetadata(50.0, new PropertyChangedCallback(RadiusChanged))); private static void RadiusChanged(DependencyObject sender, DependencyPropertyChangedEventArgs e) { ((CircularPanel)sender).Refresh(); } </code></pre> <p>The problem is that whenever I assign this radial panel as the itemspanel of a listbox I get an exception:</p> <p><strong>VisualTree of ItemsPanelTemplate must be a single element.</strong></p> <p>This is how I set the ItemsPanel in XAML:</p> <pre><code><ItemsPanelTemplate x:Key="ItemsPanelTemplate2"> <WpfApplication7:CircularPanel d:LayoutOverrides="Width, Height" AngleItem="{Binding Angle}" AnimationDuration="75" Radius="0" InitialAngle="90"/> </ItemsPanelTemplate> <ListBox ItemsPanel="{StaticResource ItemsPanelTemplate2}" ItemContainerStyle="{StaticResource ListBoxItemStyle1}" ItemsSource="{Binding Hosts, Mode=OneWay}" > </code></pre> <p>If I remove the PropertyChangedCallback function of the dependency properties, the panel works but since I cant refresh the panel, whenever I change the collection bound to the listbox, all the items are drawn on top of each other rather than in a circular manner. This is in WPF. I've tried in silverlight and there is no problem there.</p> <p>Appreciate Your Help. Thanks</p>

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