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POMVVM Light EventToCommand Not Working with CaptureMouse
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  1. POMVVM Light EventToCommand Not Working with CaptureMouse
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    copied!<p>I'm having some trouble with the EventToCommand not behaving as I would expect with CaptureMouse.</p> <p>I have a ResizeGrip that I've defined several EventToCommand's on:</p> <pre><code>&lt;ResizeGrip Name="ResizeGrip" HorizontalAlignment="Right" VerticalAlignment="Bottom" Cursor="SizeNWSE"&gt; &lt;i:Interaction.Triggers&gt; &lt;i:EventTrigger EventName="MouseLeftButtonDown"&gt; &lt;cmd:EventToCommand Command="{Binding ResizeStartCommand}" PassEventArgsToCommand="True" /&gt; &lt;/i:EventTrigger&gt; &lt;i:EventTrigger EventName="MouseLeftButtonUp"&gt; &lt;cmd:EventToCommand Command="{Binding ResizeStopCommand}" PassEventArgsToCommand="True" /&gt; &lt;/i:EventTrigger&gt; &lt;i:EventTrigger EventName="MouseMove"&gt; &lt;cmd:EventToCommand Command="{Binding ResizeCommand}" PassEventArgsToCommand="True" /&gt; &lt;/i:EventTrigger&gt; &lt;/i:Interaction.Triggers&gt; &lt;/ResizeGrip&gt; </code></pre> <p>The handling functions are set in the constructor of the class:</p> <pre><code>ResizeStartCommand = new RelayCommand&lt;MouseButtonEventArgs&gt;( (e) =&gt; OnRequestResizeStart(e)); ResizeStopCommand = new RelayCommand&lt;MouseButtonEventArgs&gt;( (e) =&gt; OnRequestResizeStop(e)); ResizeCommand = new RelayCommand&lt;MouseEventArgs&gt;( (e) =&gt; OnRequestResize(e), param =&gt; CanResize); </code></pre> <p>And finally I do all my logic to resize:</p> <pre><code>void OnRequestResizeStart(MouseButtonEventArgs e) { bool r = Mouse.Capture((UIElement)e.Source); Console.WriteLine("mouse down: " + r.ToString()); } void OnRequestResizeStop(MouseButtonEventArgs e) { ((UIElement)e.Source).ReleaseMouseCapture(); _canResize = false; } void OnRequestResize(MouseEventArgs e) { Console.WriteLine("mouse move"); } bool CanResize { get { return _canResize; } } </code></pre> <p>The OnRequestResizeStart &amp; OnRequestResizeStop commands are working fine, and the OnRequestResize works... but only when I am actually over the ResizeGrip. It does not appear that the CaptureMouse is not actually sending all the mouse events to the ResizeGrip.</p> <p>Is this a limitation of the EventToCommand, or does something special need to occur?</p> <p>Thanks for any help!</p>
 

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