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POGridSplitter overrides ColumnDefinition's style trigger?
 

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    <p>I ran into a strange issue...<br> It looks like resizing Grid's columns using a GridSplitter disables (or otherwise deactivates) the trigger defined on a Grid's column.</p> <p>Here's my setup:</p> <p>A Grid has 3 columns, defined as follows:</p> <pre><code>&lt;Grid.ColumnDefinitions&gt; &lt;ColumnDefinition Width="*" /&gt; &lt;ColumnDefinition&gt; &lt;ColumnDefinition.Style&gt; &lt;Style&gt; &lt;Setter Property="ColumnDefinition.Width" Value="Auto"/&gt; &lt;Style.Triggers&gt; &lt;DataTrigger Binding="{Binding Path=OpenItemViewModels.Count}" Value="0"&gt; &lt;Setter Property="ColumnDefinition.Width" Value="0"/&gt; &lt;/DataTrigger&gt; &lt;/Style.Triggers&gt; &lt;/Style&gt; &lt;/ColumnDefinition.Style&gt; &lt;/ColumnDefinition&gt; &lt;ColumnDefinition&gt; &lt;ColumnDefinition.Style&gt; &lt;Style&gt; &lt;Setter Property="ColumnDefinition.Width" Value="4*"/&gt; &lt;Style.Triggers&gt; &lt;DataTrigger Binding="{Binding Path=OpenItemViewModels.Count}" Value="0"&gt; &lt;Setter Property="ColumnDefinition.Width" Value="0"/&gt; &lt;/DataTrigger&gt; &lt;/Style.Triggers&gt; &lt;/Style&gt; &lt;/ColumnDefinition.Style&gt; &lt;/ColumnDefinition&gt; &lt;/Grid.ColumnDefinitions&gt; </code></pre> <p>The expectation is that when there are no items that constitute ItemsSource for the control in the <em>third</em> column, 0 width will be assigned to the second and third columns (hosting the GridSplitter and the auxiliary items control, respectively). </p> <p>This works well as long as I don't touch the Splitter (when all the tabs in the auxiliary control are closed, only the first column remains visible).<br> The problems start if I move the splitter, thus effectively changing the proportion between columns ##0 and 2. In such scenario, these columns' width is not reset when all the items in the right-hand control are closed. </p> <p>I suspect this has something to do with the GridSplitter "overruling" my definitions in XAML.</p> <p>Can someone please confirm / disprove this theory, and suggest how to work around the problem?</p>
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