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POEditable WPF treeview item on doubleclick? (with styles?)
 

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    <p>I'm a bit of a WPF noob, so apologies for any inherent daftness in this question (!)</p> <p>I'm trying to enable editing of WPF treeview labels with a doubleclick - I've googled around this, and it looks like the two ways of doing this are with a custom control or with a style which hides one of a TextBox/TextBlock.</p> <p>Using a style to set the label to be a textBox based on a DataTrigger seems easy enough (eg 1 below), but it means that any time a row is selected, it's 'being edited'.</p> <p>What I'd really like to do is to enable this (Transition to textbox) on a mousedoubleclick event, but it seems that EventTriggers can't be used in the manner below, because they're transient. (It doesn't seem I can simply use the DoubleClick event in codebehind, because that doesn't (??) allow me to affect the displayed controls to show / hide the textboxes).</p> <p>Using a full blown custom control seems like the alternative - there's an AAALMOST working example here ( <a href="http://www.codeproject.com/KB/WPF/editabletextblock.aspx" rel="nofollow noreferrer">http://www.codeproject.com/KB/WPF/editabletextblock.aspx</a> ), however it doesn't work in the presence of HierachicalDataTemplate clauses (and it doesn't look like a solution is forthcoming).</p> <p>(eg 1 - switch from textblock to textbox when selected)</p> <pre><code>&lt;Window x:Class="treetest.Window1" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:local="clr-namespace:treetest" Title="Window1" Height="300" Width="300"&gt; &lt;Window.Resources&gt; &lt;Style x:Key="EditableContentControl" TargetType="{x:Type ContentControl}"&gt; &lt;Setter Property="ContentTemplate"&gt; &lt;Setter.Value&gt; &lt;DataTemplate DataType="{x:Type local:CompositeViewModel}"&gt; &lt;TextBlock Text="{Binding Path=Name}" /&gt; &lt;/DataTemplate&gt; &lt;/Setter.Value&gt; &lt;/Setter&gt; &lt;Style.Triggers&gt; &lt;DataTrigger Binding="{Binding Path=IsSelected,RelativeSource=RelativeSource AncestorType={x:Type TreeViewItem}}}" Value="True"&gt; &lt;Setter Property="ContentTemplate"&gt; &lt;Setter.Value&gt; &lt;DataTemplate DataType="{x:Type local:CompositeViewModel}"&gt; &lt;TextBox Text="{Binding Path=Name,UpdateSourceTrigger=PropertyChanged}" /&gt; &lt;/DataTemplate&gt; &lt;/Setter.Value&gt; &lt;/Setter&gt; &lt;/DataTrigger&gt; &lt;/Style.Triggers&gt; &lt;/Style&gt; &lt;/Window.Resources&gt; &lt;Grid&gt; &lt;TreeView Margin="12,12,115,12" Name="treeView1" ItemsSource="{Binding Path=GetRootData}" &gt; &lt;TreeView.ItemTemplate&gt; &lt;HierarchicalDataTemplate DataType="{x:Type local:CompositeViewModel}" ItemsSource="{Binding Path=Children}"&gt; &lt;ContentControl Content="{Binding}" Style="{StaticResource EditableContentControl}"/&gt; &lt;/HierarchicalDataTemplate&gt; &lt;/TreeView.ItemTemplate&gt; &lt;/TreeView&gt; &lt;/Grid&gt; &lt;/Window&gt; </code></pre>
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