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POWPF - Binding IsMouseOver to Visibility
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  1. POWPF - Binding IsMouseOver to Visibility
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    copied!<p>I have a window which overrides a <code>RadioButton</code>'s <code>ControlTemplate</code> to show a custom control inside of it. Inside the custom control, I have a button's visibility tied to <code>IsMouseOver</code>, which works correctly in showing the button only when the mouse is hovering over the control. However, when I click on the <code>RadioButton</code>, the <code>Button</code> disappears. After some debugging and reading, it seems that the <code>RadioButton</code> is capturing the mouse on click, and this makes <code>IsMouseOver</code> for the <code>UserControl</code> false.</p> <p>I tried binding the <code>Button</code>'s visibility to <code>FindAncestor {x:Type RadioButton}</code> and it works, but it seems a bit fragile to me to have the <code>UserControl</code> depend on who is containing it. The code for the window and the user control is below. Any suggestions?</p> <pre><code>&lt;Window x:Name="window" x:Class="WPFTest.Window1" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:WPFTest="clr-namespace:WPFTest" Title="Window1" Height="300" Width="300"&gt; &lt;Window.Resources&gt; &lt;Style TargetType="{x:Type RadioButton}"&gt; &lt;Setter Property="Template"&gt; &lt;Setter.Value&gt; &lt;ControlTemplate TargetType="{x:Type RadioButton}"&gt; &lt;WPFTest:TestUC /&gt; &lt;/ControlTemplate&gt; &lt;/Setter.Value&gt; &lt;/Setter&gt; &lt;/Style&gt; &lt;/Window.Resources&gt; &lt;Border BorderBrush="Black" BorderThickness="2"&gt; &lt;StackPanel&gt; &lt;RadioButton x:Name="OptionButton" Height="100" /&gt; &lt;TextBlock Text="{Binding ElementName=OptionButton, Path=IsMouseOver}" /&gt; &lt;/StackPanel&gt; &lt;/Border&gt; &lt;/Window&gt; &lt;UserControl x:Name="_this" x:Class="WPFTest.TestUC" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Height="300" Width="300"&gt; &lt;UserControl.Resources&gt; &lt;BooleanToVisibilityConverter x:Key="BooleanToVisibilityConverter" /&gt; &lt;/UserControl.Resources&gt; &lt;StackPanel&gt; &lt;TextBlock Text="SomeText" /&gt; &lt;TextBlock Text="{Binding ElementName=_this, Path=IsMouseOver}" /&gt; &lt;Button x:Name="_cancelTextBlock" Content="Cancel" Visibility="{Binding ElementName=_this, Path=IsMouseOver, Converter={StaticResource BooleanToVisibilityConverter}}" /&gt; &lt;/StackPanel&gt; &lt;/UserControl&gt; </code></pre>
 

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