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2012-10-03T08:05:00.160
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2012-10-03T11:13:20.467
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<p>You could try to make the UserControl have one top-level child, like a ContentControl for example, and apply the style to the ContentControl instead. That way, you wouldn't get recursions.</p> <p>EDIT : The below is from the original questioner......</p> <p>Here is my attempt to do what you suggest. For some reason my DataTriggers never apply the template.... not sure what I did wrong here.</p> <p>Here is the whole XAML trying it with a contained ContentControl : </p> <pre><code><UserControl x:Class="XDPClient.Controls.EventMarkerControl" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:Controls="clr-namespace:XDPClient.Controls" mc:Ignorable="d" d:DesignHeight="513" d:DesignWidth="695" x:Name="uc"> <UserControl.Resources>  <ControlTemplate x:Key="Up" TargetType="{x:Type ContentControl}"> <Grid>  <Path Stretch="Fill" Fill="#FFFFFFFF" Stroke="#FF6800FF" StrokeThickness="3" StrokeStartLineCap="Flat" StrokeEndLineCap="Flat" StrokeLineJoin="Miter" StrokeMiterLimit="4" Name="rect2985" RenderTransformOrigin="0,0"> <Path.Data> <PathGeometry FillRule="Nonzero" Figures="M 0,250 L 0,50 L 150,50 L 200,-0.96 L 250,50 L 400,50 L 400,250 L 0,250z" /> </Path.Data> </Path>  <Grid> <Grid.RowDefinitions> <RowDefinition Height="1*" /> <RowDefinition Height="4*" /> </Grid.RowDefinitions> <Grid Grid.Row="1" Margin="3"> <ContentPresenter Grid.Row="1" HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" VerticalAlignment="{TemplateBinding VerticalContentAlignment}" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/> </Grid> </Grid> <Grid.BitmapEffect> <DropShadowBitmapEffect /> </Grid.BitmapEffect> </Grid> </ControlTemplate>  <ControlTemplate x:Key="Down" TargetType="{x:Type ContentControl}"> <Grid>  <Path Stretch="Fill" Fill="#FFFFFFFF" Stroke="#FF6800FF" StrokeThickness="3" StrokeStartLineCap="Flat" StrokeEndLineCap="Flat" StrokeLineJoin="Miter" StrokeMiterLimit="4" Name="rect2985" RenderTransformOrigin="0,0"> <Path.Data> <PathGeometry FillRule="Nonzero" Figures="M 0,250 L 0,50 L 150,50 L 200,-0.96 L 250,50 L 400,50 L 400,250 L 0,250z" /> </Path.Data> <Path.RenderTransform> <ScaleTransform ScaleX="-1" /> </Path.RenderTransform> </Path>  <Grid> <Grid.RowDefinitions> <RowDefinition Height="1*" /> <RowDefinition Height="4*" /> </Grid.RowDefinitions> <Grid Grid.Row="1" Margin="3"> <ContentPresenter Grid.Row="1" HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" VerticalAlignment="{TemplateBinding VerticalContentAlignment}" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/> </Grid> </Grid> <Grid.BitmapEffect> <DropShadowBitmapEffect /> </Grid.BitmapEffect> </Grid> </ControlTemplate> </UserControl.Resources> <ContentControl x:Name="ContentControl" >  <ContentControl.Style> <Style TargetType="{x:Type ContentControl}"> <Style.Triggers> <DataTrigger Value="False" Binding="{Binding ElementName=uc, Path=Flipped}"> <Setter Property="ContentControl.Template" Value="{StaticResource Up}" /> </DataTrigger> <DataTrigger Value="True" Binding="{Binding ElementName=uc, Path=Flipped}"> <Setter Property="ContentControl.Template" Value="{StaticResource Down}" /> </DataTrigger> </Style.Triggers> </Style> </ContentControl.Style> </ContentControl> </UserControl> </code></pre> <p>If I apply the style by hand like this : </p> <pre><code> <ContentControl x:Name="ContentControl" Template="{StaticResource Up}"> </code></pre> <p>It looks good! It's just that my datatriggers are not firing on the value of "Flipped"</p>
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1. POHow do I apply a style resource to a usercontrol where that style uses triggers to apply templates?
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1. COEdited your comment to show a non-working implementation of your idea.
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2. COThe style would need to go into the UserControl's Style, still. You'd use a normal Trigger, not a DataTrigger, since the Flipped property is defined on your UserControl, and a setter with TargetName="ContentControl", so it works on the control named "ContentControl" inside the UserControl.
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