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Creating a Windows Vista Themed Silverlight Tree

On this page we have customized the default styles of the Liquid TreeView control to give it a Windows Vista look.  The example demonstrates customizing the Node and Expand Control, the expand animation is also changed to a more basic fade-in.

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Customizing the Default Styles

The basic code for node population remains the same, however the XAML is quite different:

<UserControl x:Class="VistaTreeView.Page"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:liquidTreeView="clr-namespace:Liquid;assembly=Liquid.TreeView"
    Width="400" Height="400">
    <Grid x:Name="LayoutRoot" Background="White" VerticalAlignment="Top" HorizontalAlignment="Left">
        <Grid.Resources>
            <Style x:Name="VistaLiquidExpand" TargetType="liquidTreeView:Expand">
                <Setter Property="Template">
                    <Setter.Value>
                        <ControlTemplate TargetType="liquidTreeView:Expand">
                            <Grid x:Name="RootElement" Background="#00ffffff" RenderTransformOrigin="0.5,0.5">
                                <Grid.Resources>
                                    <Storyboard x:Name="ElementRotate" BeginTime="0">
                                        <DoubleAnimation Storyboard.TargetName="ElementChildrenRotate" Storyboard.TargetProperty="Angle" From="0.0" To="359.0" Duration="0:0:0.5" RepeatBehavior="Forever"/>
                                        <DoubleAnimation Storyboard.TargetName="ElementBackground" Storyboard.TargetProperty="StrokeThickness" From="1.0" To="2.5" Duration="0:0:0.4" RepeatBehavior="Forever" AutoReverse="True"/>
                                    </Storyboard>
                                    <Storyboard x:Name="ElementMouseHover" BeginTime="0">
                                        <DoubleAnimation Storyboard.TargetName="ElementChildrenScale" Storyboard.TargetProperty="ScaleX" From="1.0" To="1.2" Duration="0:0:0.1" />
                                        <DoubleAnimation Storyboard.TargetName="ElementChildrenScale" Storyboard.TargetProperty="ScaleY" From="1.0" To="1.2" Duration="0:0:0.1" />
                                    </Storyboard>
                                    <Storyboard x:Name="ElementMouseLeave" BeginTime="0">
                                        <DoubleAnimation Storyboard.TargetName="ElementChildrenScale" Storyboard.TargetProperty="ScaleX" From="1.2" To="1.0" Duration="0:0:0.1" />
                                        <DoubleAnimation Storyboard.TargetName="ElementChildrenScale" Storyboard.TargetProperty="ScaleY" From="1.2" To="1.0" Duration="0:0:0.1" />
                                    </Storyboard>
                                </Grid.Resources>
                                <Grid.RenderTransform>
                                    <TransformGroup>
                                        <RotateTransform x:Name="ElementChildrenRotate" Angle="0" />
                                        <ScaleTransform x:Name="ElementChildrenScale" ScaleX="1" ScaleY="1" />
                                    </TransformGroup>
                                </Grid.RenderTransform>
                                <Rectangle x:Name="ElementBackground" Visibility="Collapsed" />
                                <Polygon x:Name="ElementMinus" Points="8,3 8,8 3,8 8,3" Fill="#ff595959" Stroke="#ff262626" StrokeThickness="1" />
                                <Polygon x:Name="ElementPlus" Points="3,3 7,7 3,11 3,3" Fill="#ffffffff" Stroke="#ffa5a5a5" StrokeThickness="1" />
                            </Grid>
                        </ControlTemplate>
                    </Setter.Value>
                </Setter>
            </Style>
            
            <Style x:Name="VistaLiquidNode" TargetType="liquidTreeView:Node">
                <Setter Property="Template">
                    <Setter.Value>
                        <ControlTemplate TargetType="liquidTreeView:Node">
                            <StackPanel x:Name="RootElement" Orientation="Vertical" Background="{TemplateBinding Background}">
                                <StackPanel.Resources>
                                    <Storyboard x:Name="ElementFadeIn" BeginTime="0">
                                        <DoubleAnimation Storyboard.TargetName="ElementChildren" Storyboard.TargetProperty="Opacity" From="0.0" To="1.0" Duration="0:0:0.2"/>
                                        <DoubleAnimation Storyboard.TargetName="ElementChildrenScale" Storyboard.TargetProperty="ScaleX" From="0.0" To="1.0" Duration="0:0:0.2"/>
                                        <DoubleAnimation Storyboard.TargetName="ElementChildrenScale" Storyboard.TargetProperty="ScaleY" From="0.0" To="1.0" Duration="0:0:0.2"/>
                                    </Storyboard>
                                </StackPanel.Resources>
                                <Grid x:Name="ElementGrid">
                                    <Grid.ColumnDefinitions>
                                        <ColumnDefinition Width="16" MaxWidth="16" />
                                        <ColumnDefinition Width="0" />
                                        <ColumnDefinition Width="18" MaxWidth="18" />
                                        <ColumnDefinition />
                                    </Grid.ColumnDefinitions>
                                    <Rectangle x:Name="ElementBackgroundHover" Grid.Row="0" Grid.Column="3" Margin="0 0 0 1" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" StrokeThickness="1" Stroke="#d8f0fa" RadiusX="2" RadiusY="2" Visibility="Collapsed">
                                        <Rectangle.Fill>
                                            <LinearGradientBrush StartPoint="0.5,0" EndPoint="0.5,1">
                                                <GradientStop Color="#f8fcfe" Offset="0.0" />
                                                <GradientStop Color="#e8f5fd" Offset="1.0" />
                                            </LinearGradientBrush>
                                        </Rectangle.Fill>
                                    </Rectangle>
                                    <Rectangle x:Name="ElementBackground" Grid.Column="3" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" Margin="0 0 0 1" StrokeThickness="1" Stroke="#99defd" RadiusX="2" RadiusY="2" Visibility="Collapsed">
                                        <Rectangle.Fill>
                                            <LinearGradientBrush StartPoint="0.5,0" EndPoint="0.5,1">
                                                <GradientStop Color="#f6fbfd" Offset="0.0" />
                                                <GradientStop Color="#d5effc" Offset="0.9" />
                                                <GradientStop Color="#e7f5fd" Offset="0.9" />
                                                <GradientStop Color="#e7f5fd" Offset="1.0" />
                                            </LinearGradientBrush>
                                        </Rectangle.Fill>
                                    </Rectangle>
                                    <Canvas Grid.Column="0" Grid.RowSpan="2" HorizontalAlignment="Left" VerticalAlignment="Top">
                                        <Line x:Name="ElementVerticalLine" Stroke="Black" StrokeThickness="0.5" StrokeDashArray="0,1,2,3" StrokeDashOffset="5" StrokeDashCap="Square" />
                                    </Canvas>
                                    <Line x:Name="ElementHorizontalLine" Grid.Column="0" HorizontalAlignment="Left" VerticalAlignment="Top" Stroke="Black" StrokeThickness="0.5" StrokeDashArray="0,1,2,3" StrokeDashOffset="5" StrokeDashCap="Square" />
                                    <liquidTreeView:Expand x:Name="ElementExpand" Grid.Column="0" HorizontalAlignment="Left" Style="{StaticResource VistaLiquidExpand}" />
                                    <CheckBox x:Name="ElementCheckbox" Grid.Column="1" HorizontalAlignment="Left" VerticalAlignment="Center" />
                                    <ContentControl x:Name="ElementIcon" Grid.Column="2" HorizontalAlignment="Left" VerticalAlignment="Center" />
                                    <TextBox x:Name="ElementInput" Grid.Column="3" HorizontalAlignment="Left" FontFamily="{TemplateBinding FontFamily}" FontSize="{TemplateBinding FontSize}" Padding="1" Visibility="Collapsed" BorderThickness="0.5" />
                                    <TextBlock x:Name="ElementText" Grid.Column="3" Margin="3 1 4 2" HorizontalAlignment="Left" VerticalAlignment="Center" Text="" FontFamily="{TemplateBinding FontFamily}"
                                   FontSize="{TemplateBinding FontSize}" FontWeight="{TemplateBinding FontWeight}"
                                   FontStyle="{TemplateBinding FontStyle}" Foreground="{TemplateBinding Foreground}"/>
                                    <TextBlock x:Name="ElementSelectedText" Grid.Column="3" Margin="3 1 4 2" HorizontalAlignment="Left" VerticalAlignment="Center" Text="" FontFamily="{TemplateBinding FontFamily}"
                                   FontSize="{TemplateBinding FontSize}" FontWeight="{TemplateBinding FontWeight}"
                                   FontStyle="{TemplateBinding FontStyle}" Foreground="#000000" Visibility="Collapsed" />
                                </Grid>
                                <StackPanel x:Name="ElementChildren" Orientation="Vertical" HorizontalAlignment="Left" Margin="16 0 0 0" Background="#00ffffff" Opacity="0" Visibility="Collapsed">
                                    <StackPanel.RenderTransform>
                                        <ScaleTransform x:Name="ElementChildrenScale" />
                                    </StackPanel.RenderTransform>
                                </StackPanel>
                            </StackPanel>
                        </ControlTemplate>
                    </Setter.Value>
                </Setter>
            </Style>
        </Grid.Resources>
        <liquidTreeView:Tree x:Name="testTree" Canvas.Top="295" Canvas.Left="200" Width="300" Height="300" Margin="4" Populate="Tree_Populate" NodeClick="Tree_NodeClick" />
    </Grid>
</UserControl>


As you can see from the above XAML we create 2 custom styles (VistaLiquidExpand and VistaLiquidNode) that override the default provided styles.  In the Node style we have an instance of the Expand control (liquid:Expand), this contains a style property (Style="{StaticResource VistaLiquidExpand}") that refers to the custom Expand style.

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