Files
ShrlAlgoToolkit/WPFluent/Controls/Expander/Expander.xaml
2025-04-24 20:56:44 +08:00

535 lines
33 KiB
XML

<!--
This Source Code Form is subject to the terms of the MIT License.
If a copy of the MIT was not distributed with this file, You can obtain one at https://opensource.org/licenses/MIT.
Copyright (C) Leszek Pomianowski and WPF UI Contributors.
All Rights Reserved.
Based on Microsoft XAML for Win UI
Copyright (c) Microsoft Corporation. All Rights Reserved.
-->
<ResourceDictionary
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:controls="clr-namespace:WPFluent.Controls"
xmlns:converters="clr-namespace:WPFluent.Converters"
xmlns:system="clr-namespace:System;assembly=mscorlib">
<Thickness x:Key="ExpanderPadding">11,11,11,11</Thickness>
<Thickness x:Key="ExpanderBorderThemeThickness">1</Thickness>
<system:Double x:Key="ExpanderChevronSize">16.0</system:Double>
<ControlTemplate x:Key="DefaultExpanderToggleButtonStyle" TargetType="{x:Type ToggleButton}">
<Grid Margin="{TemplateBinding Padding}" Background="Transparent">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*" />
<ColumnDefinition Width="Auto" />
</Grid.ColumnDefinitions>
<ContentPresenter
x:Name="ContentPresenter"
Grid.Column="0"
HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"
VerticalAlignment="{TemplateBinding VerticalContentAlignment}"
Content="{TemplateBinding Content}"
TextElement.FontSize="{TemplateBinding FontSize}" />
<Grid
x:Name="ChevronGrid"
Grid.Column="1"
Margin="0"
VerticalAlignment="Center"
Background="Transparent"
RenderTransformOrigin="0.5, 0.5">
<Grid.RenderTransform>
<RotateTransform Angle="0" />
</Grid.RenderTransform>
<controls:SymbolIcon
x:Name="ControlChevronIcon"
FontSize="{StaticResource ExpanderChevronSize}"
Foreground="{TemplateBinding Foreground}"
Symbol="ChevronDown24" />
</Grid>
</Grid>
<ControlTemplate.Triggers>
<Trigger Property="IsChecked" Value="True">
<Trigger.EnterActions>
<BeginStoryboard>
<Storyboard>
<DoubleAnimation
Storyboard.TargetName="ChevronGrid"
Storyboard.TargetProperty="(Grid.RenderTransform).(RotateTransform.Angle)"
To="180"
Duration="00:00:00.167" />
</Storyboard>
</BeginStoryboard>
</Trigger.EnterActions>
<Trigger.ExitActions>
<BeginStoryboard>
<Storyboard>
<DoubleAnimation
Storyboard.TargetName="ChevronGrid"
Storyboard.TargetProperty="(Grid.RenderTransform).(RotateTransform.Angle)"
To="0"
Duration="00:00:00.167" />
</Storyboard>
</BeginStoryboard>
</Trigger.ExitActions>
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
<Style x:Key="DefaultExpanderStyle" TargetType="{x:Type Expander}">
<!-- Universal WPF UI focus -->
<Setter Property="FocusVisualStyle" Value="{DynamicResource DefaultControlFocusVisualStyle}" />
<!-- Universal WPF UI focus -->
<Setter Property="Background" Value="{DynamicResource ExpanderHeaderBackground}" />
<Setter Property="Foreground" Value="{DynamicResource ExpanderHeaderForeground}" />
<Setter Property="BorderBrush" Value="{DynamicResource ExpanderHeaderBorderBrush}" />
<Setter Property="BorderThickness" Value="{StaticResource ExpanderBorderThemeThickness}" />
<Setter Property="Padding" Value="{StaticResource ExpanderPadding}" />
<Setter Property="HorizontalAlignment" Value="Stretch" />
<Setter Property="VerticalAlignment" Value="Center" />
<Setter Property="HorizontalContentAlignment" Value="Stretch" />
<Setter Property="VerticalContentAlignment" Value="Center" />
<Setter Property="FontSize" Value="{DynamicResource ControlContentThemeFontSize}" />
<Setter Property="FontWeight" Value="Normal" />
<Setter Property="Border.CornerRadius" Value="{DynamicResource ControlCornerRadius}" />
<Setter Property="IsExpanded" Value="False" />
<Setter Property="SnapsToDevicePixels" Value="True" />
<Setter Property="OverridesDefaultStyle" Value="True" />
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type Expander}">
<ControlTemplate.Resources>
<converters:AnimationFactorToValueConverter x:Key="AnimationFactorToValueConverter" />
</ControlTemplate.Resources>
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="Auto" />
<RowDefinition Height="*" />
</Grid.RowDefinitions>
<!-- Top level controls always visible -->
<Border
x:Name="ToggleButtonBorder"
Grid.Row="0"
Background="{TemplateBinding Background}"
BorderBrush="{TemplateBinding BorderBrush}"
BorderThickness="1"
CornerRadius="{TemplateBinding Border.CornerRadius}">
<ToggleButton
x:Name="ExpanderToggleButton"
Margin="0"
Padding="{TemplateBinding Padding}"
HorizontalAlignment="Stretch"
VerticalAlignment="{TemplateBinding VerticalContentAlignment}"
HorizontalContentAlignment="Stretch"
VerticalContentAlignment="Center"
Content="{TemplateBinding Header}"
FontSize="{TemplateBinding FontSize}"
Foreground="{TemplateBinding Foreground}"
IsChecked="{Binding IsExpanded, Mode=TwoWay, RelativeSource={RelativeSource TemplatedParent}}"
IsEnabled="{TemplateBinding IsEnabled}"
OverridesDefaultStyle="True"
Template="{StaticResource DefaultExpanderToggleButtonStyle}" />
</Border>
<!-- Collapsed content to expand -->
<Grid Grid.Row="1" ClipToBounds="True">
<Border
x:Name="ContentPresenterBorder"
Background="{DynamicResource ExpanderContentBackground}"
BorderBrush="{TemplateBinding BorderBrush}"
BorderThickness="1,0,1,1"
CornerRadius="0,0,4,4"
Visibility="Collapsed">
<ContentPresenter
x:Name="ContentPresenter"
Margin="{TemplateBinding Padding}"
HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"
VerticalAlignment="{TemplateBinding VerticalContentAlignment}"
Content="{TemplateBinding Content}" />
<Border.Tag>
<system:Double>0.0</system:Double>
</Border.Tag>
<Border.RenderTransform>
<TranslateTransform>
<TranslateTransform.Y>
<MultiBinding Converter="{StaticResource AnimationFactorToValueConverter}" ConverterParameter="negative">
<Binding ElementName="ContentPresenterBorder" Path="ActualHeight" />
<Binding ElementName="ContentPresenterBorder" Path="Tag" />
</MultiBinding>
</TranslateTransform.Y>
</TranslateTransform>
</Border.RenderTransform>
</Border>
</Grid>
</Grid>
<ControlTemplate.Triggers>
<Trigger Property="IsExpanded" Value="True">
<Setter TargetName="ToggleButtonBorder" Property="CornerRadius" Value="4,4,0,0" />
<Trigger.EnterActions>
<BeginStoryboard>
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentPresenterBorder" Storyboard.TargetProperty="(Border.Visibility)">
<DiscreteObjectKeyFrame KeyTime="0" Value="{x:Static Visibility.Visible}" />
</ObjectAnimationUsingKeyFrames>
<DoubleAnimationUsingKeyFrames Storyboard.TargetName="ContentPresenterBorder" Storyboard.TargetProperty="Tag">
<DiscreteDoubleKeyFrame KeyTime="0" Value="1.0" />
<SplineDoubleKeyFrame
KeySpline="0.0, 0.0, 0.0, 1.0"
KeyTime="0:0:0.333"
Value="0.0" />
</DoubleAnimationUsingKeyFrames>
</Storyboard>
</BeginStoryboard>
</Trigger.EnterActions>
<Trigger.ExitActions>
<BeginStoryboard>
<Storyboard>
<ObjectAnimationUsingKeyFrames Storyboard.TargetName="ContentPresenterBorder" Storyboard.TargetProperty="(Border.Visibility)">
<DiscreteObjectKeyFrame KeyTime="0" Value="{x:Static Visibility.Visible}" />
<DiscreteObjectKeyFrame KeyTime="0:0:0.2" Value="{x:Static Visibility.Collapsed}" />
</ObjectAnimationUsingKeyFrames>
<DoubleAnimationUsingKeyFrames Storyboard.TargetName="ContentPresenterBorder" Storyboard.TargetProperty="Tag">
<DiscreteDoubleKeyFrame KeyTime="0" Value="0.0" />
<SplineDoubleKeyFrame
KeySpline="1.0, 1.0, 0.0, 1.0"
KeyTime="0:0:0.167"
Value="1.0" />
</DoubleAnimationUsingKeyFrames>
</Storyboard>
</BeginStoryboard>
</Trigger.ExitActions>
</Trigger>
<Trigger Property="IsEnabled" Value="False">
<Setter TargetName="ContentPresenter" Property="TextElement.Foreground" Value="{DynamicResource ExpanderHeaderDisabledForeground}" />
<Setter TargetName="ExpanderToggleButton" Property="Foreground" Value="{DynamicResource ExpanderHeaderDisabledForeground}" />
<Setter TargetName="ExpanderToggleButton" Property="BorderBrush" Value="{DynamicResource ExpanderHeaderDisabledBorderBrush}" />
</Trigger>
<Trigger SourceName="ExpanderToggleButton" Property="IsMouseOver" Value="True">
<Setter TargetName="ExpanderToggleButton" Property="BorderBrush" Value="{DynamicResource ExpanderHeaderBorderPointerOverBrush}" />
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
<Style x:Key="SimpleExpanderDownHeaderStyle" TargetType="{x:Type ToggleButton}">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type ToggleButton}">
<ControlTemplate.Resources>
<StreamGeometry x:Key="ChevronDown">M 18.935547 4.560547 L 19.814453 5.439453 L 10 15.253906 L 0.185547 5.439453 L 1.064453 4.560547 L 10 13.496094 Z</StreamGeometry>
<StreamGeometry x:Key="ChevronUp">M 19.091797 14.970703 L 10 5.888672 L 0.908203 14.970703 L 0.029297 14.091797 L 10 4.111328 L 19.970703 14.091797 Z</StreamGeometry>
</ControlTemplate.Resources>
<Border Padding="{TemplateBinding Padding}">
<Grid Background="Transparent" SnapsToDevicePixels="False">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="Auto" />
<ColumnDefinition Width="*" />
</Grid.ColumnDefinitions>
<controls:FontIconFallback
x:Name="arrow"
HorizontalAlignment="Center"
VerticalAlignment="Center"
Data="{StaticResource ChevronDown}"
FontFamily="{DynamicResource SymbolThemeFontFamily}"
FontSize="12"
Foreground="{DynamicResource SystemControlForegroundBaseHighBrush}"
SnapsToDevicePixels="false" />
<ContentPresenter
Grid.Column="1"
Margin="8,0,0,0"
HorizontalAlignment="Left"
VerticalAlignment="Center"
RecognizesAccessKey="True"
SnapsToDevicePixels="True" />
</Grid>
</Border>
<ControlTemplate.Triggers>
<Trigger Property="IsChecked" Value="true">
<Setter TargetName="arrow" Property="Data" Value="{StaticResource ChevronUp}" />
</Trigger>
<Trigger Property="IsMouseOver" Value="true">
<Setter TargetName="arrow" Property="Foreground" Value="{DynamicResource SystemControlPageTextBaseMediumBrush}" />
</Trigger>
<Trigger Property="IsPressed" Value="true">
<Setter TargetName="arrow" Property="Foreground" Value="{DynamicResource SystemControlHighlightBaseMediumLowBrush}" />
</Trigger>
<Trigger Property="IsEnabled" Value="false">
<Setter TargetName="arrow" Property="Foreground" Value="{DynamicResource SystemControlDisabledBaseMediumLowBrush}" />
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
<Style x:Key="SimpleExpanderUpHeaderStyle" TargetType="{x:Type ToggleButton}">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type ToggleButton}">
<ControlTemplate.Resources>
<StreamGeometry x:Key="ChevronDown">M 18.935547 4.560547 L 19.814453 5.439453 L 10 15.253906 L 0.185547 5.439453 L 1.064453 4.560547 L 10 13.496094 Z</StreamGeometry>
<StreamGeometry x:Key="ChevronUp">M 19.091797 14.970703 L 10 5.888672 L 0.908203 14.970703 L 0.029297 14.091797 L 10 4.111328 L 19.970703 14.091797 Z</StreamGeometry>
</ControlTemplate.Resources>
<Border Padding="{TemplateBinding Padding}">
<Grid Background="Transparent" SnapsToDevicePixels="False">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="Auto" />
<ColumnDefinition Width="*" />
</Grid.ColumnDefinitions>
<Grid>
<Grid.LayoutTransform>
<TransformGroup>
<TransformGroup.Children>
<TransformCollection>
<RotateTransform Angle="180" />
</TransformCollection>
</TransformGroup.Children>
</TransformGroup>
</Grid.LayoutTransform>
<controls:FontIconFallback
x:Name="arrow"
HorizontalAlignment="Center"
VerticalAlignment="Center"
Data="{StaticResource ChevronDown}"
FontFamily="{DynamicResource SymbolThemeFontFamily}"
FontSize="12"
Foreground="{DynamicResource SystemControlForegroundBaseHighBrush}"
SnapsToDevicePixels="false" />
</Grid>
<ContentPresenter
Grid.Column="1"
Margin="8,0,0,0"
HorizontalAlignment="Left"
VerticalAlignment="Center"
RecognizesAccessKey="True"
SnapsToDevicePixels="True" />
</Grid>
</Border>
<ControlTemplate.Triggers>
<Trigger Property="IsChecked" Value="true">
<Setter TargetName="arrow" Property="Data" Value="{StaticResource ChevronUp}" />
</Trigger>
<Trigger Property="IsMouseOver" Value="true">
<Setter TargetName="arrow" Property="Foreground" Value="{DynamicResource SystemControlPageTextBaseMediumBrush}" />
</Trigger>
<Trigger Property="IsPressed" Value="true">
<Setter TargetName="arrow" Property="Foreground" Value="{DynamicResource SystemControlHighlightBaseMediumLowBrush}" />
</Trigger>
<Trigger Property="IsEnabled" Value="false">
<Setter TargetName="arrow" Property="Foreground" Value="{DynamicResource SystemControlDisabledBaseMediumLowBrush}" />
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
<Style x:Key="SimpleExpanderLeftHeaderStyle" TargetType="{x:Type ToggleButton}">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type ToggleButton}">
<ControlTemplate.Resources>
<StreamGeometry x:Key="ChevronDown">M 18.935547 4.560547 L 19.814453 5.439453 L 10 15.253906 L 0.185547 5.439453 L 1.064453 4.560547 L 10 13.496094 Z</StreamGeometry>
<StreamGeometry x:Key="ChevronUp">M 19.091797 14.970703 L 10 5.888672 L 0.908203 14.970703 L 0.029297 14.091797 L 10 4.111328 L 19.970703 14.091797 Z</StreamGeometry>
</ControlTemplate.Resources>
<Border Padding="{TemplateBinding Padding}">
<Grid Background="Transparent" SnapsToDevicePixels="False">
<Grid.RowDefinitions>
<RowDefinition Height="Auto" />
<RowDefinition Height="*" />
</Grid.RowDefinitions>
<Grid>
<Grid.LayoutTransform>
<TransformGroup>
<TransformGroup.Children>
<TransformCollection>
<RotateTransform Angle="90" />
</TransformCollection>
</TransformGroup.Children>
</TransformGroup>
</Grid.LayoutTransform>
<controls:FontIconFallback
x:Name="arrow"
HorizontalAlignment="Center"
VerticalAlignment="Center"
Data="{StaticResource ChevronDown}"
FontFamily="{DynamicResource SymbolThemeFontFamily}"
FontSize="12"
Foreground="{DynamicResource SystemControlForegroundBaseHighBrush}"
SnapsToDevicePixels="false" />
</Grid>
<ContentPresenter
Grid.Row="1"
Margin="0,4,0,0"
HorizontalAlignment="Center"
VerticalAlignment="Top"
RecognizesAccessKey="True"
SnapsToDevicePixels="True" />
</Grid>
</Border>
<ControlTemplate.Triggers>
<Trigger Property="IsChecked" Value="true">
<Setter TargetName="arrow" Property="Data" Value="{StaticResource ChevronUp}" />
</Trigger>
<Trigger Property="IsMouseOver" Value="true">
<Setter TargetName="arrow" Property="Foreground" Value="{DynamicResource SystemControlPageTextBaseMediumBrush}" />
</Trigger>
<Trigger Property="IsPressed" Value="true">
<Setter TargetName="arrow" Property="Foreground" Value="{DynamicResource SystemControlHighlightBaseMediumLowBrush}" />
</Trigger>
<Trigger Property="IsEnabled" Value="false">
<Setter TargetName="arrow" Property="Foreground" Value="{DynamicResource SystemControlDisabledBaseMediumLowBrush}" />
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
<Style x:Key="SimpleExpanderRightHeaderStyle" TargetType="{x:Type ToggleButton}">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type ToggleButton}">
<ControlTemplate.Resources>
<StreamGeometry x:Key="ChevronDown">M 18.935547 4.560547 L 19.814453 5.439453 L 10 15.253906 L 0.185547 5.439453 L 1.064453 4.560547 L 10 13.496094 Z</StreamGeometry>
<StreamGeometry x:Key="ChevronUp">M 19.091797 14.970703 L 10 5.888672 L 0.908203 14.970703 L 0.029297 14.091797 L 10 4.111328 L 19.970703 14.091797 Z</StreamGeometry>
</ControlTemplate.Resources>
<Border Padding="{TemplateBinding Padding}">
<Grid Background="Transparent" SnapsToDevicePixels="False">
<Grid.RowDefinitions>
<RowDefinition Height="Auto" />
<RowDefinition Height="*" />
</Grid.RowDefinitions>
<Grid>
<Grid.LayoutTransform>
<TransformGroup>
<TransformGroup.Children>
<TransformCollection>
<RotateTransform Angle="-90" />
</TransformCollection>
</TransformGroup.Children>
</TransformGroup>
</Grid.LayoutTransform>
<controls:FontIconFallback
x:Name="arrow"
HorizontalAlignment="Center"
VerticalAlignment="Center"
Data="{StaticResource ChevronDown}"
FontFamily="{DynamicResource SymbolThemeFontFamily}"
FontSize="12"
Foreground="{DynamicResource SystemControlForegroundBaseHighBrush}"
SnapsToDevicePixels="false" />
</Grid>
<ContentPresenter
Grid.Row="1"
Margin="0,4,0,0"
HorizontalAlignment="Center"
VerticalAlignment="Top"
RecognizesAccessKey="True"
SnapsToDevicePixels="True" />
</Grid>
</Border>
<ControlTemplate.Triggers>
<Trigger Property="IsChecked" Value="true">
<Setter TargetName="arrow" Property="Data" Value="{StaticResource ChevronUp}" />
</Trigger>
<Trigger Property="IsMouseOver" Value="true">
<Setter TargetName="arrow" Property="Foreground" Value="{DynamicResource SystemControlPageTextBaseMediumBrush}" />
</Trigger>
<Trigger Property="IsPressed" Value="true">
<Setter TargetName="arrow" Property="Foreground" Value="{DynamicResource SystemControlHighlightBaseMediumLowBrush}" />
</Trigger>
<Trigger Property="IsEnabled" Value="false">
<Setter TargetName="arrow" Property="Foreground" Value="{DynamicResource SystemControlDisabledBaseMediumLowBrush}" />
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
<Style x:Key="SimpleExpanderStyle" TargetType="{x:Type Expander}">
<Setter Property="OverridesDefaultStyle" Value="True" />
<Setter Property="Foreground" Value="{DynamicResource SystemControlForegroundBaseHighBrush}" />
<Setter Property="Background" Value="Transparent" />
<Setter Property="HorizontalContentAlignment" Value="Stretch" />
<Setter Property="VerticalContentAlignment" Value="Stretch" />
<Setter Property="FontSize" Value="{DynamicResource ControlContentThemeFontSize}" />
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type Expander}">
<Border
Background="{TemplateBinding Background}"
BorderBrush="{TemplateBinding BorderBrush}"
BorderThickness="{TemplateBinding BorderThickness}"
CornerRadius="{DynamicResource ControlCornerRadius}"
SnapsToDevicePixels="true">
<DockPanel>
<ToggleButton
x:Name="HeaderSite"
MinWidth="0"
MinHeight="0"
Margin="1"
Padding="{TemplateBinding Padding}"
HorizontalContentAlignment="{TemplateBinding HorizontalContentAlignment}"
VerticalContentAlignment="{TemplateBinding VerticalContentAlignment}"
Content="{TemplateBinding Header}"
ContentTemplate="{TemplateBinding HeaderTemplate}"
ContentTemplateSelector="{TemplateBinding HeaderTemplateSelector}"
DockPanel.Dock="Top"
FocusVisualStyle="{DynamicResource {x:Static SystemParameters.FocusVisualStyleKey}}"
FontFamily="{TemplateBinding FontFamily}"
FontSize="{TemplateBinding FontSize}"
FontStretch="{TemplateBinding FontStretch}"
FontStyle="{TemplateBinding FontStyle}"
FontWeight="{TemplateBinding FontWeight}"
Foreground="{TemplateBinding Foreground}"
IsChecked="{Binding IsExpanded, Mode=TwoWay, RelativeSource={RelativeSource TemplatedParent}}"
Style="{StaticResource SimpleExpanderDownHeaderStyle}" />
<ContentPresenter
x:Name="ExpandSite"
Margin="{TemplateBinding Padding}"
HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"
VerticalAlignment="{TemplateBinding VerticalContentAlignment}"
DockPanel.Dock="Bottom"
Focusable="false"
Visibility="Collapsed" />
</DockPanel>
</Border>
<ControlTemplate.Triggers>
<Trigger Property="IsExpanded" Value="true">
<Setter TargetName="ExpandSite" Property="Visibility" Value="Visible" />
</Trigger>
<Trigger Property="ExpandDirection" Value="Right">
<Setter TargetName="ExpandSite" Property="DockPanel.Dock" Value="Right" />
<Setter TargetName="HeaderSite" Property="DockPanel.Dock" Value="Left" />
<Setter TargetName="HeaderSite" Property="Style" Value="{StaticResource SimpleExpanderRightHeaderStyle}" />
</Trigger>
<Trigger Property="ExpandDirection" Value="Up">
<Setter TargetName="ExpandSite" Property="DockPanel.Dock" Value="Top" />
<Setter TargetName="HeaderSite" Property="DockPanel.Dock" Value="Bottom" />
<Setter TargetName="HeaderSite" Property="Style" Value="{StaticResource SimpleExpanderUpHeaderStyle}" />
</Trigger>
<Trigger Property="ExpandDirection" Value="Left">
<Setter TargetName="ExpandSite" Property="DockPanel.Dock" Value="Left" />
<Setter TargetName="HeaderSite" Property="DockPanel.Dock" Value="Right" />
<Setter TargetName="HeaderSite" Property="Style" Value="{StaticResource SimpleExpanderLeftHeaderStyle}" />
</Trigger>
<Trigger Property="IsEnabled" Value="false">
<Setter Property="Foreground" Value="{DynamicResource SystemControlDisabledBaseMediumLowBrush}" />
</Trigger>
</ControlTemplate.Triggers>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
<Style BasedOn="{StaticResource DefaultExpanderStyle}" TargetType="{x:Type Expander}" />
</ResourceDictionary>