PDFOffice_Windows_exe/PDF Office/Styles/ExpanderStyle.xaml

<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">

    <Style x:Key="ExpanderDownHeaderStyle" TargetType="{x:Type ToggleButton}">
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="{x:Type ToggleButton}">
                    <Border Padding="{TemplateBinding Padding}">
                        <Grid Background="Transparent" SnapsToDevicePixels="False">
                            <Grid.ColumnDefinitions>
                                <ColumnDefinition Width="auto" />
                                <ColumnDefinition Width="19" />
                            </Grid.ColumnDefinitions>
                            <Path
                                x:Name="arrow"
                                Grid.Column="1"
                                HorizontalAlignment="Center"
                                VerticalAlignment="Center"
                                Data="M4 5.00023L8.00012 0.000115851H-0.000115851L4 5.00023Z"
                                Fill="#8F96A7"
                                SnapsToDevicePixels="false"
                                Visibility="Collapsed" />
                            <Path
                                x:Name="arrow2"
                                Grid.Column="1"
                                HorizontalAlignment="Center"
                                VerticalAlignment="Center"
                                Data="M5.00023 4L0.000115514 -0.000116188L0.000116188 8.00012L5.00023 4Z"
                                Fill="#8F96A7"
                                SnapsToDevicePixels="false" />
                            <ContentPresenter
                                Margin="4,0,0,0"
                                HorizontalAlignment="Left"
                                VerticalAlignment="Center"
                                RecognizesAccessKey="True"
                                SnapsToDevicePixels="True" />
                        </Grid>
                    </Border>
                    <ControlTemplate.Triggers>
                        <Trigger Property="IsChecked" Value="true">
                            <Setter TargetName="arrow" Property="Visibility" Value="Visible" />
                            <Setter TargetName="arrow2" Property="Visibility" Value="Collapsed" />
                        </Trigger>

                        <Trigger Property="IsMouseOver" Value="true" />
                        <Trigger Property="IsPressed" Value="true" />
                        <Trigger Property="IsEnabled" Value="false" />
                    </ControlTemplate.Triggers>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>

    <Style x:Key="PromotionExpanderStyle" TargetType="{x:Type Expander}">
        <Setter Property="Background" Value="Transparent" />
        <Setter Property="HorizontalContentAlignment" Value="Stretch" />
        <Setter Property="VerticalContentAlignment" Value="Stretch" />
        <Setter Property="BorderBrush" Value="Transparent" />
        <Setter Property="BorderThickness" Value="1" />
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="{x:Type Expander}">
                    <Border
                        Background="{TemplateBinding Background}"
                        BorderBrush="{TemplateBinding BorderBrush}"
                        BorderThickness="{TemplateBinding BorderThickness}"
                        CornerRadius="3"
                        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"
                                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 ExpanderDownHeaderStyle}" />

                            <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" />
                        </Trigger>
                        <Trigger Property="ExpandDirection" Value="Up">
                            <Setter TargetName="ExpandSite" Property="DockPanel.Dock" Value="Top" />
                            <Setter TargetName="HeaderSite" Property="DockPanel.Dock" Value="Bottom" />
                        </Trigger>
                        <Trigger Property="ExpandDirection" Value="Left">
                            <Setter TargetName="ExpandSite" Property="DockPanel.Dock" Value="Left" />
                            <Setter TargetName="HeaderSite" Property="DockPanel.Dock" Value="Right" />
                        </Trigger>
                        <Trigger Property="IsEnabled" Value="false" />
                    </ControlTemplate.Triggers>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>
    <Style x:Key="ExpanderHeaderFocusVisual">
        <Setter Property="Control.Template">
            <Setter.Value>
                <ControlTemplate>
                    <Border>
                        <Rectangle
                            Margin="0"
                            SnapsToDevicePixels="true"
                            Stroke="Black"
                            StrokeDashArray="1 2"
                            StrokeThickness="1" />
                    </Border>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>
    <Style x:Key="GropExpanderHeader" TargetType="{x:Type Expander}">
        <Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.ControlTextBrushKey}}" />
        <Setter Property="Background" Value="Transparent" />
        <Setter Property="HorizontalContentAlignment" Value="Stretch" />
        <Setter Property="VerticalContentAlignment" Value="Stretch" />
        <Setter Property="BorderBrush" Value="Transparent" />
        <Setter Property="BorderThickness" Value="1" />
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="{x:Type Expander}">
                    <Border
                        Background="{TemplateBinding Background}"
                        BorderBrush="{TemplateBinding BorderBrush}"
                        BorderThickness="{TemplateBinding BorderThickness}"
                        CornerRadius="3"
                        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="{StaticResource ExpanderHeaderFocusVisual}"
                                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 ExpanderDownHeaderStyle}" />
                            <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="IsEnabled" Value="false">
                            <Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.GrayTextBrushKey}}" />
                        </Trigger>
                    </ControlTemplate.Triggers>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>
</ResourceDictionary>