PDFOffice_Windows_exe/PDF Office/Styles/OutLineItemStyle.xaml

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                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
                    xmlns:dataconvert="clr-namespace:PDF_Office.DataConvert" 
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    <dataconvert:UnVisivleConvert x:Key="UnVisivleConvert"/>
    <dataconvert:BoolToVisible x:Key="BoolToVisible"/>
    
    <Style x:Key="FocusVisualRadius0Margin0">
        <Setter Property="Control.Template">
            <Setter.Value>
                <ControlTemplate>
                    <Rectangle
                        Opacity=".6"
                        SnapsToDevicePixels="true"
                        Stroke="#757575"
                        StrokeDashArray="1 1"
                        StrokeThickness="2" />
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>

    <Style x:Key="ExpandCollapseToggleStyle" TargetType="ToggleButton">
        <Setter Property="Focusable" Value="False" />
        <Setter Property="Width" Value="16" />
        <Setter Property="Height" Value="16" />
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="ToggleButton">
                    <Border
                        Width="16"
                        Height="16"
                        Padding="4"
                        Background="Transparent">
                        <Path
                            x:Name="ExpandPath"
                            Data="{StaticResource TreeArrow}"
                            Fill="{Binding Foreground, RelativeSource={RelativeSource AncestorType=TreeViewItem}}"
                            RenderTransformOrigin="0.5,0.5"
                            Stretch="Uniform">
                            <Path.RenderTransform>
                                <RotateTransform Angle="-90" />
                            </Path.RenderTransform>
                        </Path>
                    </Border>
                    <ControlTemplate.Triggers>
                        <Trigger Property="IsChecked" Value="True">
                            <Setter TargetName="ExpandPath" Property="RenderTransform">
                                <Setter.Value>
                                    <RotateTransform Angle="0" />
                                </Setter.Value>
                            </Setter>
                        </Trigger>
                    </ControlTemplate.Triggers>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>

    <Style x:Key="OutLineItemStyle" TargetType="{x:Type TreeViewItem}">
        <Setter Property="IsExpanded" Value="{Binding IsExpanded,Mode=TwoWay}"/>
        <Setter Property="IsSelected" Value="{Binding IsSelected,Mode=TwoWay}"/>
        <Setter Property="Background" Value="Transparent" />
        <Setter Property="HorizontalContentAlignment" Value="Center" />
        <Setter Property="VerticalContentAlignment" Value="Center" />
        <Setter Property="Padding" Value="10,0" />
        <Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.ControlTextBrushKey}}" />
        <Setter Property="FocusVisualStyle" Value="{StaticResource FocusVisualRadius0Margin0}" />
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="{x:Type TreeViewItem}">
                    <Grid>
                        <Grid.ColumnDefinitions>
                            <ColumnDefinition Width="Auto" MinWidth="19" />
                            <ColumnDefinition Width="Auto" />
                            <ColumnDefinition Width="*" />
                        </Grid.ColumnDefinitions>
                        <Grid.RowDefinitions>
                            <RowDefinition MinHeight="32" />
                            <RowDefinition />
                        </Grid.RowDefinitions>
                        <Border
                            x:Name="Bd"
                            Grid.ColumnSpan="3"
                            Padding="{TemplateBinding Padding}"
                            Background="{TemplateBinding Background}"
                            BorderBrush="{TemplateBinding BorderBrush}"
                            BorderThickness="{TemplateBinding BorderThickness}"
                            SnapsToDevicePixels="True">
                            <Grid>

                                <DockPanel LastChildFill="True" x:Name="PART_DockPanel">
                                    <ToggleButton
                                    x:Name="Expander"
                                    ClickMode="Press"
                                    IsChecked="{Binding IsExpanded, RelativeSource={RelativeSource TemplatedParent}}"
                                    Style="{StaticResource ExpandCollapseToggleStyle}" />
                                    <ContentPresenter
                                    x:Name="PART_Header"
                                    ContentSource="Header"
                                    SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" />
                                </DockPanel>

                                <StackPanel Margin="0,0,0,0"  Orientation="Horizontal" Visibility="{Binding IsInsertCurrentLayer,Converter={StaticResource BoolToVisible}}">
                                    <Ellipse Width="8" Height="8" Fill="White" Stroke="#FF0078D7" StrokeThickness="1.5" HorizontalAlignment="Stretch" VerticalAlignment="Bottom"/>
                                    <Rectangle Margin="-1,0,0,2" Width="{Binding ElementName=PART_DockPanel,Path=ActualWidth}" HorizontalAlignment="Stretch" Height="1.5" StrokeDashArray="2" VerticalAlignment="Bottom" Fill="#FF0078D7"/>
                                </StackPanel>
                            </Grid>
                        </Border>
                        <ItemsPresenter
                            x:Name="ItemsHost"
                            Grid.Row="1"
                            Grid.Column="1"
                            Grid.ColumnSpan="2" />
                    </Grid>
                    <ControlTemplate.Triggers>
                        <Trigger Property="IsExpanded" Value="False">
                            <Setter TargetName="ItemsHost" Property="Visibility" Value="Collapsed" />
                        </Trigger>
                        <Trigger Property="HasItems" Value="False">
                            <Setter TargetName="Expander" Property="Visibility" Value="Hidden" />
                        </Trigger>
                        <Trigger Property="IsSelected" Value="True">
                            <Setter TargetName="Bd" Property="Background" Value="#1A477EDE" />
                            <Setter Property="Foreground" Value="Black" />
                        </Trigger>
                        <Trigger SourceName="Bd" Property="IsMouseOver" Value="True">
                            <Setter TargetName="Bd" Property="Background" Value="#1A000000" />
                            <Setter Property="Foreground" Value="Black" />
                        </Trigger>
                        <MultiTrigger>
                            <MultiTrigger.Conditions>
                                <Condition Property="IsSelected" Value="True" />
                                <Condition Property="IsSelectionActive" Value="False" />
                            </MultiTrigger.Conditions>
                            <Setter TargetName="Bd" Property="Background" Value="{DynamicResource {x:Static SystemColors.InactiveSelectionHighlightBrushKey}}" />
                            <Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.InactiveSelectionHighlightTextBrushKey}}" />
                        </MultiTrigger>
                    </ControlTemplate.Triggers>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
        <Style.Triggers>
            <Trigger Property="VirtualizingPanel.IsVirtualizing" Value="True">
                <Setter Property="ItemsPanel">
                    <Setter.Value>
                        <ItemsPanelTemplate>
                            <VirtualizingStackPanel IsItemsHost="True" />
                        </ItemsPanelTemplate>
                    </Setter.Value>
                </Setter>
            </Trigger>
        </Style.Triggers>
    </Style>
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