Expander-Stile und -Vorlagen

  • Artikel

In diesem Thema werden die Stile und Vorlagen für das Expander-Steuerelement beschrieben. Sie können die Standard-ControlTemplate ändern, um dem Steuerelement ein einzigartiges Aussehen zu verleihen. Weitere Informationen finden Sie unter Erstellen einer Vorlage für ein Steuerelement.

Expander-Teile

Das Expander-Steuerelement enthält keine benannten Teile.

Expander-Zustände

In der folgenden Tabelle sind die visuellen Zustände für das Expander-Steuerelement aufgeführt.

VisualState-Name VisualStateGroup-Name Beschreibung
Normal CommonStates Der Standardzustand
MouseOver CommonStates Der Mauszeiger ist über dem Steuerelement positioniert.
Deaktiviert CommonStates Das Steuerelement ist deaktiviert.
Focused FocusStates Der Fokus liegt auf dem Steuerelement.
Ohne Fokus FocusStates Der Fokus liegt nicht auf dem Steuerelement.
Expanded ExpansionStates Das -Steuerelement wird erweitert.
Reduziert ExpansionStates Das Steuerelement ist nicht erweitert.
ExpandDown ExpandDirectionStates Das Steuerelement wird nach unten erweitert.
Erweitern ExpandDirectionStates Das Steuerelement wird nach oben erweitert.
ExpandLeft ExpandDirectionStates Das Steuerelement wird nach links erweitert.
ExpandRight ExpandDirectionStates Das Steuerelement wird nach rechts erweitert.
Gültig ValidationStates Das Steuerelement verwendet die Validation-Klasse, und die angefügte Validation.HasError-Eigenschaft ist false.
InvalidFocused ValidationStates Die angefügte Validation.HasError-Eigenschaft ist true, wenn das Steuerelement den Fokus besitzt.
InvalidUnfocused ValidationStates Die angefügte Validation.HasError-Eigenschaft ist true, wenn das Steuerelement den Fokus nicht besitzt.

ControlTemplate für Expander

Das folgende Beispiel ist eine Kopie der Standardvorlage für ein Expander-Steuerelement:

<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
    
    <SolidColorBrush x:Key="Expander.Static.Circle.Stroke" Color="#FF333333"/>
    <SolidColorBrush x:Key="Expander.Static.Circle.Fill" Color="#FFFFFFFF"/>
    <SolidColorBrush x:Key="Expander.Static.Arrow.Stroke" Color="#FF333333"/>
    <SolidColorBrush x:Key="Expander.MouseOver.Circle.Stroke" Color="#FF5593FF"/>
    <SolidColorBrush x:Key="Expander.MouseOver.Circle.Fill" Color="#FFF3F9FF"/>
    <SolidColorBrush x:Key="Expander.MouseOver.Arrow.Stroke" Color="#FF000000"/>
    <SolidColorBrush x:Key="Expander.Pressed.Circle.Stroke" Color="#FF3C77DD"/>
    <SolidColorBrush x:Key="Expander.Pressed.Circle.Fill" Color="#FFD9ECFF"/>
    <SolidColorBrush x:Key="Expander.Pressed.Arrow.Stroke" Color="#FF000000"/>
    <SolidColorBrush x:Key="Expander.Disabled.Circle.Stroke" Color="#FFBCBCBC"/>
    <SolidColorBrush x:Key="Expander.Disabled.Circle.Fill" Color="#FFE6E6E6"/>
    <SolidColorBrush x:Key="Expander.Disabled.Arrow.Stroke" Color="#FF707070"/>
    <Style x:Key="ExpanderHeaderFocusVisual">
        <Setter Property="Control.Template">
            <Setter.Value>
                <ControlTemplate>
                    <Border>
                        <Rectangle Margin="0" StrokeDashArray="1 2" Stroke="Black" SnapsToDevicePixels="true" StrokeThickness="1"/>
                    </Border>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>
    <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="19"/>
                                <ColumnDefinition Width="*"/>
                            </Grid.ColumnDefinitions>
                            <Ellipse x:Name="circle" Fill="{StaticResource Expander.Static.Circle.Fill}" HorizontalAlignment="Center" Height="19" Stroke="{StaticResource Expander.Static.Circle.Stroke}" VerticalAlignment="Center" Width="19"/>
                            <Path x:Name="arrow" Data="M 1,1.5 L 4.5,5 L 8,1.5" HorizontalAlignment="Center" Stroke="{StaticResource Expander.Static.Arrow.Stroke}" SnapsToDevicePixels="false" StrokeThickness="2" VerticalAlignment="Center"/>
                            <ContentPresenter Grid.Column="1" HorizontalAlignment="Left" Margin="4,0,0,0" RecognizesAccessKey="True" SnapsToDevicePixels="True" VerticalAlignment="Center"/>
                        </Grid>
                    </Border>
                    <ControlTemplate.Triggers>
                        <Trigger Property="IsChecked" Value="true">
                            <Setter Property="Data" TargetName="arrow" Value="M 1,4.5  L 4.5,1  L 8,4.5"/>
                        </Trigger>
                        <Trigger Property="IsMouseOver" Value="true">
                            <Setter Property="Stroke" TargetName="circle" Value="{StaticResource Expander.MouseOver.Circle.Stroke}"/>
                            <Setter Property="Fill" TargetName="circle" Value="{StaticResource Expander.MouseOver.Circle.Fill}"/>
                            <Setter Property="Stroke" TargetName="arrow" Value="{StaticResource Expander.MouseOver.Arrow.Stroke}"/>
                        </Trigger>
                        <Trigger Property="IsPressed" Value="true">
                            <Setter Property="Stroke" TargetName="circle" Value="{StaticResource Expander.Pressed.Circle.Stroke}"/>
                            <Setter Property="StrokeThickness" TargetName="circle" Value="1.5"/>
                            <Setter Property="Fill" TargetName="circle" Value="{StaticResource Expander.Pressed.Circle.Fill}"/>
                            <Setter Property="Stroke" TargetName="arrow" Value="{StaticResource Expander.Pressed.Arrow.Stroke}"/>
                        </Trigger>
                        <Trigger Property="IsEnabled" Value="false">
                            <Setter Property="Stroke" TargetName="circle" Value="{StaticResource Expander.Disabled.Circle.Stroke}"/>
                            <Setter Property="Fill" TargetName="circle" Value="{StaticResource Expander.Disabled.Circle.Fill}"/>
                            <Setter Property="Stroke" TargetName="arrow" Value="{StaticResource Expander.Disabled.Arrow.Stroke}"/>
                        </Trigger>
                    </ControlTemplate.Triggers>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>
    <Style x:Key="ExpanderUpHeaderStyle" 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="19"/>
                                <ColumnDefinition Width="*"/>
                            </Grid.ColumnDefinitions>
                            <Grid>
                                <Grid.LayoutTransform>
                                    <TransformGroup>
                                        <TransformGroup.Children>
                                            <TransformCollection>
                                                <RotateTransform Angle="180"/>
                                            </TransformCollection>
                                        </TransformGroup.Children>
                                    </TransformGroup>
                                </Grid.LayoutTransform>
                                <Ellipse x:Name="circle" Fill="{StaticResource Expander.Static.Circle.Fill}" HorizontalAlignment="Center" Height="19" Stroke="{StaticResource Expander.Static.Circle.Stroke}" VerticalAlignment="Center" Width="19"/>
                                <Path x:Name="arrow" Data="M 1,1.5 L 4.5,5 L 8,1.5" HorizontalAlignment="Center" Stroke="{StaticResource Expander.Static.Arrow.Stroke}" SnapsToDevicePixels="false" StrokeThickness="2" VerticalAlignment="Center"/>
                            </Grid>
                            <ContentPresenter Grid.Column="1" HorizontalAlignment="Left" Margin="4,0,0,0" RecognizesAccessKey="True" SnapsToDevicePixels="True" VerticalAlignment="Center"/>
                        </Grid>
                    </Border>
                    <ControlTemplate.Triggers>
                        <Trigger Property="IsChecked" Value="true">
                            <Setter Property="Data" TargetName="arrow" Value="M 1,4.5  L 4.5,1  L 8,4.5"/>
                        </Trigger>
                        <Trigger Property="IsMouseOver" Value="true">
                            <Setter Property="Stroke" TargetName="circle" Value="{StaticResource Expander.MouseOver.Circle.Stroke}"/>
                            <Setter Property="Fill" TargetName="circle" Value="{StaticResource Expander.MouseOver.Circle.Fill}"/>
                            <Setter Property="Stroke" TargetName="arrow" Value="{StaticResource Expander.MouseOver.Arrow.Stroke}"/>
                        </Trigger>
                        <Trigger Property="IsPressed" Value="true">
                            <Setter Property="Stroke" TargetName="circle" Value="{StaticResource Expander.Pressed.Circle.Stroke}"/>
                            <Setter Property="StrokeThickness" TargetName="circle" Value="1.5"/>
                            <Setter Property="Fill" TargetName="circle" Value="{StaticResource Expander.Pressed.Circle.Fill}"/>
                            <Setter Property="Stroke" TargetName="arrow" Value="{StaticResource Expander.Pressed.Arrow.Stroke}"/>
                        </Trigger>
                        <Trigger Property="IsEnabled" Value="false">
                            <Setter Property="Stroke" TargetName="circle" Value="{StaticResource Expander.Disabled.Circle.Stroke}"/>
                            <Setter Property="Fill" TargetName="circle" Value="{StaticResource Expander.Disabled.Circle.Fill}"/>
                            <Setter Property="Stroke" TargetName="arrow" Value="{StaticResource Expander.Disabled.Arrow.Stroke}"/>
                        </Trigger>
                    </ControlTemplate.Triggers>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>
    <Style x:Key="ExpanderLeftHeaderStyle" TargetType="{x:Type ToggleButton}">
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="{x:Type ToggleButton}">
                    <Border Padding="{TemplateBinding Padding}">
                        <Grid Background="Transparent" SnapsToDevicePixels="False">
                            <Grid.RowDefinitions>
                                <RowDefinition Height="19"/>
                                <RowDefinition Height="*"/>
                            </Grid.RowDefinitions>
                            <Grid>
                                <Grid.LayoutTransform>
                                    <TransformGroup>
                                        <TransformGroup.Children>
                                            <TransformCollection>
                                                <RotateTransform Angle="90"/>
                                            </TransformCollection>
                                        </TransformGroup.Children>
                                    </TransformGroup>
                                </Grid.LayoutTransform>
                                <Ellipse x:Name="circle" Fill="{StaticResource Expander.Static.Circle.Fill}" HorizontalAlignment="Center" Height="19" Stroke="{StaticResource Expander.Static.Circle.Stroke}" VerticalAlignment="Center" Width="19"/>
                                <Path x:Name="arrow" Data="M 1,1.5 L 4.5,5 L 8,1.5" HorizontalAlignment="Center" Stroke="{StaticResource Expander.Static.Arrow.Stroke}" SnapsToDevicePixels="false" StrokeThickness="2" VerticalAlignment="Center"/>
                            </Grid>
                            <ContentPresenter HorizontalAlignment="Center" Margin="0,4,0,0" RecognizesAccessKey="True" Grid.Row="1" SnapsToDevicePixels="True" VerticalAlignment="Top"/>
                        </Grid>
                    </Border>
                    <ControlTemplate.Triggers>
                        <Trigger Property="IsChecked" Value="true">
                            <Setter Property="Data" TargetName="arrow" Value="M 1,4.5  L 4.5,1  L 8,4.5"/>
                        </Trigger>
                        <Trigger Property="IsMouseOver" Value="true">
                            <Setter Property="Stroke" TargetName="circle" Value="{StaticResource Expander.MouseOver.Circle.Stroke}"/>
                            <Setter Property="Fill" TargetName="circle" Value="{StaticResource Expander.MouseOver.Circle.Fill}"/>
                            <Setter Property="Stroke" TargetName="arrow" Value="{StaticResource Expander.MouseOver.Arrow.Stroke}"/>
                        </Trigger>
                        <Trigger Property="IsPressed" Value="true">
                            <Setter Property="Stroke" TargetName="circle" Value="{StaticResource Expander.Pressed.Circle.Stroke}"/>
                            <Setter Property="StrokeThickness" TargetName="circle" Value="1.5"/>
                            <Setter Property="Fill" TargetName="circle" Value="{StaticResource Expander.Pressed.Circle.Fill}"/>
                            <Setter Property="Stroke" TargetName="arrow" Value="{StaticResource Expander.Pressed.Arrow.Stroke}"/>
                        </Trigger>
                        <Trigger Property="IsEnabled" Value="false">
                            <Setter Property="Stroke" TargetName="circle" Value="{StaticResource Expander.Disabled.Circle.Stroke}"/>
                            <Setter Property="Fill" TargetName="circle" Value="{StaticResource Expander.Disabled.Circle.Fill}"/>
                            <Setter Property="Stroke" TargetName="arrow" Value="{StaticResource Expander.Disabled.Arrow.Stroke}"/>
                        </Trigger>
                    </ControlTemplate.Triggers>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>
    <Style x:Key="ExpanderRightHeaderStyle" TargetType="{x:Type ToggleButton}">
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="{x:Type ToggleButton}">
                    <Border Padding="{TemplateBinding Padding}">
                        <Grid Background="Transparent" SnapsToDevicePixels="False">
                            <Grid.RowDefinitions>
                                <RowDefinition Height="19"/>
                                <RowDefinition Height="*"/>
                            </Grid.RowDefinitions>
                            <Grid>
                                <Grid.LayoutTransform>
                                    <TransformGroup>
                                        <TransformGroup.Children>
                                            <TransformCollection>
                                                <RotateTransform Angle="-90"/>
                                            </TransformCollection>
                                        </TransformGroup.Children>
                                    </TransformGroup>
                                </Grid.LayoutTransform>
                                <Ellipse x:Name="circle" Fill="{StaticResource Expander.Static.Circle.Fill}" HorizontalAlignment="Center" Height="19" Stroke="{StaticResource Expander.Static.Circle.Stroke}" VerticalAlignment="Center" Width="19"/>
                                <Path x:Name="arrow" Data="M 1,1.5 L 4.5,5 L 8,1.5" HorizontalAlignment="Center" Stroke="{StaticResource Expander.Static.Arrow.Stroke}" SnapsToDevicePixels="false" StrokeThickness="2" VerticalAlignment="Center"/>
                            </Grid>
                            <ContentPresenter HorizontalAlignment="Center" Margin="0,4,0,0" RecognizesAccessKey="True" Grid.Row="1" SnapsToDevicePixels="True" VerticalAlignment="Top"/>
                        </Grid>
                    </Border>
                    <ControlTemplate.Triggers>
                        <Trigger Property="IsChecked" Value="true">
                            <Setter Property="Data" TargetName="arrow" Value="M 1,4.5  L 4.5,1  L 8,4.5"/>
                        </Trigger>
                        <Trigger Property="IsMouseOver" Value="true">
                            <Setter Property="Stroke" TargetName="circle" Value="{StaticResource Expander.MouseOver.Circle.Stroke}"/>
                            <Setter Property="Fill" TargetName="circle" Value="{StaticResource Expander.MouseOver.Circle.Fill}"/>
                            <Setter Property="Stroke" TargetName="arrow" Value="{StaticResource Expander.MouseOver.Arrow.Stroke}"/>
                        </Trigger>
                        <Trigger Property="IsPressed" Value="true">
                            <Setter Property="Stroke" TargetName="circle" Value="{StaticResource Expander.Pressed.Circle.Stroke}"/>
                            <Setter Property="StrokeThickness" TargetName="circle" Value="1.5"/>
                            <Setter Property="Fill" TargetName="circle" Value="{StaticResource Expander.Pressed.Circle.Fill}"/>
                            <Setter Property="Stroke" TargetName="arrow" Value="{StaticResource Expander.Pressed.Arrow.Stroke}"/>
                        </Trigger>
                        <Trigger Property="IsEnabled" Value="false">
                            <Setter Property="Stroke" TargetName="circle" Value="{StaticResource Expander.Disabled.Circle.Stroke}"/>
                            <Setter Property="Fill" TargetName="circle" Value="{StaticResource Expander.Disabled.Circle.Fill}"/>
                            <Setter Property="Stroke" TargetName="arrow" Value="{StaticResource Expander.Disabled.Arrow.Stroke}"/>
                        </Trigger>
                    </ControlTemplate.Triggers>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>
    <Style x:Key="ExpanderStyle1" 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" ContentTemplate="{TemplateBinding HeaderTemplate}" Content="{TemplateBinding Header}" ContentTemplateSelector="{TemplateBinding HeaderTemplateSelector}" DockPanel.Dock="Top" FontStretch="{TemplateBinding FontStretch}" Foreground="{TemplateBinding Foreground}" FocusVisualStyle="{StaticResource ExpanderHeaderFocusVisual}" FontStyle="{TemplateBinding FontStyle}" FontFamily="{TemplateBinding FontFamily}" FontWeight="{TemplateBinding FontWeight}" FontSize="{TemplateBinding FontSize}" HorizontalContentAlignment="{TemplateBinding HorizontalContentAlignment}" IsChecked="{Binding IsExpanded, Mode=TwoWay, RelativeSource={RelativeSource TemplatedParent}}" Margin="1" MinWidth="0" MinHeight="0" Padding="{TemplateBinding Padding}" Style="{StaticResource ExpanderDownHeaderStyle}" VerticalContentAlignment="{TemplateBinding VerticalContentAlignment}"/>
                            <ContentPresenter x:Name="ExpandSite" DockPanel.Dock="Bottom" Focusable="false" HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" Margin="{TemplateBinding Padding}" VerticalAlignment="{TemplateBinding VerticalContentAlignment}" Visibility="Collapsed"/>
                        </DockPanel>
                    </Border>
                    <ControlTemplate.Triggers>
                        <Trigger Property="IsExpanded" Value="true">
                            <Setter Property="Visibility" TargetName="ExpandSite" Value="Visible"/>
                        </Trigger>
                        <Trigger Property="ExpandDirection" Value="Right">
                            <Setter Property="DockPanel.Dock" TargetName="ExpandSite" Value="Right"/>
                            <Setter Property="DockPanel.Dock" TargetName="HeaderSite" Value="Left"/>
                            <Setter Property="Style" TargetName="HeaderSite" Value="{StaticResource ExpanderRightHeaderStyle}"/>
                        </Trigger>
                        <Trigger Property="ExpandDirection" Value="Up">
                            <Setter Property="DockPanel.Dock" TargetName="ExpandSite" Value="Top"/>
                            <Setter Property="DockPanel.Dock" TargetName="HeaderSite" Value="Bottom"/>
                            <Setter Property="Style" TargetName="HeaderSite" Value="{StaticResource ExpanderUpHeaderStyle}"/>
                        </Trigger>
                        <Trigger Property="ExpandDirection" Value="Left">
                            <Setter Property="DockPanel.Dock" TargetName="ExpandSite" Value="Left"/>
                            <Setter Property="DockPanel.Dock" TargetName="HeaderSite" Value="Right"/>
                            <Setter Property="Style" TargetName="HeaderSite" Value="{StaticResource ExpanderLeftHeaderStyle}"/>
                        </Trigger>
                        <Trigger Property="IsEnabled" Value="false">
                            <Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.GrayTextBrushKey}}"/>
                        </Trigger>
                    </ControlTemplate.Triggers>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>
</ResourceDictionary>

Siehe auch