Expander-Stile und -VorlagenExpander Styles and Templates

In diesem Thema werden die Stile und Vorlagen für das Expander-Steuerelement beschrieben.This topic describes the styles and templates for the Expander control. Sie können die Standard ControlTemplate ändern, um dem Steuerelement eine eindeutige Darstellung zu verschaffen.You can modify the default ControlTemplate to give the control a unique appearance. Weitere Informationen finden Sie unter Anpassen der Darstellung eines vorhandenen Steuerelements durch Erstellen einer ControlTemplate.For more information, see Customizing the Appearance of an Existing Control by Creating a ControlTemplate.

Expander-TeileExpander Parts

Das Expander-Steuerelement verfügt über keine benannten Teile.The Expander control does not have any named parts.

Expander-ZuständeExpander States

In der folgenden Tabelle werden die visuellen Zustände für das Expander-Steuerelement aufgelistet.The following table lists the visual states for the Expander control.

VisualState-NameVisualState Name VisualStateGroup-NameVisualStateGroup Name BeschreibungDescription
NormalNormal CommonStatesCommonStates Der StandardzustandThe default state.
MouseOverMouseOver CommonStatesCommonStates Der Mauszeiger befindet sich auf dem Steuerelement.The mouse pointer is positioned over the control.
DeaktiviertDisabled CommonStatesCommonStates Das Steuerelement ist deaktiviert.The control is disabled.
Mit FokusFocused FocusStatesFocusStates Der Fokus liegt auf dem Steuerelement.The control has focus.
Ohne FokusUnfocused FocusStatesFocusStates Der Fokus liegt nicht auf dem Steuerelement.The control does not have focus.
ErweitertExpanded Expansions ZuständeExpansionStates Das-Steuerelement ist erweitert.The control is expanded.
ReduziertCollapsed Expansions ZuständeExpansionStates Das Steuerelement wird nicht erweitert.The control is not expanded.
ErweiterdownExpandDown ExpanddirectionstatesExpandDirectionStates Das Steuerelement wird nach unten erweitert.The control expands down.
ExpansionExpandUp ExpanddirectionstatesExpandDirectionStates Das-Steuerelement wird erweitert.The control expands up.
ExpandleftExpandLeft ExpanddirectionstatesExpandDirectionStates Das Steuerelement wird nach links erweitert.The control expands left.
ExpandrightExpandRight ExpanddirectionstatesExpandDirectionStates Das Steuerelement wird nach rechts erweitert.The control expands right.
GültigValid ValidationStatesValidationStates Das-Steuerelement verwendet die Validation-Klasse, und die HasError angefügte-Eigenschaft ist false.The control uses the Validation class and the HasError attached property is false.
InvalidFocusedInvalidFocused ValidationStatesValidationStates Die HasError angefügte Eigenschaft ist true hat, dass das Steuerelement den Fokus besitzt.The HasError attached property is true has the control has focus.
InvalidUnfocusedInvalidUnfocused ValidationStatesValidationStates Die HasError angefügte Eigenschaft ist true, wenn das Steuerelement keinen Fokus hat.The HasError attached property is true has the control does not have focus.

Expander ControlTemplate-BeispielExpander ControlTemplate Example

Im folgenden Beispiel wird gezeigt, wie ein ControlTemplate für das Expander-Steuerelement definiert wird.The following example shows how to define a ControlTemplate for the Expander control.

<ControlTemplate x:Key="ExpanderToggleButton"
                 TargetType="{x:Type ToggleButton}">
  <Border x:Name="Border"
          CornerRadius="2,0,0,0"
          BorderThickness="0,0,1,0">
    <Border.Background>
      <LinearGradientBrush EndPoint="0.5,1"
                           StartPoint="0.5,0">
        <GradientStop Color="{DynamicResource ControlLightColor}" />
        <GradientStop Color="{DynamicResource ControlMediumColor}"
                      Offset="1" />
      </LinearGradientBrush>
    </Border.Background>
    <Border.BorderBrush>
      <LinearGradientBrush StartPoint="0,0"
                           EndPoint="0,1">
        <LinearGradientBrush.GradientStops>
          <GradientStopCollection>
            <GradientStop Color="{DynamicResource BorderLightColor}"
                          Offset="0.0" />
            <GradientStop Color="{DynamicResource BorderDarkColor}"
                          Offset="1.0" />
          </GradientStopCollection>
        </LinearGradientBrush.GradientStops>
      </LinearGradientBrush>

    </Border.BorderBrush>
    <VisualStateManager.VisualStateGroups>
      <VisualStateGroup x:Name="CommonStates">
        <VisualState x:Name="Normal" />
        <VisualState x:Name="MouseOver">
          <Storyboard>
            <ColorAnimationUsingKeyFrames Storyboard.TargetName="Border"
                                          Storyboard.TargetProperty="(Panel.Background).
                (GradientBrush.GradientStops)[1].(GradientStop.Color)">
              <EasingColorKeyFrame KeyTime="0"
                                   Value="{StaticResource ControlMouseOverColor}" />
            </ColorAnimationUsingKeyFrames>
          </Storyboard>
        </VisualState>
        <VisualState x:Name="Pressed">
          <Storyboard>
            <ColorAnimationUsingKeyFrames Storyboard.TargetName="Border"
                                          Storyboard.TargetProperty="(Panel.Background).
                (GradientBrush.GradientStops)[1].(GradientStop.Color)">
              <EasingColorKeyFrame KeyTime="0"
                                   Value="{StaticResource ControlPressedColor}" />
            </ColorAnimationUsingKeyFrames>
          </Storyboard>
        </VisualState>
        <VisualState x:Name="Disabled">
          <Storyboard>
            <ColorAnimationUsingKeyFrames Storyboard.TargetName="Border"
                                          Storyboard.TargetProperty="(Panel.Background).
                (GradientBrush.GradientStops)[1].(GradientStop.Color)">
              <EasingColorKeyFrame KeyTime="0"
                                   Value="{StaticResource DisabledControlDarkColor}" />
            </ColorAnimationUsingKeyFrames>
            <ColorAnimationUsingKeyFrames Storyboard.TargetName="Border"
                                          Storyboard.TargetProperty="(Border.BorderBrush).
                (GradientBrush.GradientStops)[1].(GradientStop.Color)">
              <EasingColorKeyFrame KeyTime="0"
                                   Value="{StaticResource DisabledBorderLightColor}" />
            </ColorAnimationUsingKeyFrames>
          </Storyboard>
        </VisualState>
      </VisualStateGroup>
      <VisualStateGroup x:Name="CheckStates">
        <VisualState x:Name="Checked">
          <Storyboard>
            <ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.Visibility)"
                                           Storyboard.TargetName="CollapsedArrow">
              <DiscreteObjectKeyFrame KeyTime="0"
                                      Value="{x:Static Visibility.Hidden}" />
            </ObjectAnimationUsingKeyFrames>
            <ObjectAnimationUsingKeyFrames Storyboard.TargetProperty="(UIElement.Visibility)"
                                           Storyboard.TargetName="ExpandededArrow">
              <DiscreteObjectKeyFrame KeyTime="0"
                                      Value="{x:Static Visibility.Visible}" />
            </ObjectAnimationUsingKeyFrames>
          </Storyboard>
        </VisualState>
        <VisualState x:Name="Unchecked" />
        <VisualState x:Name="Indeterminate" />
      </VisualStateGroup>
    </VisualStateManager.VisualStateGroups>
    <Grid>
      <Path x:Name="CollapsedArrow"
            HorizontalAlignment="Center"
            VerticalAlignment="Center"
            Data="M 0 0 L 4 4 L 8 0 Z">
        <Path.Fill>
          <SolidColorBrush Color="{DynamicResource GlyphColor}" />
        </Path.Fill>
      </Path>
      <Path x:Name="ExpandededArrow"
            HorizontalAlignment="Center"
            VerticalAlignment="Center"
            Visibility="Collapsed"
            Data="M 0 4 L 4 0 L 8 4 Z">
        <Path.Fill>
          <SolidColorBrush Color="{DynamicResource GlyphColor}" />
        </Path.Fill>
      </Path>
    </Grid>
  </Border>
</ControlTemplate>

<Style TargetType="{x:Type Expander}">
  <Setter Property="Template">
    <Setter.Value>
      <ControlTemplate TargetType="{x:Type Expander}">
        <Grid>
          <Grid.RowDefinitions>
            <RowDefinition Height="Auto" />
            <RowDefinition x:Name="ContentRow"
                           Height="0" />
          </Grid.RowDefinitions>
          <VisualStateManager.VisualStateGroups>
            <VisualStateGroup x:Name="CommonStates">
              <VisualState x:Name="Normal" />
              <VisualState x:Name="MouseOver" />
              <VisualState x:Name="Disabled">
                <Storyboard>
                  <ColorAnimationUsingKeyFrames Storyboard.TargetName="Border"
                                                Storyboard.TargetProperty="(Panel.Background).
                      (GradientBrush.GradientStops)[1].(GradientStop.Color)">
                    <EasingColorKeyFrame KeyTime="0"
                                         Value="{StaticResource DisabledControlDarkColor}" />
                  </ColorAnimationUsingKeyFrames>
                  <ColorAnimationUsingKeyFrames Storyboard.TargetName="Border"
                                                Storyboard.TargetProperty="(Border.BorderBrush).
                      (GradientBrush.GradientStops)[1].(GradientStop.Color)">
                    <EasingColorKeyFrame KeyTime="0"
                                         Value="{StaticResource DisabledBorderLightColor}" />
                  </ColorAnimationUsingKeyFrames>
                </Storyboard>
              </VisualState>
            </VisualStateGroup>
          </VisualStateManager.VisualStateGroups>
          <Border x:Name="Border"
                  Grid.Row="0"
                  BorderThickness="1"
                  CornerRadius="2,2,0,0">
            <Border.BorderBrush>
              <LinearGradientBrush EndPoint="0,1"
                                   StartPoint="0,0">
                <GradientStop Color="{DynamicResource BorderLightColor}"
                              Offset="0" />
                <GradientStop Color="{DynamicResource BorderDarkColor}"
                              Offset="1" />
              </LinearGradientBrush>

            </Border.BorderBrush>
            <Border.Background>

              <LinearGradientBrush StartPoint="0,0"
                                   EndPoint="0,1">
                <LinearGradientBrush.GradientStops>
                  <GradientStopCollection>
                    <GradientStop Color="{DynamicResource ControlLightColor}"
                                  Offset="0.0" />
                    <GradientStop Color="{DynamicResource ControlMediumColor}"
                                  Offset="1.0" />
                  </GradientStopCollection>
                </LinearGradientBrush.GradientStops>
              </LinearGradientBrush>

            </Border.Background>
            <Grid>
              <Grid.ColumnDefinitions>
                <ColumnDefinition Width="20" />
                <ColumnDefinition Width="*" />
              </Grid.ColumnDefinitions>
              <ToggleButton OverridesDefaultStyle="True"
                            Template="{StaticResource ExpanderToggleButton}"
                            IsChecked="{Binding IsExpanded, Mode=TwoWay, 
                  RelativeSource={RelativeSource TemplatedParent}}">
                <ToggleButton.Background>
                  <LinearGradientBrush EndPoint="0.5,1"
                                       StartPoint="0.5,0">
                    <GradientStop Color="{DynamicResource ControlLightColor}"
                                  Offset="0" />
                    <GradientStop Color="{DynamicResource ControlMediumColor}"
                                  Offset="1" />
                  </LinearGradientBrush>
                </ToggleButton.Background>
              </ToggleButton>
              <ContentPresenter Grid.Column="1"
                                Margin="4"
                                ContentSource="Header"
                                RecognizesAccessKey="True" />
            </Grid>
          </Border>
          <Border x:Name="Content"
                  Grid.Row="1"
                  BorderThickness="1,0,1,1"
                  CornerRadius="0,0,2,2">
            <Border.BorderBrush>
              <SolidColorBrush Color="{DynamicResource BorderMediumColor}" />
            </Border.BorderBrush>
            <Border.Background>
              <SolidColorBrush Color="{DynamicResource ContentAreaColorDark}" />
            </Border.Background>
            <ContentPresenter Margin="4" />
          </Border>
        </Grid>
        <ControlTemplate.Triggers>
          <Trigger Property="IsExpanded"
                   Value="True">
            <Setter TargetName="ContentRow"
                    Property="Height"
                    Value="{Binding DesiredHeight, ElementName=Content}" />
          </Trigger>
        </ControlTemplate.Triggers>
      </ControlTemplate>
    </Setter.Value>
  </Setter>
</Style>

Im vorhergehenden Beispiel wird mindestens eine der folgenden Ressourcen verwendet.The preceding example uses one or more of the following resources.

<!--Control colors.-->
<Color x:Key="WindowColor">#FFE8EDF9</Color>
<Color x:Key="ContentAreaColorLight">#FFC5CBF9</Color>
<Color x:Key="ContentAreaColorDark">#FF7381F9</Color>

<Color x:Key="DisabledControlLightColor">#FFE8EDF9</Color>
<Color x:Key="DisabledControlDarkColor">#FFC5CBF9</Color>
<Color x:Key="DisabledForegroundColor">#FF888888</Color>

<Color x:Key="SelectedBackgroundColor">#FFC5CBF9</Color>
<Color x:Key="SelectedUnfocusedColor">#FFDDDDDD</Color>

<Color x:Key="ControlLightColor">White</Color>
<Color x:Key="ControlMediumColor">#FF7381F9</Color>
<Color x:Key="ControlDarkColor">#FF211AA9</Color>

<Color x:Key="ControlMouseOverColor">#FF3843C4</Color>
<Color x:Key="ControlPressedColor">#FF211AA9</Color>


<Color x:Key="GlyphColor">#FF444444</Color>
<Color x:Key="GlyphMouseOver">sc#1, 0.004391443, 0.002428215, 0.242281124</Color>

<!--Border colors-->
<Color x:Key="BorderLightColor">#FFCCCCCC</Color>
<Color x:Key="BorderMediumColor">#FF888888</Color>
<Color x:Key="BorderDarkColor">#FF444444</Color>

<Color x:Key="PressedBorderLightColor">#FF888888</Color>
<Color x:Key="PressedBorderDarkColor">#FF444444</Color>

<Color x:Key="DisabledBorderLightColor">#FFAAAAAA</Color>
<Color x:Key="DisabledBorderDarkColor">#FF888888</Color>

<Color x:Key="DefaultBorderBrushDarkColor">Black</Color>

<!--Control-specific resources.-->
<Color x:Key="HeaderTopColor">#FFC5CBF9</Color>
<Color x:Key="DatagridCurrentCellBorderColor">Black</Color>
<Color x:Key="SliderTrackDarkColor">#FFC5CBF9</Color>

<Color x:Key="NavButtonFrameColor">#FF3843C4</Color>

<LinearGradientBrush x:Key="MenuPopupBrush"
                     EndPoint="0.5,1"
                     StartPoint="0.5,0">
  <GradientStop Color="{DynamicResource ControlLightColor}"
                Offset="0" />
  <GradientStop Color="{DynamicResource ControlMediumColor}"
                Offset="0.5" />
  <GradientStop Color="{DynamicResource ControlLightColor}"
                Offset="1" />
</LinearGradientBrush>

<LinearGradientBrush x:Key="ProgressBarIndicatorAnimatedFill"
                     StartPoint="0,0"
                     EndPoint="1,0">
  <LinearGradientBrush.GradientStops>
    <GradientStopCollection>
      <GradientStop Color="#000000FF"
                    Offset="0" />
      <GradientStop Color="#600000FF"
                    Offset="0.4" />
      <GradientStop Color="#600000FF"
                    Offset="0.6" />
      <GradientStop Color="#000000FF"
                    Offset="1" />
    </GradientStopCollection>
  </LinearGradientBrush.GradientStops>
</LinearGradientBrush>

Das vollständige Beispiel finden Sie unter Beispiel zum Formatieren mit ControlTemplates.For the complete sample, see Styling with ControlTemplates Sample.

Siehe auchSee also