エクスパンダーのスタイルとテンプレートExpander Styles and Templates

このトピックでは、Expander コントロールのスタイルとテンプレートについて説明します。This topic describes the styles and templates for the Expander control. ControlTemplateの既定値を変更して外観を制御します。You can modify the default ControlTemplate to give the control a unique appearance. 詳細については、「Customizing the Appearance of an Existing Control by Creating a ControlTemplate」を参照してください。For more information, see Customizing the Appearance of an Existing Control by Creating a ControlTemplate.

エキスパンダーパーツExpander Parts

Expander コントロールには、名前付きの部分がありません。The Expander control does not have any named parts.

展開の状態Expander States

次の表は、Expander コントロールの表示状態を示しています。The following table lists the visual states for the Expander control.

VisualState 名VisualState Name VisualStateGroup 名VisualStateGroup Name 説明Description
標準Normal CommonStatesCommonStates 既定の状態です。The default state.
MouseOverMouseOver CommonStatesCommonStates マウス ポインターがコントロール上に配置されます。The mouse pointer is positioned over the control.
DisabledDisabled CommonStatesCommonStates コントロールが無効になっています。The control is disabled.
フォーカスされているFocused FocusStatesFocusStates コントロールにフォーカスがあります。The control has focus.
フォーカスされていないUnfocused FocusStatesFocusStates コントロールにフォーカスがありません。The control does not have focus.
[展開済み]Expanded すべての状態ExpansionStates コントロールが展開されます。The control is expanded.
CollapsedCollapsed すべての状態ExpansionStates コントロールが展開されていません。The control is not expanded.
ExpandDownExpandDown Expanddirection の状態ExpandDirectionStates コントロールが下方向に拡張されます。The control expands down.
ExpandUpExpandUp Expanddirection の状態ExpandDirectionStates コントロールが拡張されます。The control expands up.
ExpandLeftExpandLeft Expanddirection の状態ExpandDirectionStates コントロールが左に展開されます。The control expands left.
ExpandRightExpandRight Expanddirection の状態ExpandDirectionStates コントロールが右に展開されます。The control expands right.
有効Valid ValidationStatesValidationStates コントロールは Validation クラスを使用し、HasError 添付プロパティは falseます。The control uses the Validation class and the HasError attached property is false.
InvalidFocusedInvalidFocused ValidationStatesValidationStates HasError 添付プロパティは、コントロールにフォーカスがある true です。The HasError attached property is true has the control has focus.
InvalidUnfocusedInvalidUnfocused ValidationStatesValidationStates HasError 添付プロパティは、コントロールにフォーカスがない true です。The HasError attached property is true has the control does not have focus.

エキスパンダー ControlTemplate の例Expander ControlTemplate Example

次の例は、Expander コントロールの ControlTemplate を定義する方法を示しています。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>

前の例では、次のリソースの 1 つ以上を使用します。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>

完全なサンプルについては、Styling with ControlTemplates Sampleを参照してください。For the complete sample, see Styling with ControlTemplates Sample.

関連項目See also