Stili e modelli di ListView

In questo argomento vengono descritti gli stili e i modelli per il controllo ListView. È possibile modificare l'oggetto ControlTemplate predefinito per conferire al controllo un aspetto univoco. Per ulteriori informazioni, vedere Personalizzazione dell'aspetto di un controllo esistente mediante la creazione di un oggetto ControlTemplate.

Parti del controllo ListView

Il controllo ListView non include parti denominate.

Quando si crea ControlTemplate per un oggetto ListView, il modello potrebbe contenere ItemsPresenter all'interno di ScrollViewer. L'oggetto ItemsPresenter visualizza ogni elemento in ListView; ScrollViewer consente lo scorrimento all'interno del controllo. Se ItemsPresenter non è l'elemento figlio diretto di ScrollViewer, è necessario assegnare a ItemsPresenter il nome ItemsPresenter.

Stati del controllo ListView

Nella tabella seguente sono elencati gli stati visivi per il controllo ListView.

Nome VisualState	Nome VisualStateGroup	Descrizione
Valid	ValidationStates	Il controllo utilizza la classe Validation e la proprietà associata Validation.HasError è false.
InvalidFocused	ValidationStates	La proprietà associata Validation.HasError è true e il controllo ha lo stato attivo.
InvalidUnfocused	ValidationStates	La proprietà associata Validation.HasError è true e il controllo non ha lo stato attivo.

Parti del controllo ListViewItem

Il controllo ListViewItem non include parti denominate.

Stati del controllo ListViewItem

Nella tabella seguente sono elencati gli stati per il controllo ListViewItem.

Nome VisualState	Nome VisualStateGroup	Descrizione
Normal	CommonStates	Stato predefinito.
Disabled	CommonStates	Il controllo è disabilitato.
MouseOver	CommonStates	Il puntatore del mouse si trova sopra il controllo ComboBox.
Focused	FocusStates	Il controllo presenta lo stato attivo.
Unfocused	FocusStates	Il controllo non presenta lo stato attivo.
Selected	SelectionStates	L'elemento è attualmente selezionato.
Unselected	SelectionStates	L'elemento non è attualmente selezionato.
SelectedUnfocused	SelectionStates	L'elemento è selezionato, ma non dispone dello stato attivo.
Valid	ValidationStates	Il controllo utilizza la classe Validation e la proprietà associata Validation.HasError è false.
InvalidFocused	ValidationStates	La proprietà associata Validation.HasError è true e il controllo ha lo stato attivo.
InvalidUnfocused	ValidationStates	La proprietà associata Validation.HasError è true e il controllo non ha lo stato attivo.

Esempi di ControlTemplate del controllo ListView

Nell'esempio seguente viene illustrato come definire un oggetto ControlTemplate per il controllo ListView e i tipi associati.

<Style x:Key="{x:Static GridView.GridViewScrollViewerStyleKey}"
       TargetType="ScrollViewer">
  <Setter Property="Template">
    <Setter.Value>
      <ControlTemplate TargetType="ScrollViewer">
        <Grid Background="{TemplateBinding Background}">
          <Grid.ColumnDefinitions>
            <ColumnDefinition Width="*" />
            <ColumnDefinition Width="Auto" />
          </Grid.ColumnDefinitions>
          <Grid.RowDefinitions>
            <RowDefinition Height="*" />
            <RowDefinition Height="Auto" />
          </Grid.RowDefinitions>

          <DockPanel Margin="{TemplateBinding Padding}">
            <ScrollViewer DockPanel.Dock="Top"
                          HorizontalScrollBarVisibility="Hidden"
                          VerticalScrollBarVisibility="Hidden"
                          Focusable="false">
              <GridViewHeaderRowPresenter Margin="2,0,2,0"
                                          Columns="{Binding Path=TemplatedParent.View.Columns,
                RelativeSource={RelativeSource TemplatedParent}}"
                                          ColumnHeaderContainerStyle="{Binding
                Path=TemplatedParent.View.ColumnHeaderContainerStyle,
                RelativeSource={RelativeSource TemplatedParent}}"
                                          ColumnHeaderTemplate="{Binding
                Path=TemplatedParent.View.ColumnHeaderTemplate,
                RelativeSource={RelativeSource TemplatedParent}}"
                                          ColumnHeaderTemplateSelector="{Binding 
                Path=TemplatedParent.View.ColumnHeaderTemplateSelector,
                RelativeSource={RelativeSource TemplatedParent}}"
                                          AllowsColumnReorder="{Binding
                Path=TemplatedParent.View.AllowsColumnReorder,
                RelativeSource={RelativeSource TemplatedParent}}"
                                          ColumnHeaderContextMenu="{Binding
                Path=TemplatedParent.View.ColumnHeaderContextMenu,
                RelativeSource={RelativeSource TemplatedParent}}"
                                          ColumnHeaderToolTip="{Binding
                Path=TemplatedParent.View.ColumnHeaderToolTip,
                RelativeSource={RelativeSource TemplatedParent}}"
                                          SnapsToDevicePixels="{TemplateBinding
                SnapsToDevicePixels}" />
            </ScrollViewer>

            <ScrollContentPresenter Name="PART_ScrollContentPresenter"
                                    KeyboardNavigation.DirectionalNavigation="Local"
                                    CanContentScroll="True"
                                    CanHorizontallyScroll="False"
                                    CanVerticallyScroll="False" />
          </DockPanel>

          <ScrollBar Name="PART_HorizontalScrollBar"
                     Orientation="Horizontal"
                     Grid.Row="1"
                     Maximum="{TemplateBinding ScrollableWidth}"
                     ViewportSize="{TemplateBinding ViewportWidth}"
                     Value="{TemplateBinding HorizontalOffset}"
                     Visibility="{TemplateBinding ComputedHorizontalScrollBarVisibility}" />

          <ScrollBar Name="PART_VerticalScrollBar"
                     Grid.Column="1"
                     Maximum="{TemplateBinding ScrollableHeight}"
                     ViewportSize="{TemplateBinding ViewportHeight}"
                     Value="{TemplateBinding VerticalOffset}"
                     Visibility="{TemplateBinding ComputedVerticalScrollBarVisibility}" />

        </Grid>
      </ControlTemplate>
    </Setter.Value>
  </Setter>
</Style>

<Style x:Key="GridViewColumnHeaderGripper"
       TargetType="Thumb">
  <Setter Property="Width"
          Value="18" />
  <Setter Property="Background">
    <Setter.Value>
      <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>
    </Setter.Value>
  </Setter>
  <Setter Property="Template">
    <Setter.Value>
      <ControlTemplate TargetType="{x:Type Thumb}">
        <Border Padding="{TemplateBinding Padding}"
                Background="Transparent">
          <Rectangle HorizontalAlignment="Center"
                     Width="1"
                     Fill="{TemplateBinding Background}" />
        </Border>
      </ControlTemplate>
    </Setter.Value>
  </Setter>
  <Setter Property="BorderBrush">
    <Setter.Value>
      <LinearGradientBrush EndPoint="0.5,1"
                           StartPoint="0.5,0">
        <GradientStop Color="Black"
                      Offset="0" />
        <GradientStop Color="White"
                      Offset="1" />
      </LinearGradientBrush>
    </Setter.Value>
  </Setter>
</Style>

<Style x:Key="{x:Type GridViewColumnHeader}"
       TargetType="GridViewColumnHeader">
  <Setter Property="HorizontalContentAlignment"
          Value="Center" />
  <Setter Property="VerticalContentAlignment"
          Value="Center" />
  <Setter Property="Foreground"
          Value="{DynamicResource {x:Static SystemColors.ControlTextBrushKey}}" />
  <Setter Property="Template">
    <Setter.Value>
      <ControlTemplate TargetType="GridViewColumnHeader">
        <Grid>
          <VisualStateManager.VisualStateGroups>
            <VisualStateGroup x:Name="CommonStates">
              <VisualState x:Name="Normal" />
              <VisualState x:Name="MouseOver">
                <Storyboard>
                  <ColorAnimationUsingKeyFrames Storyboard.TargetProperty="(Panel.Background).
                    (GradientBrush.GradientStops)[1].(GradientStop.Color)"
                                                Storyboard.TargetName="HeaderBorder">
                    <EasingColorKeyFrame KeyTime="0"
                                         Value="{StaticResource ControlMouseOverColor}" />
                  </ColorAnimationUsingKeyFrames>
                </Storyboard>
              </VisualState>
              <VisualState x:Name="Pressed" />
              <VisualState x:Name="Disabled" />
            </VisualStateGroup>
          </VisualStateManager.VisualStateGroups>
          <Border x:Name="HeaderBorder"
                  BorderThickness="0,1,0,1"
                  Padding="2,0,2,0">
            <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>
            <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>
            <ContentPresenter x:Name="HeaderContent"
                              Margin="0,0,0,1"
                              RecognizesAccessKey="True"
                              VerticalAlignment="{TemplateBinding VerticalContentAlignment}"
                              HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"
                              SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}"/>
          </Border>
          <Thumb x:Name="PART_HeaderGripper"
                 HorizontalAlignment="Right"
                 Margin="0,0,-9,0"
                 Style="{StaticResource GridViewColumnHeaderGripper}" />
        </Grid>
      </ControlTemplate>
    </Setter.Value>
  </Setter>
  <Style.Triggers>
    <Trigger Property="Role"
             Value="Floating">
      <Setter Property="Opacity"
              Value="0.7" />
      <Setter Property="Template">
        <Setter.Value>
          <ControlTemplate TargetType="GridViewColumnHeader">
            <Canvas Name="PART_FloatingHeaderCanvas">
              <Rectangle Fill="#60000000"
                         Width="{TemplateBinding ActualWidth}"
                         Height="{TemplateBinding ActualHeight}" />
            </Canvas>
          </ControlTemplate>
        </Setter.Value>
      </Setter>
    </Trigger>
    <Trigger Property="Role"
             Value="Padding">
      <Setter Property="Template">
        <Setter.Value>
          <ControlTemplate TargetType="GridViewColumnHeader">
            <Border Name="HeaderBorder"
                    BorderThickness="0,1,0,1">
              <Border.Background>
                <SolidColorBrush Color="{DynamicResource ControlLightColor}" />
              </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>
            </Border>
          </ControlTemplate>
        </Setter.Value>
      </Setter>
    </Trigger>
  </Style.Triggers>
</Style>

<Style x:Key="{x:Type ListView}"
       TargetType="ListView">
  <Setter Property="SnapsToDevicePixels"
          Value="true" />
  <Setter Property="OverridesDefaultStyle"
          Value="true" />
  <Setter Property="ScrollViewer.HorizontalScrollBarVisibility"
          Value="Auto" />
  <Setter Property="ScrollViewer.VerticalScrollBarVisibility"
          Value="Auto" />
  <Setter Property="ScrollViewer.CanContentScroll"
          Value="true" />
  <Setter Property="VerticalContentAlignment"
          Value="Center" />
  <Setter Property="Template">
    <Setter.Value>
      <ControlTemplate TargetType="ListView">
        <Border Name="Border"
                BorderThickness="1">
          <Border.Background>
            <SolidColorBrush Color="{StaticResource ControlLightColor}" />
          </Border.Background>
          <Border.BorderBrush>
            <SolidColorBrush Color="{StaticResource BorderMediumColor}" />
          </Border.BorderBrush>
          <ScrollViewer Style="{DynamicResource
                        {x:Static GridView.GridViewScrollViewerStyleKey}}">
            <ItemsPresenter />
          </ScrollViewer>
        </Border>
        <ControlTemplate.Triggers>
          <Trigger Property="IsGrouping"
                   Value="true">
            <Setter Property="ScrollViewer.CanContentScroll"
                    Value="false" />
          </Trigger>
          <Trigger Property="IsEnabled"
                   Value="false">
            <Setter TargetName="Border"
                    Property="Background">
              <Setter.Value>
                <SolidColorBrush Color="{DynamicResource DisabledBorderLightColor}" />
              </Setter.Value>
            </Setter>
          </Trigger>
        </ControlTemplate.Triggers>
      </ControlTemplate>
    </Setter.Value>
  </Setter>
</Style>

<Style x:Key="{x:Type ListViewItem}"
       TargetType="ListViewItem">
  <Setter Property="SnapsToDevicePixels"
          Value="true" />
  <Setter Property="OverridesDefaultStyle"
          Value="true" />
  <Setter Property="Template">
    <Setter.Value>
      <ControlTemplate TargetType="ListBoxItem">
        <Border x:Name="Border"
                Padding="2"
                SnapsToDevicePixels="true"
                Background="Transparent">
          <VisualStateManager.VisualStateGroups>
            <VisualStateGroup x:Name="CommonStates">
              <VisualState x:Name="Normal" />
              <VisualState x:Name="MouseOver" />
              <VisualState x:Name="Disabled" />
            </VisualStateGroup>
            <VisualStateGroup x:Name="SelectionStates">
              <VisualState x:Name="Unselected" />
              <VisualState x:Name="Selected">
                <Storyboard>
                  <ColorAnimationUsingKeyFrames Storyboard.TargetName="Border"
                                                Storyboard.TargetProperty="(Panel.Background).
                    (SolidColorBrush.Color)">
                    <EasingColorKeyFrame KeyTime="0"
                                         Value="{StaticResource SelectedBackgroundColor}" />
                  </ColorAnimationUsingKeyFrames>
                </Storyboard>
              </VisualState>
              <VisualState x:Name="SelectedUnfocused">
                <Storyboard>
                  <ColorAnimationUsingKeyFrames Storyboard.TargetName="Border"
                                                Storyboard.TargetProperty="(Panel.Background).
                    (SolidColorBrush.Color)">
                    <EasingColorKeyFrame KeyTime="0"
                                         Value="{StaticResource SelectedUnfocusedColor}" />
                  </ColorAnimationUsingKeyFrames>
                </Storyboard>
              </VisualState>
            </VisualStateGroup>
          </VisualStateManager.VisualStateGroups>
          <GridViewRowPresenter VerticalAlignment="{TemplateBinding VerticalContentAlignment}" />
        </Border>
      </ControlTemplate>
    </Setter.Value>
  </Setter>
</Style>

Negli esempi di ControlTemplate vengono utilizzate una o più delle risorse seguenti.

<!--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>

Per l'esempio completo, vedere Esempio di applicazione di stili con ControlTemplate (la pagina potrebbe essere in inglese).

Vedere anche

Riferimenti

Style

ControlTemplate

Concetti

Applicazione di stili e modelli

Personalizzazione dell'aspetto di un controllo esistente mediante la creazione di un oggetto ControlTemplate

Altre risorse

Stili e modelli di Control

Personalizzazione dei controlli

Cronologia delle modifiche

Data	Cronologia	Motivo
Aprile 2011	Aggiunta di commenti relativi all'inclusione di ItemsPresenter e ScrollViewer in ControlTemplate.	Miglioramento delle informazioni.
Agosto 2010	Aggiunta dell'esempio ControlTemplate.	Miglioramento delle informazioni.