62 votes

Mettez en surbrillance toute la ligne TreeViewItem dans WPF

Si j'ai mis TreeViewItem Contexte, il souligne l'en-tête uniquement. Comment puis-je mettre en évidence l'ensemble de la ligne?

J'ai trouvé un post presque la résolution d'un problème http://social.msdn.microsoft.com/Forums/en-US/wpf/thread/b04f73e2-0b10-4d97-a6da-64df2e30c21d/

Mais il y a quelques problèmes: 1. Il ne permet pas de mettre en évidence l'ensemble de la ligne 2. L'arbre a XP sur Vista. Je doit comme il regarde de la même façon sur Vista comme il était, mais si l'utilisateur a changé le thème pour XP il faut XP. 3. Donc, beaucoup de XAML...

Toutes les idées, ce que je dois chercher?

105voto

bendewey Points 25437

Ici, nous allons, troisième fois un charme. Si vous voulez quelque chose qui ressemble à ceci.

Full Width TreeView

Celle-ci prend un peu plus de travail. Je suis sûr qu'il ya beaucoup de façons de le faire, mais cette méthode utilise un Convertisseur de Longueur et un TreeViewItem méthode d'extension pour obtenir la Profondeur. Ces deux sont étroitement couplée à la TreeViewItem visuelle de l'arbre, de sorte que si vous commencez à jouer avec les Modèles, alors vous pourriez avoir des ennuis. Encore une fois, c'est la partie importante, et ci-dessous le code complet.

<ControlTemplate TargetType="{x:Type TreeViewItem}">
  <ControlTemplate.Resources>
      <local:LeftMarginMultiplierConverter Length="19" x:Key="lengthConverter" />
  </ControlTemplate.Resources>
  <StackPanel>
        <Border Name="Bd"
          Background="{TemplateBinding Background}"
          BorderBrush="{TemplateBinding BorderBrush}"
          BorderThickness="{TemplateBinding BorderThickness}"
          Padding="{TemplateBinding Padding}">
            <Grid Margin="{Binding Converter={StaticResource lengthConverter},
                    RelativeSource={RelativeSource TemplatedParent}}">

                <Grid.ColumnDefinitions>
                    <ColumnDefinition Width="19" />
                    <ColumnDefinition />
                </Grid.ColumnDefinitions>
                <ToggleButton x:Name="Expander"
                    Style="{StaticResource ExpandCollapseToggleStyle}"
                    IsChecked="{Binding Path=IsExpanded,
                    RelativeSource={RelativeSource TemplatedParent}}"
                    ClickMode="Press"/>

                <ContentPresenter x:Name="PART_Header"
                    Grid.Column="1"
                    ContentSource="Header"
                    HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"/>
            </Grid>
      </Border>
      <ItemsPresenter x:Name="ItemsHost" />
    </StackPanel>
    <!-- Triggers -->
</ControlTemplate>

TreeViewDepth Extension

public static class TreeViewItemExtensions
{
    public static int GetDepth(this TreeViewItem item)
    {
        TreeViewItem parent;
        while ((parent = GetParent(item)) != null)
        {
            return GetDepth(parent) + 1;
        }
        return 0;
    }

    private static TreeViewItem GetParent(TreeViewItem item)
    {
        var parent = VisualTreeHelper.GetParent(item);
        while (!(parent is TreeViewItem || parent is TreeView))
        {
            parent = VisualTreeHelper.GetParent(parent);
        }
        return parent as TreeViewItem;
    }
}

LeftMarginMultiplierConverter

public class LeftMarginMultiplierConverter : IValueConverter
{
    public double Length { get; set; }

    public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
    {
        var item = value as TreeViewItem;
        if (item == null)
            return new Thickness(0);

        return new Thickness(Length * item.GetDepth(), 0, 0, 0);
    }

    public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
    {
        throw new System.NotImplementedException();
    }
}

Contrôle

<TreeView Margin="50" HorizontalContentAlignment="Stretch">
    <TreeViewItem Header="test2"/>
    <TreeViewItem Header="test2">
        <TreeViewItem Header="sub test">
            <TreeViewItem Header="sub test1-1"/>
            <TreeViewItem Header="sub test1-2"/>
        </TreeViewItem>
        <TreeViewItem Header="sub test2"/>
    </TreeViewItem>
    <TreeViewItem Header="test3"/>
</TreeView>

Plein TreeViewItem Style

<SolidColorBrush x:Key="GlyphBrush" Color="#444" />

<!--=================================================================
     TreeViewItem
  ==================================================================-->
<Style x:Key="ExpandCollapseToggleStyle" TargetType="ToggleButton">
  <Setter Property="Focusable" Value="False"/>
  <Setter Property="Template">
    <Setter.Value>
      <ControlTemplate TargetType="ToggleButton">
        <Grid
          Width="15"
          Height="13"
          Background="Transparent">
          <Path x:Name="ExpandPath"
            HorizontalAlignment="Left" 
            VerticalAlignment="Center" 
            Margin="1,1,1,1"
            Fill="{StaticResource GlyphBrush}"
            Data="M 4 0 L 8 4 L 4 8 Z"/>
        </Grid>
        <ControlTemplate.Triggers>
          <Trigger Property="IsChecked"
               Value="True">
            <Setter Property="Data"
                TargetName="ExpandPath"
                Value="M 0 4 L 8 4 L 4 8 Z"/>
          </Trigger>
        </ControlTemplate.Triggers>
      </ControlTemplate>
    </Setter.Value>
  </Setter>
</Style>
<Style x:Key="TreeViewItemFocusVisual">
  <Setter Property="Control.Template">
    <Setter.Value>
      <ControlTemplate>
        <Border>
          <Rectangle Margin="0,0,0,0"
                 StrokeThickness="5"
                 Stroke="Black"
                 StrokeDashArray="1 2"
                 Opacity="0"/>
        </Border>
      </ControlTemplate>
    </Setter.Value>
  </Setter>
</Style>


<Style x:Key="{x:Type TreeViewItem}"
     TargetType="{x:Type TreeViewItem}">
  <Setter Property="Background"
      Value="Transparent"/>
  <Setter Property="HorizontalContentAlignment"
      Value="{Binding Path=HorizontalContentAlignment,
              RelativeSource={RelativeSource AncestorType={x:Type ItemsControl}}}"/>
  <Setter Property="VerticalContentAlignment"
      Value="{Binding Path=VerticalContentAlignment,
              RelativeSource={RelativeSource AncestorType={x:Type ItemsControl}}}"/>
  <Setter Property="Padding"
      Value="1,0,0,0"/>
  <Setter Property="Foreground"
      Value="{DynamicResource {x:Static SystemColors.ControlTextBrushKey}}"/>
  <Setter Property="FocusVisualStyle"
      Value="{StaticResource TreeViewItemFocusVisual}"/>
  <Setter Property="Template">
    <Setter.Value>
      <ControlTemplate TargetType="{x:Type TreeViewItem}">
        <ControlTemplate.Resources>
            <local:LeftMarginMultiplierConverter Length="19" x:Key="lengthConverter" />
        </ControlTemplate.Resources>
        <StackPanel>
        <Border Name="Bd"
              Background="{TemplateBinding Background}"
              BorderBrush="{TemplateBinding BorderBrush}"
              BorderThickness="{TemplateBinding BorderThickness}"
              Padding="{TemplateBinding Padding}">
            <Grid Margin="{Binding Converter={StaticResource lengthConverter},
                              RelativeSource={RelativeSource TemplatedParent}}">
            <Grid.ColumnDefinitions>
                <ColumnDefinition Width="19" />
                <ColumnDefinition />
            </Grid.ColumnDefinitions>
          <ToggleButton x:Name="Expander"
                  Style="{StaticResource ExpandCollapseToggleStyle}"
                  IsChecked="{Binding Path=IsExpanded,
                              RelativeSource={RelativeSource TemplatedParent}}"
                  ClickMode="Press"/>

            <ContentPresenter x:Name="PART_Header"
            Grid.Column="1"
                      ContentSource="Header"
                      HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"/>
            </Grid>
          </Border>
          <ItemsPresenter x:Name="ItemsHost" />
        </StackPanel>
        <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>
          <MultiTrigger>
            <MultiTrigger.Conditions>
              <Condition Property="HasHeader"
                     Value="false"/>
              <Condition Property="Width"
                     Value="Auto"/>
            </MultiTrigger.Conditions>
            <Setter TargetName="PART_Header"
                Property="MinWidth"
                Value="75"/>
          </MultiTrigger>
          <MultiTrigger>
            <MultiTrigger.Conditions>
              <Condition Property="HasHeader"
                     Value="false"/>
              <Condition Property="Height"
                     Value="Auto"/>
            </MultiTrigger.Conditions>
            <Setter TargetName="PART_Header"
                Property="MinHeight"
                Value="19"/>
          </MultiTrigger>
          <Trigger Property="IsSelected"
               Value="true">
            <Setter TargetName="Bd"
                Property="Background"
                Value="{DynamicResource {x:Static SystemColors.HighlightBrushKey}}"/>
            <Setter Property="Foreground"
                Value="{DynamicResource {x:Static SystemColors.HighlightTextBrushKey}}"/>
          </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.ControlBrushKey}}"/>
            <Setter Property="Foreground"
                Value="{DynamicResource {x:Static SystemColors.ControlTextBrushKey}}"/>
          </MultiTrigger>
          <Trigger Property="IsEnabled"
               Value="false">
            <Setter Property="Foreground"
                Value="{DynamicResource {x:Static SystemColors.GrayTextBrushKey}}"/>
          </Trigger>
        </ControlTemplate.Triggers>
      </ControlTemplate>
    </Setter.Value>
  </Setter>
</Style>

7voto

bendewey Points 25437

Si vous voulez dire quelque chose comme cette capture d'écran

Full Width TreeViewItem

Mise à jour Comme indiqué dans cet exemple, la chute de l'être en retrait sur les sous-éléments

Full Width TreeViewItem

Ensuite, cela devrait vous aider. Il est aussi basé sur http://msdn.microsoft.com/en-us/library/ms788727.aspx vous pouvez modifier la TreeViewItem du Modèle à un StackPanel et définir la ItemsPanel Marge de gauche à 19. Puis, dans l'Arborescence, vous définissez la HorizontalContentAlignment="Stretch". Je suis à la fixation de la totalité de la ressource ci-dessous, mais ici, c'est la partie importante.

<ControlTemplate TargetType="{x:Type TreeViewItem}">
<StackPanel>
    <Border Name="Bd"
      Background="{TemplateBinding Background}"
      BorderBrush="{TemplateBinding BorderBrush}"
      BorderThickness="{TemplateBinding BorderThickness}"
      Padding="{TemplateBinding Padding}">
    	<Grid>
    	<Grid.ColumnDefinitions>
    		<ColumnDefinition Width="19" />
    		<ColumnDefinition />
    	</Grid.ColumnDefinitions>
    	      <ToggleButton x:Name="Expander"
    	              Style="{StaticResource ExpandCollapseToggleStyle}"
    	              IsChecked="{Binding Path=IsExpanded,
    	                          RelativeSource={RelativeSource TemplatedParent}}"
    	              ClickMode="Press"/>
    	      <ContentPresenter x:Name="PART_Header"
    				Grid.Column="1"
    	                ContentSource="Header"
    	                HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"/>
    	</Grid>
  </Border>
  <ItemsPresenter x:Name="ItemsHost" Margin="19,0,0,0" />
</StackPanel>
<!-- Triggers -->
</ControlTemplate>

Contrôle

<TreeView Margin="50" HorizontalContentAlignment="Stretch">
    <TreeViewItem Header="test2"/>
    <TreeViewItem Header="test2">
    	<TreeViewItem Header="sub test"/>
    	<TreeViewItem Header="sub test2"/>
    </TreeViewItem>
    <TreeViewItem Header="test3"/>
</TreeView>

Ressources

<SolidColorBrush x:Key="GlyphBrush" Color="#444" />

<!--=================================================================
      TreeViewItem
  ==================================================================-->
<Style x:Key="ExpandCollapseToggleStyle" TargetType="ToggleButton">
  <Setter Property="Focusable" Value="False"/>
  <Setter Property="Template">
    <Setter.Value>
      <ControlTemplate TargetType="ToggleButton">
        <Grid
          Width="15"
          Height="13"
          Background="Transparent">
          <Path x:Name="ExpandPath"
            HorizontalAlignment="Left" 
            VerticalAlignment="Center" 
            Margin="1,1,1,1"
            Fill="{StaticResource GlyphBrush}"
            Data="M 4 0 L 8 4 L 4 8 Z"/>
        </Grid>
        <ControlTemplate.Triggers>
          <Trigger Property="IsChecked"
               Value="True">
            <Setter Property="Data"
                TargetName="ExpandPath"
                Value="M 0 4 L 8 4 L 4 8 Z"/>
          </Trigger>
        </ControlTemplate.Triggers>
      </ControlTemplate>
    </Setter.Value>
  </Setter>
</Style>
<Style x:Key="TreeViewItemFocusVisual">
  <Setter Property="Control.Template">
    <Setter.Value>
      <ControlTemplate>
        <Border>
          <Rectangle Margin="0,0,0,0"
                 StrokeThickness="5"
                 Stroke="Black"
                 StrokeDashArray="1 2"
                 Opacity="0"/>
        </Border>
      </ControlTemplate>
    </Setter.Value>
  </Setter>
</Style>


<Style x:Key="{x:Type TreeViewItem}"
     TargetType="{x:Type TreeViewItem}">
  <Setter Property="Background"
      Value="Transparent"/>
  <Setter Property="HorizontalContentAlignment"
      Value="{Binding Path=HorizontalContentAlignment,
              RelativeSource={RelativeSource AncestorType={x:Type ItemsControl}}}"/>
  <Setter Property="VerticalContentAlignment"
      Value="{Binding Path=VerticalContentAlignment,
              RelativeSource={RelativeSource AncestorType={x:Type ItemsControl}}}"/>
  <Setter Property="Padding"
      Value="1,0,0,0"/>
  <Setter Property="Foreground"
      Value="{DynamicResource {x:Static SystemColors.ControlTextBrushKey}}"/>
  <Setter Property="FocusVisualStyle"
      Value="{StaticResource TreeViewItemFocusVisual}"/>
  <Setter Property="Template">
    <Setter.Value>
      <ControlTemplate TargetType="{x:Type TreeViewItem}">
        <StackPanel>
    		<Border Name="Bd"
              Background="{TemplateBinding Background}"
              BorderBrush="{TemplateBinding BorderBrush}"
              BorderThickness="{TemplateBinding BorderThickness}"
              Padding="{TemplateBinding Padding}">
    		<Grid>
    			<Grid.ColumnDefinitions>
    				<ColumnDefinition Width="19" />
    				<ColumnDefinition />
    			</Grid.ColumnDefinitions>
    	          <ToggleButton x:Name="Expander"
    	                  Style="{StaticResource ExpandCollapseToggleStyle}"
    	                  IsChecked="{Binding Path=IsExpanded,
    	                              RelativeSource={RelativeSource TemplatedParent}}"
    	                  ClickMode="Press"/>
                <ContentPresenter x:Name="PART_Header"
    						Grid.Column="1"
                          ContentSource="Header"
                          HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"/>
    		</Grid>
          </Border>
          <ItemsPresenter x:Name="ItemsHost" Margin="19,0,0,0" />
        </StackPanel>
        <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>
          <MultiTrigger>
            <MultiTrigger.Conditions>
              <Condition Property="HasHeader"
                     Value="false"/>
              <Condition Property="Width"
                     Value="Auto"/>
            </MultiTrigger.Conditions>
            <Setter TargetName="PART_Header"
                Property="MinWidth"
                Value="75"/>
          </MultiTrigger>
          <MultiTrigger>
            <MultiTrigger.Conditions>
              <Condition Property="HasHeader"
                     Value="false"/>
              <Condition Property="Height"
                     Value="Auto"/>
            </MultiTrigger.Conditions>
            <Setter TargetName="PART_Header"
                Property="MinHeight"
                Value="19"/>
          </MultiTrigger>
          <Trigger Property="IsSelected"
               Value="true">
            <Setter TargetName="Bd"
                Property="Background"
                Value="{DynamicResource {x:Static SystemColors.HighlightBrushKey}}"/>
            <Setter Property="Foreground"
                Value="{DynamicResource {x:Static SystemColors.HighlightTextBrushKey}}"/>
          </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.ControlBrushKey}}"/>
            <Setter Property="Foreground"
                Value="{DynamicResource {x:Static SystemColors.ControlTextBrushKey}}"/>
          </MultiTrigger>
          <Trigger Property="IsEnabled"
               Value="false">
            <Setter Property="Foreground"
                Value="{DynamicResource {x:Static SystemColors.GrayTextBrushKey}}"/>
          </Trigger>
        </ControlTemplate.Triggers>
      </ControlTemplate>
    </Setter.Value>
  </Setter>
</Style>

4voto

bendewey Points 25437

Si vous voulez dire quelque chose comme cette capture d'écran

LineItem Hightlighting in a TreeView

Ensuite, cela devrait vous aider. Il est basé sur http://msdn.microsoft.com/en-us/library/ms788727.aspx vous pouvez apporter quelques modifications à la TreeViewItem de la Grille de mise en page. Fondamentalement, vous retirez la troisième colonne. Puis, dans l'Arborescence, vous définissez la HorizontalContentAlignment="Stretch". Je suis à la fixation de la totalité de la ressource ci-dessous, mais ici, c'est la partie importante.

<!-- ... -->
<ControlTemplate TargetType="{x:Type TreeViewItem}">
  <Grid>
    <Grid.ColumnDefinitions>
      <ColumnDefinition MinWidth="19"
                Width="Auto"/>
      <ColumnDefinition Width="*"/>
    </Grid.ColumnDefinitions>
    <Grid.RowDefinitions>
      <RowDefinition Height="Auto"/>
      <RowDefinition/>
    </Grid.RowDefinitions>
    <!-- ... -->

Contrôle

<TreeView Margin="50" HorizontalContentAlignment="Stretch">
    <TreeViewItem Header="test2"/>
    <TreeViewItem Header="test2">
    	<TreeViewItem Header="sub test"/>
    	<TreeViewItem Header="sub test2"/>
    </TreeViewItem>
    <TreeViewItem Header="test3"/>
</TreeView>

Ressources

<SolidColorBrush x:Key="GlyphBrush" Color="#444" />

<!--=================================================================
   TreeViewItem
==================================================================-->
<Style x:Key="ExpandCollapseToggleStyle" TargetType="ToggleButton">
  <Setter Property="Focusable" Value="False"/>
  <Setter Property="Template">
    <Setter.Value>
      <ControlTemplate TargetType="ToggleButton">
        <Grid
          Width="15"
          Height="13"
          Background="Transparent">
          <Path x:Name="ExpandPath"
            HorizontalAlignment="Left" 
            VerticalAlignment="Center" 
            Margin="1,1,1,1"
            Fill="{StaticResource GlyphBrush}"
            Data="M 4 0 L 8 4 L 4 8 Z"/>
        </Grid>
        <ControlTemplate.Triggers>
          <Trigger Property="IsChecked"
               Value="True">
            <Setter Property="Data"
                TargetName="ExpandPath"
                Value="M 0 4 L 8 4 L 4 8 Z"/>
          </Trigger>
        </ControlTemplate.Triggers>
      </ControlTemplate>
    </Setter.Value>
  </Setter>
</Style>
<Style x:Key="TreeViewItemFocusVisual">
  <Setter Property="Control.Template">
    <Setter.Value>
      <ControlTemplate>
        <Border>
          <Rectangle Margin="0,0,0,0"
                 StrokeThickness="5"
                 Stroke="Black"
                 StrokeDashArray="1 2"
                 Opacity="0"/>
        </Border>
      </ControlTemplate>
    </Setter.Value>
  </Setter>
</Style>


<Style x:Key="{x:Type TreeViewItem}"
     TargetType="{x:Type TreeViewItem}">
  <Setter Property="Background"
      Value="Transparent"/>
  <Setter Property="HorizontalContentAlignment"
      Value="{Binding Path=HorizontalContentAlignment,
              RelativeSource={RelativeSource AncestorType={x:Type ItemsControl}}}"/>
  <Setter Property="VerticalContentAlignment"
      Value="{Binding Path=VerticalContentAlignment,
              RelativeSource={RelativeSource AncestorType={x:Type ItemsControl}}}"/>
  <Setter Property="Padding"
      Value="1,0,0,0"/>
  <Setter Property="Foreground"
      Value="{DynamicResource {x:Static SystemColors.ControlTextBrushKey}}"/>
  <Setter Property="FocusVisualStyle"
      Value="{StaticResource TreeViewItemFocusVisual}"/>
  <Setter Property="Template">
    <Setter.Value>
      <ControlTemplate TargetType="{x:Type TreeViewItem}">
        <Grid>
          <Grid.ColumnDefinitions>
            <ColumnDefinition MinWidth="19"
                      Width="Auto"/>
            <ColumnDefinition Width="*"/>
          </Grid.ColumnDefinitions>
          <Grid.RowDefinitions>
            <RowDefinition Height="Auto"/>
            <RowDefinition/>
          </Grid.RowDefinitions>
          <ToggleButton x:Name="Expander"
                  Style="{StaticResource ExpandCollapseToggleStyle}"
                  IsChecked="{Binding Path=IsExpanded,
                              RelativeSource={RelativeSource TemplatedParent}}"
                  ClickMode="Press"/>
          <Border Name="Bd"
              Grid.Column="1"
              Background="{TemplateBinding Background}"
              BorderBrush="{TemplateBinding BorderBrush}"
              BorderThickness="{TemplateBinding BorderThickness}"
              Padding="{TemplateBinding Padding}">
            <ContentPresenter x:Name="PART_Header"
                      ContentSource="Header"
                      HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"/>
          </Border>
          <ItemsPresenter x:Name="ItemsHost"
                  Grid.Row="1"
                  Grid.Column="1"/>
        </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>
          <MultiTrigger>
            <MultiTrigger.Conditions>
              <Condition Property="HasHeader" Value="false"/>
              <Condition Property="Width" Value="Auto"/>
            </MultiTrigger.Conditions>
            <Setter TargetName="PART_Header" Property="MinWidth" Value="75"/>
          </MultiTrigger>
          <MultiTrigger>
            <MultiTrigger.Conditions>
              <Condition Property="HasHeader" Value="false"/>
              <Condition Property="Height" Value="Auto"/>
            </MultiTrigger.Conditions>
            <Setter TargetName="PART_Header" Property="MinHeight" Value="19"/>
          </MultiTrigger>
          <Trigger Property="IsSelected" Value="true">
            <Setter TargetName="Bd" Property="Background" Value="{DynamicResource {x:Static SystemColors.HighlightBrushKey}}"/>
            <Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.HighlightTextBrushKey}}"/>
          </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.ControlBrushKey}}"/>
            <Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.ControlTextBrushKey}}"/>
          </MultiTrigger>
          <Trigger Property="IsEnabled" Value="false">
            <Setter Property="Foreground" Value="{DynamicResource {x:Static SystemColors.GrayTextBrushKey}}"/>
          </Trigger>
        </ControlTemplate.Triggers>
      </ControlTemplate>
    </Setter.Value>
  </Setter>
</Style>

4voto

Reza Sanaie Points 2930

C'est de loin la solution la plus simple. Créez simplement un rectangle, appelez-le Hb et définissez sa marge à -100 pixels et non visible. Ne le définissez sur Visible que lorsque vous l'avez sélectionné ou que vous passez la souris dessus. C'est un hack, mais vous pouvez utiliser jusqu'à 5 niveaux de TreeViewItems imbriqués (100> 19 * 5)

      <ControlTemplate TargetType="{x:Type TreeViewItem}">
  <Grid>
   <Grid.ColumnDefinitions>
    <ColumnDefinition MinWidth="19" Width="Auto"/>
    <ColumnDefinition Width="*"/>
   </Grid.ColumnDefinitions>
   <Grid.RowDefinitions>
    <RowDefinition Height="Auto"/>
    <RowDefinition/>
   </Grid.RowDefinitions>
                        <ToggleButton x:Name="Expander" Style="{StaticResource ExpandCollapseToggleStyle}" IsChecked="{Binding IsExpanded, RelativeSource={RelativeSource TemplatedParent}}" ClickMode="Press" VerticalAlignment="Top" Panel.ZIndex="1"/>
   <Rectangle x:Name="Hb" Width="Auto" Height="Auto" Grid.ColumnSpan="2" Margin="-100,0,0,0" Panel.ZIndex="-1" Visibility="Hidden" />
                        <Border x:Name="Bd" SnapsToDevicePixels="true" BorderThickness="{TemplateBinding BorderThickness}" Padding="{TemplateBinding Padding}" Grid.Column="1" Panel.ZIndex="0">
    <ContentPresenter x:Name="PART_Header" SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" ContentSource="Header" HorizontalAlignment="Stretch"/>
   </Border>
   <ItemsPresenter x:Name="ItemsHost" Grid.Column="0" Grid.Row="1" Grid.ColumnSpan="2" Margin="19,0,0,0"/>
  </Grid>
 

1voto

theseven7 Points 11

La source du problème lorsque TreeView avec ItemsSource est, référé à partir du texte du lien , j'ai modifié certains codes de la classe TreeViewItemExtensions:

 public static class TreeViewItemExtensions
{
    public static int GetDepth(this TreeViewItem item)
    {
        while (GetSelectedTreeViewItemParent(item) != null)
        {
            var parent = GetSelectedTreeViewItemParent(item);
            if (parent != null)
                return parent.GetDepth() + 1;

            item = parent;
        }
        return 0;
 }

 public static TreeViewItem GetSelectedTreeViewItemParent(this TreeViewItem item)
 {
        DependencyObject parent = VisualTreeHelper.GetParent(item);
        while (!(parent is TreeViewItem || parent is TreeView))
        {
            parent = VisualTreeHelper.GetParent(parent);
        }

        return parent as TreeViewItem;
  }
}
 

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