在DocumentViewer中禁用文本选择

Question

简单的问题.如何在WPF中禁用DocumentViewer的文本选择？这是查看器显示XPS文档然后可以通过鼠标突出显示文本的功能.突出显示的文本也可以复制,但我已经禁用了它.我只是不知道如何禁用突出显示.

谢谢!

Answer 1

我们通过重写 DocumentViewer 控件中嵌入的 ScrollViewer 的 ControlTemplate 解决了这个问题。在“Window.Resources”中插入以下样式：

<Style TargetType="{x:Type ScrollViewer}"  x:Key="CustomScrollPresenter">
    <Setter Property="Template">
        <Setter.Value>
            <ControlTemplate TargetType="{x:Type ScrollViewer}">
                <Grid Background="{TemplateBinding Panel.Background}">
                    <Grid.ColumnDefinitions>
                        <ColumnDefinition Width="*" />
                        <ColumnDefinition Width="Auto" />
                    </Grid.ColumnDefinitions>
                    <Grid.RowDefinitions>
                        <RowDefinition Height="*" />
                        <RowDefinition Height="Auto" />
                    </Grid.RowDefinitions>
                    <Rectangle Grid.Column="1" Grid.Row="1" Fill="{DynamicResource {x:Static SystemColors.ControlBrushKey}}" />
                    <ScrollContentPresenter 
                        PreviewMouseLeftButtonDown="ScrollContentPresenter_PreviewMouseLeftButtonDown"
                        Grid.Column="0" 
                        Grid.Row="0" 
                        Margin="{TemplateBinding Control.Padding}" 
                        Content="{TemplateBinding ContentControl.Content}" 
                        ContentTemplate="{TemplateBinding ContentControl.ContentTemplate}" 
                        CanContentScroll="{TemplateBinding ScrollViewer.CanContentScroll}" />
                    <ScrollBar 
                        x:Name="PART_VerticalScrollBar"
                        Grid.Column="1" 
                               Grid.Row="0" 
                               Minimum="0" 
                               Maximum="{TemplateBinding ScrollViewer.ScrollableHeight}" 
                               ViewportSize="{TemplateBinding ScrollViewer.ViewportHeight}" 
                               Value="{Binding Path=VerticalOffset, Mode=OneWay, RelativeSource={RelativeSource Mode=TemplatedParent}}" 
                               Visibility="{TemplateBinding ScrollViewer.ComputedVerticalScrollBarVisibility}" 
                               Cursor="Arrow" AutomationProperties.AutomationId="VerticalScrollBar" />
                    <ScrollBar 
                        x:Name="PART_HorizontalScrollBar"
                        Orientation="Horizontal" Grid.Column="0" Grid.Row="1" Minimum="0" 
                               Maximum="{TemplateBinding ScrollViewer.ScrollableWidth}" ViewportSize="{TemplateBinding ScrollViewer.ViewportWidth}" Value="{Binding Path=HorizontalOffset, Mode=OneWay, RelativeSource={RelativeSource Mode=TemplatedParent}}" Visibility="{TemplateBinding ScrollViewer.ComputedHorizontalScrollBarVisibility}" Cursor="Arrow" AutomationProperties.AutomationId="HorizontalScrollBar" />

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

然后在 DocumentViewer 的 ControlTemplate 中用它覆盖 ScrollViewer 的样式：

   <Style
      x:Key="MyDVStyleExtend"
      BasedOn="{StaticResource {x:Type DocumentViewer}}"
      TargetType="{x:Type DocumentViewer}">

      <Setter Property="Template">                
       <Setter.Value>

          <ControlTemplate TargetType="DocumentViewer">
                        <Border BorderThickness="2,2,2,2"
                    BorderBrush="SlateBlue" Focusable="False">
              <Grid Background="{StaticResource GridBackground}" 
                KeyboardNavigation.TabNavigation="Local">
                <Grid.ColumnDefinitions>                  
                  <ColumnDefinition Width ="*"/>                                    
                </Grid.ColumnDefinitions>                

                <ScrollViewer Style="{StaticResource CustomScrollPresenter}"  Grid.Column ="0" 
                  CanContentScroll="True"
                  HorizontalScrollBarVisibility="Auto"
                  x:Name="PART_ContentHost"
                  IsTabStop="True"/>

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

    </Style>

然后为 CustomScrollPresenter 样式中声明的“PreviewMouseLeftButtonDown="ScrollContentPresenter_PreviewMouseLeftButtonDown"”属性创建一个函数。

  private void ScrollContentPresenter_PreviewMouseLeftButtonDown(object sender, MouseButtonEventArgs e)
    {
        e.Handled = true;
    }