收录日期:2020/10/23 10:48:50 时间:2010-09-07 03:30:05 标签:c#,wpf,xaml,tabcontrol,itemtemplate

I have a scrolling TabControl, using a ScrollViewer and StackPanel (with the StackPanel set as IsItemsHost="true"). To begin with, I am working from a solution originally outlined here - Creating Scrolling Tabs Using WPF's TabControl . At the moment it has broken links (Edit: I have tracked down one instance of his code in a forum here - How to prevent TabControl from doing multi rows?), so here is the xaml for the TabControl (does not require any further code):

<TabControl x:Name="TabControl2" Height="Auto" TabStripPlacement="Bottom" VerticalAlignment="Bottom" Template="{DynamicResource TabControlControlTemplate1}" IsSynchronizedWithCurrentItem="True">
  <TabControl.Resources>
    <Style x:Key="TabScrollerRepeatButtonStyle" TargetType="{x:Type RepeatButton}">
      <Setter Property="Template">
        <Setter.Value>
          <ControlTemplate>
            <Border Background="{TemplateBinding Background}" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="1" Margin="1,0">
              <ContentPresenter HorizontalAlignment="Center" VerticalAlignment="Center" Content="{TemplateBinding ContentControl.Content}"/>
            </Border>
          </ControlTemplate>
        </Setter.Value>
      </Setter>
    </Style>

    <ControlTemplate x:Key="TabControlControlTemplate1" TargetType="{x:Type TabControl}">
      <Grid x:Name="Grid" KeyboardNavigation.TabNavigation="Local">
        <Grid.ColumnDefinitions>
          <ColumnDefinition x:Name="ColumnDefinition0"/>
          <ColumnDefinition x:Name="ColumnDefinition1" Width="0"/>
        </Grid.ColumnDefinitions>
        <Grid.RowDefinitions>
          <RowDefinition x:Name="RowDefinition0" Height="Auto"/>
          <RowDefinition x:Name="RowDefinition1" Height="*"/>
        </Grid.RowDefinitions>
        <Border Grid.Row="1" Grid.Column="0" x:Name="ContentPanel" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="0,0,1,1" KeyboardNavigation.TabIndex="2" KeyboardNavigation.TabNavigation="Local" KeyboardNavigation.DirectionalNavigation="Contained">
          <Border x:Name="Border" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}">
            <Border Background="{TemplateBinding Background}" x:Name="Border1">
              <ContentPresenter DataContext="{x:Null}" Margin="{TemplateBinding Padding}" x:Name="PART_SelectedContentHost" Content="{TemplateBinding SelectedContent}" ContentTemplate="{TemplateBinding SelectedContentTemplate}" ContentTemplateSelector="{TemplateBinding SelectedContentTemplateSelector}" ContentSource="SelectedContent"/>
            </Border>
          </Border>
        </Border>
        <ScrollViewer x:Name="HeaderPanel" Grid.Row="0" Grid.Column="0" HorizontalAlignment="Stretch" VerticalAlignment="Stretch" Margin="0,0,0,0" HorizontalScrollBarVisibility="Auto" VerticalScrollBarVisibility="Disabled">
          <ScrollViewer.Style>
            <Style TargetType="{x:Type ScrollViewer}">
              <Setter Property="Template">
                <Setter.Value>
                  <ControlTemplate>
                    <Grid Margin="0,0,0,0" Grid.Row="0" Grid.Column="0" x:Name="HeaderPanel">
                      <Grid.ColumnDefinitions>
                        <ColumnDefinition Width="20"/>
                        <ColumnDefinition Width="20"/>
                        <ColumnDefinition Width="*"/>
                        <ColumnDefinition Width="20"/>
                      </Grid.ColumnDefinitions>
                      <Grid.RowDefinitions>
                        <RowDefinition Height="Auto"/>
                      </Grid.RowDefinitions>
                      <RepeatButton Grid.Column="1" Content="<" Command="ScrollBar.LineLeftCommand" Style="{DynamicResource TabScrollerRepeatButtonStyle}" Visibility="{Binding Path=ComputedHorizontalScrollBarVisibility, Mode=OneWay, RelativeSource={RelativeSource TemplatedParent}}"/>
                      <ScrollContentPresenter Grid.Column="2" Content="{TemplateBinding ScrollViewer.Content}" />
                      <RepeatButton Grid.Column="3" Content=">" Command="ScrollBar.LineRightCommand" Style="{DynamicResource TabScrollerRepeatButtonStyle}" Visibility="{Binding Path=ComputedHorizontalScrollBarVisibility, Mode=OneWay, RelativeSource={RelativeSource TemplatedParent}}"/>
                    </Grid>
                  </ControlTemplate>
                </Setter.Value>
              </Setter>
            </Style>
          </ScrollViewer.Style>
          <StackPanel IsItemsHost="true" Orientation="Horizontal" Background="{x:Null}" KeyboardNavigation.TabIndex="1"/>
        </ScrollViewer>
      </Grid>
    </ControlTemplate>
  </TabControl.Resources>
  <TabItem x:Name="TabItem1" Header="TabItem1"/>
  <TabItem x:Name="TabItem2" Header="TabItem2"/>
</TabControl>

How might I adjust the appearance of each TabItem? For instance, I would like to place a TextBox and TextBlock inside each TabItem, with the help of a StackPanel, so that I can have renameable tabs (collapsing one or the other as appropriate). I might also want to add a close button on each tab. Ordinarily, I would use something like the following:

                <TabControl.ItemTemplate>
                    <DataTemplate>
                        <StackPanel Name="panel" Orientation="Horizontal">
                            <TextBox   Name="editHeader" Text="{Binding Header}" MaxWidth="250"/>
                            <TextBlock Name="textHeader" Text="{Binding Header}" />
                        </StackPanel>
                    </DataTemplate>
                </TabControl.ItemTemplate>

.. but this is having no effect at all. Any ideas would be appreciated. Thanks.

Edit: I am still trying to figure this out. Is it possible that the solution could involve ContentPresenter and/or SelectedContentTemplate?

Edit 2: (this doesn't add value to my question) I really, really wish WPF included something of this sort out of the box. I am baffled by TabControl's default behavior, and by the fact that there is no scrollable TabControl (nor simple solution for attaining one) after some years.

Hey guesser. I've done something similar, I based mine off of this series though

http://www.blogs.intuidev.com/post/2010/post/2010/01/25/TabControlStyling_PartOne.aspx

The method used is to simply style the tabitems template. eg:

<TabControl.Resources>
    <Style TargetType="{x:Type TabItem}">
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="{x:Type TabItem}">
                <!-- your custom template goes here -->

                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>
</TabControl.Resources>

Unforunately this method means you will have to completely redefine the way the tab items look and behave. But the provided link gives good examples on how achieve this.

Hope it helps.

Just a thought,

have you tried just adding the text block to the TabItem.Header? If you do this instead of a template it might work. Has for me in the past

I think I've got it (though still crossing fingers a bit -- I haven't yet dealt with Visibility of the TextBlock vs TextBox for renaming).

It is similar to Val's solution in that I'm working in TabControl.Resources on its TabItem, but the Property concerned is HeaderTemplate and I just override the ContentPresenter in a DataTemplate. (measures to avoid replacing\destroying a lot of good behavior that comes for free with the TabControl)

<TabControl.Resources>
    <Style TargetType="{x:Type TabItem}">
        <Setter Property="HeaderTemplate">
            <Setter.Value>
                <DataTemplate>
                    <ContentPresenter>
                        <ContentPresenter.Content>
                            <StackPanel Orientation="Horizontal">
                                <TextBlock Text="{TemplateBinding Content}"/>
                                <TextBox Text="{TemplateBinding Content}"/>
                            </StackPanel>
                        </ContentPresenter.Content>
                    </ContentPresenter>
                </DataTemplate>
            </Setter.Value>
        </Setter>
    </Style>
</TabControl.Resources>

I'm somewhat of a WPF newb, so this is basically a result of persistent experimentation with what I could find Googling. For those interested, this link (on StackOverflow) helped me most in the end - WPF TabItem Header Styling