你能否将GroupBox的可见性绑定到它的孩子的可见性？

Question

我有一个问题试图让GroupBox崩溃.我想要一个GroupBox,如果它的所有子节点都被折叠,它将崩溃.

我已经设法通过对属性进行多重绑定来实现这一点,如下所示.

<StackPanel>
    <GroupBox>
      <GroupBox.Visibility>
        <MultiBinding 
          Converter="{StaticResource multiBoolOrToVis}"
          ConverterParameter="{x:Static Visibility.Collapsed}"
        >
          <Binding Path="a_visible"/>
          <Binding Path="b_visible"/>
        </MultiBinding>
      </GroupBox.Visibility>
        <GroupBox.Header>
        <Label Content="GroupBox"/>
      </GroupBox.Header>
      <StackPanel>
        <Label 
          Content="A"
          Visibility="{Binding Path=a_visible, Converter={StaticResource boolToVis}}"
        />
        <Label 
          Content="B"
          Visibility="{Binding Path=b_visible, Converter={StaticResource boolToVis}}"
        />
      </StackPanel>
    </GroupBox>
    <Grid>
      <Grid.ColumnDefinitions>
        <ColumnDefinition Width="*"/>
        <ColumnDefinition Width="*"/>
      </Grid.ColumnDefinitions>
      <CheckBox 
        Content="A Visible"
        Grid.Column="0"
        Grid.Row="1"
        IsChecked="{Binding Path=a_visible, Mode=TwoWay}"
      />
      <CheckBox 
        Content="B Visible"
        Grid.Column="1"
        Grid.Row="1"
        IsChecked="{Binding Path=b_visible, Mode=TwoWay}"
      />
    </Grid>
  </StackPanel>

这个问题是我们希望能够多次执行此操作而不必担心不使用绑定.所以我的问题是有什么方法可以做到这一点,最好是一种风格.另一个要求是它必须是xaml而不是代码.

所以我理想的答案是风格,所以我可以在我的xaml中使用以下内容.

<StackPanel>
    <GroupBox Style="ChildrenVisibilityStyle">
        <GroupBox.Header>
        <Label Content="GroupBox"/>
      </GroupBox.Header>
      <StackPanel>
        <Label 
          Content="A"
          Visibility="{Binding Path=a_visible, Converter={StaticResource boolToVis}}"
        />
        <Label 
          Content="B"
          Visibility="{Binding Path=b_visible, Converter={StaticResource boolToVis}}"
        />
      </StackPanel>
    </GroupBox>
    <Grid>
      <Grid.ColumnDefinitions>
        <ColumnDefinition Width="*"/>
        <ColumnDefinition Width="*"/>
      </Grid.ColumnDefinitions>
      <CheckBox 
        Content="A Visible"
        Grid.Column="0"
        Grid.Row="1"
        IsChecked="{Binding Path=a_visible, Mode=TwoWay}"
      />
      <CheckBox 
        Content="B Visible"
        Grid.Column="1"
        Grid.Row="1"
        IsChecked="{Binding Path=b_visible, Mode=TwoWay}"
      />
    </Grid>
  </StackPanel>

我看过这些问题,他们让我认为这是不可能的; controltemplate中的绑定,stackpanel可见性,边界可见性.

对不起,如果之前已经回答过.提前感谢您的任何答案/评论.

Answer 1

当孩子们折叠起来时，你可以使用 aMultiDataTrigger来折叠GroupBox

这是一个工作示例：

 <StackPanel>
    <GroupBox>
        <GroupBox.Header>
            <Label Content="GroupBox"/>
        </GroupBox.Header>
        <StackPanel>
            <Label x:Name="lbl_a" Content="A" Visibility="{Binding IsChecked, ElementName=chk_a, Converter={StaticResource boolToVis}}"  />
            <Label x:Name="lbl_b" Content="B" Visibility="{Binding IsChecked, ElementName=chk_b, Converter={StaticResource boolToVis}}"  />
        </StackPanel>
        <GroupBox.Style>
            <Style TargetType="GroupBox">
                <Style.Triggers>
                    <MultiDataTrigger>
                        <MultiDataTrigger.Conditions>
                            <Condition Binding="{Binding Visibility, ElementName=lbl_a}" Value="Collapsed" />
                            <Condition Binding="{Binding Visibility, ElementName=lbl_b}" Value="Collapsed" />
                        </MultiDataTrigger.Conditions>
                        <MultiDataTrigger.Setters>
                            <Setter Property="GroupBox.Visibility" Value="Collapsed" />
                        </MultiDataTrigger.Setters>
                    </MultiDataTrigger>
                </Style.Triggers>
            </Style>
        </GroupBox.Style>
    </GroupBox>

    <CheckBox x:Name="chk_a" Content="A Visible" Grid.Column="0" Grid.Row="1" />
    <CheckBox x:Name="chk_b" Content="B Visible" Grid.Column="1" Grid.Row="1"  />

</StackPanel>