按钮可见性取决于两个属性(OR而不是AND)

Question

我在WPF中有一个按钮，如果鼠标在按钮所在的边界上，我想使它可见。这很简单:

                    <Button Grid.Column="1" Click="DimFilter_Click" Style="{StaticResource ImageButton}" MouseDown="Button_MouseDown"
                            Visibility="{Binding RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type Border}}, Path=IsMouseOver, Converter={StaticResource BoolToVis}}">
                        <Button.Content>
                            <Image Source="{Binding FilterActive, Converter={StaticResource FilterImageConverter}}"
                                   HorizontalAlignment="Center" VerticalAlignment="Center"/>
                        </Button.Content>
                    </Button>

我的问题是，我也想使按钮可见，如果属性"FilterActive"是真。因此，如果"FilterActive"为假，我想在上面的代码中使用MouseOver绑定，但如果"FilterActive"为真，按钮应该一直可见，忽略第一个绑定。这有可能吗?

Answer 1

您可以使用触发器而不是绑定:

<Button Grid.Column="1" 
        Click="DimFilter_Click" 
        MouseDown="Button_MouseDown">                     
    <Button.Style>
        <Style BasedOn="{StaticResource ImageButton}" TargetType="Button">
            <Setter Property="Visibility" Value="Collapsed" />
            <Style.Triggers>                              
                <DataTrigger Binding="{Binding FilterActive}" Value="True">
                    <Setter Property="Visibility" Value="Visible" />
                </DataTrigger>
                <DataTrigger Binding="{Binding RelativeSource={RelativeSource FindAncestor, AncestorType={x:Type Border}}, Path=IsMouseOver, Converter={StaticResource BoolToVis}}" Value="True">
                    <Setter Property="Visibility" Value="Visible" />
                </DataTrigger>                                  
            </Style.Triggers>
        </Style>
    </Button.Style>
    <Button.Content>
        <Image Source="{Binding FilterActive, Converter={StaticResource FilterImageConverter}}"
                    HorizontalAlignment="Center" VerticalAlignment="Center"/>
    </Button.Content>
</Button>

Answer 2

好吧，我懂了，我真笨。

<Button.Visibility>
    <MultiBinding Converter="{StaticResource ButtonVisConverter}">
          <Binding Path="FilterActive"/>
          <Binding RelativeSource="{RelativeSource FindAncestor, AncestorType={x:Type Border}}" Path="IsMouseOver"/>
     </MultiBinding>
</Button.Visibility>

转换器中的代码几乎是不言自明的