控制模板可见性触发器 [英] control template visibility triggers

问题描述

所有我正在尝试使用以下按钮样式，只有当IsMouseOver或IsPressed才可以看到该按钮。

All I am trying to do with the button style below is have the button only be visible when either IsMouseOver or IsPressed.

写入的方式甚至不会编译，找不到雕文。在IsMoueOver？可以看到这个按钮是如何清理的？

The way it's written won't even compile, not finding "Glyph". How can I clean this up to the button is visible when IsMoueOver?

干杯，

Berryl

Cheers,
Berryl

<Style x:Key="EditCommandButtonStyle" TargetType="{x:Type Button}">
   <Setter Property="Content">
      <Setter.Value>
         <TextBlock x:Name="Glyph" Width="30" 
            FontFamily="Wingdings 3" FontSize="24" Text="a" Visibility="Hidden"/>
      </Setter.Value>
   </Setter>
   <Setter Property="Template">
      <Setter.Value>
         <ControlTemplate TargetType="{x:Type Button}">
            <Border x:Name="Border" Background="Transparent" CornerRadius="4">
               <ContentPresenter HorizontalAlignment="Center" VerticalAlignment="Center"/>
            </Border>
            <ControlTemplate.Triggers>
               <Trigger Property="IsMouseOver" Value="True">
                  <Setter TargetName="Border" Property="Background" Value="LightBlue"/>
                  <Setter TargetName="Glyph" Property="Visibility" Value="Visible"/>
               </Trigger>
               <Trigger Property="IsPressed" Value="True">
                  <Setter TargetName="Border" Property="Background" Value="Orange"/>
               </Trigger>
            </ControlTemplate.Triggers>
         </ControlTemplate>
      </Setter.Value>
   </Setter>
</Style>

推荐答案

使ContentPresenter成为命名目标，而不是TextBlock。

Make the ContentPresenter the named target instead of the TextBlock.

<Style x:Key="EditCommandButtonStyle" TargetType="{x:Type Button}">
    <Setter Property="Content">
        <Setter.Value>
            <TextBlock FontFamily="Wingdings 3" FontSize="24" Text="a" />
        </Setter.Value>
    </Setter>
    <Setter Property="Template">
        <Setter.Value>
            <ControlTemplate TargetType="{x:Type Button}">
                <Border x:Name="Border" Background="Transparent" CornerRadius="4">
                    <ContentPresenter x:Name="theContent" Visibility="Hidden"
                           HorizontalAlignment="Center" VerticalAlignment="Center"/>
                </Border>
                <ControlTemplate.Triggers>
                    <Trigger Property="IsMouseOver" Value="True">
                        <Setter TargetName="Border" Property="Background" 
                                Value="LightBlue"/>
                        <Setter TargetName="theContent" Property="Visibility" 
                                Value="Visible"/>
                    </Trigger>
                    <Trigger Property="IsPressed" Value="True">
                        <Setter TargetName="Border" Property="Background" 
                                Value="Orange"/>
                    </Trigger>
                </ControlTemplate.Triggers>
            </ControlTemplate>
        </Setter.Value>
    </Setter>
</Style>

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