c# - 将按钮设置为选中状态并更改样式

Question

这是我实际的按钮样式:

<Style x:Key="CategoryButtonStyle" TargetType="{x:Type Button}">
    <Setter Property="HorizontalContentAlignment" Value="Center"/>
    <Setter Property="VerticalContentAlignment" Value="Center"/>
    <Setter Property="Padding" Value="1"/>
    <Setter Property="Template">
        <Setter.Value>
            <ControlTemplate TargetType="{x:Type Button}">
                <Grid x:Name="grid">
                    <Path x:Name="TabPath" StrokeThickness="2"
                          Margin="{Binding ElementName=buttonContent, Converter={x:Static c:ContentToMarginConverter.Value}}"
                          Stroke="{StaticResource BorderBrush1}"
                          Fill="{StaticResource TabItemPathBrush}">
                        <Path.Data>
                            <PathGeometry>
                                <PathFigure IsClosed="False" StartPoint="1,0" 
                                            Segments="{Binding ElementName=buttonContent, Converter={x:Static c:ContentToPathConverter.Value}}">
                                </PathFigure>
                            </PathGeometry>
                        </Path.Data>
                        <Path.LayoutTransform>
                            <!-- For some reason  -->
                            <ScaleTransform ScaleY="-1"/>
                        </Path.LayoutTransform>
                    </Path>
                    <Rectangle x:Name="TabItemTopBorder" Height="2" Visibility="Visible"
                               VerticalAlignment="Bottom" Fill="{StaticResource BorderBrush1}"
                               Margin="{Binding ElementName=TabPath, Path=Margin}" />
                    <ContentPresenter x:Name="buttonContent" Margin="10,2,10,2" VerticalAlignment="Center"
                                      TextElement.Foreground="{StaticResource ForegroundBrush}"/>
                </Grid>
                <ControlTemplate.Triggers>
                    <Trigger Property="IsPressed" Value="True">
                        <Setter Property="Fill" TargetName="TabPath">
                            <Setter.Value>
                                <SolidColorBrush Color="#FFe4f6fa"/>
                            </Setter.Value>
                        </Setter>
                        <Setter Property="BitmapEffect">
                            <Setter.Value>
                                <DropShadowBitmapEffect Direction="302" Opacity="0.4" 
                                                        ShadowDepth="2" Softness="0.5"/>
                            </Setter.Value>
                        </Setter>
                    </Trigger>
                    <Trigger Property="IsEnabled" Value="False">
                        <Setter Property="Opacity" TargetName="grid" Value="0.25"/>
                    </Trigger>
                </ControlTemplate.Triggers>
            </ControlTemplate>
        </Setter.Value>
    </Setter>
</Style>

我需要添加代码，我可以将按钮设置为选定状态，就像按下按钮时一样。我正在考虑使用 VisualStateManager 但我不确定这是否是好方法以及我该怎么做。我从这样的事情开始:

<VisualStateManager.VisualStateGroups>
     <VisualState x:Name="Normal" />
     <VisualState x:Name="Selected">
        <Storyboard>
            <ObjectAnimationUsingKeyFrames Storyboard.TargetName="TabPath" 
                                   Storyboard.TargetProperty="Fill">
                                    <DiscreteObjectKeyFrame KeyTime="0" Value="#FFe4f6fa" />
             </ObjectAnimationUsingKeyFrames>
         </Storyboard>
     </VisualState>
</VisualStateManager.VisualStateGroups>

但它不起作用。我只是不知道在 Storyboard 中使用什么。

编辑 - 几乎可以正常工作:

<VisualState x:Name="Selected">
     <Storyboard>
        <ColorAnimation Storyboard.TargetName="TabPath" Storyboard.TargetProperty="Fill.(LinearGradientBrush.GradientStops)[0].(GradientStop.Color)" To="#FFe4f6fa" Duration="0:0:0" />
        <ColorAnimation Storyboard.TargetName="TabPath" Storyboard.TargetProperty="Fill.(LinearGradientBrush.GradientStops)[1].(GradientStop.Color)" To="#FFa9cde7" Duration="0:0:0" />               
      </Storyboard>
 </VisualState>

忘记添加我的画笔:

<LinearGradientBrush x:Key="TabItemSelectedPathBrush" StartPoint="0,0" EndPoint="0,1">
    <GradientStop Color="#FFe4f6fa" Offset="0"/>
    <GradientStop Color="#FFa9cde7" Offset="1"/>
</LinearGradientBrush>

<LinearGradientBrush x:Key="TabItemPathBrush" StartPoint="0,0" EndPoint="0,1">
    <GradientStop Color="#FFa9cde7" Offset="0"/>
    <GradientStop Color="#FF3164a5" Offset="1"/>
</LinearGradientBrush>

Answer 1

使用使用相同样式和模板的 ToggleButton。

在您的样式(您原始问题中的样式)中，将样式和控件模板上的 TargetType 更改为 ButtonBase。

在控件模板触发器中添加这个触发器:

 <Trigger Property="ToggleButton.IsChecked" Value="True">
     <Setter Property="Fill" TargetName="TabPath">
         <Setter.Value>
             <SolidColorBrush Color="#FFe4f6fa"/>
         </Setter.Value>
     </Setter>
     <Setter Property="BitmapEffect">
         <Setter.Value>
             <DropShadowBitmapEffect Direction="302" Opacity="0.4" ShadowDepth="2" Softness="0.5"/>
         </Setter.Value>
     </Setter>
 </Trigger>

现在您可以将此样式用于按钮、切换按钮、单选按钮和复选框。