wpf - 是否可以像在 WPF 中扩展样式一样扩展 ControlTemplate？

Question

所以问题是我有一个主 ControlTemplate，它定义了我们正在设计的新按钮外观的最基本的东西。但是我想为这个按钮做 3 个其他的控制模板，这样我们就可以在其中设置不同的颜色；但我不想复制粘贴主 ControlTemplate 并在那里更改颜色，而是想从中“继承”(例如使用 Style 中的 BasedOn 属性)并更改继承的 ControlTemplate 中的颜色。

这可能吗？

谢谢!

Answer 1

找到了解决办法。您不扩展 ControlTemplates，而是定义您想要的所有基本行为，然后让样式或控件本身修改它。以下面的例子为例。 ControlTemplate 为我的矩形设置 OpacityMask 和圆角，样式设置每个按钮的背景颜色(在 TemplateBinding 的帮助下)，这是我的解决方案:

    <Window.Resources>
        <ControlTemplate x:Key="BaseMainButtonTemplate" TargetType="{x:Type Button}">
            <Grid TextBlock.Foreground="White" TextBlock.FontFamily="Calibri">
                <Rectangle Stroke="#FFE8E6E6" x:Name="rectangle" RadiusX="14.5" RadiusY="14.5" Fill="{TemplateBinding Property=Background}"> <!-- This TemplateBinding takes the color set by the style and applies it to the rectangle. Doing it this way, allows the style to modify the background color -->
                    <Rectangle.OpacityMask>
                        <LinearGradientBrush EndPoint="0,1" SpreadMethod="Reflect">
                            <GradientStop Offset="0" Color="Transparent"></GradientStop>
                            <GradientStop Offset="1" Color="Gray"></GradientStop>
                        </LinearGradientBrush>
                    </Rectangle.OpacityMask>
                </Rectangle>
                <ContentPresenter SnapsToDevicePixels="{TemplateBinding SnapsToDevicePixels}" HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}" VerticalAlignment="{TemplateBinding VerticalContentAlignment}" RecognizesAccessKey="True"/>
            </Grid>
            <ControlTemplate.Triggers>
                <!-- OpacityMask when it's Focused, Defaulted and Mouse is over -->
                <Trigger Property="IsFocused" Value="True"/>
                <Trigger Property="IsMouseOver" Value="True">
                    <Setter Property="OpacityMask" TargetName="rectangle">
                        <Setter.Value>
                            <LinearGradientBrush EndPoint="0,1" SpreadMethod="Repeat">
                                <GradientStop Offset="1" Color="Transparent"></GradientStop>
                                <GradientStop Offset="0" Color="Gray"></GradientStop>
                            </LinearGradientBrush>
                        </Setter.Value>
                    </Setter>
                </Trigger>
                <!-- OpacityMask when it's pressed -->
                <Trigger Property="IsPressed" Value="True">
                    <Setter Property="Stroke" TargetName="rectangle">
                        <Setter.Value>
                            <LinearGradientBrush EndPoint="0.5,1" StartPoint="0.5,0">
                                <GradientStop Color="#FF223472" Offset="0"/>
                                <GradientStop Color="#FFF2F0F0" Offset="0.911"/>
                            </LinearGradientBrush>
                        </Setter.Value>
                    </Setter>
                    <Setter Property="StrokeThickness" TargetName="rectangle" Value="3"/>
                </Trigger>
            </ControlTemplate.Triggers>
        </ControlTemplate>
        <Style x:Key="BlueButtonStyle" TargetType="{x:Type Button}">
            <Setter Property="Background" Value="Blue" />
            <Setter Property="Template" Value="{StaticResource BaseMainButtonTemplate}">
            </Setter>
        </Style>
        <Style x:Key="RedButtonStyle" TargetType="{x:Type Button}">
            <Setter Property="Background" Value="Red" />
            <Setter Property="Template" Value="{StaticResource BaseMainButtonTemplate}">
            </Setter>
        </Style>
        <Style x:Key="GreenButtonStyle" TargetType="{x:Type Button}">
            <Setter Property="Background" Value="Green" />
            <Setter Property="Template" Value="{StaticResource BaseMainButtonTemplate}">
            </Setter>
        </Style>
    </Window.Resources>
    <Grid>
        <Grid.RowDefinitions>
            <RowDefinition Height="Auto" />
        </Grid.RowDefinitions>
        <StackPanel>
            <Button Style="{StaticResource BlueButtonStyle}" Height="30" Content="Test">
            </Button>
            <Button Style="{StaticResource RedButtonStyle}" Height="30" Content="Test">
            </Button>
            <Button Style="{StaticResource GreenButtonStyle}" Height="30" Content="Test">
            </Button>
        </StackPanel>
    </Grid>