Question

所以问题是我有一个主要的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，所以我们可以设置不同的颜色;但我不想复制粘贴主ControlTemplate并更改那里的颜色，而是我想从那里“继承”（比如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

找到解决方案。您不扩展ControlTemplates，而是定义所需的所有基本行为，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，Styles设置每个按钮的背景颜色（借助TemplateBinding），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>

Answer 2

或者，您可以定义一个＆＃34; DynamicResource＆＃34;引用控制模板中的任何依赖项属性，并在存在可用资源的情况下解决它的值。例如，您可以设置Background =＆＃34; {DynamicResource SomeBrushColorVariable}＆＃34; 然后，SomeBrushColorVariable可以更改给定的不同ResourceDictionaries，这些ResourceDictionaries合并到App.xaml文件中，甚至由用户根据用户首选项显示设置或颜色方案设置。

是否可以像在WPF中扩展Style一样扩展ControlTemplate？

2 个答案: