ControlTemplate

ControlTemplate：外观定制

<Window.Resources>
    <ControlTemplate x:Key="CheckBoxControlTemplate" TargetType="CheckBox">
        <StackPanel>
            <Rectangle Name="breakRectangle" Stroke="Red" StrokeThickness="2" Width="20" Height="20">
                <Rectangle.Fill>
                    <!--默认Rectangle填充色为White-->
                    <SolidColorBrush Color="White"></SolidColorBrush>
                </Rectangle.Fill>
            </Rectangle>
            <!--ContentPresenter 保留原控件属性-->
            <ContentPresenter Margin="{TemplateBinding Padding}"></ContentPresenter>
        </StackPanel>
    </ControlTemplate>
</Window.Resources>
<Grid>
    <Grid.RowDefinitions>
        <RowDefinition Height="*"></RowDefinition>
        <RowDefinition Height="*"></RowDefinition>
        <RowDefinition Height="*"></RowDefinition>
    </Grid.RowDefinitions>
    <CheckBox Content="我是普通CheckBox"></CheckBox>
    <CheckBox Grid.Row="1" Template="{StaticResource CheckBoxControlTemplate}" Content="我是模板CheckBox"></CheckBox>
    <CheckBox Grid.Row="2" Template="{StaticResource CheckBoxControlTemplate}" Content="我是模板CheckBox，我跟上一个模板的区别在于Padding" Padding="15"></CheckBox>
</Grid>

Tips

<ContentPresenter Margin="{TemplateBinding Padding}"/>

ContentPresenter 保留原控件属性
TemplateBinding Padding，即绑定每个CheckBox自己的Margin，更灵活

效果

1
此时，点击Rectangle是没有效果的

ControlTemplate中使用触发器

<ControlTemplate.Triggers>
    <Trigger Property="IsChecked" Value="True">
        <Setter TargetName="breakRectangle" Property="Fill" Value="Coral"></Setter>
    </Trigger>
</ControlTemplate.Triggers>

Setter可以选择TargetName，即一个控件的触发器可以修改另一个控件的属性

效果

2

使用Brush

Brush一类画笔，需定义为对象才能使用
可以使用颜色、图片等等

<Window.Resources>
    <ControlTemplate x:Key="CheckBoxControlTemplate" TargetType="CheckBox">
        <ControlTemplate.Resources>
            <!--颜色-->
            <SolidColorBrush x:Key="ColorBrush" Color="Pink"></SolidColorBrush>
            <!--图片-->
            <ImageBrush x:Key="ImageBrush" ImageSource="Images/cat.jpg"></ImageBrush>
        </ControlTemplate.Resources>
        <StackPanel>
            <Rectangle Name="breakRectangle" Stroke="OrangeRed" StrokeThickness="2" Width="100" Height="100">
                <Rectangle.Fill>
                    <!--默认Rectangle填充色为White-->
                    <SolidColorBrush Color="White"></SolidColorBrush>
                </Rectangle.Fill>
            </Rectangle>
            <!--ContentPresenter 保留原控件属性-->
            <ContentPresenter Margin="{TemplateBinding Padding}"></ContentPresenter>
        </StackPanel>
        <ControlTemplate.Triggers>
            <Trigger Property="IsChecked" Value="True">
                <Setter TargetName="breakRectangle" Property="Fill" Value="{StaticResource ImageBrush}"></Setter>
            </Trigger>
            <Trigger Property="IsChecked" Value="False">
                <Setter TargetName="breakRectangle" Property="Fill" Value="{StaticResource ColorBrush}"></Setter>
            </Trigger>
        </ControlTemplate.Triggers>
    </ControlTemplate>
</Window.Resources>
<Grid>
    <Grid.RowDefinitions>
        <RowDefinition Height="0.5*"></RowDefinition>
        <RowDefinition Height="0.5*"></RowDefinition>
        <RowDefinition Height="*"></RowDefinition>
    </Grid.RowDefinitions>
    <Label Grid.Row="0" Content="没有选中时，CheckBox填充色为Pink"></Label>
    <Label Grid.Row="1" Content="选中时，CheckBox填充为猫猫的图片"></Label>
    <CheckBox Grid.Row="2" Template="{StaticResource CheckBoxControlTemplate}" Content="我是模板CheckBox"></CheckBox>
</Grid>

效果

1
2

可以对比在Style中嵌套Template的写法

https://github.com/zLulus/NotePractice/tree/dev3/WPF/WpfDemo/Template/StyleUseTemplate

其他例子

<Window.Resources>
    <ControlTemplate x:Key="CheckBoxControlTemplate" TargetType="{x:Type CheckBox}">
        <Grid>
            <TextBlock x:Name="textBlock1" HorizontalAlignment="Left" Margin="116,39,0,0" TextWrapping="Wrap" Text="TextBlock" VerticalAlignment="Top"/>
            <ContentPresenter/>
        </Grid>
        <ControlTemplate.Triggers>
            <Trigger Property="IsChecked" Value="True">
                <Setter TargetName="textBlock1" Property="Text" Value="CheckBox is checked."></Setter>
            </Trigger>
            <Trigger Property="IsChecked" Value="False">
                <Setter TargetName="textBlock1" Property="Text" Value="CheckBox is not checked."></Setter>
            </Trigger>
        </ControlTemplate.Triggers>
    </ControlTemplate>
</Window.Resources>
<Grid>
    <CheckBox Template="{StaticResource CheckBoxControlTemplate}" x:Name="checkBox1" Content="CheckBox" HorizontalAlignment="Left" Margin="137,59,0,0" VerticalAlignment="Top"></CheckBox>
</Grid>

对非内置属性的修改，用模板
用style识别不了textBlock1
直接写CheckBox 的Triggers识别不了IsChecked

示例代码

https://github.com/zLulus/NotePractice/tree/dev3/WPF/WpfDemo/Template/ControlTemplate