c# - WPF c#复选框可点击区域修改-BATCH

Question

我有大约 3000 个复选框实例，它们的样式可以单击整行，复选框的状态会发生变化。

您如何修改复选框，以便只有该框可以点击。我进行了大量搜索，但没有得出任何结论。

谢谢

Answer 1

您必须做的就是检查单击了哪个元素。

在第一个解决方案中，您应该检查 OriginalSource 是否是BulletChrome，如果是，您应该允许 CheckBox 通过设置更改状态 e.Handled = false;：如果您不允许更改 CheckBox 状态，则应设置e.Handled为 true。

在第二个解决方案中，您应该检查 OriginalSource 是否为BorderorPath并确保单击了适当的元素，我们应该检查名称。

您可以使用PreviewMouseLeftButtonDown事件来确定 OriginalSource。

XAML：

<CheckBox Content="test" PreviewMouseLeftButtonDown="CheckBox_PreviewMouseLeftButtonDown"/>

代码隐藏：

private void CheckBox_PreviewMouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
    if (e.OriginalSource is BulletChrome)
        e.Handled = false;
    else
        e.Handled = true;
}

或者，您可以创建自己的 CheckBox ControlTemplate（msdn 示例）。

您应该检查PreviewMouseLeftButtonDown事件 OriginalSource 并允许或拒绝更改 CheckBox 状态。

示例PreviewMouseLeftButtonDown：

<Window.Resources>
    <Style x:Key="CheckBoxFocusVisual">
        <Setter Property="Control.Template">
            <Setter.Value>
                <ControlTemplate>
                    <Border>
                        <Rectangle 
        Margin="15,0,0,0"
        StrokeThickness="1"
        Stroke="#60000000"
        StrokeDashArray="1 2"/>
                    </Border>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>
    <LinearGradientBrush x:Key="NormalBrush" StartPoint="0,0" EndPoint="0,1">
        <GradientBrush.GradientStops>
            <GradientStopCollection>
                <GradientStop Color="#FFF" Offset="0.0"/>
                <GradientStop Color="#CCC" Offset="1.0"/>
            </GradientStopCollection>
        </GradientBrush.GradientStops>
    </LinearGradientBrush>
    <LinearGradientBrush x:Key="HorizontalNormalBrush" StartPoint="0,0" EndPoint="1,0">
        <GradientBrush.GradientStops>
            <GradientStopCollection>
                <GradientStop Color="#FFF" Offset="0.0"/>
                <GradientStop Color="#CCC" Offset="1.0"/>
            </GradientStopCollection>
        </GradientBrush.GradientStops>
    </LinearGradientBrush>
    <LinearGradientBrush x:Key="LightBrush" StartPoint="0,0" EndPoint="0,1">
        <GradientBrush.GradientStops>
            <GradientStopCollection>
                <GradientStop Color="#FFF" Offset="0.0"/>
                <GradientStop Color="#EEE" Offset="1.0"/>
            </GradientStopCollection>
        </GradientBrush.GradientStops>
    </LinearGradientBrush>
    <LinearGradientBrush x:Key="HorizontalLightBrush" StartPoint="0,0" EndPoint="1,0">
        <GradientBrush.GradientStops>
            <GradientStopCollection>
                <GradientStop Color="#FFF" Offset="0.0"/>
                <GradientStop Color="#EEE" Offset="1.0"/>
            </GradientStopCollection>
        </GradientBrush.GradientStops>
    </LinearGradientBrush>
    <LinearGradientBrush x:Key="DarkBrush" StartPoint="0,0" EndPoint="0,1">
        <GradientBrush.GradientStops>
            <GradientStopCollection>
                <GradientStop Color="#FFF" Offset="0.0"/>
                <GradientStop Color="#AAA" Offset="1.0"/>
            </GradientStopCollection>
        </GradientBrush.GradientStops>
    </LinearGradientBrush>
    <LinearGradientBrush x:Key="PressedBrush" StartPoint="0,0" EndPoint="0,1">
        <GradientBrush.GradientStops>
            <GradientStopCollection>
                <GradientStop Color="#BBB" Offset="0.0"/>
                <GradientStop Color="#EEE" Offset="0.1"/>
                <GradientStop Color="#EEE" Offset="0.9"/>
                <GradientStop Color="#FFF" Offset="1.0"/>
            </GradientStopCollection>
        </GradientBrush.GradientStops>
    </LinearGradientBrush>
    <SolidColorBrush x:Key="DisabledForegroundBrush" Color="#888" />
    <SolidColorBrush x:Key="DisabledBackgroundBrush" Color="#EEE" />
    <SolidColorBrush x:Key="WindowBackgroundBrush" Color="#FFF" />
    <SolidColorBrush x:Key="SelectedBackgroundBrush" Color="#DDD" />
    <LinearGradientBrush x:Key="NormalBorderBrush" StartPoint="0,0" EndPoint="0,1">
        <GradientBrush.GradientStops>
            <GradientStopCollection>
                <GradientStop Color="#CCC" Offset="0.0"/>
                <GradientStop Color="#444" Offset="1.0"/>
            </GradientStopCollection>
        </GradientBrush.GradientStops>
    </LinearGradientBrush>
    <LinearGradientBrush x:Key="HorizontalNormalBorderBrush" StartPoint="0,0" EndPoint="1,0">
        <GradientBrush.GradientStops>
            <GradientStopCollection>
                <GradientStop Color="#CCC" Offset="0.0"/>
                <GradientStop Color="#444" Offset="1.0"/>
            </GradientStopCollection>
        </GradientBrush.GradientStops>
    </LinearGradientBrush>
    <LinearGradientBrush x:Key="DefaultedBorderBrush" StartPoint="0,0" EndPoint="0,1">
        <GradientBrush.GradientStops>
            <GradientStopCollection>
                <GradientStop Color="#777" Offset="0.0"/>
                <GradientStop Color="#000" Offset="1.0"/>
            </GradientStopCollection>
        </GradientBrush.GradientStops>
    </LinearGradientBrush>
    <LinearGradientBrush x:Key="PressedBorderBrush" StartPoint="0,0" EndPoint="0,1">
        <GradientBrush.GradientStops>
            <GradientStopCollection>
                <GradientStop Color="#444" Offset="0.0"/>
                <GradientStop Color="#888" Offset="1.0"/>
            </GradientStopCollection>
        </GradientBrush.GradientStops>
    </LinearGradientBrush>
    <SolidColorBrush x:Key="DisabledBorderBrush" Color="#AAA" />
    <SolidColorBrush x:Key="SolidBorderBrush" Color="#888" />
    <SolidColorBrush x:Key="LightBorderBrush" Color="#AAA" />
    <SolidColorBrush x:Key="GlyphBrush" Color="#444" />
    <SolidColorBrush x:Key="LightColorBrush" Color="#DDD" />
    <Style x:Key="{x:Type CheckBox}" TargetType="CheckBox">
        <Setter Property="SnapsToDevicePixels" Value="true"/>
        <Setter Property="OverridesDefaultStyle" Value="true"/>
        <Setter Property="FocusVisualStyle"    Value="{StaticResource CheckBoxFocusVisual}"/>
        <Setter Property="Template">
            <Setter.Value>
                <ControlTemplate TargetType="CheckBox">
                    <BulletDecorator Background="Transparent" PreviewMouseLeftButtonDown="BulletDecorator_PreviewMouseLeftButtonDown">
                        <BulletDecorator.Bullet>
                            <Border x:Name="chbStyleBorder"  
                              Width="13" 
                              Height="13" 
                              CornerRadius="0" 
                              Background="{StaticResource NormalBrush}"
                              BorderThickness="1"
                              BorderBrush="{StaticResource NormalBorderBrush}">
                                <Path 
                                    Width="7" Height="7" 
                                    x:Name="chbStyleCheckMark"
                                    SnapsToDevicePixels="False" 
                                    Stroke="{StaticResource GlyphBrush}"
                                    StrokeThickness="2"
                                    Data="M 0 0 L 7 7 M 0 7 L 7 0" />
                            </Border>
                        </BulletDecorator.Bullet>
                        <ContentPresenter Margin="4,0,0,0"
                            VerticalAlignment="Top"
                            HorizontalAlignment="Left"
                            RecognizesAccessKey="True" />
                    </BulletDecorator>
                    <ControlTemplate.Triggers>
                        <Trigger Property="IsChecked" Value="false">
                            <Setter TargetName="chbStyleCheckMark" Property="Visibility" Value="Collapsed"/>
                        </Trigger>
                        <Trigger Property="IsChecked" Value="{x:Null}">
                            <Setter TargetName="chbStyleCheckMark" Property="Data" Value="M 0 7 L 7 0" />
                        </Trigger>
                        <Trigger Property="IsMouseOver" Value="true">
                            <Setter TargetName="chbStyleBorder" Property="Background" Value="{StaticResource DarkBrush}" />
                        </Trigger>
                        <Trigger Property="IsPressed" Value="true">
                            <Setter TargetName="chbStyleBorder" Property="Background" Value="{StaticResource PressedBrush}" />
                            <Setter TargetName="chbStyleBorder" Property="BorderBrush" Value="{StaticResource PressedBorderBrush}" />
                        </Trigger>
                        <Trigger Property="IsEnabled" Value="false">
                            <Setter TargetName="chbStyleBorder" Property="Background" Value="{StaticResource DisabledBackgroundBrush}" />
                            <Setter TargetName="chbStyleBorder" Property="BorderBrush" Value="{StaticResource DisabledBorderBrush}" />
                            <Setter Property="Foreground" Value="{StaticResource DisabledForegroundBrush}"/>
                        </Trigger>
                    </ControlTemplate.Triggers>
                </ControlTemplate>
            </Setter.Value>
        </Setter>
    </Style>
</Window.Resources>

代码隐藏：

private void BulletDecorator_PreviewMouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
    if ((e.OriginalSource is Border && ((Border)e.OriginalSource).Name == "chbStyleBorder") || (e.OriginalSource is Path && ((Path)e.OriginalSource).Name == "chbStyleCheckMark"))
        e.Handled = false;
    else
        e.Handled = true;
}