通过TemplateBinding添加RoutedEvent

时间:2013-08-07 02:36:12

标签: c# wpf border routed-events templatebinding

我想在XAML词典中的RoutedEvent上使用BorderRoutedEvent来自模板所在的类,我该如何实现?

ModernWindow.cs

/// <summary>
/// Gets fired when the logo is clicked.
/// </summary>
public static readonly RoutedEvent LogoClickEvent = EventManager.RegisterRoutedEvent("LogoClickRoutedEventHandler", RoutingStrategy.Bubble, typeof(RoutedEventHandler), typeof(ModernWindow));

/// <summary>
/// The routedeventhandler for LogoClick
/// </summary>
public event RoutedEventHandler LogoClick 
{
    add { AddHandler(LogoClickEvent, value); }
    remove { RemoveHandler(LogoClickEvent, value); }
}

/// <summary>
/// 
/// </summary>
protected virtual void OnLogoClick() 
{
    RaiseEvent(new RoutedEventArgs(LogoClickEvent, this));
}

ModernWindow.xaml

<!-- logo -->
<Border MouseLeftButtonDown="{TemplateBinding LogoClick}" Background="{DynamicResource Accent}" Width="36" Height="36" HorizontalAlignment="Right" VerticalAlignment="Top" Margin="0,0,76,0">
    <Image Source="{TemplateBinding Logo}" Stretch="UniformToFill" />
</Border>

2 个答案:

答案 0 :(得分:2)

我最终找到了一个解决方案,我使用InputBindings然后使用Commands

<Border.InputBindings>
    <MouseBinding Command="presentation:Commands.LogoClickCommand" Gesture="LeftClick" />
</Border.InputBindings>

这不是我想要的,但它有效:)

答案 1 :(得分:1)

我认为在您的情况下,您可以使用EventSetter,它只是为此而设计的。对你而言,它看起来像这样:

<Style TargetType="{x:Type SomeControl}">
    <EventSetter Event="Border.MouseLeftButtonDown" Handler="LogoClick" />
    ...

</Style>
无法通过触发器设置

Note: EvenSetter,并且无法在主题资源字典中包含的样式中使用,因此通常将其放在开头目前的风格。

有关详细信息,请参阅:

EventSetter Class in MSDN

或者,如果您需要在ResourceDictionary中使用它,则可以采用不同的方式。创建DependencyProperty(也可以附加)。附加DependencyProperty的示例:

属性定义:

public static readonly DependencyProperty SampleProperty =
                                          DependencyProperty.RegisterAttached("Sample",
                                          typeof(bool),
                                          typeof(SampleClass),
                                          new UIPropertyMetadata(false, OnSample));

private static void OnSample(DependencyObject sender, DependencyPropertyChangedEventArgs e)
{
    if (e.NewValue is bool && ((bool)e.NewValue) == true)
    {
        // do something...
    }
}

如果您尝试设置名为On Sample的属性值,您可以在其中执行所需操作(几乎和事件一样)。

根据您可能喜欢的事件设置属性的值:

<EventTrigger SourceName="MyBorder" RoutedEvent="Border.MouseLeftButtonDown">
    <BeginStoryboard>
        <Storyboard>
            <ObjectAnimationUsingKeyFrames Storyboard.TargetName="MyBorder" Storyboard.TargetProperty="(local:SampleClass.Sample)">
                <DiscreteObjectKeyFrame KeyTime="0:0:0">
                    <DiscreteObjectKeyFrame.Value>
                        <sys:Boolean>True</sys:Boolean>
                    </DiscreteObjectKeyFrame.Value>
                </DiscreteObjectKeyFrame>
            </ObjectAnimationUsingKeyFrames>
        </Storyboard>
    </BeginStoryboard>
</EventTrigger>