通过TemplateBinding添加RoutedEvent
本文关键字:RoutedEvent 添加 TemplateBinding 通过 | 更新日期: 2023-09-27 18:26:43
我想在XAML字典中的Border
上使用RoutedEvent
。RoutedEvent
来自模板所在的类,我如何实现这一点?
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>
我认为在您的情况下,您可以使用EventSetter
,它只是为了做到这一点而设计的。对你来说,它看起来像这样:
<Style TargetType="{x:Type SomeControl}">
<EventSetter Event="Border.MouseLeftButtonDown" Handler="LogoClick" />
...
</Style>
Note:
EvenSetter
不能通过触发器设置,也不能在主题资源字典中包含的样式中使用,因此通常会放在当前样式的开头。
有关更多信息,请参阅:
MSDN 中的EventSetter类
或者,如果您需要在ResourceDictionary
中使用它,您可以使用不同的方法。创建DependencyProperty
(也可以附加)。附有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...
}
}
如果您尝试设置我们称为On Sample
的属性的值,您将能够在其中执行您需要的操作(几乎与事件一样)。
根据事件设置属性的值,您可能会喜欢:
<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>
我终于找到了一个解决方案,我使用了InputBindings
,然后使用了Commands
。
<Border.InputBindings>
<MouseBinding Command="presentation:Commands.LogoClickCommand" Gesture="LeftClick" />
</Border.InputBindings>
这不是我想要的,但它很有效:)