i:EventTrigger EventName - 其中一些有效,有些则无效。为什么? [英] i:EventTrigger EventName - some of them work, others not. Why?
问题描述
我使用MS Blend InteractionTrigger构建一个控件。一些像MouseOver或MouseLeave这样的EventNames非常适合。当我更改EventName(MouseDown,MouseLeftButtonDown) 触发器不再起作用。为什么不呢?
i build a control with a MS Blend InteractionTrigger. Some of the EventNames like MouseOver or MouseLeave work perfect. When i change the EventName (MouseDown, MouseLeftButtonDown) the Trigger doesn't work any more. Why not?
工作:
< i:EventTrigger EventName =" MouseEnter" SOURCENAME = QUOT;&的StackPanel QUOT; >
&NBSP;&NBSP;&NBSP; &NBSP;&NBSP;&NBSP; &NBSP;&NBSP;&NBSP; &NBSP;&NBSP;&NBSP; < ei:ChangePropertyAction PropertyName =" Background"值="红色"/>
&NBSP;&NBSP;&NBSP; &NBSP;&NBSP;&NBSP; &NBSP;&NBSP;&NBSP; < / i:EventTrigger>
<i:EventTrigger EventName="MouseEnter" SourceName="stackPanel" >
<ei:ChangePropertyAction PropertyName="Background" Value="red"/>
</i:EventTrigger>
不起作用:
< i:EventTrigger EventName =" MouseLeftButtonDown" SOURCENAME = QUOT;&的StackPanel QUOT; >
&NBSP;&NBSP;&NBSP; &NBSP;&NBSP;&NBSP; &NBSP;&NBSP;&NBSP; &NBSP;&NBSP;&NBSP; < ei:ChangePropertyAction PropertyName =" Background"值="红色"/>
&NBSP;&NBSP;&NBSP; &NBSP;&NBSP;&NBSP; &NBSP;&NBSP;&NBSP; < / i:EventTrigger>
<i:EventTrigger EventName="MouseLeftButtonDown" SourceName="stackPanel" >
<ei:ChangePropertyAction PropertyName="Background" Value="red"/>
</i:EventTrigger>
任何想法?
推荐答案
通常在这种情况下,它意味着控件本身正在处理事件而不是传递它。例如,Button控件不会传递MouseLeftButtonDown,而是公开Click事件。
Usually in this case it means that the control itself is handling the event and not passing it on. For example, a Button control will not pass along MouseLeftButtonDown, but instead exposes the Click event.
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