Question

我正在WPF中设计一个UserControl。有一个带有一些路径的画布。在这些路径中，我有两个椭圆（图片的顶部和底部）。我在Ellipses的MouseUp事件被触发时做了一些工作，但是当用户点击加/减路径时它们没有被触发！我看过this和this。但似乎在这里冒泡和隧道不是这种情况，因为减去/加号路径不包含在椭圆中。以下是其中一个省略号的代码：

<Canvas Width="96" Height="550" MouseUp="plusPath_MouseUp" Background="Transparent">
    <Path x:Name="Path" Width="96" Height="550" Canvas.Left="0"  StrokeThickness="6" StrokeLineJoin="Round" Stroke="#FF465546" Canvas.Top="0" Stretch="Fill" Data="..."/>
    <Ellipse x:Name="zoomIn"  Width="68" Height="68" Canvas.Left="14" Canvas.Top="18.5143" />
    <Ellipse x:Name="zoomOut" Width="68" Height="68" Canvas.Left="14" Canvas.Top="468.79" />
    <Path  x:Name="minusPath" Cursor="Hand" Width="36" Height="6" Canvas.Left="30" Canvas.Top="500" Stretch="Fill" StrokeThickness="6" StrokeLineJoin="Round" Stroke="#FF87A698" Data="F1 M 33.0001,501.956L 63.0001,501.956"/>
    <Path  x:Name="plusPath" Cursor="Hand" Width="36.0001" Height="36" Canvas.Left="30" Canvas.Top="34" Stretch="Fill" StrokeThickness="6" StrokeLineJoin="Round" Stroke="#FF87A698" Data="M 34.0658,52.181L 64.0659,52.181M 49.0657,67.181L 49.0657,37.181"/>
</Canvas>

我应该处理减号/加号路径的MouseUp事件还是有更好的方法？

编辑：我正在寻找最佳做法。

enter image description here

Answer 1

处理容器元素上的MouseUp（比如Grid，DockPanel，Canvas等），因为只要在子节点（Ellipse或Path）上引发MouseUp事件， 就会冒泡到根节点元素（画布） 。

<Canvas MouseUp="Handler">
   <Ellipse/>
   <Path/>
</Canvas>

如果您想知道哪个元素实际引发了该事件，您可以通过选中e.OriginalSource来获取事件的原始发件人。（椭圆或路径）。

private void Handler(object sender, MouseButtonEventArgs e)
{
    // Check actual sender here which can be Canvas, Ellipse or Path.
    Ellipse senderObject = e.OriginalSource as Ellipse;
    if(senderObject == null)
    {
       Path senderPath = e.OriginalSource as Path;
    }
}

Answer 2

您可以将Ellipse和Path放入Grid并抓住MouseUp="zoomIn_MouseUp"：

<Grid Cursor="Hand" MouseUp="zoomIn_MouseUp" Canvas.Left="14" Canvas.Top="18.5143">
    <Ellipse x:Name="zoomIn"  Width="68" Height="68"/>
    <Path x:Name="plusPath" StrokeThickness="6" Width="36.0001" Height="36" StrokeLineJoin="Round" Stretch="Fill" Stroke="#FF87A698" Data="M 34.0658,52.181L 64.0659,52.181M 49.0657,67.181L 49.0657,37.181"/>
</Grid>

顶部元素阻止MouseUp为后部元素触发

2 个答案: