WPF - 路径几何...有没有办法绑定数据属性？

I have a ControlTemplate that serves as a "Bubble" popup on the AdornerLayer of a given control.

我有一个ControlTemplate,它作为给定控件的AdornerLayer上的“Bubble”弹出窗口。

It works fine but I need to be able to calculate where it should display (middle/ bottom).

它工作正常但我需要能够计算它应该显示的位置(中间/底部)。

Instead of:

<Path Stroke="Black" Fill="Black" Data="M 15 20 L 15 0 33 20" Margin="0 1 0 0"/>

I am looking for (obviously this won't work but it illustrates what I'm trying to accomplish:

我正在寻找(显然这不起作用,但它说明了我正在努力实现的目标:

<Path Stroke="Black" Fill="Black" Data="M {TemplateBinding Left} 20 L 15 0 33 20"/>

Can this be done with a ValueConverter? I just can't visualize a solution for some reason. I'm also open to alternatives.

可以使用ValueConverter完成吗?由于某种原因,我无法想象解决方案。我也愿意接受替代方案。

Thanks for reading and if I can provide more info please just ask.

感谢阅读,如果我能提供更多信息,请问问。

1 个解决方案

#1

If you want a value converter that you can use to convert a string into the path data, you might like to try the universal value converter I wrote a while back.

如果你想要一个可以用来将字符串转换成路径数据的值转换器,你可能想尝试我之前写的通用值转换器。

Alternatively, to bind to a single property, you will have to expand your geometry by adding the various geometry objects into your XAML, rather than using the string shorthand. For example ...

或者,要绑定到单个属性,您必须通过将各种几何对象添加到XAML中来扩展几何体,而不是使用字符串速记。例如 ...

<Path Stroke="Black" StrokeThickness="1">
  <Path.Data>
    <PathGeometry>
      <PathGeometry.Figures>
        <PathFigureCollection>
          <PathFigure IsClosed="True" StartPoint="10,100">
            <PathFigure.Segments>
              <PathSegmentCollection>
                <LineSegment Point="{Binding MyPropertyPath}" />
                <LineSegment Point="100,50" />
              </PathSegmentCollection>
            </PathFigure.Segments>
          </PathFigure>
        </PathFigureCollection>
      </PathGeometry.Figures>
    </PathGeometry>
  </Path.Data>
</Path>

#1