wpf - 从 System.Windows.Shapes.Path 获取 ScaleTransform 和 RotateTransform

Question

我试图从解析 XAML 节点的代码中获取RotateTransform值（度）和ScaleTransform ，在本例中为 System.Windows.Shapes.Path。

<Path Data="M272,0 L0,0" Height="12.274" Canvas.Left="17.997" StrokeStartLineCap="Flat" 
  StrokeEndLineCap="Flat" Stroke="White" StrokeThickness="3" StrokeLineJoin="Miter" 
  Canvas.Top="44.53" Width="146.499" Stretch="Fill" RenderTransformOrigin="0.5,0.5">
  <Path.RenderTransform>
        <TransformGroup>
            <ScaleTransform ScaleX="-1"/>
            <SkewTransform/>
            <RotateTransform Angle="-90"/>
            <TranslateTransform/>
        </TransformGroup>
    </Path.RenderTransform>
</Path>

使用RenderTransform，我得到一个矩阵值，我无法从中获得角度和 scaleX。

myPath.RenderTransform.Value

我怎样才能得到这些信息？

谢谢

Answer 1

好的，这是解决方案：

TransformGroup tg = myPath.RenderTransform as TransformGroup;

if (tg != null)
{
    // Get rotation angle
    RotateTransform rt = tg.Children[2] as RotateTransform;
    // DoSomething with rt.Angle

    // Get scale factor
    ScaleTransform st = tg.Children[0] as ScaleTransform;
    // DoSomething with st.ScaleX or st.ScaleY
}