如何在Silverlight中獲取路徑的X和Y位置？

Question

我有一些不在任何畫布內的路徑，我想知道如何獲得他們的X和Y位置來創建基於它的動畫。

<Grid x:Name="LayoutRoot" Width="640" Height="480"> 
     <Image Source="SC.png" Stretch="Fill" Width="640" Height="480" d:LayoutOverrides="HorizontalAlignment"/> 

     <Path x:Name="but77" DataContext="77" MouseLeftButtonDown="MapClick" MouseEnter="MouseOver" MouseLeave="MouseOut" Fill="#FF2400FF" Stretch="Fill" Stroke="Black" Height="17.5" HorizontalAlignment="Right" Margin="0,104.875,68.125,0" VerticalAlignment="Top" Width="17.875" UseLayoutRounding="False" Data="M555,105.375 L554.5,121.75 L571,121.875 L571.375,105.5 z" Opacity="0"/> 
     <Path x:Name="but51" DataContext="51" MouseLeftButtonDown="MapClick" MouseEnter="MouseOver" MouseLeave="MouseOut" Fill="#FF2400FF" Stretch="Fill" Stroke="Black" Height="17.5" HorizontalAlignment="Right" Margin="0,164.125,70.375,0" VerticalAlignment="Top" Width="17.875" Opacity="0" UseLayoutRounding="False" Data="M555,105.375 L554.5,121.75 L571,121.875 L571.375,105.5 z"/> 
     <Path x:Name="but50" DataContext="50" MouseLeftButtonDown="MapClick" MouseEnter="MouseOver" MouseLeave="MouseOut" Fill="#FF2400FF" Stretch="Fill" Stroke="Black" Height="17.5" HorizontalAlignment="Right" Margin="0,0,70.375,178.375" VerticalAlignment="Bottom" Width="17.875" Opacity="0" UseLayoutRounding="False" Data="M555,105.375 L554.5,121.75 L571,121.875 L571.375,105.5 z"/> 
     <Path x:Name="but82" DataContext="82" MouseLeftButtonDown="MapClick" MouseEnter="MouseOver" MouseLeave="MouseOut" Fill="#FF2400FF" Stretch="Fill" Stroke="Black" Height="17.5" HorizontalAlignment="Right" Margin="0,0,78.75,156.875" VerticalAlignment="Bottom" Width="17.875" Opacity="0" UseLayoutRounding="False" Data="M555,105.375 L554.5,121.75 L571,121.875 L571.375,105.5 z"/> 

</Grid> 

Answer 1

你需要的工具是TransformToVisual方法，該方法是由所有UIElement衍生物，包括Path提供。要查找相對於包含的某個路徑的X，Y位置，請使用： -

GeneralTransform gt = but77.TransformToVisual(LayoutRoot); 
Point but77Position = gt.Transform(new Point(0,0));