鼠标移动时，光标相对于对象的位置

 

鼠标在一个物体上移动时，能够计算出光标相对于任何其它对象的相对位置。

 <Grid x:Name="LayoutRoot" Background="White">
        <Grid HorizontalAlignment="Left" VerticalAlignment="Top" Name="grid1" Background="Red" Width="100" Height="100" MouseEnter="Grid_MouseEnter"
               MouseMove="Grid_MouseMove"
              MouseLeave="Grid_MouseLeave"
              >
            
        </Grid>

        <Grid HorizontalAlignment="Left" VerticalAlignment="Top" Name="grid2" Margin="150,0,0,0" Background="Green" Width="100" Height="100" MouseMove="Grid_MouseMove_1">
              
        </Grid>

        <Grid HorizontalAlignment="Left" VerticalAlignment="Top" Name="grid3" Background="Blue" Margin="300,0,0,0" Width="100" Height="100" MouseMove="Grid_MouseMove_2">

        </Grid>
        <TextBlock Name="label1" Margin="20,200,0,0">
            
            <Run    Foreground="Red"  >
               mouse 离grid1左上角距离:
                 
            </Run>
           
            <LineBreak></LineBreak>
            <Run  Foreground="Green">
               mouse 离grid2左上角距离:
            </Run>
            <LineBreak/>
            <Run  Foreground="Blue">
               mouse 离grid3左上角距离:
            </Run>
            
            
            
        </TextBlock>

    </Grid>

Code
  public partial class Page : UserControl
     {
         public Page()
         {
             InitializeComponent();
         }

         private void Grid_MouseEnter(object sender, MouseEventArgs e)
         {

         }

         private void Grid_MouseMove(object sender, MouseEventArgs e)
         {
           this.label1.Text="Mouse 离grid1距离为:"+e.GetPosition(this.grid1)+"\r\n";
           this.label1.Text += "Mouse 离grid2距离为:" + e.GetPosition(this.grid2) + "\r\n";
           this.label1.Text += "Mouse 离grid3距离为:" + e.GetPosition(this.grid3); 
             
         }

         private void Grid_MouseLeave(object sender, MouseEventArgs e)
         {

         }

         private void Grid_MouseMove_1(object sender, MouseEventArgs e)
         {

             //this.label1.d = "<Run    Foreground=\"Red\"  > mouse 离grid1中心距离:</Run>" + e.GetPosition(this.grid1) + "<LineBreak></LineBreak>";
            this.label1.Text = "Mouse 离grid1距离为:" + e.GetPosition(this.grid1) + "\r\n";
             this.label1.Text += "Mouse 离grid2距离为:" + e.GetPosition(this.grid2) + "\r\n";
             this.label1.Text += "Mouse 离grid3距离为:" + e.GetPosition(this.grid3); 
         }

         private void Grid_MouseMove_2(object sender, MouseEventArgs e)
         {
             this.label1.Text = "Mouse 离grid1距离为:" + e.GetPosition(this.grid1) + "\r\n";
             this.label1.Text += "Mouse 离grid2距离为:" + e.GetPosition(this.grid2) + "\r\n";
             this.label1.Text += "Mouse 离grid3距离为:" + e.GetPosition(this.grid3); 
         }
     }