如何在WinRT中创建点按可移动控件？

Question

我在WinRT中编写了一个UserControl,我想用手指移动它.
当我使用钢笔或鼠标移动它时,它仍然在移动,但是当我用手指时它不会移动.
当我用手指时,PointerMoved不是triggert.

这是简单的xaml:

<UserControl>
    <Rectangle PointerPressed="PointerPressed" PointerMoved="PointerMoved"/>
</UserControl>

这是代码:

private Point position;

void PointerPressed(object sender, Windows.UI.Xaml.Input.PointerRoutedEventArgs e)
{
    Rectangle r = sender as Rectangle;
    var pointerPoint = e.GetCurrentPoint(r);
    position = pointerPoint.Position;
}

void PointerMoved(object sender, Windows.UI.Xaml.Input.PointerRoutedEventArgs e)
{    
    Rectangle r = sender as Rectangle;   
    var delta = e.GetCurrentPoint(r).Position;
    r.Margin = new Thickness(r.Margin.Left + delta.X - position.X, r.Margin.Top + delta.Y - position.Y, 0, 0);
}

我在这里想念什么？

编辑:
我正在使用Windows 8.1和VisualStudio 2013.
也许这是一个新功能^^

Answer 1

它比你想象的简单!

<Rectangle Width="100" Height="100" Fill="White"
    ManipulationMode="TranslateX,TranslateY" 
    ManipulationDelta="Rectangle_ManipulationDelta_1" />

private void Rectangle_ManipulationDelta_1(object sender, ManipulationDeltaRoutedEventArgs e)
{
    var _Rectangle = sender as Windows.UI.Xaml.Shapes.Rectangle;
    var _Transform = (_Rectangle.RenderTransform as CompositeTransform)
        ?? (_Rectangle.RenderTransform = new CompositeTransform()) as CompositeTransform;
    _Transform.TranslateX += e.Delta.Translation.X;
    _Transform.TranslateY += e.Delta.Translation.Y;
}

祝你好运!