在Windows 8/WinRT中实现DragStarted DragDelta事件

Question

我如何将DragStarted DragDelta事件附加到网格中windows 8 / WinRT.我用windows GestureService.GetGestureListener()方法做了同样的 方法.我试图用Windows 8中的ManipulationStarted和ManipulationDelta事件替换代码.但结果并不相同.在Windows手机中进行单次拖动,它会进入DragDelta事件2次或更多次.但另一方面,在Windows 8中,在ManupulationDelta事件中,它只针对类似的Drag操作触发一次.

Answer 1

是的,我想我知道你想要什么.

假设您有一些像这样的XAML:

<Grid Margin="50">
    <Grid.ColumnDefinitions>
        <ColumnDefinition />
        <ColumnDefinition />
    </Grid.ColumnDefinitions>
    <Grid.RowDefinitions>
        <RowDefinition />
        <RowDefinition />
    </Grid.RowDefinitions>
    <Rectangle Fill="Blue" x:Name="MyRect" />
</Grid>

您想Grid通过拖动它来移动该矩形.

只需使用此代码:

public MainPage()
{
    this.InitializeComponent();
    MyRect.ManipulationMode = ManipulationModes.TranslateX | ManipulationModes.TranslateY;
    MyRect.ManipulationDelta += Rectangle_ManipulationDelta;
    MyRect.ManipulationCompleted += Rectangle_ManipulationCompleted;
}

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

private void Rectangle_ManipulationCompleted(object sender, ManipulationCompletedRoutedEventArgs e)
{
    var _Rectangle = sender as Windows.UI.Xaml.Shapes.Rectangle;
    _Rectangle.RenderTransform = null;

    var _Column = System.Convert.ToInt16(_Rectangle.GetValue(Grid.ColumnProperty));
    if (_Column <= 0 && e.Cumulative.Translation.X > _Rectangle.RenderSize.Width * .5)
        _Rectangle.SetValue(Grid.ColumnProperty, 1);
    else if (_Column == 1 && e.Cumulative.Translation.X < _Rectangle.RenderSize.Width * -.5)
        _Rectangle.SetValue(Grid.ColumnProperty, 0);

    var _Row = System.Convert.ToInt16(_Rectangle.GetValue(Grid.RowProperty));
    if (_Row <= 0 && e.Cumulative.Translation.Y > _Rectangle.RenderSize.Height * .5)
        _Rectangle.SetValue(Grid.RowProperty, 1);
    else if (_Row == 1 && e.Cumulative.Translation.Y < _Rectangle.RenderSize.Height * -.5)
        _Rectangle.SetValue(Grid.RowProperty, 0);
}

为了这:

希望我亲近!祝你好运!