c# - WinRT、C#、画布和儿童惯性滚动

Question

情况：WinRT 应用程序，主页面上的画布。画布有许多孩子。当用户点击画布并移动指针时，我正在尝试滚动它们。一切正常，但我不知道如何模拟惯性滚动。

编码：

private GestureRecognizer gr = new GestureRecognizer();
public MainPage()
        {
            this.InitializeComponent();


            gr.GestureSettings = GestureSettings.ManipulationTranslateInertia;
            gr.AutoProcessInertia = true;
        }

我订阅了一些画布事件：

//Pressed
private void Canvas_PointerPressed(object sender, PointerRoutedEventArgs e)
        {
            if (e.Pointer.PointerDeviceType == Windows.Devices.Input.PointerDeviceType.Touch)
            {


                var _ps = e.GetIntermediatePoints(cnvMain);
                if (_ps != null && _ps.Count > 0)
                {
                    gr.ProcessDownEvent(_ps[0]);
                    e.Handled = true;

                    Debug.WriteLine("Pressed");
                }
                initialPoint = e.GetCurrentPoint(cnvMain).Position.X;
            }
        }



//Released
private void Canvas_PointerReleased(object sender, PointerRoutedEventArgs e)
        {
            if (e.Pointer.PointerDeviceType == Windows.Devices.Input.PointerDeviceType.Touch)
            {

                var _ps = e.GetIntermediatePoints(cnvMain);
                if (_ps != null && _ps.Count > 0)
                {
                    gr.ProcessUpEvent(_ps[0]);
                    e.Handled = true;

                    Debug.WriteLine("Released");

            }
        }

// Moved
private void Canvas_PointerMoved(object sender, PointerRoutedEventArgs e)
        {

            if (gr.IsActive || gr.IsInertial)
            {

                                   gr.ProcessMoveEvents(e.GetIntermediatePoints(null));


// Here is my code for translation of children
                e.Handled = true;
            }
        }

所以，我可以翻译canvas子，但没有惯性。我该如何启用它？

不幸的是，由于特定数据，我无法在此应用中使用 GridView 或 ListView 之类的东西。

Answer 1

你应该使用GestureRecognizerwith ManipulationInertiaStarting。这应该为您提供足够的信息来实现惯性滚动。