Taşıma İki, Üç, dört parmak kaydırma hareketleri içinde WinRT App

Question

Aşağıdaki kod var:

private Point initialpoint; 

private void ManipulationStarted(object sender, ManipulationStartedRoutedEventArgs e) 
{ 
    initialpoint = e.Position; 
} 

private void ManipulationDelta(object sender, ManipulationDeltaRoutedEventArgs e) 
{ 
    Point currentpoint = e.Position; 
    if (currentpoint.X - initialpoint.X >= 100) 
    { 
     System.Diagnostics.Debug.WriteLine("Swipe Right"); 
     e.Complete(); 
    } 
} 

çok kolay 1 parmak kaydırma hareketi işleyebilir, ama 2, 3, 4 parmak tokatlamak işlemek istiyorum jestler de. Bana bunu nasıl yapacağımı söyleyen var mı?

Answer 1

Buna göre MSDN Forum Postingpointer bildirimlerini kullanmanız gerekir. Örnek kodu çalışma ile belgeler son bağlantısından MSDN Library

bulunur:

bir işaretçi amacı, böyle bir şekilde, bir giriş cihazından tek ve benzersiz girdi "temas", (a PointerPoint) temsil eder (

fare, kalem/kalem, tek parmak veya birden çok parmak). Sistem, bir kontak ilk tespit edildiğinde bir işaretçi oluşturur ve işaretçi (sapma) algılama aralığını bıraktığında veya iptal edildiğinde imha eder. Birden fazla cihaz veya çoklu dokunma girişi durumunda, her kişi benzersiz bir işaretçi olarak ele alınır.

---

Sadece bir uyarı, ben bu kodu test etmek için bir çok noktalı dokunma Windows 8 cihazı yok. Bu nedenle, tüm sınırlamaları ile Simuator'da test edilmiştir ve yukarıdaki bağlantılarda da belirtildiği gibi, Windows 8, birden fazla parmağın algılanması için, daha düşük seviyeli fonksiyonları kullanmak zorunda olduğunuz bir jest desteğine sahip değildir.

Her şeyden önce, yukarıdaki MSDN örnek koduna iki kez daha Swing Threshold öğesinin Sınıf tanımları için iki değişken ekledim.

Dictionary<uint, Point> startLocation; 
Dictionary<uint, bool> pointSwiped; 
int swipeThresholdX = 100; 
int swipeThresholdY = 100; 

Sonra formun Oluşturucu Dictionarys başlatmak Orjinal Sözlük eklendi veya bir öğe Yeni Sözlük sitesinin

ile aynı şeyi çıkarmıştı

Sonra

startLocation = new Dictionary<uint, Point>((int)SupportedContacts.Contacts); 
pointSwiped = new Dictionary<uint, bool>((int)SupportedContacts.Contacts); 

her yerde ekleme:

startLocation[pt.PointerId] = pt.Position; 
pointSwiped[pt.PointerId] = false; 

çıkarma:

private void targetContainer_PointerMoved(object sender, PointerRoutedEventArgs e) 
{ 
    Windows.UI.Input.PointerPoint currentPoint = e.GetCurrentPoint(targetContainer); 
    if (currentPoint.IsInContact) 
    { 
     if (startLocation.ContainsKey(currentPoint.PointerId)) 
     { 
      Point startPoint = startLocation[currentPoint.PointerId]; 
      if (Math.Abs(currentPoint.Position.X - startPoint.X) > swipeThresholdX) // I only did one Axis for testing 
      { 
       pointSwiped[currentPoint.PointerId] = true; 
      } 
     } 
    } 
    updateInfoPop(e); 
}    

Final Modifiye MSDN Örnek: Ben ayrı sınıfa Mark Hall cevabını adapte ve yukarı kaydırma hareketiyle başa

using System; 
using System.Collections.Generic; 
using System.IO; 
using System.Linq; 
using Windows.Foundation; 
using Windows.Foundation.Collections; 
using Windows.UI.Xaml; 
using Windows.UI.Xaml.Controls; 
using Windows.UI.Xaml.Controls.Primitives; 
using Windows.UI.Xaml.Data; 
using Windows.UI.Xaml.Input; 
using Windows.UI.Xaml.Media; 
using Windows.UI.Xaml.Navigation; 

// The Blank Page item template is documented at http://go.microsoft.com/fwlink/?LinkId=234238 

namespace PointerInput 
{ 
    /// <summary> 
    /// An empty page that can be used on its own or navigated to within a Frame. 
    /// </summary> 
    public sealed partial class MainPage : Page 
    { 
     Windows.Devices.Input.TouchCapabilities SupportedContacts = new Windows.Devices.Input.TouchCapabilities(); 

     uint numActiveContacts; 
     Dictionary<uint, Windows.UI.Input.PointerPoint> contacts; 
     Dictionary<uint, Point> startLocation; 
     Dictionary<uint, bool> pointSwiped; 
     int swipeThresholdX = 100; 
     int swipeThresholdY = 100; 

     public MainPage() 
     { 
      this.InitializeComponent(); 
      numActiveContacts = 0; 
      contacts = new Dictionary<uint, Windows.UI.Input.PointerPoint>((int)SupportedContacts.Contacts); 
      startLocation = new Dictionary<uint, Point>((int)SupportedContacts.Contacts); 
      pointSwiped = new Dictionary<uint, bool>((int)SupportedContacts.Contacts); 
      targetContainer.PointerPressed += new PointerEventHandler(targetContainer_PointerPressed); 
      targetContainer.PointerEntered += new PointerEventHandler(targetContainer_PointerEntered); 
      targetContainer.PointerReleased += new PointerEventHandler(targetContainer_PointerReleased); 
      targetContainer.PointerExited += new PointerEventHandler(targetContainer_PointerExited); 
      targetContainer.PointerCanceled += new PointerEventHandler(targetContainer_PointerCanceled); 
      targetContainer.PointerCaptureLost += new PointerEventHandler(targetContainer_PointerCaptureLost); 
      targetContainer.PointerMoved += new PointerEventHandler(targetContainer_PointerMoved); 
     } 

     // PointerPressed and PointerReleased events do not always occur in pairs. 
     // Your app should listen for and handle any event that might conclude a pointer down action 
     // (such as PointerExited, PointerCanceled, and PointerCaptureLost). 
     void targetContainer_PointerPressed(object sender, PointerRoutedEventArgs e) 
     { 
      if (Convert.ToBoolean(SupportedContacts.TouchPresent) && (numActiveContacts > SupportedContacts.Contacts)) 
      { 
       // cannot support more contacts 
       eventLog.Text += "\nNumber of contacts exceeds the number supported by the device."; 
       return; 
      } 

      Windows.UI.Input.PointerPoint pt = e.GetCurrentPoint(targetContainer); 

      // Update event sequence. 
      eventLog.Text += "\nDown: " + pt.PointerId; 

      // Change background color of target when pointer contact detected. 
      targetContainer.Fill = new SolidColorBrush(Windows.UI.Colors.Green); 

      // Check if pointer already exists (if enter occurred prior to down). 
      if (contacts.ContainsKey(pt.PointerId)) 
      { 
       return; 
      } 
      contacts[pt.PointerId] = pt; 
      startLocation[pt.PointerId] = pt.Position; 
      pointSwiped[pt.PointerId] = false; 
      ++numActiveContacts; 
      e.Handled = true; 

      // Display pointer details. 
      createInfoPop(e); 
     } 

     private void targetContainer_PointerEntered(object sender, PointerRoutedEventArgs e) 
     { 
      Windows.UI.Input.PointerPoint pt = e.GetCurrentPoint(targetContainer); 

      // Update event sequence. 
      eventLog.Text += "\nOver: " + pt.PointerId; 

      if (contacts.Count == 0) 
      { 
       // Change background color of target when pointer contact detected. 
       targetContainer.Fill = new SolidColorBrush(Windows.UI.Colors.Blue); 
      } 

      // Check if pointer already exists (if enter occurred prior to down). 
      if (contacts.ContainsKey(pt.PointerId)) 
      { 
       return; 
      } 

      // Push new pointer Id onto expando target pointers array. 
      contacts[pt.PointerId] = pt; 
      startLocation[pt.PointerId] = pt.Position; 
      pointSwiped[pt.PointerId] = false; 
      ++numActiveContacts; 
      e.Handled = true; 

      // Display pointer details. 
      createInfoPop(e); 
     } 

     // Fires for for various reasons, including: 
     // - User interactions 
     // - Programmatic caputre of another pointer 
     // - Captured pointer was deliberately released 
     // PointerCaptureLost can fire instead of PointerReleased. 
     private void targetContainer_PointerCaptureLost(object sender, PointerRoutedEventArgs e) 
     { 
      Windows.UI.Input.PointerPoint pt = e.GetCurrentPoint(targetContainer); 

      // Update event sequence. 
      eventLog.Text += "\nPointer capture lost: " + pt.PointerId; 

      if (contacts.ContainsKey(pt.PointerId)) 
      { 
       checkSwipe(); 
       contacts[pt.PointerId] = null; 
       contacts.Remove(pt.PointerId); 
       startLocation.Remove(pt.PointerId); 
       if (pointSwiped.ContainsKey(pt.PointerId)) 
        pointSwiped.Remove(pt.PointerId); 

       --numActiveContacts; 
      } 

      // Update the UI and pointer details. 
      foreach (TextBlock tb in pointerInfo.Children) 
      { 
       if (tb.Name == e.Pointer.PointerId.ToString()) 
       { 
        pointerInfo.Children.Remove(tb); 
       } 
      } 

      if (contacts.Count == 0) 
      { 
       targetContainer.Fill = new SolidColorBrush(Windows.UI.Colors.Black); 
      } 

      e.Handled = true; 
     } 

     // Fires for for various reasons, including: 
     // - A touch contact is canceled by a pen coming into range of the surface. 
     // - The device doesn't report an active contact for more than 100ms. 
     // - The desktop is locked or the user logged off. 
     // - The number of simultaneous contacts exceeded the number supported by the device. 
     private void targetContainer_PointerCanceled(object sender, PointerRoutedEventArgs e) 
     { 
      Windows.UI.Input.PointerPoint pt = e.GetCurrentPoint(targetContainer); 

      // Update event sequence. 
      eventLog.Text += "\nPointer canceled: " + pt.PointerId; 

      if (contacts.ContainsKey(pt.PointerId)) 
      { 
       checkSwipe(); 
       contacts[pt.PointerId] = null; 
       contacts.Remove(pt.PointerId); 
       startLocation.Remove(pt.PointerId); 
       if (pointSwiped.ContainsKey(pt.PointerId)) 
        pointSwiped.Remove(pt.PointerId); 

       --numActiveContacts; 
      } 

      // Update the UI and pointer details. 
      foreach (TextBlock tb in pointerInfo.Children) 
      { 
       if (tb.Name == e.Pointer.PointerId.ToString()) 
       { 
        pointerInfo.Children.Remove(tb); 
       } 
      } 

      if (contacts.Count == 0) 
      { 
       targetContainer.Fill = new SolidColorBrush(Windows.UI.Colors.Black); 
      } 

      e.Handled = true; 
     } 

     private void targetContainer_PointerExited(object sender, PointerRoutedEventArgs e) 
     { 
      Windows.UI.Input.PointerPoint pt = e.GetCurrentPoint(targetContainer); 

      // Update event sequence. 
      eventLog.Text += "\nPointer exited: " + pt.PointerId; 

      if (contacts.ContainsKey(pt.PointerId)) 
      { 
       checkSwipe(); 
       contacts[pt.PointerId] = null; 
       contacts.Remove(pt.PointerId); 
       startLocation.Remove(pt.PointerId); 
       if (pointSwiped.ContainsKey(pt.PointerId)) 
        pointSwiped.Remove(pt.PointerId); 

       --numActiveContacts; 
      } 

      // Update the UI and pointer details. 
      foreach (TextBlock tb in pointerInfo.Children) 
      { 
       if (tb.Name == e.Pointer.PointerId.ToString()) 
       { 
        pointerInfo.Children.Remove(tb); 
       } 
      } 

      if (contacts.Count == 0) 
      { 
       targetContainer.Fill = new SolidColorBrush(Windows.UI.Colors.Gray); 

      } 
      e.Handled = true; 
     } 

     /// <summary> 
     /// Invoked when this page is about to be displayed in a Frame. 
     /// </summary> 
     /// <param name="e">Event data that describes how this page was reached. The Parameter 
     /// property is typically used to configure the page.</param> 
     protected override void OnNavigatedTo(NavigationEventArgs e) 
     { 
     } 

     void targetContainer_PointerReleased(object sender, PointerRoutedEventArgs e) 
     { 
      foreach (TextBlock tb in pointerInfo.Children) 
      { 
       if (tb.Name == e.Pointer.PointerId.ToString()) 
       { 
        pointerInfo.Children.Remove(tb); 
       } 
      } 

      Windows.UI.Input.PointerPoint pt = e.GetCurrentPoint(targetContainer); 

      // Update event sequence. 
      eventLog.Text += "\nUp: " + pt.PointerId; 

      // Change background color of target when pointer contact detected. 
      targetContainer.Fill = new SolidColorBrush(Windows.UI.Colors.Red); 

      if (contacts.ContainsKey(pt.PointerId)) 
      { 
       checkSwipe(); 
       contacts[pt.PointerId] = null; 
       contacts.Remove(pt.PointerId); 
       startLocation.Remove(pt.PointerId); 
       if(pointSwiped.ContainsKey(pt.PointerId)) 
        pointSwiped.Remove(pt.PointerId); 

       --numActiveContacts; 
      } 
      e.Handled = true; 
     } 

     private void targetContainer_PointerMoved(object sender, PointerRoutedEventArgs e) 
     { 
      Windows.UI.Input.PointerPoint currentPoint = e.GetCurrentPoint(targetContainer); 
      if (currentPoint.IsInContact) 
      { 
       if (startLocation.ContainsKey(currentPoint.PointerId)) 
       { 
        Point startPoint = startLocation[currentPoint.PointerId]; 
        if (Math.Abs(currentPoint.Position.X - startPoint.X) > swipeThresholdX) // I only did one Axis for testing 
        { 
         pointSwiped[currentPoint.PointerId] = true; 
        } 
       } 

      } 
      updateInfoPop(e); 
     } 

     int numberOfSwipedFingers() 
     { 
      int count = 0; 
      foreach (var item in pointSwiped) 
      { 
       if (item.Value) { count += 1; } 
      } 
      return count; 
     } 

     void checkSwipe() 
     { 
      int fingers = numberOfSwipedFingers(); 
      if (fingers > 1) 
      { 
       eventLog.Text += "\nNumber of Swiped fingers = " + fingers; 
      } 
      else if (fingers == 1) 
      { 
       eventLog.Text += "\nNumber of Swiped fingers = " + fingers; 
      } 
      if(fingers > 0) 
       pointSwiped.Clear(); 
     }    

     void createInfoPop(PointerRoutedEventArgs e) 
     { 
      Windows.UI.Input.PointerPoint currentPoint = e.GetCurrentPoint(targetContainer); 
      TextBlock pointerDetails = new TextBlock(); 
      pointerDetails.Name = currentPoint.PointerId.ToString(); 
      pointerDetails.Foreground = new SolidColorBrush(Windows.UI.Colors.White); 
      pointerInfo.Children.Add(pointerDetails); 
      pointerDetails.Text = queryPointer(e); 
     } 

     void updateInfoPop(PointerRoutedEventArgs e) 
     { 
      foreach (TextBlock pointerDetails in pointerInfo.Children) 
      { 
       if (pointerDetails.Name == e.Pointer.PointerId.ToString()) 
       { 
        pointerDetails.Text = queryPointer(e); 
       } 
      } 
     } 

     String queryPointer(PointerRoutedEventArgs e) 
     { 
      Windows.UI.Input.PointerPoint currentPoint = e.GetCurrentPoint(targetContainer); 
      String details = ""; 
      switch (e.Pointer.PointerDeviceType) 
      { 
       case Windows.Devices.Input.PointerDeviceType.Mouse: 
        details += "\nPointer type: mouse"; 
        break; 
       case Windows.Devices.Input.PointerDeviceType.Pen: 
        details += "\nPointer type: pen"; 
        if (e.Pointer.IsInContact) 
        { 
         details += "\nPressure: " + currentPoint.Properties.Pressure; 
         details += "\nrotation: " + currentPoint.Properties.Orientation; 
         details += "\nTilt X: " + currentPoint.Properties.XTilt; 
         details += "\nTilt Y: " + currentPoint.Properties.YTilt; 
         details += "\nBarrel button pressed: " + currentPoint.Properties.IsBarrelButtonPressed; 
        } 
        break; 
       case Windows.Devices.Input.PointerDeviceType.Touch: 
        details += "\nPointer type: touch"; 
        details += "\nrotation: " + currentPoint.Properties.Orientation; 
        details += "\nTilt X: " + currentPoint.Properties.XTilt; 
        details += "\nTilt Y: " + currentPoint.Properties.YTilt; 
        break; 
       default: 
        details += "\nPointer type: n/a"; 
        break; 
      } 

      GeneralTransform gt = targetContainer.TransformToVisual(page); 
      Point screenPoint; 

      screenPoint = gt.TransformPoint(new Point(currentPoint.Position.X, currentPoint.Position.Y)); 
      details += "\nPointer Id: " + currentPoint.PointerId.ToString() + 
       "\nPointer location (parent): " + currentPoint.Position.X + ", " + currentPoint.Position.Y + 
       "\nPointer location (screen): " + screenPoint.X + ", " + screenPoint.Y; 
      return details; 
     } 
    } 
} 

Answer 2

Sonra

startLocation.Remove(pt.PointerId); 
pointSwiped.Remove(pt.PointerId); 

nihayet PointerMovedEvent haline getirdim aşağı, sol ve sağ.

public enum DirectionSwiped 
{ 
    None, 
    Up, 
    Down, 
    Left, 
    Right 
} 


public class SwipeEventArgs : EventArgs 
{ 
    public DirectionSwiped Direction { get; set; } 
    public int NumberOfTouches { get; set; } 
} 


public class SwipeGestureDetector 
{ 
    public EventHandler<SwipeEventArgs> SwipeDetected; 




    // How much of the grid needs to be covered by the swipe? 
    private const double SWIPE_THRESHOLD = 0.5; 

    // How much drift is allowed in the opposite axis? 
    private const int ALLOWED_DRIFT = 100; 

    Windows.Devices.Input.TouchCapabilities SupportedContacts = new Windows.Devices.Input.TouchCapabilities(); 

    uint numActiveContacts; 
    Dictionary<uint, Windows.UI.Input.PointerPoint> contacts; 
    Dictionary<uint, Point> startLocation; 
    Dictionary<uint, DirectionSwiped> pointSwiped; 

    private Grid mGrid; 





    public SwipeGestureDetector(Grid grid) 
    { 
     mGrid = grid; 

     numActiveContacts = 0; 
     contacts = new Dictionary<uint, Windows.UI.Input.PointerPoint>((int)SupportedContacts.Contacts); 
     startLocation = new Dictionary<uint, Point>((int)SupportedContacts.Contacts); 
     pointSwiped = new Dictionary<uint, DirectionSwiped>((int)SupportedContacts.Contacts); 
     grid.PointerPressed += new PointerEventHandler(Grid_PointerPressed); 
     grid.PointerEntered += new PointerEventHandler(Grid_PointerEntered); 
     grid.PointerReleased += new PointerEventHandler(Grid_PointerReleased); 
     grid.PointerExited += new PointerEventHandler(Grid_PointerExited); 
     grid.PointerCanceled += new PointerEventHandler(Grid_PointerCanceled); 
     grid.PointerCaptureLost += new PointerEventHandler(Grid_PointerCaptureLost); 
     grid.PointerMoved += new PointerEventHandler(Grid_PointerMoved); 
    } 





    // PointerPressed and PointerReleased events do not always occur in pairs. 
    // Your app should listen for and handle any event that might conclude a pointer down action 
    // (such as PointerExited, PointerCanceled, and PointerCaptureLost). 
    void Grid_PointerPressed(object sender, PointerRoutedEventArgs e) 
    { 
     if (Convert.ToBoolean(SupportedContacts.TouchPresent) && (numActiveContacts > SupportedContacts.Contacts)) 
     { 
      // cannot support more contacts 
      Debug.WriteLine("\nNumber of contacts exceeds the number supported by the device."); 
      return; 
     } 

     Windows.UI.Input.PointerPoint pt = e.GetCurrentPoint(mGrid); 

     // Check if pointer already exists (if enter occurred prior to down). 
     if (contacts.ContainsKey(pt.PointerId)) 
     { 
      return; 
     } 
     contacts[pt.PointerId] = pt; 
     startLocation[pt.PointerId] = pt.Position; 
     pointSwiped[pt.PointerId] = DirectionSwiped.None; 
     ++numActiveContacts; 
     e.Handled = true; 
    } 


    private void Grid_PointerEntered(object sender, PointerRoutedEventArgs e) 
    { 
     Windows.UI.Input.PointerPoint pt = e.GetCurrentPoint(mGrid); 

     // Check if pointer already exists (if enter occurred prior to down). 
     if (contacts.ContainsKey(pt.PointerId)) 
     { 
      return; 
     } 

     // Push new pointer Id onto expando target pointers array. 
     contacts[pt.PointerId] = pt; 
     startLocation[pt.PointerId] = pt.Position; 
     pointSwiped[pt.PointerId] = DirectionSwiped.None; 
     ++numActiveContacts; 
     e.Handled = true; 

    } 


    // Fires for for various reasons, including: 
    // - User interactions 
    // - Programmatic caputre of another pointer 
    // - Captured pointer was deliberately released 
    // PointerCaptureLost can fire instead of PointerReleased. 
    private void Grid_PointerCaptureLost(object sender, PointerRoutedEventArgs e) 
    { 
     Windows.UI.Input.PointerPoint pt = e.GetCurrentPoint(mGrid); 

     if (contacts.ContainsKey(pt.PointerId)) 
     { 
      checkSwipe(); 
      contacts[pt.PointerId] = null; 
      contacts.Remove(pt.PointerId); 
      startLocation.Remove(pt.PointerId); 
      if (pointSwiped.ContainsKey(pt.PointerId)) 
       pointSwiped.Remove(pt.PointerId); 

      --numActiveContacts; 
     } 

     e.Handled = true; 
    } 


    // Fires for for various reasons, including: 
    // - A touch contact is canceled by a pen coming into range of the surface. 
    // - The device doesn't report an active contact for more than 100ms. 
    // - The desktop is locked or the user logged off. 
    // - The number of simultaneous contacts exceeded the number supported by the device. 
    private void Grid_PointerCanceled(object sender, PointerRoutedEventArgs e) 
    { 
     Windows.UI.Input.PointerPoint pt = e.GetCurrentPoint(mGrid); 

     if (contacts.ContainsKey(pt.PointerId)) 
     { 
      checkSwipe(); 
      contacts[pt.PointerId] = null; 
      contacts.Remove(pt.PointerId); 
      startLocation.Remove(pt.PointerId); 
      if (pointSwiped.ContainsKey(pt.PointerId)) 
       pointSwiped.Remove(pt.PointerId); 

      --numActiveContacts; 
     } 

     e.Handled = true; 
    } 


    private void Grid_PointerExited(object sender, PointerRoutedEventArgs e) 
    { 
     Windows.UI.Input.PointerPoint pt = e.GetCurrentPoint(mGrid); 

     if (contacts.ContainsKey(pt.PointerId)) 
     { 
      checkSwipe(); 
      contacts[pt.PointerId] = null; 
      contacts.Remove(pt.PointerId); 
      startLocation.Remove(pt.PointerId); 
      if (pointSwiped.ContainsKey(pt.PointerId)) 
       pointSwiped.Remove(pt.PointerId); 

      --numActiveContacts; 
     } 
     e.Handled = true; 
    } 



    void Grid_PointerReleased(object sender, PointerRoutedEventArgs e) 
    { 
     Windows.UI.Input.PointerPoint pt = e.GetCurrentPoint(mGrid); 

     if (contacts.ContainsKey(pt.PointerId)) 
     { 
      checkSwipe(); 
      contacts[pt.PointerId] = null; 
      contacts.Remove(pt.PointerId); 
      startLocation.Remove(pt.PointerId); 
      if (pointSwiped.ContainsKey(pt.PointerId)) 
       pointSwiped.Remove(pt.PointerId); 

      --numActiveContacts; 
     } 
     e.Handled = true; 
    } 


    private void Grid_PointerMoved(object sender, PointerRoutedEventArgs e) 
    { 
     Windows.UI.Input.PointerPoint currentPoint = e.GetCurrentPoint(mGrid); 
     if (currentPoint.IsInContact) 
     { 
      if (startLocation.ContainsKey(currentPoint.PointerId)) 
      { 
       Point startPoint = startLocation[currentPoint.PointerId]; 

       // Compare startPoint to current location and determine if that point did a swipe? 

       double horizontalMovement = currentPoint.Position.X - startPoint.X; 
       double verticalMovement = currentPoint.Position.Y - startPoint.Y; 

       double horizontalDistance = Math.Abs(horizontalMovement); 
       double verticalDistance = Math.Abs(verticalMovement); 

       double requiredLeftMovement = mGrid.ActualWidth * SWIPE_THRESHOLD * -1; 
       double requiredRightMovement = mGrid.ActualWidth * SWIPE_THRESHOLD; 

       double requiredUpMovement = mGrid.ActualHeight * SWIPE_THRESHOLD * -1; 
       double requiredDownMovement = mGrid.ActualHeight * SWIPE_THRESHOLD; 

       if (verticalMovement < requiredUpMovement && horizontalDistance < 100) 
       { 
        pointSwiped[currentPoint.PointerId] = DirectionSwiped.Up; 
       } 
       else if (verticalMovement > requiredDownMovement && horizontalDistance < ALLOWED_DRIFT) 
       { 
        pointSwiped[currentPoint.PointerId] = DirectionSwiped.Down; 
       } 
       else if (horizontalMovement > requiredRightMovement && verticalDistance < ALLOWED_DRIFT) 
       { 
        pointSwiped[currentPoint.PointerId] = DirectionSwiped.Right; 
       } 
       else if (horizontalMovement < requiredLeftMovement && verticalDistance < ALLOWED_DRIFT) 
       { 
        pointSwiped[currentPoint.PointerId] = DirectionSwiped.Left; 
       } 
      } 
     } 
    } 





    void checkSwipe() 
    { 
     NotififyListenerIfSwiped(DirectionSwiped.Up); 
     NotififyListenerIfSwiped(DirectionSwiped.Down); 
     NotififyListenerIfSwiped(DirectionSwiped.Left); 
     NotififyListenerIfSwiped(DirectionSwiped.Right); 
    } 


    private void NotififyListenerIfSwiped(DirectionSwiped direction) 
    { 
     int fingers = numberOfSwipedFingers(direction); 
     if (fingers >= 1) 
     { 
      if (SwipeDetected != null) 
      { 
       SwipeDetected(this, new SwipeEventArgs() { Direction = direction, NumberOfTouches = fingers }); 
      } 
     } 

     if (fingers > 0) 
      pointSwiped.Clear(); 
    } 


    int numberOfSwipedFingers(DirectionSwiped direction) 
    { 
     int count = 0; 
     foreach (var item in pointSwiped) 
     { 
      DirectionSwiped swipe = item.Value; 
      if (swipe == direction) 
      { 
       count += 1; 
      } 
     } 
     return count; 
    } 


} 

---

Kullanımı

public void Gesture_Detected(Object sender, SwipeEventArgs e) 
    { 
     Debug.WriteLine("Number of touches: " + e.NumberOfTouches + " Direction: " + e.Direction); 
    } 


    public MainPage() 
    { 
     this.InitializeComponent(); 

     SwipeGestureDetector gestureDetector = new SwipeGestureDetector(this.rootGrid); 
     gestureDetector.SwipeDetected += Gesture_Detected;