diff options
Diffstat (limited to 'Xamarin.Forms.Platform.Android/PanGestureHandler.cs')
-rw-r--r-- | Xamarin.Forms.Platform.Android/PanGestureHandler.cs | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/Xamarin.Forms.Platform.Android/PanGestureHandler.cs b/Xamarin.Forms.Platform.Android/PanGestureHandler.cs new file mode 100644 index 00000000..a552964c --- /dev/null +++ b/Xamarin.Forms.Platform.Android/PanGestureHandler.cs @@ -0,0 +1,69 @@ +using System; + +namespace Xamarin.Forms.Platform.Android +{ + internal class PanGestureHandler + { + readonly Func<double, double> _pixelTranslation; + + public PanGestureHandler(Func<View> getView, Func<double, double> pixelTranslation) + { + _pixelTranslation = pixelTranslation; + GetView = getView; + } + + Func<View> GetView { get; } + + public bool OnPan(float x, float y, int pointerCount) + { + View view = GetView(); + + if (view == null) + return false; + + var result = false; + foreach (PanGestureRecognizer panGesture in + view.GestureRecognizers.GetGesturesFor<PanGestureRecognizer>(g => g.TouchPoints == pointerCount)) + { + ((IPanGestureController)panGesture).SendPan(view, _pixelTranslation(x), _pixelTranslation(y), Application.Current.PanGestureId); + result = true; + } + + return result; + } + + public bool OnPanComplete() + { + View view = GetView(); + + if (view == null) + return false; + + var result = false; + foreach (PanGestureRecognizer panGesture in view.GestureRecognizers.GetGesturesFor<PanGestureRecognizer>()) + { + ((IPanGestureController)panGesture).SendPanCompleted(view, Application.Current.PanGestureId); + result = true; + } + Application.Current.PanGestureId++; + return result; + } + + public bool OnPanStarted(int pointerCount) + { + View view = GetView(); + + if (view == null) + return false; + + var result = false; + foreach (PanGestureRecognizer panGesture in + view.GestureRecognizers.GetGesturesFor<PanGestureRecognizer>(g => g.TouchPoints == pointerCount)) + { + ((IPanGestureController)panGesture).SendPanStarted(view, Application.Current.PanGestureId); + result = true; + } + return result; + } + } +}
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