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using System;
namespace Xamarin.Forms
{
public sealed class PinchGestureRecognizer : GestureRecognizer, IPinchGestureController
{
bool IPinchGestureController.IsPinching { get; set; }
void IPinchGestureController.SendPinch(Element sender, double delta, Point currentScalePoint)
{
EventHandler<PinchGestureUpdatedEventArgs> handler = PinchUpdated;
if (handler != null)
{
handler(sender, new PinchGestureUpdatedEventArgs(GestureStatus.Running, delta, currentScalePoint));
}
((IPinchGestureController)this).IsPinching = true;
}
void IPinchGestureController.SendPinchCanceled(Element sender)
{
EventHandler<PinchGestureUpdatedEventArgs> handler = PinchUpdated;
if (handler != null)
{
handler(sender, new PinchGestureUpdatedEventArgs(GestureStatus.Canceled));
}
((IPinchGestureController)this).IsPinching = false;
}
void IPinchGestureController.SendPinchEnded(Element sender)
{
EventHandler<PinchGestureUpdatedEventArgs> handler = PinchUpdated;
if (handler != null)
{
handler(sender, new PinchGestureUpdatedEventArgs(GestureStatus.Completed));
}
((IPinchGestureController)this).IsPinching = false;
}
void IPinchGestureController.SendPinchStarted(Element sender, Point initialScalePoint)
{
EventHandler<PinchGestureUpdatedEventArgs> handler = PinchUpdated;
if (handler != null)
{
handler(sender, new PinchGestureUpdatedEventArgs(GestureStatus.Started, 1, initialScalePoint));
}
((IPinchGestureController)this).IsPinching = true;
}
public event EventHandler<PinchGestureUpdatedEventArgs> PinchUpdated;
}
}
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