void AddRotateGesture(EGestureType type)
{
_gestureLayer.SetRotateCallback(GestureLayer.GestureState.Start, (data) => { OnGestureStarted(type, data); });
_gestureLayer.SetRotateCallback(GestureLayer.GestureState.Move, (data) => { OnGestureMoved(type, data); });
_gestureLayer.SetRotateCallback(GestureLayer.GestureState.End, (data) => { OnGestureCompleted(type, data); });
_gestureLayer.SetRotateCallback(GestureLayer.GestureState.Abort, (data) => { OnGestureCanceled(type, data); });
}
void OnFlickStarted(EGestureType type, object data)
{
var lineData = (GestureLayer.LineData)data;
_horizontalSwipeTime = Convert.ToInt32(lineData.HorizontalSwipeTimestamp);
_verticalSwipeTime = Convert.ToInt32(lineData.VerticalSwipeTimestamp);
OnGestureStarted(type, data);
}
void AddLongTapGesture(EGestureType type, double timeout)
{
if (timeout > 0)
{
_gestureLayer.LongTapTimeout = timeout;
}
_gestureLayer.SetTapCallback(type, GestureLayer.GestureState.Start, (data) => { OnLongTapStarted(type, data); });
_gestureLayer.SetTapCallback(type, GestureLayer.GestureState.End, (data) => { OnLongTapCompleted(type, data); });
_gestureLayer.SetTapCallback(type, GestureLayer.GestureState.Abort, (data) => { OnGestureCanceled(type, data); });
}
void AddFlickGesture(EGestureType type, double timeout)
{
if (timeout > 0)
{
_gestureLayer.FlickTimeLimit = (int)(timeout * 1000);
}
_gestureLayer.SetFlickCallback(GestureLayer.GestureState.Start, (data) => { OnGestureStarted(type, data); });
_gestureLayer.SetFlickCallback(GestureLayer.GestureState.Move, (data) => { OnGestureMoved(type, data); });
_gestureLayer.SetFlickCallback(GestureLayer.GestureState.End, (data) => { OnGestureCompleted(type, data); });
_gestureLayer.SetFlickCallback(GestureLayer.GestureState.Abort, (data) => { OnGestureCanceled(type, data); });
}
void OnGestureCanceled(EGestureType type, object data)
{
var cache = _handlerCache;
if (cache.ContainsKey(type))
{
foreach (var handler in cache[type])
{
(handler as IGestureController)?.SendCanceled(View, data);
}
}
}
void AddDoubleTapGesture(EGestureType type, double timeout)
{
if (_gestureLayer == null)
{
return;
}
if (timeout > 0)
{
_gestureLayer.DoubleTapTimeout = timeout;
}
_gestureLayer.SetTapCallback(type, GestureLayer.GestureState.Start, (data) => { OnDoubleTapStarted(type, data); });
_gestureLayer.SetTapCallback(type, GestureLayer.GestureState.End, (data) => { OnDoubleTapCompleted(type, data); });
_gestureLayer.SetTapCallback(type, GestureLayer.GestureState.Abort, (data) => { OnGestureCanceled(type, data); });
}
void AddFlickGesture(EGestureType type, double timeout)
{
if (_gestureLayer == null)
{
return;
}
if (timeout > 0)
{
_gestureLayer.FlickTimeLimit = (int)(timeout * 1000);
}
// Task to correct wrong coordinates information when applying EvasMap(Xamarin ex: Translation, Scale, Rotate property)
// Always change to the absolute coordinates of the pointer.
int startX = 0;
int startY = 0;
_gestureLayer.SetFlickCallback(GestureLayer.GestureState.Start, (data) =>
{
startX = _gestureLayer.EvasCanvas.Pointer.X;
startY = _gestureLayer.EvasCanvas.Pointer.Y;
data.X1 = startX;
data.Y1 = startY;
OnGestureStarted(type, data);
});
_gestureLayer.SetFlickCallback(GestureLayer.GestureState.Move, (data) =>
{
data.X1 = startX;
data.Y1 = startY;
data.X2 = _gestureLayer.EvasCanvas.Pointer.X;
data.Y2 = _gestureLayer.EvasCanvas.Pointer.Y;
OnGestureMoved(type, data);
});
_gestureLayer.SetFlickCallback(GestureLayer.GestureState.End, (data) =>
{
data.X1 = startX;
data.Y1 = startY;
data.X2 = _gestureLayer.EvasCanvas.Pointer.X;
data.Y2 = _gestureLayer.EvasCanvas.Pointer.Y;
OnGestureCompleted(type, data);
});
_gestureLayer.SetFlickCallback(GestureLayer.GestureState.Abort, (data) => { OnGestureCanceled(type, data); });
}
void OnLongTapCompleted(EGestureType type, object data)
{
_longTapTime = ((GestureLayer.TapData)data).Timestamp - _longTapTime;
var cache = _handlerCache;
if (cache.ContainsKey(type))
{
foreach (var handler in cache[type])
{
if ((handler.Timeout * 1000) <= _longTapTime)
{
(handler as IGestureController)?.SendCompleted(View, data);
}
else
{
(handler as IGestureController)?.SendCanceled(View, data);
}
}
}
}
void AddMomentumGesture(EGestureType type)
{
// Task to correct wrong coordinates information when applying EvasMap(Xamarin ex: Translation, Scale, Rotate property)
// Always change to the absolute coordinates of the pointer.
int startX = 0;
int startY = 0;
_gestureLayer.SetMomentumCallback(GestureLayer.GestureState.Start, (data) =>
{
startX = _gestureLayer.EvasCanvas.Pointer.X;
startY = _gestureLayer.EvasCanvas.Pointer.Y;
OnGestureStarted(type, data);
});
_gestureLayer.SetMomentumCallback(GestureLayer.GestureState.Move, (data) =>
{
data.X1 = startX;
data.Y1 = startY;
data.X2 = _gestureLayer.EvasCanvas.Pointer.X;
data.Y2 = _gestureLayer.EvasCanvas.Pointer.Y;
OnGestureMoved(type, data);
});
_gestureLayer.SetMomentumCallback(GestureLayer.GestureState.End, (data) => { OnGestureCompleted(type, data); });
_gestureLayer.SetMomentumCallback(GestureLayer.GestureState.Abort, (data) => { OnGestureCanceled(type, data); });
}
void OnFlickCompleted(EGestureType type, object data)
{
var lineData = (GestureLayer.LineData)data;
_horizontalSwipeTime = Convert.ToInt32(lineData.HorizontalSwipeTimestamp - _horizontalSwipeTime);
_verticalSwipeTime = Convert.ToInt32(lineData.VerticalSwipeTimestamp - _verticalSwipeTime);
var cache = _handlerCache;
if (cache.ContainsKey(type))
{
foreach (var handler in cache[type])
{
if ((handler.Timeout * 1000) >= _horizontalSwipeTime ||
(handler.Timeout * 1000) >= _verticalSwipeTime)
{
(handler as IGestureController)?.SendCompleted(View, data);
}
else
{
(handler as IGestureController)?.SendCanceled(View, data);
}
}
}
}
void OnLongTapStarted(EGestureType type, object data)
{
_longTapTime = ((GestureLayer.TapData)data).Timestamp;
OnGestureStarted(type, data);
}
void RemoveTapGesture(EGestureType type)
{
_gestureLayer.SetTapCallback(type, GestureLayer.GestureState.Start, null);
_gestureLayer.SetTapCallback(type, GestureLayer.GestureState.End, null);
_gestureLayer.SetTapCallback(type, GestureLayer.GestureState.Abort, null);
}
void AddTapGesture(EGestureType type)
{
_gestureLayer.SetTapCallback(type, GestureLayer.GestureState.Start, (data) => { OnGestureStarted(type, data); });
_gestureLayer.SetTapCallback(type, GestureLayer.GestureState.End, (data) => { OnGestureCompleted(type, data); });
_gestureLayer.SetTapCallback(type, GestureLayer.GestureState.Abort, (data) => { OnGestureCanceled(type, data); });
}
void OnLongTapMoved(EGestureType type, object data)
{
OnGestureMoved(type, data);
}
internal static extern void elm_gesture_layer_cb_set(IntPtr obj, ElmSharp.GestureLayer.GestureType idx, ElmSharp.GestureLayer.GestureState cb_type, GestureEventCallback cb, IntPtr data);
