public MultiTouchProcessResult Process(MultiTouchPointerEventData eventData, Win10TouchInputModule module)
{
GestureData = GetGestureData(eventData);
int touchCount = eventData.touchCluster.Count;
if (touchCount < MinimumFingers || touchCount > MaximumFingers)
{
Reset(eventData);
return(MultiTouchProcessResult.NotProcessed); // Wrong touch count, don't check
}
if (touchCount != GestureData.PriorCluster.Count)
{
Reset(eventData);
}
bool anyEvent = false;
if (HasPriorData)
{
NormalizedPriorCluster.CopyFrom(GestureData.PriorCluster);
NormalizedPriorCluster.NormalizeForCentroidDelta(eventData.touchCluster);
EvaluateRelativeMotion(eventData);
anyEvent = CheckPan(eventData) || CheckRotate(eventData) || CheckPinch(eventData);
}
if (!HasPriorData || anyEvent)
{
GestureData.PriorCluster.CopyFrom(eventData.touchCluster);
}
return(anyEvent ? ResultIfEventSent : ResultIfTouchCountMatches);
}
private bool ProcessMultiTouchPress(MultiTouchPointerEventData pointerEvent, bool pressed, bool released)
{
var currentOverGo = pointerEvent.pointerCurrentRaycast.gameObject;
// PointerDown notification
if (pressed)
{
pointerEvent.singleTouchProcessingEnabled = true;
pointerEvent.eligibleForClick = true;
pointerEvent.delta = Vector2.zero;
pointerEvent.dragging = false;
pointerEvent.useDragThreshold = true;
pointerEvent.pressPosition = pointerEvent.position;
pointerEvent.pointerPressRaycast = pointerEvent.pointerCurrentRaycast;
// search for the control that will receive the multitouch events
pointerEvent.multitouchTarget = ExecuteEvents.GetEventHandler <IMultiTouchEventSystemHandler>(currentOverGo);
pointerEvent.rawPointerPress = currentOverGo;
}
// PointerUp notification
if (released)
{
ExecuteEvents.Execute(pointerEvent.multitouchTarget, pointerEvent, EndGestureHandlerDelegate);
pointerEvent.multitouchTarget = null;
}
return(pointerEvent.multitouchTarget != null);
}
protected bool GetMultiTouchPointerData(int id, out MultiTouchPointerEventData data, bool create)
{
PointerEventData temp;
if (m_PointerData.TryGetValue(id, out temp))
{
data = temp as MultiTouchPointerEventData;
if (data != null)
{
return(false); // good value, pre-existing
}
}
if (!create)
{
data = null;
return(false);
}
data = new MultiTouchPointerEventData(eventSystem)
{
pointerId = id,
};
m_PointerData[id] = data;
return(true);
}
public void CancelSingleTouchProcessing(MultiTouchPointerEventData pointer)
{
if (!pointer.singleTouchProcessingEnabled)
{
return;
}
pointer.singleTouchProcessingEnabled = false;
// Exit any hovered states
HandlePointerExitAndEnter(pointer, null);
pointer.eligibleForClick = false; // Not elegible for click
if (pointer.pointerPress)
{
// ReSharper disable once RedundantTypeArgumentsOfMethod
ExecuteEvents.Execute <IPointerUpHandler>(pointer.pointerPress, pointer, ExecuteEvents.pointerUpHandler);
pointer.pointerPress = null;
pointer.rawPointerPress = null;
}
if (pointer.pointerDrag != null && pointer.dragging)
{
// ReSharper disable once RedundantTypeArgumentsOfMethod
ExecuteEvents.Execute <IEndDragHandler>(pointer.pointerDrag, pointer, ExecuteEvents.endDragHandler);
pointer.pointerDrag = null;
pointer.dragging = false;
}
}
public void Reset(MultiTouchPointerEventData eventData)
{
if (IsGestureStarted)
{
SendEvent <IGestureEndHandler>(gameObject, eventData, GestureEndEvent, false);
}
GestureData.PriorCluster.Clear();
IsGestureStarted = false;
}
private bool SendEvent <TU>(GameObject target, MultiTouchPointerEventData eventData, ExecuteEvents.EventFunction <TU> handlerDelegate, bool sendBeginGestureIfNeeded)
where TU : IEventSystemHandler
{
eventData.EventSender = this;
if (!IsGestureStarted && sendBeginGestureIfNeeded)
{
ExecuteEvents.ExecuteHierarchy(target, eventData, (ExecuteEvents.EventFunction <IGestureStartHandler>)GestureStartEvent);
IsGestureStarted = true;
}
return(ExecuteEvents.ExecuteHierarchy(target, eventData, handlerDelegate) != null);
}
protected SimpleGestureData GetGestureData(MultiTouchPointerEventData eventData)
{
var simpleGestureData = (SimpleGestureData)eventData.GetGestureData(this);
if (simpleGestureData == null)
{
simpleGestureData = SimpleGestureData.Get();
eventData.SetGestureData(this, simpleGestureData);
}
return(simpleGestureData);
}
private void ClearPointerPressOrDrag(MultiTouchPointerEventData eventData)
{
if (!eventData.singleTouchProcessingEnabled)
{
return;
}
Win10TouchInputModule module;
if (Win10TouchInputModule.TryGetCurrentWin10TouchInputModule(out module))
{
module.CancelSingleTouchProcessing(eventData);
}
}
private bool CheckPan(MultiTouchPointerEventData eventData)
{
// In a pan, all of the touch points are moving in the same direction as the centroid,
// and none are moving significantly counter to it.
if (DetectPan && NumAntiCentroid == 0 && NumMatchCentroid >= eventData.touchCluster.Count)
{
if (ShouldStartDrag(eventData.centroidPressPosition, eventData.centroidPosition,
EventSystem.current.pixelDragThreshold, eventData.useDragThreshold))
{
ClearPointerPressOrDrag(eventData);
return(SendEvent <IPanHandler>(eventData.multitouchTarget, eventData, PanEvent, true));
}
}
return(false);
}
/// <summary>
/// Check for rotate. This would be all normalized touches moving the same clock direction
/// </summary>
/// <returns></returns>
private bool CheckRotate(MultiTouchPointerEventData eventData)
{
if (!DetectRotate)
{
return(false);
}
int countNeeded = eventData.touchCluster.Count - NumNearCenter;
if (countNeeded > 1 && (NumOffAxisCCW >= countNeeded || NumOffAxisCW >= countNeeded))
{
ClearPointerPressOrDrag(eventData);
return(SendEvent <IRotateHandler>(eventData.multitouchTarget, eventData, RotateEvent, true));
}
return(false);
}
/// <summary>
/// Check for a pinch. This would be all normalized touches moving more-or-less toward
/// or away from the centroid.
/// </summary>
/// <returns>true if event fired</returns>
private bool CheckPinch(MultiTouchPointerEventData eventData)
{
if (!DetectPinch)
{
return(false);
}
int countNeeded = eventData.touchCluster.Count - NumNearCenter;
if (countNeeded > 1 && (NumInward >= countNeeded || NumOutward >= countNeeded))
{
ClearPointerPressOrDrag(eventData);
return(SendEvent <IPinchHandler>(eventData.multitouchTarget, eventData, PinchEvent, true));
}
return(false);
}
private void LogMultiTouchEvent <T>(string eventName, MultiTouchPointerEventData eventData, T delta)
{
LogPointerEvent(eventName, eventData);
_eventDesc.AppendFormat("Centroid[pos {0}, delta {1}, pressed pos {2}] event delta {3}\n",
eventData.centroidPosition, eventData.centroidDelta, eventData.centroidPressPosition, delta);
}
public void OnPinch(SimpleGestures sender, MultiTouchPointerEventData eventData, Vector2 pinchDelta)
{
LogMultiTouchEvent("OnPinch", eventData, pinchDelta);
}
public void OnPan(SimpleGestures sender, MultiTouchPointerEventData eventData, Vector2 delta)
{
LogMultiTouchEvent("OnPan", eventData, delta);
}
public void OnRotate(SimpleGestures sender, MultiTouchPointerEventData eventData, float delta)
{
LogMultiTouchEvent("OnRotate", eventData, delta);
}
protected void EvaluateRelativeMotion(MultiTouchPointerEventData eventData)
{
NumInward = 0;
NumOutward = 0;
NumOffAxisCW = 0;
NumOffAxisCCW = 0;
NumMatchCentroid = 0;
NumAntiCentroid = 0;
NumNearCenter = 0;
DeltaPinch = Vector2.zero;
DeltaRotate = 0;
float clusterRadius = eventData.touchCluster.Radius;
Vector2 centroidDelta = eventData.centroidPosition - GestureData.PriorCluster.Centroid;
foreach (var entry in eventData.touchCluster.Touches)
{
TouchPt currentTouch = entry.Value;
TouchPt normalizedPriorTouch;
if (NormalizedPriorCluster.Touches.TryGetValue(entry.Key, out normalizedPriorTouch))
{
float dot;
Vector2 rawMove = currentTouch.position - GestureData.PriorCluster.Touches[currentTouch.fingerId].position;
if (rawMove.sqrMagnitude > 0.5f)
{
dot = Vector2.Dot(centroidDelta.normalized, rawMove.normalized);
if (Mathf.Abs(dot) >= (1.0f - DragTollerance))
{
NumMatchCentroid++;
}
else
{
NumAntiCentroid++;
}
}
Vector2 fromCentroid = eventData.touchCluster.GetRelativeTouchVector(entry.Key);
if (!Mathf.Approximately(clusterRadius, 0f))
{
if (fromCentroid.magnitude / clusterRadius < CloseToCenterRatio)
{
NumNearCenter++;
}
}
Vector2 delta = currentTouch.position - normalizedPriorTouch.position;
float deltaMagnitude = delta.magnitude;
dot = Vector2.Dot(fromCentroid.normalized, delta.normalized);
float absDot = Mathf.Abs(dot);
if (1.0f - absDot < PinchTollerance)
{
if (dot > 0)
{
NumOutward++;
DeltaPinch += delta.Abs();
}
else
{
NumInward++;
DeltaPinch -= delta.Abs();
}
}
else if (absDot < RotateTollerance)
{
float dotPerp = Vector2.Dot(fromCentroid.Perp(), delta);
if (dotPerp < 0)
{
NumOffAxisCW++;
DeltaRotate += deltaMagnitude / fromCentroid.magnitude;
}
else
{
NumOffAxisCCW++;
DeltaRotate -= deltaMagnitude / fromCentroid.magnitude;
}
}
}
}
if (NumOffAxisCCW > 0 || NumOffAxisCW > 0)
{
DeltaRotate = Mathf.Atan2(DeltaRotate, 1f) * Mathf.Rad2Deg;
if (DeltaRotate > 180f)
{
DeltaRotate -= 360f;
}
}
}
