public override bool CheckConditions()
{
var leftThumb = GestureSystem.GetLimb(InteractionLimb.LeftThumbTip);
var leftIndex = GestureSystem.GetLimb(InteractionLimb.LeftIndexTip);
var rightThumb = GestureSystem.GetLimb(InteractionLimb.RightThumbTip);
var rightIndex = GestureSystem.GetLimb(InteractionLimb.RightIndexTip);
if (leftThumb == null || leftIndex == null || rightThumb == null || rightIndex == null)
{
return(IsGestureActive);
}
if (IsGestureActive)
{
// if the gesture is already active, we only need to check if the user is still pinching their fingers together
var isPinchingLeft = GestureUtil.IsInProximity(DeactivationDistance, new[] { leftThumb, leftIndex });
var isPinchingRight = GestureUtil.IsInProximity(DeactivationDistance, new[] { rightThumb, rightIndex });
if (isPinchingLeft && isPinchingRight)
{
// gesture still active
GesturePosLeft = GestureUtil.GetCenterPosition(new[] { leftThumb, leftIndex });
GesturePosRight = GestureUtil.GetCenterPosition(new[] { rightThumb, rightIndex });
GesturePosCenter = GestureUtil.GetCenterPosition(new[] { leftThumb, leftIndex, rightThumb, rightIndex });
RaiseGestureActiveEvent();
}
else
{
// one of the hands stopped pinching - stop gesture
IsGestureActive = false;
RaiseGestureStopEvent();
}
}
else
{
// gesture not active, so we'll check if the gesture is initiated
var isPinchingLeft = GestureUtil.CollidesWith(leftThumb, leftIndex);
var isPinchingRight = GestureUtil.CollidesWith(rightThumb, rightIndex);
var areHandsTogether = GestureUtil.IsInProximity(ActivationDistance, new[] { leftThumb, leftIndex, rightThumb, rightIndex });
if (isPinchingLeft && isPinchingRight && areHandsTogether)
{
IsGestureActive = true;
GesturePosLeft = GestureUtil.GetCenterPosition(new[] { leftThumb, leftIndex });
GesturePosRight = GestureUtil.GetCenterPosition(new[] { rightThumb, rightIndex });
GesturePosCenter = GestureUtil.GetCenterPosition(new[] { leftThumb, leftIndex, rightThumb, rightIndex });
RaiseGestureStartEvent();
}
}
return(IsGestureActive);
}
protected override void OnElementChanged(ElementChangedEventArgs <Frame> e)
{
base.OnElementChanged(e);
if (e.NewElement == null)
{
RemoveGestureRecognizer();
return;
}
var gestureView = e.NewElement as GestureAwareContentView;
_longPressGestureRecognizer = new UILongPressGestureRecognizer(
sender => {
var offset = sender.LocationInView(NativeView);
GestureUtil.ExecuteCommand(gestureView.LongPress,
new GestureOffset(sender.State.ToGestureState(), offset.X, offset.Y));
});
_pinchGestureRecognizer = new UIPinchGestureRecognizer(
sender => {
var scale = sender.Scale;
GestureUtil.ExecuteCommand(gestureView.Pinch,
new GestureScale(sender.State.ToGestureState(), scale));
});
_panGestureRecognizer = new UIPanGestureRecognizer(
sender => {
var offset = sender.TranslationInView(NativeView);
GestureUtil.ExecuteCommand(gestureView.Pan,
new GestureOffset(sender.State.ToGestureState(), offset.X, offset.Y));
});
_swipeGestureRecognizer = new UISwipeGestureRecognizer(
sender => {
var offset = sender.LocationInView(NativeView);
GestureUtil.ExecuteCommand(gestureView.Swipe,
new GestureOffset(sender.State.ToGestureState(), offset.X, offset.Y));
});
_rotationGestureRecognizer = new UIRotationGestureRecognizer(
sender => {
GestureUtil.ExecuteCommand(gestureView.Rotate);
});
AddGestureRecognizer(_longPressGestureRecognizer);
AddGestureRecognizer(_pinchGestureRecognizer);
AddGestureRecognizer(_panGestureRecognizer);
AddGestureRecognizer(_swipeGestureRecognizer);
AddGestureRecognizer(_rotationGestureRecognizer);
}
public void EndPickup(GestureEventArgs e)
{
if (pickedUpObject != null)
{
pickedUpObject.transform.position = transform.position + offset;
var body = pickedUpObject.GetComponent <Rigidbody>();
body.detectCollisions = true;
// apply last known velocity of gesture
var velocity = pickedUpObject.transform.position - GestureUtil.GetCenterPosition(lastGesturePositions);
body.AddForce(velocity * 60);
lastGesturePositions.Clear();
pickedUpObject = null;
}
}
private GestureStatus CheckStatus(GameObject thumb, GameObject index)
{
GestureStatus status;
if (GestureUtil.CollidesWith(thumb, index))
{
status = (IsGestureActive) ? GestureStatus.Active : GestureStatus.Starting;
}
else if (IsGestureActive)
{
// does not collide (anymore) but is still marked as active -> deactivate
status = GestureStatus.Stopping;
}
else
{
// doesn't collide, nor is it active -> inactive
status = GestureStatus.Inactive;
}
return(status);
}
public void FinishCreation(GestureEventArgs e)
{
var gesture = e.Sender as IPositionGesture;
if (gesture != null)
{
// turn on rigidbody on again
var body = CreatedInstance.GetComponent <Rigidbody>();
body.detectCollisions = true;
var pos = gesture.GetGesturePosition(Hand.Both);
CreatedInstance.transform.position = pos;
// apply last known velocity of gesture
var velocity = pos - GestureUtil.GetCenterPosition(lastGesturePositions);
body.AddForce(velocity * 60);
lastGesturePositions.Clear();
_createdInstances.Add(CreatedInstance);
CreatedInstance = null;
}
}
public void OnLongPress(MotionEvent e)
{
GestureUtil.ExecuteCommand(View.LongPress,
new GestureOffset(e.Action.ToGestureState(), e.GetX(), e.GetY()));
}
