void OnDown(GestureMotionEvent e)
{
//TODO - really should be possible at this point - min distance should trigger began
State = GestureRecognizerState.Possible;
PointerId = e.GetPointerId(0);
Console.WriteLine("PAN POSSIBLE");
_rawTranslation = new Xamarin.Forms.Point(0, 0);
_currentPoint = new Xamarin.Forms.Point(e.GetX(), e.GetY());
_currentScreenPoint = new Xamarin.Forms.Point(e.GetX(), e.GetY());
_previousPoint = new Xamarin.Forms.Point(e.GetX(), e.GetY());
_startPoint = new Xamarin.Forms.Point(NativeView.GetX(), NativeView.GetY());
SendGestureEvent();
}
void OnUp(GestureMotionEvent e)
{
NumberOfTouches = e.PointerCount;
var tookTooLong = (DateTime.Now - _startTime).Milliseconds > MaxSwipeDuration;
var wrongAmountOfTouches = NumberOfTouches < SwipeGestureRecognizer.NumberOfTouchesRequired;
if (tookTooLong || wrongAmountOfTouches)
{
State = GestureRecognizerState.Failed;
SendGestureEvent();
PointerId = -1;
return;
}
var endTouchPoint = new Xamarin.Forms.Point(e.GetX(0), e.GetY(0));
double velocityX = endTouchPoint.X - FirstTouchPoint.X;
double velocityY = endTouchPoint.Y - FirstTouchPoint.Y;
var direction = GetSwipeDirection(velocityX, velocityY);
var expectedDirection = (Recognizer as SwipeGestureRecognizer).Direction;
if (direction == expectedDirection)
{
State = GestureRecognizerState.Recognized;
SendGestureEvent();
}
else
{
State = GestureRecognizerState.Failed;
Console.WriteLine("failed gesture was expecting {0} got {1}", expectedDirection, direction);
}
PointerId = -1;
}
internal override void ProcessMotionEvent(GestureMotionEvent e)
{
if (e.ActionMasked == MotionEventActions.Down && PointerId == -1)
{
OnDown(e);
e.IsConsumed = true;
e.IsCancelled = Recognizer.CancelsTouchesInView;
}
else if (State == GestureRecognizerState.Cancelled || State == GestureRecognizerState.Ended || State == GestureRecognizerState.Failed)
{
return;
}
else
{
var xMovement = Math.Abs(e.GetX(0) - FirstTouchPoint.X);
var yMovement = Math.Abs(e.GetY(0) - FirstTouchPoint.Y);
var isMovedBeyondMaxDistance = xMovement > LongPressGestureRecognizer.MaxDistanceTolerance || yMovement > LongPressGestureRecognizer.MaxDistanceTolerance;
Console.WriteLine("isMovedBeyondMaxDistance {0} xd {1} yd{2}", isMovedBeyondMaxDistance, xMovement, yMovement);
if (e.ActionMasked == MotionEventActions.Cancel || isMovedBeyondMaxDistance)
{
State = GestureRecognizerState.Cancelled;
Console.WriteLine("LONG PRESS CANCELLED");
PointerId = -1;
SendGestureUpdate();
}
else if (e.ActionMasked == MotionEventActions.Up)
{
OnUp(e);
e.IsConsumed = true;
}
}
}
void OnDown(GestureMotionEvent e)
{
//TODO - should really be possible until all taps/fingers are satisfied.
State = GestureRecognizerState.Began;
// State = (e.PointerCount == SwipeGestureRecognizer.NumberOfTouchesRequired) ? GestureRecognizerState.Began : GestureRecognizerState.Failed;
FirstTouchPoint = new Xamarin.Forms.Point(e.GetX(0), e.GetY(0));
_startTime = DateTime.Now;
}
void OnDown (GestureMotionEvent e)
{
//TODO - should really be possible until all taps/fingers are satisfied.
State = GestureRecognizerState.Began;
// State = (e.PointerCount == SwipeGestureRecognizer.NumberOfTouchesRequired) ? GestureRecognizerState.Began : GestureRecognizerState.Failed;
FirstTouchPoint = new Xamarin.Forms.Point (e.GetX (0), e.GetY (0));
_startTime = DateTime.Now;
}
void OnDown (GestureMotionEvent e)
{
//TODO - should really be possible until all taps/fingers are satisfied.
State = (e.PointerCount == TapGestureRecognizer.NumberOfTouchesRequired) ? GestureRecognizerState.Began : GestureRecognizerState.Failed;
_currentTapCount = 0;
//TODO track all pointers that are down.
PointerId = e.GetPointerId (0);
FirstTouchPoint = new Xamarin.Forms.Point (e.GetX (0), e.GetY (0));
if (TapGestureRecognizer.NumberOfTapsRequired > 1 && State == GestureRecognizerState.Began) {
ResetMultiTapTimer (true);
}
}
void OnDown (GestureMotionEvent e)
{
//TODO - should really be possible until all taps/fingers are satisfied.
if (e.PointerCount == LongPressGestureRecognizer.NumberOfTouchesRequired) {
State = GestureRecognizerState.Began;
PointerId = e.GetPointerId (0);
FirstTouchPoint = new Xamarin.Forms.Point (e.GetX (0), e.GetY (0));
ResetLongPressTimer (true);
} else {
State = GestureRecognizerState.Failed;
}
}
void OnDown(GestureMotionEvent e)
{
//TODO - should really be possible until all taps/fingers are satisfied.
State = (e.PointerCount == TapGestureRecognizer.NumberOfTouchesRequired) ? GestureRecognizerState.Began : GestureRecognizerState.Failed;
_currentTapCount = 0;
//TODO track all pointers that are down.
PointerId = e.GetPointerId(0);
FirstTouchPoint = new Xamarin.Forms.Point(e.GetX(0), e.GetY(0));
if (TapGestureRecognizer.NumberOfTapsRequired > 1 && State == GestureRecognizerState.Began)
{
ResetMultiTapTimer(true);
}
}
bool OnMove(GestureMotionEvent e)
{
_currentScreenPoint = new Xamarin.Forms.Point(e.GetX(), e.GetY());
var currentViewPosition = new Xamarin.Forms.Point(NativeView.GetX(), NativeView.GetY());
var currentViewOffset = new Xamarin.Forms.Point(currentViewPosition.X - _startPoint.X, currentViewPosition.Y - _startPoint.Y);
var eventPoint = new Xamarin.Forms.Point(e.GetX() + currentViewOffset.X, e.GetY() + currentViewOffset.Y);
var coords = new MotionEvent.PointerCoords();
e.GetPointerCoords(0, coords);
// Console.WriteLine ("CHANGED e2{0} coords {1},{2}", eventPoint, coords.X, coords.Y);
if (State != GestureRecognizerState.Possible && State != GestureRecognizerState.Began && State != GestureRecognizerState.Changed)
{
return(false);
}
if (e.GetX() < 0 || e.GetX() > NativeView.Width || e.GetY() < 0 || e.GetY() > NativeView.Height)
{
Console.WriteLine("Gesture exited from view - it's over");
State = GestureRecognizerState.Ended;
PointerId = -1;
SendGestureEvent();
return(false);
}
if (e.ActionMasked == MotionEventActions.Move || e.ActionMasked == MotionEventActions.Scroll)
{
_previousPoint = _currentPoint;
_currentPoint = eventPoint;
_velocity = new Xamarin.Forms.Point(_currentPoint.X - _previousPoint.X, _currentPoint.Y - _previousPoint.Y);
//TODO proper conversion
_rawTranslation.X += _velocity.X / 2;
_rawTranslation.Y += _velocity.Y / 2;
State = State == GestureRecognizerState.Possible ? GestureRecognizerState.Began : GestureRecognizerState.Changed;
e.IsCancelled = Recognizer.CancelsTouchesInView;
}
// Console.WriteLine ("State " + State + "_previousPoint " + _previousPoint + " _currentPoint" + _currentPoint);
SendGestureEvent();
return(false);
}
void OnDown(GestureMotionEvent e)
{
//TODO - should really be possible until all taps/fingers are satisfied.
if (e.PointerCount == LongPressGestureRecognizer.NumberOfTouchesRequired)
{
State = GestureRecognizerState.Began;
PointerId = e.GetPointerId(0);
FirstTouchPoint = new Xamarin.Forms.Point(e.GetX(0), e.GetY(0));
ResetLongPressTimer(true);
}
else
{
State = GestureRecognizerState.Failed;
}
}
void OnUp (GestureMotionEvent e)
{
NumberOfTouches = e.PointerCount;
var tookTooLong = (DateTime.Now - _startTime).Milliseconds > MaxSwipeDuration;
var wrongAmountOfTouches = NumberOfTouches < SwipeGestureRecognizer.NumberOfTouchesRequired;
if (tookTooLong || wrongAmountOfTouches) {
State = GestureRecognizerState.Failed;
return;
}
var endTouchPoint = new Xamarin.Forms.Point (e.GetX (0), e.GetY (0));
double velocityX = endTouchPoint.X - FirstTouchPoint.X;
double velocityY = endTouchPoint.Y - FirstTouchPoint.Y;
var direction = GetSwipeDirection (velocityX, velocityY);
var expectedDirection = (Recognizer as SwipeGestureRecognizer).Direction;
if (direction == expectedDirection) {
State = GestureRecognizerState.Recognized;
} else {
State = GestureRecognizerState.Failed;
Console.WriteLine ("failed gesture was expecting {0} got {1}", expectedDirection, direction);
}
}
internal override void ProcessMotionEvent (GestureMotionEvent e)
{
if (e.ActionMasked == MotionEventActions.Down && PointerId == -1) {
OnDown (e);
// e.IsConsumed = true;
e.IsCancelled = Recognizer.CancelsTouchesInView;
} else if (State == GestureRecognizerState.Cancelled || State == GestureRecognizerState.Ended || State == GestureRecognizerState.Failed) {
return;
} else {
var xMovement = Math.Abs (e.GetX (0) - FirstTouchPoint.X);
var yMovement = Math.Abs (e.GetY (0) - FirstTouchPoint.Y);
var isMovedBeyondMaxDistance = xMovement > LongPressGestureRecognizer.MaxDistanceTolerance || yMovement > LongPressGestureRecognizer.MaxDistanceTolerance;
Console.WriteLine ("isMovedBeyondMaxDistance {0} xd {1} yd{2}", isMovedBeyondMaxDistance, xMovement, yMovement);
if (e.ActionMasked == MotionEventActions.Cancel || isMovedBeyondMaxDistance) {
State = GestureRecognizerState.Cancelled;
Console.WriteLine ("LONG PRESS CANCELLED");
} else if (e.ActionMasked == MotionEventActions.Up) {
OnUp (e);
// e.IsConsumed = true;
}
}
}
void OnMove(GestureMotionEvent e)
{
_currentScreenPoint = new Xamarin.Forms.Point(e.GetX(), e.GetY());
var currentViewPosition = Recognizer.View.GetNativeScreenPosition();
var currentViewOffset = new Xamarin.Forms.Point(currentViewPosition.X - _viewStartLocation.X, currentViewPosition.Y - _viewStartLocation.Y);
var eventPoint = new Xamarin.Forms.Point(e.GetX() + currentViewOffset.X, e.GetY() + currentViewOffset.Y);
// Console.WriteLine ("ePoint {0} cvp {1} voffset {2} csp {3}", eventPoint.PrettyPrint (), currentViewPosition.PrettyPrint (), currentViewOffset.PrettyPrint (), _currentScreenPoint.PrettyPrint ());
if (State == GestureRecognizerState.Possible || State == GestureRecognizerState.Began || State == GestureRecognizerState.Changed)
{
//
// if (e.GetX () < 0 || e.GetX () > NativeView.Width || e.GetY () < 0 || e.GetY () > NativeView.Height) {
// Console.WriteLine ("Gesture exited from view - it's over");
// State = GestureRecognizerState.Ended;
// } else
if (e.ActionMasked == MotionEventActions.Move || e.ActionMasked == MotionEventActions.Scroll)
{
_previousPoint = _currentPoint;
_currentPoint = eventPoint;
_velocity = new Xamarin.Forms.Point(_currentPoint.X - _previousPoint.X, _currentPoint.Y - _previousPoint.Y);
if (State == GestureRecognizerState.Possible && !IsMoveSufficientToBegin(_currentScreenPoint))
{
Console.WriteLine("not moved enough - not starting");
return;
}
//TODO proper conversion
_rawTranslation.X += _velocity.X / 2;
_rawTranslation.Y += _velocity.Y / 2;
State = State == GestureRecognizerState.Possible ? GestureRecognizerState.Began : GestureRecognizerState.Changed;
e.IsCancelled = Recognizer.CancelsTouchesInView;
}
// Console.WriteLine ("State " + State + "_previousPoint " + _previousPoint.PrettyPrint () + " _currentPoint" + _currentPoint.PrettyPrint () + "rt " + _rawTranslation.PrettyPrint ());
}
}
void OnDown (GestureMotionEvent e)
{
//TODO - really should be possible at this point - min distance should trigger began
State = GestureRecognizerState.Possible;
PointerId = e.GetPointerId (0);
Console.WriteLine ("PAN POSSIBLE");
_rawTranslation = new Xamarin.Forms.Point (0, 0);
FirstTouchPoint = new Xamarin.Forms.Point (e.GetX (), e.GetY ());
_currentPoint = FirstTouchPoint;
_currentScreenPoint = FirstTouchPoint;
_previousPoint = FirstTouchPoint;
_viewStartLocation = Recognizer.View.GetNativeScreenPosition ();
}
void OnMove (GestureMotionEvent e)
{
_currentScreenPoint = new Xamarin.Forms.Point (e.GetX (), e.GetY ());
var currentViewPosition = Recognizer.View.GetNativeScreenPosition ();
var currentViewOffset = new Xamarin.Forms.Point (currentViewPosition.X - _viewStartLocation.X, currentViewPosition.Y - _viewStartLocation.Y);
var eventPoint = new Xamarin.Forms.Point (e.GetX () + currentViewOffset.X, e.GetY () + currentViewOffset.Y);
// Console.WriteLine ("ePoint {0} cvp {1} voffset {2} csp {3}", eventPoint.PrettyPrint (), currentViewPosition.PrettyPrint (), currentViewOffset.PrettyPrint (), _currentScreenPoint.PrettyPrint ());
if (State == GestureRecognizerState.Possible || State == GestureRecognizerState.Began || State == GestureRecognizerState.Changed) {
//
// if (e.GetX () < 0 || e.GetX () > NativeView.Width || e.GetY () < 0 || e.GetY () > NativeView.Height) {
// Console.WriteLine ("Gesture exited from view - it's over");
// State = GestureRecognizerState.Ended;
// } else
if (e.ActionMasked == MotionEventActions.Move || e.ActionMasked == MotionEventActions.Scroll) {
_previousPoint = _currentPoint;
_currentPoint = eventPoint;
_velocity = new Xamarin.Forms.Point (_currentPoint.X - _previousPoint.X, _currentPoint.Y - _previousPoint.Y);
if (State == GestureRecognizerState.Possible && !IsMoveSufficientToBegin (_currentScreenPoint)) {
Console.WriteLine ("not moved enough - not starting");
return;
}
//TODO proper conversion
_rawTranslation.X += _velocity.X / 2;
_rawTranslation.Y += _velocity.Y / 2;
State = State == GestureRecognizerState.Possible ? GestureRecognizerState.Began : GestureRecognizerState.Changed;
e.IsCancelled = Recognizer.CancelsTouchesInView;
}
// Console.WriteLine ("State " + State + "_previousPoint " + _previousPoint.PrettyPrint () + " _currentPoint" + _currentPoint.PrettyPrint () + "rt " + _rawTranslation.PrettyPrint ());
}
}
