// TODO unify this with Android code
private void OnMouseButtonChange(object sender, MouseButtonEventArgs e)
{
double now = DateTime.Now.Ticks / TimeSpan.TicksPerMillisecond;
float xConversion = SparrowSharpApp.Stage.Width / Size.Width;
float yConversion = SparrowSharpApp.Stage.Height / Size.Height;
Touch touchInFocus;
if (e.Mouse.LeftButton == ButtonState.Pressed)
{
Touch newTouch = new Touch();
newTouch.TouchID = pointerId;
newTouch.TimeStamp = now;
newTouch.GlobalX = e.Mouse.X * xConversion;
newTouch.GlobalY = e.Mouse.Y * yConversion;
newTouch.InitialGlobalX = newTouch.GlobalX;
newTouch.InitialGlobalY = newTouch.GlobalY;
newTouch.Phase = TouchPhase.Began;
Point touchPosition = Point.Create(newTouch.GlobalX, newTouch.GlobalY);
newTouch.Target = SparrowSharpApp.Stage.HitTestPoint(touchPosition);
_touches.Add(newTouch.TouchID, newTouch);
}
else
{
touchInFocus = _touches[pointerId];
touchInFocus.Phase = TouchPhase.Ended;
long downTime = -1; // TODO
touchInFocus.TimeStamp = now;
double dist = Math.Sqrt(
(touchInFocus.GlobalX - touchInFocus.InitialGlobalX) * (touchInFocus.GlobalX - touchInFocus.InitialGlobalX) +
(touchInFocus.GlobalY - touchInFocus.InitialGlobalY) * (touchInFocus.GlobalY - touchInFocus.InitialGlobalY));
// TODO: move the time out to a constant, make dist DPI dependent
if (downTime < 300 && dist < 50)
{
touchInFocus.IsTap = true;
}
}
processTouch();
}
/// <summary>
/// This function handles touch events.
/// It is responsible for maintaining the currently active touch events and dispatching events.
/// For details see http://developer.android.com/reference/android/view/View.html#onTouchEvent(android.view.MotionEvent)
/// </summary>
override public bool OnTouchEvent(MotionEvent e)
{
float xConversion = SparrowSharpApp.Stage.Width / Size.Width;
float yConversion = SparrowSharpApp.Stage.Height / Size.Height;
// get pointer index from the event object
int pointerIndex = e.ActionIndex;
Touch touchInFocus;
// get pointer ID
int pointerId = e.GetPointerId(pointerIndex);
double now = DateTime.Now.Ticks / TimeSpan.TicksPerMillisecond;
// get masked (not specific to a pointer) action
MotionEventActions maskedAction = e.ActionMasked;
switch (maskedAction)
{
case MotionEventActions.Down:
case MotionEventActions.PointerDown:
// new pointer
Touch newTouch = new Touch();
newTouch.TouchID = pointerId;
newTouch.TimeStamp = now;
newTouch.GlobalX = e.GetX() * xConversion;
newTouch.GlobalY = e.GetY() * yConversion;
newTouch.InitialGlobalX = newTouch.GlobalX;
newTouch.InitialGlobalY = newTouch.GlobalY;
newTouch.Phase = TouchPhase.Began;
Point touchPosition = Point.Create(newTouch.GlobalX, newTouch.GlobalY);
newTouch.Target = SparrowSharpApp.Stage.HitTestPoint(touchPosition);
_touches.Add(newTouch.TouchID, newTouch);
break;
case MotionEventActions.Move:
for (int size = e.PointerCount, i = 0; i < size; i++)
{
Touch movedTouch;
_touches.TryGetValue(e.GetPointerId(i), out movedTouch);
if (movedTouch != null)
{
// TODO: should we care about historical pointer events?
movedTouch.PreviousGlobalX = movedTouch.GlobalX;
movedTouch.PreviousGlobalY = movedTouch.GlobalY;
movedTouch.TimeStamp = now;
float xc = e.GetX(i) * xConversion;
float yc = e.GetY(i) * yConversion;
if (movedTouch.GlobalX == xc && movedTouch.GlobalY == yc)
{
movedTouch.Phase = TouchPhase.Stationary;
}
else
{
movedTouch.GlobalX = xc;
movedTouch.GlobalY = yc;
movedTouch.Phase = TouchPhase.Moved;
}
if (movedTouch.Target == null || movedTouch.Target.Stage == null)
{
// target could have been removed from stage -> find new target in that case
Point updatedTouchPosition = Point.Create(movedTouch.GlobalX, movedTouch.GlobalY);
movedTouch.Target = SparrowSharpApp.Root.HitTestPoint(updatedTouchPosition);
}
}
}
break;
case MotionEventActions.Up:
case MotionEventActions.PointerUp:
touchInFocus = _touches[pointerId];
touchInFocus.Phase = TouchPhase.Ended;
long downTime = Android.OS.SystemClock.UptimeMillis() - e.DownTime;
touchInFocus.TimeStamp = now;
double dist = Math.Sqrt(
(touchInFocus.GlobalX - touchInFocus.InitialGlobalX) * (touchInFocus.GlobalX - touchInFocus.InitialGlobalX) +
(touchInFocus.GlobalY - touchInFocus.InitialGlobalY) * (touchInFocus.GlobalY - touchInFocus.InitialGlobalY));
// TODO: move the time out to a constant, make dist DPI dependent
if (downTime < 300 && dist < 50)
{
touchInFocus.IsTap = true;
}
break;
case MotionEventActions.Cancel:
touchInFocus = _touches[pointerId];
touchInFocus.Phase = TouchPhase.Cancelled;
break;
}
foreach (Touch tou in _touches.Values)
{
TouchEvent touchEvent = new TouchEvent(new List<Touch>(_touches.Values));
if (tou.Target != null)
{
tou.Target.InvokeTouch(touchEvent);
}
//Console.WriteLine ("phase:" + tou.Phase + " ID:" + tou.TouchID +
// " target:" + tou.Target + " isTap:"+ tou.IsTap + " timestamp:" + tou.TimeStamp);
}
var touchList = new List<Touch>(_touches.Values);
foreach (Touch tou in touchList)
{
if (tou.Phase == TouchPhase.Ended || tou.Phase == TouchPhase.Cancelled)
{
_touches.Remove(tou.TouchID);
}
}
return true;
}
void processTouches(UIEvent evt)
{
if (_lastTouchTimestamp != evt.Timestamp)
{
SizeF size = Bounds.Size;
float xConversion = SparrowSharpApp.Stage.Width / size.Width;
float yConversion = SparrowSharpApp.Stage.Height / size.Height;
// convert to Touches and forward to stage
List<Touch> touches = new List<Touch>();
double now = DateTime.Now.Ticks / TimeSpan.TicksPerMillisecond;
foreach (UITouch uiTouch in evt.TouchesForView(this))
{
PointF location = uiTouch.LocationInView(this);
PointF previousLocation = uiTouch.PreviousLocationInView(this);
Touch touch = new Touch();
touch.TouchID = uiTouch.Handle.ToInt32();
touch.TimeStamp = now;
touch.GlobalX = location.X * xConversion;
touch.GlobalY = location.Y * yConversion;
touch.PreviousGlobalX = previousLocation.X * xConversion;
touch.PreviousGlobalY = previousLocation.Y * yConversion;
if (uiTouch.Phase == UITouchPhase.Began)
{
touch.InitialGlobalX = touch.GlobalX;
touch.InitialGlobalY = touch.GlobalY;
}
touch.IsTap = (uiTouch.TapCount != 0);
touch.Phase = (TouchPhase) uiTouch.Phase;
touches.Add(touch);
}
_touchProcessor.ProcessTouches(touches);
_lastTouchTimestamp = evt.Timestamp;
}
}