//Iterate through the touch history since the last touch event and add them to the path and points list.
void handleTouch (MotionEvent e)
{
float touchX = e.GetX ();
float touchY = e.GetY ();
System.Drawing.PointF touch = new System.Drawing.PointF (touchX, touchY);
resetBounds (touchX, touchY);
for (var i = 0; i < e.HistorySize; i++) {
float historicalX = e.GetHistoricalX(i);
float historicalY = e.GetHistoricalY(i);
System.Drawing.PointF historical = new System.Drawing.PointF (historicalX, historicalY);
updateBounds (historicalX, historicalY);
currentPath.LineTo (historicalX, historicalY);
currentPoints.Add (historical);
}
currentPath.LineTo (touchX, touchY);
currentPoints.Add (touch);
}
public override bool OnTouchEvent(MotionEvent e)
{
if (e.Action == MotionEventActions.Down) {
CaptureMovementCheck (e);
return true;
}
if (!isTracking && !CaptureMovementCheck (e))
return true;
if (e.Action != MotionEventActions.Move || MoveDirectionTest (e))
velocityTracker.AddMovement (e);
if (e.Action == MotionEventActions.Move) {
var x = e.HistorySize > 0 ? e.GetHistoricalX (0) : e.GetX ();
var traveledDistance = (int)Math.Round (Math.Abs (x - (startX)));
SetNewOffset (stateBeforeTracking ?
MaxOffset - Math.Min (MaxOffset, traveledDistance)
: Math.Max (0, traveledDistance));
} else if (e.Action == MotionEventActions.Up
&& stateBeforeTracking == opened) {
velocityTracker.ComputeCurrentVelocity (1000, maxFlingVelocity);
if (Math.Abs (velocityTracker.XVelocity) > minFlingVelocity)
SetOpened (!opened);
else if (!opened && contentOffsetX > MaxOffset / 2)
SetOpened (true);
else if (opened && contentOffsetX < MaxOffset / 2)
SetOpened (false);
else
SetOpened (opened);
preTracking = isTracking = false;
}
return true;
}
public override bool OnTouchEvent(MotionEvent ev)
{
float x = ev.GetX();
float y = ev.GetY();
switch (ev.Action)
{
case MotionEventActions.Down:
touch_start(x, y);
Invalidate();
break;
case MotionEventActions.Move:
for (int i = 0, n = ev.HistorySize; i < n; i++)
{
touch_move(ev.GetHistoricalX(i), ev.GetHistoricalY(i));
}
touch_move(x, y);
Invalidate();
break;
case MotionEventActions.Up:
touch_up(x, y);
Invalidate();
break;
}
return true;
}
bool OnTouchOrHoverEvent (MotionEvent e, bool isTouch)
{
MotionEventButtonState buttonState = e.ButtonState;
MotionEventButtonState pressedButtons = buttonState & ~mOldButtonState;
mOldButtonState = buttonState;
if ((pressedButtons & MotionEventButtonState.Secondary) != 0) {
// Advance color when the right mouse button or first stylus button
// is pressed.
AdvanceColor ();
}
PaintMode mode;
if ((buttonState & MotionEventButtonState.Tertiary) != 0) {
// Splat paint when the middle mouse button or second stylus button is pressed.
mode = PaintMode.Splat;
} else if (isTouch || (buttonState & MotionEventButtonState.Primary) != 0) {
// Draw paint when touching or if the primary button is pressed.
mode = PaintMode.Draw;
} else {
// Otherwise, do not paint anything.
return false;
}
MotionEventActions action = e.ActionMasked;
if (action == MotionEventActions.Down || action == MotionEventActions.Move
|| action == MotionEventActions.HoverMove) {
int N = e.HistorySize;
int P = e.PointerCount;
for (int i = 0; i < N; i++) {
for (int j = 0; j < P; j++) {
Paint (GetPaintModeForTool (e.GetToolType (j), mode),
e.GetHistoricalX (j, i),
e.GetHistoricalY(j, i),
e.GetHistoricalPressure (j, i),
e.GetHistoricalTouchMajor (j, i),
e.GetHistoricalTouchMinor (j, i),
e.GetHistoricalOrientation (j, i),
e.GetHistoricalAxisValue (Axis.Distance, j, i),
e.GetHistoricalAxisValue (Axis.Tilt, j, i));
}
}
for (int j = 0; j < P; j++) {
Paint (GetPaintModeForTool (e.GetToolType (j), mode),
e.GetX (j),
e.GetY (j),
e.GetPressure (j),
e.GetTouchMajor (j),
e.GetTouchMinor (j),
e.GetOrientation (j),
e.GetAxisValue (Axis.Distance, j),
e.GetAxisValue (Axis.Tilt, j));
}
mCurX = e.GetX ();
mCurY = e.GetY ();
}
return true;
}
public override bool OnTrackballEvent (MotionEvent e)
{
MotionEventActions action = e.ActionMasked;
if (action == MotionEventActions.Down) {
// Advance color when the trackball button is pressed.
AdvanceColor ();
}
if (action == MotionEventActions.Down || action == MotionEventActions.Move) {
int N = e.HistorySize;
float scaleX = e.XPrecision * TRACKBALL_SCALE;
float scaleY = e.YPrecision * TRACKBALL_SCALE;
for (int i = 0; i < N; i++) {
MoveTrackball (e.GetHistoricalX (i) * scaleX,
e.GetHistoricalY (i) * scaleY);
}
MoveTrackball (e.GetX () * scaleX, e.GetY () * scaleY);
}
return true;
}
public override bool OnTouchEvent (MotionEvent e) {
var spos = new Vector2 (e.GetX (), _size.Y - e.GetY ());
var pos = this.NormalizeToViewport (spos);
switch (e.Action) {
case MotionEventActions.Down:
_queue.Enqueue (new Touch (TouchState.Start, pos, spos));
break;
case MotionEventActions.Up:
_queue.Enqueue (new Touch (TouchState.End, pos, spos));
break;
case MotionEventActions.Move:
for (var i = 0; i < e.HistorySize; i++) {
var shpos = new Vector2 (e.GetHistoricalX (i), _size.Y - e.GetHistoricalY (i));
var hpos = this.NormalizeToViewport (shpos);
_queue.Enqueue (new Touch (TouchState.Move, hpos, shpos));
}
_queue.Enqueue (new Touch (TouchState.Move, pos, spos));
break;
case MotionEventActions.Cancel:
_queue.Enqueue (new Touch (TouchState.Cancel, pos, spos));
break;
default:
break;
}
if (_gestureDetector != null)
_gestureDetector.OnTouchEvent (e);
return true;
}
