public override bool OnTouchEvent(MotionEvent ev)
{
var hist = 0.0f;
var deltaY = 0.0f;
var listY = 0.0f;
_historyEvent = ev;
vT.AddMovement(ev);
if (_overscrolling)
{
var firstOverscroll = _firstOverscroll;
_firstOverscroll = false;
if (ev.Action == MotionEventActions.Move && ev.HistorySize >= 1)
{
hist = ev.GetHistoricalY(0, 0);
deltaY = ev.GetY() - hist;
listY = _listView.GetY();
if (_header != null)
{
var headerY = _header.GetY();
if (deltaY > 0)
{
if ((int)Math.Ceiling(headerY) == (0))
{
return _listView.DispatchTouchEvent(ev);
}
if (headerY + deltaY <= (0))
{
UpdateHeaderPosition(deltaY);
_listView.SetY(_listView.GetY() + deltaY);
_listView.LayoutParameters.Height = (int)Math.Ceiling(_listView.LayoutParameters.Height + deltaY);
_listView.Invalidate();
return true;
}
if (headerY + deltaY > 0)
{
deltaY = 0 - headerY;
UpdateHeaderPosition(0 - headerY);
_listView.SetY(_listView.GetY() + deltaY);
_listView.LayoutParameters.Height = (int)Math.Ceiling(_listView.LayoutParameters.Height + deltaY);
_listView.Invalidate();
return true;
}
}
if (deltaY < 0)
{
_overscrolling = false;
}
}
if (listY + deltaY <= 0)
{
deltaY = 0 - listY;
_overscrolling = false;
}
else if (deltaY > 0)
{
deltaY *= 0.4f;
}
Log.Info("OverScrollingIntercept", "{0}", deltaY);
_listView.SetY(_listView.GetY() + deltaY);
_lastHistory = ev.HistorySize;
}
else if (ev.Action == MotionEventActions.Up)
{
_overscrolling = false;
_lastHistory = 0;
_listView.Animate().Y(_header != null ? _header.Height : 0.0f).SetDuration(250).Start();
}
Log.Info("Interceptor", "Overscrolling True");
return true;
}
var hitRect = new Rect();
_header.GetHitRect(hitRect);
if (hitRect.Contains((int)Math.Ceiling(ev.GetX()), (int)Math.Ceiling(ev.GetY())))
{
return _header.DispatchTouchEvent(ev);
}
else
{
if (_header != null )
{
var headerY = _header.GetY();
if (ev.Action == MotionEventActions.Move && ev.HistorySize >= 1)
{
hist = ev.GetHistoricalY(0, 0);
deltaY = ev.GetY() - hist;
if (deltaY < 0)
{
if ((int) Math.Ceiling(headerY) == (0 - _header.Height))
{
return _listView.DispatchTouchEvent(ev);
}
if (headerY + deltaY >= (0 - _header.Height))
{
UpdateHeaderPosition(deltaY);
_listView.SetY(_listView.GetY()+deltaY);
_listView.LayoutParameters.Height = (int)Math.Ceiling(_listView.LayoutParameters.Height - deltaY);
_listView.RequestLayout();
return true;
}
else if (headerY + deltaY < (0 - _header.Height))
{
deltaY = 0 - ( headerY + _header.Height);
UpdateHeaderPosition(deltaY);
_listView.SetY(_listView.GetY() + deltaY);
_listView.LayoutParameters.Height = (int)Math.Ceiling(_listView.LayoutParameters.Height - deltaY);
_listView.RequestLayout();
_listView.DispatchTouchEvent(ev);
return true;
}
}
_listView.DispatchTouchEvent(ev);
return true;
}
else if(ev.Action == MotionEventActions.Up || ev.Action == MotionEventActions.Cancel)
{
vT.ComputeCurrentVelocity(1);
long duration = Math.Abs((long)Math.Ceiling(Math.Abs(_header.Height) / vT.GetYVelocity(0)));
if (duration < 750)
{
_header.Animate()
.Y(0 - _header.Height)
.SetDuration(duration)
.SetInterpolator(new DecelerateInterpolator(1.0f))
.Start();
_listView.Animate()
.Y(0)
.SetDuration(duration)
.SetInterpolator(new DecelerateInterpolator(1.0f))
.Start();
}
return _listView.DispatchTouchEvent(ev);
}
}
return _listView.DispatchTouchEvent(ev);
}
}
//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);
}
private void ApplyHeaderPadding(MotionEvent ev)
{
int pointerCount = ev.HistorySize;
for (int p = 0; p < pointerCount; p++)
{
if (mRefreshState == RELEASE_TO_REFRESH)
{
if (VerticalFadingEdgeEnabled)
VerticalScrollBarEnabled = false;
int historicalY = (int)ev.GetHistoricalY(p);
int topPadding = (int)(((historicalY - mLastMotionY)
- mRefreshViewHeight) / 1.7);
mRefreshView.SetPadding(
mRefreshView.PaddingLeft,
topPadding,
mRefreshView.PaddingRight,
mRefreshView.PaddingBottom);
}
}
}
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;
}