// ---------------------------------------------------------
#region Private Methods
private void HandleTouchDown(Android.Views.MotionEvent e)
{
// Set values from settings
_currentPaint.Color = _formsView.PaintColor.ToAndroid();
_currentPaint.StrokeWidth = _formsView.LineWidth * _deviceDensity;
// Init storage for pointers and historical coords
_pointerIds = new List<int>();
_lastPointers = new List<PaintPointer>();
// Loop all pointers
for(int i = 0; i < e.PointerCount; i++)
{
// Get and store the pointer
var pointerId = e.GetPointerId(i);
_pointerIds.Add(pointerId);
// Get the pointer coords
var currentPoint = GetPointerCoords(e, pointerId);
// Store the coord in the historical list
_lastPointers.Add(new PaintPointer() { PointerId = pointerId, Coords = currentPoint });
// Draw the line
DrawLine(currentPoint, currentPoint);
}
}
public bool OnTouch( Android.Views.View v, Android.Views.MotionEvent e )
{
Android.Views.MotionEventActions action = e.Action;
if ( ( action & Android.Views.MotionEventActions.Mask ) != Android.Views.MotionEventActions.Move )
{
TouchPointer tec = new TouchPointer ();
switch ( action & Android.Views.MotionEventActions.Mask )
{
case Android.Views.MotionEventActions.Down:
tec = new TouchPointer ( new IntPtr ( e.GetPointerId ( 0 ) ), new Vector2 ( e.GetX (), e.GetY () ), PointerMode.Pressed );
break;
case Android.Views.MotionEventActions.PointerDown:
tec = new TouchPointer ( new IntPtr ( e.GetPointerId ( ( int ) ( action & Android.Views.MotionEventActions.PointerIdMask ) >> ( int ) Android.Views.MotionEventActions.PointerIdShift ) ),
new Vector2 ( e.GetX (), e.GetY () ), PointerMode.Pressed );
break;
case Android.Views.MotionEventActions.Up:
tec = new TouchPointer ( new IntPtr ( e.GetPointerId ( 0 ) ), new Vector2 ( e.GetX (), e.GetY () ), PointerMode.Released );
break;
case Android.Views.MotionEventActions.PointerUp:
tec = new TouchPointer ( new IntPtr ( e.GetPointerId ( ( int ) ( action & Android.Views.MotionEventActions.PointerIdMask ) >> ( int ) Android.Views.MotionEventActions.PointerIdShift ) ),
new Vector2 ( e.GetX (), e.GetY () ), PointerMode.Released );
break;
}
bool isChanged = false;
for ( int i = 0; i < touchPointers.Count; i++ )
{
if ( touchPointers [ i ].Id == tec.Id )
{
touchPointers [ i ] = tec;
isChanged = true;
break;
}
}
if ( !isChanged )
touchPointers.Add ( tec );
}
else if ( ( action & Android.Views.MotionEventActions.Mask ) == Android.Views.MotionEventActions.Move )
{
for ( int i = 0; i < e.PointerCount; i++ )
{
TouchPointer tec = new TouchPointer ( new IntPtr ( e.GetPointerId ( i ) ), new Vector2 ( e.GetX (), e.GetY () ), PointerMode.Moved );
touchPointers [ i ] = tec;
}
}
return true;
}
