protected virtual void OnTouchPointTouched(GestureTouchPoint gtp)
{
if (this.Vibrate && CrossVibrate.Current.CanVibrate)
{
CrossVibrate.Current.Vibration(TimeSpan.FromMilliseconds(100));
}
this.TouchPointTouched?.Invoke(this, new TouchPointTouchedEventArgs(gtp));
}
private bool TouchedTouchPoint(Point location, GestureTouchPoint touchPoint)
{
// Touch point touched?
if (location.X >= touchPoint.Location.X &&
location.X <= (touchPoint.Location.X + touchPoint.Width) &&
location.Y >= touchPoint.Location.Y &&
location.Y <= (touchPoint.Location.Y + touchPoint.Height))
{
return(true);
}
// Touch point touched by drawing line?
if (_fixedPoints.Any())
{
Point lineStartPoint = _fixedPoints.Last();
Point lineEndPoint = location;
return(this.PointOnLineSegment(lineStartPoint, lineEndPoint, touchPoint.Center, _tpRadius * 1.6));
}
return(false);
}
public TouchPointTouchedEventArgs(GestureTouchPoint gtp)
{
this.TouchPoint = gtp;
}
private void CanvasOnPaintSurface(object o, SKPaintSurfaceEventArgs e)
{
var canvas = e.Surface.Canvas;
canvas.Clear();
bool recreateTouchPoints = false;
if (_width != canvas.LocalClipBounds.Width || _heigth != canvas.LocalClipBounds.Height)
{
_width = canvas.LocalClipBounds.Width;
_heigth = canvas.LocalClipBounds.Height;
recreateTouchPoints = true;
}
var cellWidth = _width / this.HorizontalTouchPoints;
var cellHeight = _heigth / this.VerticalTouchPoints;
if (recreateTouchPoints)
{
_touchPoints.Clear();
for (int yAxisIndex = 0; yAxisIndex < this.VerticalTouchPoints; yAxisIndex++)
{
for (int xAxisIndex = 0; xAxisIndex < this.HorizontalTouchPoints; xAxisIndex++)
{
double x = (cellWidth / 8) + (cellWidth * xAxisIndex);
double y = (cellWidth / 8) + (cellHeight * yAxisIndex);
double centerX = x + (cellWidth / 2);
double centerY = y + (cellHeight / 2);
var gtp = new GestureTouchPoint()
{
Value = (_touchPoints.Count + 1).ToString(),
Width = cellWidth / 4,
Height = cellHeight / 4,
IsTouched = false,
Location = new Point(centerX - (cellWidth / 4), centerY - (cellHeight / 4))
};
_touchPoints.Add(gtp);
}
}
}
SKPaint skPaintTouchPoint = new SKPaint
{
Style = SKPaintStyle.StrokeAndFill,
Color = this.TouchPointColor.ToSKColor(),
StrokeWidth = this.TouchPointStrokeWidth
};
SKPaint skPaintTouchPointTouched = new SKPaint
{
Style = SKPaintStyle.Stroke,
Color = this.TouchPointHighlightColor.ToSKColor(),
StrokeWidth = this.TouchPointTouchedStrokeWidth
};
SKPaint skPaintTouchPointTouchedInnerCircle = new SKPaint
{
Style = SKPaintStyle.StrokeAndFill,
Color = this.LineDrawnColor.ToSKColor(),
StrokeWidth = this.TouchPointInnerCircleStrokeWidth
};
SKPaint skPaintLineDrawing = new SKPaint
{
Style = SKPaintStyle.Stroke,
Color = this.LineDrawingColor.ToSKColor(),
StrokeWidth = this.LineDrawingStrokeWidth
};
SKPaint skPaintLineDrawn = new SKPaint
{
Style = SKPaintStyle.Stroke,
Color = this.LineDrawnColor.ToSKColor(),
StrokeWidth = this.LineDrawnStrokeWidth
};
// Paint the touchpoints.
_tpRadius = ((cellHeight + cellWidth) / 2) * 0.05;
foreach (var touchPoint in _touchPoints)
{
// DEBUG: draw the touchpoint location
//canvas.DrawLine((float)touchPoint.Location.X, (float)touchPoint.Location.Y, (float)(touchPoint.Location.X + touchPoint.Width), (float)touchPoint.Location.Y, skPaintLineDrawing);
//canvas.DrawLine((float)touchPoint.Location.X, (float)touchPoint.Location.Y, (float)touchPoint.Location.X, (float)(touchPoint.Location.Y + touchPoint.Height), skPaintLineDrawing);
canvas.DrawCircle((float)touchPoint.Center.X, (float)touchPoint.Center.Y, (float)_tpRadius, skPaintTouchPoint);
}
// Any touched points?
if (_fixedPoints.Count == 0)
{
return;
}
// Paint the fixed points.
double tpInnerRadius = _tpRadius / 3;
double tpOuterRadius = _tpRadius * 3;
canvas.DrawCircle((float)_fixedPoints.First().X, (float)_fixedPoints.First().Y, (float)tpOuterRadius, skPaintTouchPointTouched);
canvas.DrawCircle((float)_fixedPoints.First().X, (float)_fixedPoints.First().Y, (float)tpInnerRadius, skPaintTouchPointTouchedInnerCircle);
for (int i = 1; i < _fixedPoints.Count; i++)
{
float xStart = (float)_fixedPoints[i - 1].X;
float yStart = (float)_fixedPoints[i - 1].Y;
float xEnd = (float)_fixedPoints[i].X;
float yEnd = (float)_fixedPoints[i].Y;
canvas.DrawLine(xStart, yStart, xEnd, yEnd, skPaintLineDrawn);
canvas.DrawCircle((float)_fixedPoints[i].X, (float)_fixedPoints[i].Y, (float)tpOuterRadius, skPaintTouchPointTouched);
canvas.DrawCircle((float)_fixedPoints[i].X, (float)_fixedPoints[i].Y, (float)tpInnerRadius, skPaintTouchPointTouchedInnerCircle);
}
// Paint the pending point.
if (_pendingPoint != Point.Zero)
{
float xStart = (float)_fixedPoints.Last().X;
float yStart = (float)_fixedPoints.Last().Y;
float xEnd = (float)_pendingPoint.X;
float yEnd = (float)_pendingPoint.Y;
canvas.DrawLine(xStart, yStart, xEnd, yEnd, skPaintLineDrawing);
}
}