private static PathGeometry Convert(string data)
{
var result = new PathGeometry();
var pathData = PathDataParser.ToAbsolute(PathDataParser.Parse(data));
var currentFigure = new PathFigure();
foreach (var cmd in pathData)
{
switch (cmd.Type)
{
case PathDataParser.CommandType.MoveTo:
if (currentFigure != null)
{
result.Figures.Add(currentFigure);
}
currentFigure = new PathFigure()
{
StartPoint = new Point(cmd.Arguments[0], cmd.Arguments[1])
};
break;
case PathDataParser.CommandType.LineTo:
var lineSegment = new LineSegment {
Point = new Point(cmd.Arguments[0], cmd.Arguments[1])
};
currentFigure.Segments.Add(lineSegment);
break;
case PathDataParser.CommandType.Bezier:
{
var bizierSegment = new BezierSegment
{
Point1 = new Point(cmd.Arguments[0], cmd.Arguments[1]),
Point2 = new Point(cmd.Arguments[2], cmd.Arguments[3]),
Point3 = new Point(cmd.Arguments[4], cmd.Arguments[5])
};
currentFigure.Segments.Add(bizierSegment);
}
break;
case PathDataParser.CommandType.Close:
currentFigure.IsClosed = true;
result.Figures.Add(currentFigure);
currentFigure = new PathFigure();
break;
}
}
result.Figures.Add(currentFigure);
return(result);
}
protected override void OnDraw(Canvas canvas)
{
var rect = new Rect();
this.GetDrawingRect(rect);
var path = new Android.Graphics.Path();
var lastPoint = new PointF();
foreach (var command in PathDataParser.Parse(Element.Data))
{
switch (command.Type)
{
case PathDataParser.CommandType.MoveTo:
lastPoint = new PointF(command.Arguments[0], command.Arguments[1]);
path.MoveTo(lastPoint.X, lastPoint.Y);
break;
case PathDataParser.CommandType.LineTo:
lastPoint = new PointF(command.Arguments[0], command.Arguments[1]);
path.LineTo(lastPoint.X, lastPoint.Y);
break;
case PathDataParser.CommandType.LineHor:
lastPoint = new PointF(command.Arguments[0], lastPoint.Y);
path.LineTo(lastPoint.X, lastPoint.Y);
break;
case PathDataParser.CommandType.LineVer:
lastPoint = new PointF(lastPoint.X, command.Arguments[0]);
path.LineTo(lastPoint.X, lastPoint.Y);
break;
case PathDataParser.CommandType.RelativeLineHor:
lastPoint = new PointF(command.Arguments[0] + lastPoint.X, lastPoint.Y);
path.LineTo(lastPoint.X, lastPoint.Y);
break;
case PathDataParser.CommandType.RelativeLineVer:
lastPoint = new PointF(lastPoint.X, lastPoint.Y + command.Arguments[0]);
path.LineTo(lastPoint.X, lastPoint.Y);
break;
case PathDataParser.CommandType.RelativeLineTo:
lastPoint = new PointF(lastPoint.X + command.Arguments[0], lastPoint.Y + command.Arguments[1]);
path.LineTo(lastPoint.X, lastPoint.Y);
break;
case PathDataParser.CommandType.RelativeMoveTo:
lastPoint = new PointF(lastPoint.X + command.Arguments[0], lastPoint.Y + command.Arguments[1]);
path.MoveTo(lastPoint.X, lastPoint.Y);
break;
case PathDataParser.CommandType.QBezier:
path.QuadTo(command.Arguments[0], command.Arguments[1],
command.Arguments[2], command.Arguments[3]);
lastPoint = new PointF(command.Arguments[2], command.Arguments[3]);
break;
case PathDataParser.CommandType.Bezier:
path.CubicTo(
command.Arguments[0], command.Arguments[1],
command.Arguments[2], command.Arguments[3],
command.Arguments[4], command.Arguments[5]);
lastPoint = new PointF(command.Arguments[4], command.Arguments[5]);
break;
case PathDataParser.CommandType.RelativeBezier:
var p1 = new PointF(lastPoint.X + command.Arguments[0], lastPoint.Y + command.Arguments[1]);
var p2 = new PointF(p1.X + command.Arguments[2], p1.Y + command.Arguments[3]);
lastPoint = new PointF(p2.X + command.Arguments[4], p2.Y + command.Arguments[5]);
path.CubicTo(p1.X, p1.Y, p2.X, p2.Y, lastPoint.X, lastPoint.Y);
break;
case PathDataParser.CommandType.Close:
path.Close();
break;
}
}
var paint = new Paint(PaintFlags.AntiAlias);
paint.StrokeWidth = Element.StrokeThickness;
paint.StrokeMiter = 10f;
canvas.Save();
paint.SetStyle(Paint.Style.Stroke);
paint.Color = Element.Stroke.ToAndroid();
canvas.DrawPath(path, paint);
canvas.Restore();
}
public string ParseToAbsolute(string data) => PathDataParser.ToString(PathDataParser.ToAbsolute(PathDataParser.Parse(data)));
public string ParseAndToString(string data) => PathDataParser.ToString(PathDataParser.Parse(data));
protected override void OnDraw(Canvas canvas)
{
var trans = Element.RenderTransform ?? new IdentityTransform();
var path = new global::Android.Graphics.Path();
foreach (var command in PathDataParser.ToAbsolute(PathDataParser.Parse(Element.Data)))
{
switch (command.Type)
{
case PathDataParser.CommandType.MoveTo:
{
var pt = trans.TransformPoint(
new System.Drawing.PointF(command.Arguments[0], command.Arguments[1]));
path.MoveTo(pt.X, pt.Y);
}
break;
case PathDataParser.CommandType.LineTo:
{
var pt = trans.TransformPoint(
new System.Drawing.PointF(command.Arguments[0], command.Arguments[1]));
path.LineTo(pt.X, pt.Y);
}
break;
case PathDataParser.CommandType.QBezier:
{
var pt = trans.TransformPoint(
new System.Drawing.PointF(command.Arguments[0], command.Arguments[1]));
var pt2 = trans.TransformPoint(
new System.Drawing.PointF(command.Arguments[2], command.Arguments[3]));
path.QuadTo(pt.X, pt.Y, pt2.X, pt2.Y);
}
break;
case PathDataParser.CommandType.Bezier:
{
var pt = trans.TransformPoint(
new System.Drawing.PointF(command.Arguments[0], command.Arguments[1]));
var pt2 = trans.TransformPoint(
new System.Drawing.PointF(command.Arguments[2], command.Arguments[3]));
var pt3 = trans.TransformPoint(
new System.Drawing.PointF(command.Arguments[4], command.Arguments[5]));
path.CubicTo(pt.X, pt.Y, pt2.X, pt2.Y, pt3.X, pt3.Y);
}
break;
case PathDataParser.CommandType.Close:
path.Close();
DrawPath(canvas, path);
path = new global::Android.Graphics.Path();
break;
}
}
if (!path.IsEmpty)
{
DrawPath(canvas, path);
}
}