protected override IGeometryImpl CreateDefiningGeometry()
{
var factory = AvaloniaLocator.Current.GetService <IPlatformRenderInterface>();
var geometry = factory.CreateStreamGeometry();
using (var ctx = new StreamGeometryContext(geometry.Open()))
{
ctx.SetFillRule(FillRule);
foreach (var f in Figures)
{
f.ApplyTo(ctx);
}
}
return(geometry);
}
/// <summary>
/// Parses the specified markup string.
/// </summary>
/// <param name="s">The markup string.</param>
public void Parse(string s)
{
bool openFigure = false;
using (StringReader reader = new StringReader(s))
{
Command command = Command.None;
Point point = new Point();
bool relative = false;
Point? previousControlPoint = null;
while (ReadCommand(reader, ref command, ref relative))
{
switch (command)
{
case Command.FillRule:
_context.SetFillRule(ReadFillRule(reader));
previousControlPoint = null;
break;
case Command.Move:
if (openFigure)
{
_context.EndFigure(false);
}
point = ReadPoint(reader, point, relative);
_context.BeginFigure(point, true);
openFigure = true;
previousControlPoint = null;
break;
case Command.Line:
point = ReadPoint(reader, point, relative);
_context.LineTo(point);
previousControlPoint = null;
break;
case Command.HorizontalLine:
if (!relative)
{
point = point.WithX(ReadDouble(reader));
}
else
{
point = new Point(point.X + ReadDouble(reader), point.Y);
}
_context.LineTo(point);
previousControlPoint = null;
break;
case Command.VerticalLine:
if (!relative)
{
point = point.WithY(ReadDouble(reader));
}
else
{
point = new Point(point.X, point.Y + ReadDouble(reader));
}
_context.LineTo(point);
previousControlPoint = null;
break;
case Command.QuadraticBezierCurve:
{
Point handle = ReadPoint(reader, point, relative);
previousControlPoint = handle;
ReadSeparator(reader);
point = ReadPoint(reader, point, relative);
_context.QuadraticBezierTo(handle, point);
break;
}
case Command.SmoothQuadraticBezierCurve:
{
Point end = ReadPoint(reader, point, relative);
if (previousControlPoint != null)
{
previousControlPoint = MirrorControlPoint((Point)previousControlPoint, point);
}
_context.QuadraticBezierTo(previousControlPoint ?? point, end);
point = end;
break;
}
case Command.CubicBezierCurve:
{
Point point1 = ReadPoint(reader, point, relative);
ReadSeparator(reader);
Point point2 = ReadPoint(reader, point, relative);
previousControlPoint = point2;
ReadSeparator(reader);
point = ReadPoint(reader, point, relative);
_context.CubicBezierTo(point1, point2, point);
break;
}
case Command.SmoothCubicBezierCurve:
{
Point point2 = ReadPoint(reader, point, relative);
ReadSeparator(reader);
Point end = ReadPoint(reader, point, relative);
if (previousControlPoint != null)
{
previousControlPoint = MirrorControlPoint((Point)previousControlPoint, point);
}
_context.CubicBezierTo(previousControlPoint ?? point, point2, end);
previousControlPoint = point2;
point = end;
break;
}
case Command.Arc:
{
Size size = ReadSize(reader);
ReadSeparator(reader);
double rotationAngle = ReadDouble(reader);
ReadSeparator(reader);
bool isLargeArc = ReadBool(reader);
ReadSeparator(reader);
SweepDirection sweepDirection = ReadBool(reader) ? SweepDirection.Clockwise : SweepDirection.CounterClockwise;
ReadSeparator(reader);
point = ReadPoint(reader, point, relative);
_context.ArcTo(point, size, rotationAngle, isLargeArc, sweepDirection);
previousControlPoint = null;
break;
}
case Command.Close:
_context.EndFigure(true);
openFigure = false;
previousControlPoint = null;
break;
default:
throw new NotSupportedException("Unsupported command");
}
}
if (openFigure)
{
_context.EndFigure(false);
}
}
}
/// <summary>
/// Parses the specified markup string.
/// </summary>
/// <param name="s">The markup string.</param>
public void Parse(string s)
{
bool openFigure = false;
using (StringReader reader = new StringReader(s))
{
Command lastCommand = Command.None;
Command command;
Point point = new Point();
while ((command = ReadCommand(reader, lastCommand)) != Command.Eof)
{
switch (command)
{
case Command.FillRule:
_context.SetFillRule(ReadFillRule(reader));
break;
case Command.Move:
case Command.MoveRelative:
if (openFigure)
{
_context.EndFigure(false);
}
point = command == Command.Move ?
ReadPoint(reader) :
ReadRelativePoint(reader, point);
_context.BeginFigure(point, true);
openFigure = true;
break;
case Command.Line:
point = ReadPoint(reader);
_context.LineTo(point);
break;
case Command.LineRelative:
point = ReadRelativePoint(reader, point);
_context.LineTo(point);
break;
case Command.HorizontalLine:
point = point.WithX(ReadDouble(reader));
_context.LineTo(point);
break;
case Command.HorizontalLineRelative:
point = new Point(point.X + ReadDouble(reader), point.Y);
_context.LineTo(point);
break;
case Command.VerticalLine:
point = point.WithY(ReadDouble(reader));
_context.LineTo(point);
break;
case Command.VerticalLineRelative:
point = new Point(point.X, point.Y + ReadDouble(reader));
_context.LineTo(point);
break;
case Command.CubicBezierCurve:
{
Point point1 = ReadPoint(reader);
Point point2 = ReadPoint(reader);
point = ReadPoint(reader);
_context.CubicBezierTo(point1, point2, point);
break;
}
case Command.CubicBezierCurveRelative:
{
Point point1 = ReadRelativePoint(reader, point);
Point point2 = ReadRelativePoint(reader, point);
_context.CubicBezierTo(point, point1, point2);
point = point2;
break;
}
case Command.Arc:
{
//example: A10,10 0 0,0 10,20
//format - size rotationAngle isLargeArcFlag sweepDirectionFlag endPoint
Size size = ReadSize(reader);
ReadSeparator(reader);
double rotationAngle = ReadDouble(reader);
ReadSeparator(reader);
bool isLargeArc = ReadBool(reader);
ReadSeparator(reader);
SweepDirection sweepDirection = ReadBool(reader) ? SweepDirection.Clockwise : SweepDirection.CounterClockwise;
point = ReadPoint(reader);
_context.ArcTo(point, size, rotationAngle, isLargeArc, sweepDirection);
break;
}
case Command.Close:
_context.EndFigure(true);
openFigure = false;
break;
default:
throw new NotSupportedException("Unsupported command");
}
lastCommand = command;
}
if (openFigure)
{
_context.EndFigure(false);
}
}
}