public override void DrawEllipse (Brush brush, Pen pen, Point center, double radiusX, double radiusY)
{
cr.Save ();
cr.Translate (center.X, center.Y);
cr.Scale (1, radiusY / radiusX);
if (brush != null) {
if (brush is SolidColorBrush) {
var b = brush as SolidColorBrush;
cr.Color = new Cairo.Color (b.Color.R, b.Color.G, b.Color.B, b.Color.Alfa);
cr.Arc (0, 0, radiusX, 0, 2 * Math.PI);
cr.Fill ();
}
}
if (pen != null) {
cr.Color = new Cairo.Color (pen.Color.R, pen.Color.G, pen.Color.B, pen.Color.Alfa);
cr.LineWidth = pen.Thickness;
cr.Arc (0, 0, radiusX - pen.Thickness / 2, 0, 2 * Math.PI);
cr.Stroke ();
}
cr.Restore ();
}
public override void DrawRectangle (Brush brush, Pen pen, Rect rectangle)
{
if (brush != null) {
if (brush is SolidColorBrush) {
var b = brush as SolidColorBrush;
cr.Color = new Cairo.Color (b.Color.R, b.Color.G, b.Color.B, b.Color.Alfa);
cr.Rectangle (rectangle.X, rectangle.Y, rectangle.Width, rectangle.Height);
cr.Fill ();
} else if (brush is LinearGradientBrush) {
var b = brush as LinearGradientBrush;
var pattern = new Cairo.LinearGradient (b.StartPoint.X, b.StartPoint.Y, b.EndPoint.X, b.EndPoint.Y);
foreach (var stop in b.GradientStops) {
pattern.AddColorStop (stop.Offset, new Cairo.Color (stop.Color.R, stop.Color.G, stop.Color.B, stop.Color.Alfa));
}
cr.Pattern = pattern;
cr.Rectangle (rectangle.X, rectangle.Y, rectangle.Width, rectangle.Height);
cr.Fill ();
}
}
if (pen != null) {
cr.Color = new Cairo.Color (pen.Color.R, pen.Color.G, pen.Color.B, pen.Color.Alfa);
cr.LineWidth = pen.Thickness;
cr.Rectangle (rectangle.X, rectangle.Y, rectangle.Width, rectangle.Height);
cr.Stroke ();
}
}
public override void DrawRoundedRectangle (Brush brush, Pen pen, Rect rectangle, double radiusX, double radiusY)
{
var figure = new PathFigure ();
figure.StartPoint = new Point (rectangle.X + radiusX, rectangle.Y);
figure.Segments.Add (new LineSegment () { Point = new Point(rectangle.X + rectangle.Width - radiusX, rectangle.Y) });
figure.Segments.Add (new ArcSegment ()
{
Point = new Point(rectangle.X + rectangle.Width, rectangle.Y + radiusY),
Size = new Size(radiusX, radiusY),
SweepDirection = SweepDirection.Clockwise,
IsLargeArc = false
}
);
figure.Segments.Add (new LineSegment () { Point = new Point(rectangle.X + rectangle.Width, rectangle.Y + rectangle.Height - radiusY) });
figure.Segments.Add (new ArcSegment ()
{
Point = new Point(rectangle.X + rectangle.Width - radiusX, rectangle.Y + rectangle.Height),
Size = new Size(radiusX, radiusY),
SweepDirection = SweepDirection.Clockwise,
IsLargeArc = false
}
);
figure.Segments.Add (new LineSegment () { Point = new Point(rectangle.X + radiusX, rectangle.Y + rectangle.Height) });
figure.Segments.Add (new ArcSegment ()
{
Point = new Point(rectangle.X, rectangle.Y + rectangle.Height - radiusY),
Size = new Size(radiusX, radiusY),
SweepDirection = SweepDirection.Clockwise,
IsLargeArc = false
}
);
figure.Segments.Add (new LineSegment () { Point = new Point(rectangle.X, rectangle.Y + radiusY) });
figure.Segments.Add (new ArcSegment ()
{
Point = new Point(rectangle.X + radiusX, rectangle.Y),
Size = new Size(radiusX, radiusY),
SweepDirection = SweepDirection.Clockwise,
IsLargeArc = false
}
);
var path = new PathGeometry ();
path.Figures.Add (figure);
}
public Shape ()
{
StrokeThickness = 1;
Stroke = Colors.Black;
Fill = Brushes.Transparent;
}
public abstract void DrawGeometry (Brush brush, Pen pen, Geometry geometry);
public abstract void DrawRoundedRectangle (Brush brush, Pen pen, Rect rectangle, double radiusX, double radiusY);
public abstract void DrawRectangle (Brush brush, Pen pen, Rect rectangle);
public abstract void DrawEllipse (Brush brush, Pen pen, Point center, double radiusX, double radiusY);