public override void DrawGeometry (Brush brush, Pen pen, Geometry geometry)
{
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);
DrawGeometry (geometry);
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;
DrawGeometry (geometry);
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;
DrawGeometry (geometry);
cr.Stroke ();
}
}
private void DrawGeometry (Geometry geometry)
{
if (geometry is PathGeometry) {
var path = geometry as PathGeometry;
foreach (var figure in path.Figures) {
DrawFigure (figure);
}
}
}
public abstract void DrawGeometry (Brush brush, Pen pen, Geometry geometry);