public static void Ellipse(Cairo.Context context, PointF p, double r, Color color, bool filled, double width = 1.0)
{
context.Save();
context.Translate(p.X, p.Y);
if (!filled)
{
context.LineWidth = width;
context.LineCap = Cairo.LineCap.Butt;
context.LineJoin = Cairo.LineJoin.Bevel;
}
var c = color.ToCairo();
context.SetSourceRGBA(c.R, c.G, c.B, c.A);
context.Arc(0, 0, r, 0, Math.PI * 2);
if (filled)
{
context.Fill();
}
else
{
context.Stroke();
}
context.Restore();
}
public static void Arc(Cairo.Context context, PointF p, double r, double a1, double a2, bool clockwise, Color color, bool filled, double width = 1.0)
{
context.Save();
context.Translate(p.X, p.Y);
if (!filled)
{
context.LineWidth = width;
context.LineCap = Cairo.LineCap.Butt;
context.LineJoin = Cairo.LineJoin.Bevel;
}
var c = color.ToCairo();
context.SetSourceRGBA(c.R, c.G, c.B, c.A);
if (clockwise)
{
context.Arc(0, 0, r, a1, a2);
}
else
{
context.ArcNegative(0, 0, r, a1, a2);
}
if (filled)
{
context.Fill();
}
else
{
context.Stroke();
}
context.Restore();
}
public object Create (Color startColor, Color endColor, PointF startPoint, PointF endPoint)
{
var gradient = new EtoGradient (startPoint.X, startPoint.Y, endPoint.X, endPoint.Y);
gradient.Extend = Cairo.Extend.Pad;
gradient.AddColorStop (0, startColor.ToCairo ());
gradient.AddColorStop (1, endColor.ToCairo ());
return gradient;
}
public object Create(Color startColor, Color endColor, PointF startPoint, PointF endPoint)
{
var gradient = new EtoGradient(startPoint.X, startPoint.Y, endPoint.X, endPoint.Y);
gradient.Extend = Cairo.Extend.Pad;
gradient.AddColorStop(0, startColor.ToCairo());
gradient.AddColorStop(1, endColor.ToCairo());
return(gradient);
}
public object Create(Color color, float thickness)
{
return(new PenObject {
Color = color.ToCairo(),
Thickness = thickness,
MiterLimit = 10f,
LineCap = PenLineCap.Square.ToCairo()
});
}
public object Create (Color startColor, Color endColor, PointF startPoint, PointF endPoint)
{
var gradient = new EtoGradient (startPoint.X, startPoint.Y, endPoint.X, endPoint.Y);
cairo_pattern_set_extend (gradient.Pointer, Cairo.Extend.Repeat);
// not in windows?? gradient.Extend = Cairo.Extend.Repeat;
gradient.AddColorStop (0, startColor.ToCairo ());
gradient.AddColorStop (1, endColor.ToCairo ());
return gradient;
}
public object Create(Color startColor, Color endColor, PointF center, PointF gradientOrigin, SizeF radius)
{
var gradient = new EtoGradient(gradientOrigin, center, radius);
gradient.Radius = radius;
gradient.Extend = Cairo.Extend.Pad;
gradient.AddColorStop(0, startColor.ToCairo());
gradient.AddColorStop(1, endColor.ToCairo());
return gradient;
}
public object Create(Color startColor, Color endColor, PointF center, PointF gradientOrigin, SizeF radius)
{
var gradient = new EtoGradient(gradientOrigin, center, radius);
gradient.Radius = radius;
gradient.Extend = Cairo.Extend.Pad;
gradient.AddColorStop(0, startColor.ToCairo());
gradient.AddColorStop(1, endColor.ToCairo());
return(gradient);
}
public object Create(Color startColor, Color endColor, PointF startPoint, PointF endPoint)
{
var gradient = new EtoGradient(startPoint.X, startPoint.Y, endPoint.X, endPoint.Y);
cairo_pattern_set_extend(gradient.Pointer, Cairo.Extend.Repeat);
// not in windows?? gradient.Extend = Cairo.Extend.Repeat;
gradient.AddColorStop(0, startColor.ToCairo());
gradient.AddColorStop(1, endColor.ToCairo());
return(gradient);
}
public void RenderScene(Node rootNode)
{
using (var context = contextInitializer()) {
context.Operator = Operator.Source;
context.Color = background.ToCairo();
context.Paint();
context.Operator = Operator.Over;
RenderNode(rootNode, context);
}
}
void DrawQuota(Cairo.Context context, double angle, Color color)
{
context.Save();
context.Rotate(angle * Math.PI / 180.0);
context.MoveTo(0, -95);
context.LineTo(1, -110);
context.LineTo(-1, -110);
context.ClosePath();
var c = color.ToCairo();
context.SetSourceRGBA(c.R, c.G, c.B, c.A);
context.Stroke();
context.Restore();
}
public static void Polyline(Cairo.Context context, IEnumerable <PointF> points, Color color, double width = 1.0)
{
context.Save();
if (points.Count() < 2)
{
return;
}
context.LineWidth = width;
context.LineCap = Cairo.LineCap.Round;
context.LineJoin = Cairo.LineJoin.Round;
var c = color.ToCairo();
context.SetSourceRGBA(c.R, c.G, c.B, c.A);
context.MoveTo(points.ElementAt(0).X, points.ElementAt(0).Y);
for (int i = 1; i < points.Count(); i++)
{
context.LineTo(points.ElementAt(i).X, points.ElementAt(i).Y);
}
context.Stroke();
context.Restore();
}
public void SetColor (SolidBrush widget, Color color)
{
widget.ControlObject = color.ToCairo ();
}
public void SetColor(SolidBrush widget, Color color)
{
widget.ControlObject = color.ToCairo();
}
public object Create(Color color)
{
return(color.ToCairo());
}
/// <summary>
/// Creates a gradient for the given position, size, and anchor location.
/// </summary>
protected Cairo.LinearGradient GenerateGradient(Coord point, Coord size, AnchorLocation location,
Color startColor, Color stopColor)
{
Cairo.LinearGradient grad = null;
var x = point.X;
var y = point.Y;
var r = (size.X + size.Y) / 2.0;
switch (location)
{
case AnchorLocation.E:
grad = new Cairo.LinearGradient(x + size.X, y, x, y);
break;
case AnchorLocation.NE:
grad = new Cairo.LinearGradient(x + r, y, x, y + r);
break;
case AnchorLocation.N:
grad = new Cairo.LinearGradient(x, y, x, y + size.Y);
break;
case AnchorLocation.NW:
grad = new Cairo.LinearGradient(x, y, x + r, y + r);
break;
case AnchorLocation.W:
grad = new Cairo.LinearGradient(x, y, x + size.X, y);
break;
case AnchorLocation.SW:
grad = new Cairo.LinearGradient(x, y + r, x + r, y);
break;
case AnchorLocation.S:
grad = new Cairo.LinearGradient(x, y + size.Y, x, y);
break;
case AnchorLocation.SE:
grad = new Cairo.LinearGradient(x + r, y + r, x, y);
break;
}
// assign the colors
if (startColor == null)
startColor = defaultBackgroundColor;
grad.AddColorStop(0, startColor.ToCairo());
if (stopColor == null)
stopColor = defaultBackgroundColor;
grad.AddColorStop(1, stopColor.ToCairo());
return grad;
}
public void SetColor(Pen widget, Color color)
{
((PenObject)widget.ControlObject).Color = color.ToCairo();
}
public void SetColor (Pen widget, Color color)
{
((PenObject)widget.ControlObject).Color = color.ToCairo ();
}
public object Create (Color color, float thickness)
{
return new PenObject {
Color = color.ToCairo (),
Thickness = thickness,
MiterLimit = 10f,
LineCap = PenLineCap.Square.ToCairo ()
};
}
public object Create (Color color)
{
return color.ToCairo ();
}
