This is the main object when drawing with Cairo. [Edit]

See Also: Context Members

public class Context : IDisposable

Remarks

C# Example

// This example sets up a surface on a GTK window and draws an arc to it. // More examples are available in the samples directory in mcs/classes/Mono.Cairo // // Compile like this: // mcs sample.cs -pkg:gtk-sharp-2.0 -r:Mono.Cairo // using System; using System.Reflection; using System.Runtime.InteropServices; using Cairo; using Gtk; public class GtkCairo { static DrawingArea a; static void Main () { Application.Init (); Gtk.Window w = new Gtk.Window ("Mono.Cairo Circles demo"); a = new CairoGraphic (); Box box = new HBox (true, 0); box.Add (a); w.Add (box); w.Resize (500,500); w.ShowAll (); Application.Run (); } } public class CairoGraphic : DrawingArea { static readonly double M_PI = 3.14159265358979323846; static void draw (Cairo.Context gr, int width, int height) { double xc = 0.5; double yc = 0.5; double radius = 0.4; double angle1 = 45.0 * (M_PI/180.0); /* angles are specified */ double angle2 = 180.0 * (M_PI/180.0); /* in radians */ gr.Scale (width, height); gr.LineWidth = 0.04; gr.Arc (xc, yc, radius, angle1, angle2); gr.Stroke (); /* draw helping lines */ gr.Color = new Color(1, 0.2, 0.2, 0.6); gr.Arc (xc, yc, 0.05, 0, 2*M_PI); gr.Fill (); gr.LineWidth = 0.03; gr.Arc (xc, yc, radius, angle1, angle1); gr.LineTo (new PointD(xc, yc)); gr.Arc (xc, yc, radius, angle2, angle2); gr.LineTo (new PointD(xc, yc)); gr.Stroke (); } protected override bool OnExposeEvent (Gdk.EventExpose args) { Gdk.Window win = args.Window; #if OLD_SYSTEMS // // For old versions of Gtk# (before 2.8), you need the helper class // available in gtk-sharp/sample/GtkCairo.cs // Cairo.Context g = Gdk.Graphics.CreateDrawable (win); #else // // Starting with Gtk 2.8 Gtk has direct support for // Cairo, as its built on top of it, on older // versions, a helper routine is used // Context g = Gdk.CairoHelper.Create (args.Window); #endif int x, y, w, h, d; win.GetGeometry(out x, out y, out w, out h, out d); draw (g, w, h); return true; } }

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Requirements

Namespace: Cairo
Assembly: Mono.Cairo (in Mono.Cairo.dll)
Assembly Versions: 1.0.5000.0, 2.0.0.0