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//
//
// Mono.Cairo drawing samples using GTK# as drawing surface
// Autor: Jordi Mas <jordi@ximian.com>. Based on work from Owen Taylor
// Hisham Mardam Bey <hisham@hisham.cc>
//
//
// Copyright (C) 2004 Novell, Inc (http://www.novell.com)
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
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)
{
//gr.Scale (width, height);
//gr.LineWidth = 0.04;
double X_FUZZ = 0.08;
double Y_FUZZ = 0.08;
double X_INNER_RADIUS = 0.3;
double Y_INNER_RADIUS = 0.2;
double X_OUTER_RADIUS = 0.45;
double Y_OUTER_RADIUS = 0.35;
double SPIKES = 10;
int i;
double x;
double y;
string text = "KAPOW!";
cairo_text_extents_t extents;
srand (45);
cairo_set_line_width (cr, 0.01);
for (i = 0; i < SPIKES * 2; i++) {
x = 0.5 + cos (M_PI * i / SPIKES) * X_INNER_RADIUS +
(double) rand() * X_FUZZ / RAND_MAX;
y = 0.5 + sin (M_PI * i / SPIKES) * Y_INNER_RADIUS +
(double) rand() * Y_FUZZ / RAND_MAX;
if (i == 0)
cairo_move_to (cr, x, y);
else
cairo_line_to (cr, x, y);
i++;
x = 0.5 + cos (M_PI * i / SPIKES) * X_OUTER_RADIUS +
(double) rand() * X_FUZZ / RAND_MAX;
y = 0.5 + sin (M_PI * i / SPIKES) * Y_OUTER_RADIUS +
(double) rand() * Y_FUZZ / RAND_MAX;
cairo_line_to (cr, x, y);
}
cairo_close_path (cr);
cairo_stroke (cr);
cairo_select_font_face (cr, "Sans",
CAIRO_FONT_SLANT_NORMAL,
CAIRO_FONT_WEIGHT_BOLD);
cairo_move_to (cr, x, y);
cairo_text_path (cr, text);
cairo_set_font_size (cr, 0.2);
cairo_text_extents (cr, text, &extents);
x = 0.5-(extents.width/2 + extents.x_bearing);
y = 0.5-(extents.height/2 + extents.y_bearing);
cairo_set_source_rgb (cr, 1 , 1, 0.5);
cairo_fill (cr);
cairo_move_to (cr, x, y);
cairo_text_path (cr, text);
cairo_set_source_rgb (cr, 0 , 0, 0);
cairo_stroke (cr);
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;
//Gdk.Rectangle area = args.Area;
Cairo.Context g = Gdk.Context.CreateDrawable (win);
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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