mcs/class/Mono.Cairo/Samples/x11/curve_rect.cs

   1 //
   2 //
   3 //      Mono.Cairo drawing samples using X11 as drawing surface
   4 //      Autor: Hisham Mardam Bey <hisham@hisham.cc>
   5 //
   6
   7 //
   8 // Copyright (C) 2005 Novell, Inc (http://www.novell.com)
   9 //
  10 // Permission is hereby granted, free of charge, to any person obtaining
  11 // a copy of this software and associated documentation files (the
  12 // "Software"), to deal in the Software without restriction, including
  13 // without limitation the rights to use, copy, modify, merge, publish,
  14 // distribute, sublicense, and/or sell copies of the Software, and to
  15 // permit persons to whom the Software is furnished to do so, subject to
  16 // the following conditions:
  17 //
  18 // The above copyright notice and this permission notice shall be
  19 // included in all copies or substantial portions of the Software.
  20 //
  21 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  22 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  23 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  24 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  25 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  26 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  27 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  28 //
  29
  30 using System;
  31 using System.Reflection;
  32 using System.Runtime.InteropServices;
  33 using Cairo;
  34
  35 public class X11Test
  36 {
  37         static void draw (Cairo.Graphics gr, int width, int height)
  38         {
  39                 double x0 = 0.1;
  40                 double y0 = 0.1;
  41                 double rect_width  = 0.8;
  42                 double rect_height = 0.8;
  43                 double radius = 0.4;
  44
  45                 double x1,y1;
  46
  47                 gr.Scale (width, height);
  48                 gr.LineWidth = 0.04;
  49
  50                 x1=x0+rect_width;
  51                 y1=y0+rect_height;
  52                 if (rect_width == 0 || rect_height == 0)
  53                   return;
  54
  55                 if (rect_width/2<radius) {
  56                         if (rect_height/2<radius) {
  57                                 gr.MoveTo( new PointD(x0, (y0 + y1)/2) );
  58
  59                                 gr.CurveTo ( new PointD (x0 ,y0),
  60                                              new PointD (x0, y0),
  61                                              new PointD ((x0 + x1)/2, y0)
  62                                              );
  63
  64                                 gr.CurveTo ( new PointD (x1, y0 ),
  65                                              new PointD (x1, y0 ),
  66                                              new PointD (x1, (y0 + y1)/2)
  67                                              );
  68
  69                                 gr.CurveTo ( new PointD (x1, y1),
  70                                              new PointD (x1, y1),
  71                                              new PointD ((x1 + x0)/2, y1)
  72                                              );
  73
  74                                 gr.CurveTo ( new PointD (x0, y1),
  75                                              new PointD (x0, y1),
  76                                              new PointD (x0, (y0 + y1)/2)
  77                                              );
  78                         }
  79                         else {
  80                                 gr.MoveTo ( new PointD (x0, y0 + radius) );
  81
  82                                 gr.CurveTo ( new PointD (x0 ,y0),
  83                                              new PointD (x0, y0),
  84                                              new PointD ((x0 + x1)/2, y0)
  85                                              );
  86
  87                                 gr.CurveTo ( new PointD (x1, y0),
  88                                              new PointD (x1, y0),
  89                                              new PointD (x1, y0 + radius)
  90                                              );
  91
  92                                 gr.LineTo ( new PointD (x1 , y1 - radius) );
  93
  94                                 gr.CurveTo ( new PointD (x1, y1),
  95                                              new PointD (x1, y1),
  96                                              new PointD ((x1 + x0)/2, y1)
  97                                              );
  98
  99                                 gr.CurveTo ( new PointD (x0, y1),
 100                                              new PointD (x0, y1),
 101                                              new PointD (x0, y1- radius)
 102                                              );
 103                         }
 104                 }
 105                 else {
 106                         if (rect_height/2<radius) {
 107                                 gr.MoveTo ( new PointD (x0, (y0 + y1)/2) );
 108
 109                                 gr.CurveTo ( new PointD (x0 , y0),
 110                                              new PointD (x0 , y0),
 111                                              new PointD (x0 + radius, y0)
 112                                              );
 113
 114                                 gr.LineTo ( new PointD (x1 - radius, y0) );
 115
 116                                 gr.CurveTo ( new PointD (x1, y0),
 117                                              new PointD (x1, y0),
 118                                              new PointD (x1, (y0 + y1)/2)
 119                                              );
 120
 121                                 gr.CurveTo ( new PointD (x1, y1),
 122                                              new PointD (x1, y1),
 123                                              new PointD (x1 - radius, y1)
 124                                              );
 125
 126                                 gr.LineTo ( new PointD (x0 + radius, y1) );
 127
 128                                 gr.CurveTo ( new PointD ( x0, y1),
 129                                              new PointD (x0, y1),
 130                                              new PointD (x0, (y0 + y1)/2)
 131                                              );
 132                         }
 133                         else {
 134                                 gr.MoveTo  ( new PointD (x0, y0 + radius) );
 135
 136                                 gr.CurveTo ( new PointD (x0 , y0),
 137                                              new PointD (x0 , y0),
 138                                              new PointD (x0 + radius, y0)
 139                                              );
 140
 141                                 gr.LineTo ( new PointD (x1 - radius, y0) );
 142
 143                                 gr.CurveTo ( new PointD (x1, y0),
 144                                              new PointD (x1, y0),
 145                                              new PointD (x1, y0 + radius)
 146                                              );
 147
 148                                 gr.LineTo ( new PointD (x1 , y1 - radius) );
 149
 150                                 gr.CurveTo ( new PointD ( x1, y1),
 151                                              new PointD (x1, y1),
 152                                              new PointD (x1 - radius, y1)
 153                                              );
 154
 155                                 gr.LineTo ( new PointD (x0 + radius, y1) );
 156                                 gr.CurveTo ( new PointD ( x0, y1),
 157                                              new PointD (x0, y1),
 158                                              new PointD (x0, y1- radius)
 159                                              );
 160                         }
 161                 }
 162
 163                 gr.Color = new Color (0.5,0.5,1, 1);
 164                 gr.FillPreserve ();
 165                 gr.Color = new Color(0.5, 0, 0, 0.5);
 166                 gr.Stroke ();
 167         }
 168
 169         static void Main (string [] args)
 170         {
 171                 Window win = new Window (500, 500);
 172
 173                 win.Show ();
 174
 175                 Cairo.Surface s = Cairo.Surface.CreateForXlib (win.Display,
 176                                win.XWindow,
 177                                X11.XDefaultVisual (win.Display, win.Screen),
 178                                (int)win.Width, (int)win.Height);
 179
 180
 181                 Cairo.Graphics g = new Cairo.Graphics (s);
 182
 183                 draw (g, 500, 500);
 184
 185                 IntPtr xev = new IntPtr ();
 186
 187                 while (true) {
 188                         X11.XNextEvent (win.Display, xev);
 189                 }
 190         }
 191 }