src/point.h

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*- */
   2 /*
   3  * point.h
   4  *
   5  * Copyright 2007 Novell, Inc. (http://www.novell.com)
   6  *
   7  * See the LICENSE file included with the distribution for details.
   8  *
   9  */
  10
  11 #ifndef __MOON_POINT_H__
  12 #define __MOON_POINT_H__
  13
  14 #include <glib.h>
  15 #include <cairo.h>
  16 #include <math.h>
  17
  18 /* @IncludeInKinds */
  19 struct Point {
  20 public:
  21         double x, y;
  22
  23         Point () : x(0), y(0) {}
  24
  25         Point (double x, double y)
  26         {
  27                 this->x = x;
  28                 this->y = y;
  29         }
  30
  31         Point operator+ (const Point &point)
  32         {
  33                 return Point (x + point.x,
  34                               y + point.y);
  35         }
  36
  37         Point operator- (const Point &point)
  38         {
  39                 return Point (x - point.x,
  40                               y - point.y);
  41         }
  42
  43         Point operator* (double v)
  44         {
  45                 return Point (x * v, y * v);
  46         }
  47
  48         bool operator == (const Point &point) const
  49         {
  50                 return fabs (point.x-x) < DBL_EPSILON && fabs (point.y-y) < DBL_EPSILON;
  51         }
  52
  53         bool operator != (const Point &point) const
  54         {
  55                 return !(*this == point);
  56         }
  57
  58         Point Transform (cairo_matrix_t *matrix);
  59
  60         //
  61         // FromStr
  62         //   Parses @s and return a new point in @p.  Returns true if
  63         //   this was successful, false otherwise.
  64         //
  65         static bool FromStr (const char *s, Point *p);
  66 };
  67
  68 #endif /* __MOON_POINT_H__ */