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gradient.hh
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1 //------------------------------------------------------------------------------
2 // This file is part of the OpenStructure project <www.openstructure.org>
3 //
4 // Copyright (C) 2008-2011 by the OpenStructure authors
5 //
6 // This library is free software; you can redistribute it and/or modify it under
7 // the terms of the GNU Lesser General Public License as published by the Free
8 // Software Foundation; either version 3.0 of the License, or (at your option)
9 // any later version.
10 // This library is distributed in the hope that it will be useful, but WITHOUT
11 // ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
12 // FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
13 // details.
14 //
15 // You should have received a copy of the GNU Lesser General Public License
16 // along with this library; if not, write to the Free Software Foundation, Inc.,
17 // 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
18 //------------------------------------------------------------------------------
19 #ifndef OST_GFX_GRADIENT_HH
20 #define OST_GFX_GRADIENT_HH
21 
22 /*
23  Authors: Marco Biasini, Ansgar Philippsen
24 */
25 
26 #include <vector>
27 
28 #include "color.hh"
29 
30 #include <ost/info/info.hh>
31 #include <ost/info/info_fw.hh>
32 
33 namespace ost { namespace gfx {
34 
60 public:
61  struct Stop {
62  Stop(): t(0.0) {}
63 
64  Stop(float tt, const Color& c): t(tt), color(c) {}
65  float t;
67 
68  Color GetColor() const {
69  return color;
70  }
71 
72  float GetRel() const {
73  return t;
74  }
75 
76  bool operator==(const Stop& ref) const
77  {
78  return t==ref.t && color==ref.color;
79  }
80 
81  };
82 
83  typedef std::vector<Stop> StopList;
84 
85 public:
90  Gradient();
91 
93  Gradient(const String& name);
94 
96  Color GetColorAt(float t) const;
101  void SetColorAt(float t, const Color& color);
102 
104  // TODO: rename to ToInfo
105  // TODO:: add stand-alone function named GradientToInfo(Gradient, InfoGroup)
106  void GradientToInfo(info::InfoGroup& group) const;
107 
109  StopList GetStops() const;
110 
112  // TODO: move outside
113  // TODO: add FromInfo member function that overwrites this
114  static gfx::Gradient GradientFromInfo(const info::InfoGroup& group);
115 
117  void SetHSVMode(bool m) {hsv_mode_=m;}
119  bool GetHSVMode() const {return hsv_mode_;}
120 
121 private:
122  std::vector<Stop> stops_;
123  bool hsv_mode_;
124 };
125 
126 
130 }}
131 
132 #endif