legend.hpp
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1 
5 /* Copyright (c) 2005-2011 Taneli Kalvas. All rights reserved.
6  *
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42 
43 #ifndef LEGEND_HPP
44 #define LEGEND_HPP 1
45 
46 
47 #include <vector>
48 #include <string>
49 #include "graph.hpp"
50 #include "label.hpp"
51 #include "colormap.hpp"
52 
53 
62 
66 
70 };
71 
72 
73 #define LEGEND_POS_VERTICAL_MASK 12
74 #define LEGEND_POS_HORIZONTAL_MASK 3
75 
76 #define LEGEND_POS_BOTTOM 0
77 #define LEGEND_POS_MIDDLE 4
78 #define LEGEND_POS_TOP 8
79 
80 #define LEGEND_POS_LEFT 0
81 #define LEGEND_POS_CENTER 1
82 #define LEGEND_POS_RIGHT 2
83 
84 
93 class LegendEntry {
94 
95  Graph &_graph;
96  Label _label;
98 public:
99 
102  LegendEntry( Graph &graph, const std::string &label )
103  : _graph(graph), _label(label) {}
104 
107  LegendEntry( const LegendEntry &le )
108  : _graph(le._graph), _label(le._label) {}
109 
113 
117  _graph = le._graph;
118  _label = le._label;
119  return( *this );
120  }
121 
126  void plot( cairo_t *cairo, double x, double y );
127 
130  void get_size( cairo_t *cairo, double &width, double &height ) const;
131 
134  void set_font_size( double fontsize );
135 };
136 
137 
149 class Legend {
150 
151 public:
152 
155  Legend() {}
156 
159  virtual ~Legend() {}
160 
165  virtual void plot( cairo_t *cairo, double x, double y ) = 0;
166 
169  virtual void get_size( cairo_t *cairo, double &width, double &height ) const = 0;
170 };
171 
172 
176 
177  double _fontsize;
178  std::vector<LegendEntry *> _entry;
180 public:
181 
185 
188  virtual ~MultiEntryLegend() {}
189 
194  virtual void plot( cairo_t *cairo, double x, double y );
195 
198  virtual void get_size( cairo_t *cairo, double &width, double &height ) const;
199 
202  void set_font_size( double fontsize );
203 
206  void add_entry( LegendEntry *entry );
207 
210  void clear_entries( void );
211 };
212 
213 
217 
218  double _height;
219  Colormap &_colormap;
220 
221 
222 public:
223 
226  ColormapLegend( Colormap &colormap ) : _height(0.0), _colormap(colormap) {}
227 
230  virtual ~ColormapLegend() {}
231 
236  virtual void plot( cairo_t *cairo, double x, double y );
237 
240  virtual void get_size( cairo_t *cairo, double &width, double &height ) const;
241 
244  void set_height( double height );
245 };
246 
247 
248 #endif
249