label.hpp

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00001 
00005 /* Copyright (c) 2005-2010 Taneli Kalvas. All rights reserved.
00006  *
00007  * You can redistribute this software and/or modify it under the terms
00008  * of the GNU General Public License as published by the Free Software
00009  * Foundation; either version 2 of the License, or (at your option)
00010  * any later version.
00011  * 
00012  * This library is distributed in the hope that it will be useful, but
00013  * WITHOUT ANY WARRANTY; without even the implied warranty of
00014  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
00015  * General Public License for more details.
00016  * 
00017  * You should have received a copy of the GNU General Public License
00018  * along with this library (file "COPYING" included in the package);
00019  * if not, write to the Free Software Foundation, Inc., 51 Franklin
00020  * Street, Fifth Floor, Boston, MA 02110-1301 USA
00021  * 
00022  * If you have questions about your rights to use or distribute this
00023  * software, please contact Berkeley Lab's Technology Transfer
00024  * Department at TTD@lbl.gov. Other questions, comments and bug
00025  * reports should be sent directly to the author via email at
00026  * taneli.kalvas@jyu.fi.
00027  * 
00028  * NOTICE. This software was developed under partial funding from the
00029  * U.S.  Department of Energy.  As such, the U.S. Government has been
00030  * granted for itself and others acting on its behalf a paid-up,
00031  * nonexclusive, irrevocable, worldwide license in the Software to
00032  * reproduce, prepare derivative works, and perform publicly and
00033  * display publicly.  Beginning five (5) years after the date
00034  * permission to assert copyright is obtained from the U.S. Department
00035  * of Energy, and subject to any subsequent five (5) year renewals,
00036  * the U.S. Government is granted for itself and others acting on its
00037  * behalf a paid-up, nonexclusive, irrevocable, worldwide license in
00038  * the Software to reproduce, prepare derivative works, distribute
00039  * copies to the public, perform publicly and display publicly, and to
00040  * permit others to do so.
00041  */
00042 
00043 #ifndef LABEL_HPP
00044 #define LABEL_HPP 1
00045 
00046 
00047 #include <string>
00048 #include <cairo.h>
00049 
00050 #include "color.hpp"
00051 
00052 
00057 class Label
00058 {
00059     std::string          _text;      
00061     double               _size;      
00062     std::string          _family;    
00063     cairo_font_slant_t   _slant;     
00067     cairo_font_weight_t  _weight;    
00071     Color                _color;     
00073     double               _xalign;    
00074     double               _yalign;    
00075     bool                 _yzeroext;  
00076     double               _rotation;  
00077     double               _xlocation; 
00078     double               _ylocation; 
00081     void process_parsed( cairo_t *cairo, const std::string &text, cairo_text_extents_t *extents0, 
00082                          double x0, double y0, double &x, double &y );
00083     void parse_latex( cairo_t *cairo, const std::string &text, cairo_text_extents_t *extents0, 
00084                       double x0, double y0, double &x, double &y );
00085 
00086 public:
00087 
00088     Label();
00089 
00090     Label( const Label &label );
00091 
00092     Label( const std::string &text );
00093 
00094     ~Label();
00095     
00096     Label &operator=( const Label &label );
00097 
00100     void set_font_size( double size );
00101 
00104     void set_font_family( const std::string &family );
00105 
00108     void set_font_slant(cairo_font_slant_t slant );
00109     
00112     void set_font_weight( cairo_font_weight_t weight );
00113 
00116     void set_color( const Color &color );
00117 
00120     void set_location( double x, double y );
00121 
00127     void set_rotation( double angle );
00128 
00142     void set_alignment( double x, double y, bool yzeroext = false );
00143 
00146     void set_text( const std::string &text );
00147 
00150     std::string get_text( void ) const;
00151 
00154     void draw( cairo_t *cairo );
00155 
00160     void get_extents( cairo_t *cairo, cairo_text_extents_t *extents );
00161 
00168     void get_bbox( cairo_t *cairo, double bbox[4] );
00169 
00170     friend std::ostream &operator<<( std::ostream &os, const Label &label );
00171 };
00172 
00173 
00174 #endif
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