label.hpp

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/* Copyright (c) 2005-2010 Taneli Kalvas. All rights reserved.
 *
 * You can redistribute this software and/or modify it under the terms
 * of the GNU General Public License as published by the Free Software
 * Foundation; either version 2 of the License, or (at your option)
 * any later version.
 * 
 * This library is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this library (file "COPYING" included in the package);
 * if not, write to the Free Software Foundation, Inc., 51 Franklin
 * Street, Fifth Floor, Boston, MA 02110-1301 USA
 * 
 * If you have questions about your rights to use or distribute this
 * software, please contact Berkeley Lab's Technology Transfer
 * Department at TTD@lbl.gov. Other questions, comments and bug
 * reports should be sent directly to the author via email at
 * taneli.kalvas@jyu.fi.
 * 
 * NOTICE. This software was developed under partial funding from the
 * U.S.  Department of Energy.  As such, the U.S. Government has been
 * granted for itself and others acting on its behalf a paid-up,
 * nonexclusive, irrevocable, worldwide license in the Software to
 * reproduce, prepare derivative works, and perform publicly and
 * display publicly.  Beginning five (5) years after the date
 * permission to assert copyright is obtained from the U.S. Department
 * of Energy, and subject to any subsequent five (5) year renewals,
 * the U.S. Government is granted for itself and others acting on its
 * behalf a paid-up, nonexclusive, irrevocable, worldwide license in
 * the Software to reproduce, prepare derivative works, distribute
 * copies to the public, perform publicly and display publicly, and to
 * permit others to do so.
 */

#ifndef LABEL_HPP
#define LABEL_HPP 1


#include <string>
#include <cairo.h>

#include "color.hpp"


class Label
{
    std::string          _text;      
    double               _size;      
    std::string          _family;    
    cairo_font_slant_t   _slant;     
    cairo_font_weight_t  _weight;    
    Color                _color;     
    double               _xalign;    
    double               _yalign;    
    bool                 _yzeroext;  
    double               _rotation;  
    double               _xlocation; 
    double               _ylocation; 
    void process_parsed( cairo_t *cairo, const std::string &text, cairo_text_extents_t *extents0, 
                         double x0, double y0, double &x, double &y ) const;
    void parse_latex( cairo_t *cairo, const std::string &text, cairo_text_extents_t *extents0, 
                      double x0, double y0, double &x, double &y ) const;

public:

    Label();

    Label( const Label &label );

    Label( const std::string &text );

    ~Label();
    
    Label &operator=( const Label &label );

    void set_font_size( double size );

    double get_font_size( void ) const;

    void set_font_family( const std::string &family );

    void set_font_slant(cairo_font_slant_t slant );
    
    void set_font_weight( cairo_font_weight_t weight );

    void set_color( const Color &color );

    void set_location( double x, double y );

    void set_rotation( double angle );

    void set_alignment( double x, double y, bool yzeroext = false );

    void set_text( const std::string &text );

    std::string get_text( void ) const;

    void draw( cairo_t *cairo );

    void get_extents( cairo_t *cairo, cairo_text_extents_t *extents );

    void get_bbox( cairo_t *cairo, double bbox[4] ) const;

    friend std::ostream &operator<<( std::ostream &os, const Label &label );
};


#endif