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/*
Copyright (C) 2014 Carl Hetherington <cth@carlh.net>
This program is free software; you can redistribute it 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 program 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 program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifndef LIBSUB_FONT_SIZE_H
#define LIBSUB_FONT_SIZE_H
#include <boost/optional.hpp>
namespace sub {
/** @class FontSize
* @brief A description of a font's size in one of a number of ways.
*
* An object of this class holds a font's size in one way, and it can convert
* to another on supply of the required conversion parameters.
*/
class FontSize
{
public:
void set_proportional (float p) {
_proportional = p;
}
void set_points (int p) {
_points = p;
}
boost::optional<float> proportional () const {
return _proportional;
}
boost::optional<int> points () const {
return _points;
}
float proportional (int screen_height_in_points) const;
int points (int screen_height_in_points) const;
static FontSize from_points (int p);
private:
/** as a proportion of screen height */
boost::optional<float> _proportional;
/** in points */
boost::optional<int> _points;
};
}
#endif
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