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/*
* Copyright (C) 2014 Paul Davis <paul@linuxaudiosystems.com>
* Copyright (C) 2015-2017 Robin Gareus <robin@gareus.org>
*
* 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.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifndef __CANVAS_RULER_H__
#define __CANVAS_RULER_H__
#include <string>
#include <vector>
#include <pangomm/fontdescription.h>
#include "canvas/rectangle.h"
namespace ArdourCanvas
{
class LIBCANVAS_API Ruler : public Rectangle
{
public:
struct Mark {
enum Style {
Major,
Minor,
Micro
};
std::string label;
double position;
Style style;
};
struct Metric {
Metric () : units_per_pixel (0) {}
virtual ~Metric() {}
double units_per_pixel;
/* lower and upper and sample positions, which are also canvas coordinates
*/
virtual void get_marks (std::vector<Mark>&, double lower, double upper, int maxchars) const = 0;
};
Ruler (Canvas*, const Metric& m);
Ruler (Canvas*, const Metric& m, Rect const&);
Ruler (Item*, const Metric& m);
Ruler (Item*, const Metric& m, Rect const&);
virtual ~Ruler () {
delete _font_description;
}
void set_range (double lower, double upper);
void set_font_description (Pango::FontDescription);
void set_metric (const Metric&);
void render (Rect const & area, Cairo::RefPtr<Cairo::Context>) const;
void set_divide_colors (Gtkmm2ext::Color top, Gtkmm2ext::Color bottom);
void set_divide_height (double);
private:
const Metric* _metric;
/* lower and upper and sample positions, which are also canvas coordinates */
Coord _lower;
Coord _upper;
double _divide_height;
Gtkmm2ext::Color _divider_color_top;
Gtkmm2ext::Color _divider_color_bottom;
Pango::FontDescription* _font_description;
mutable std::vector<Mark> marks;
mutable bool _need_marks;
};
}
#endif
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