return two iterators into the Bars|Beats list of the tempo map rather than making...
[ardour.git] / gtk2_ardour / tempo_lines.h
1 /*
2     Copyright (C) 2000-2007 Paul Davis
3
4     This program is free software; you can redistribute it and/or modify
5     it under the terms of the GNU General Public License as published by
6     the Free Software Foundation; either version 2 of the License, or
7     (at your option) any later version.
8
9     This program is distributed in the hope that it will be useful,
10     but WITHOUT ANY WARRANTY; without even the implied warranty of
11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12     GNU General Public License for more details.
13
14     You should have received a copy of the GNU General Public License
15     along with this program; if not, write to the Free Software
16     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
17 */
18
19 #ifndef __ardour_tempo_lines_h__
20 #define __ardour_tempo_lines_h__
21
22 #include <map>
23 #include <boost/pool/pool.hpp>
24 #include <boost/pool/pool_alloc.hpp>
25 #include "ardour/tempo.h"
26 #include "canvas.h"
27 #include "simpleline.h"
28
29 typedef boost::fast_pool_allocator<
30                 std::pair<const double, ArdourCanvas::SimpleLine*>,
31                 boost::default_user_allocator_new_delete,
32                 boost::details::pool::null_mutex,
33                 8192>
34         MapAllocator;
35
36 class TempoLines {
37 public:
38         TempoLines(ArdourCanvas::Canvas& canvas, ArdourCanvas::Group* group, double screen_height);
39
40         void tempo_map_changed();
41
42         void draw(const ARDOUR::TempoMap::BBTPointList::const_iterator& begin, 
43                   const ARDOUR::TempoMap::BBTPointList::const_iterator& end, 
44                   double frames_per_unit);
45
46         void show();
47         void hide();
48
49 private:
50         typedef std::map<double, ArdourCanvas::SimpleLine*, std::less<double>, MapAllocator> Lines;
51         Lines _lines;
52
53         ArdourCanvas::Canvas& _canvas;
54         ArdourCanvas::Group*  _group;
55         double                _clean_left;
56         double                _clean_right;
57         double                _height;
58 };
59
60 #endif /* __ardour_tempo_lines_h__ */