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(ARDOUR::TempoMap::BBTPointList& points, double frames_per_unit);
  43
  44         void show();
  45         void hide();
  46
  47 private:
  48         typedef std::map<double, ArdourCanvas::SimpleLine*, std::less<double>, MapAllocator> Lines;
  49         Lines _lines;
  50
  51         ArdourCanvas::Canvas& _canvas;
  52         ArdourCanvas::Group*  _group;
  53         double                _clean_left;
  54         double                _clean_right;
  55         double                _height;
  56 };
  57
  58 #endif /* __ardour_tempo_lines_h__ */