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 "ardour/beats_frames_converter.h"
  23 #include "ardour/tempo.h"
  24
  25 #include "canvas/line_set.h"
  26
  27 class TempoLines {
  28 public:
  29         TempoLines (ArdourCanvas::Container* group, double screen_height, ARDOUR::BeatsFramesConverter* bfc);
  30
  31         void tempo_map_changed();
  32
  33         void draw (std::vector<ARDOUR::TempoMap::BBTPoint>& grid,
  34                    unsigned                                              divisions,
  35                    ARDOUR::framecnt_t                                    leftmost_frame,
  36                    ARDOUR::framecnt_t                                    frame_rate);
  37
  38         void show();
  39         void hide();
  40
  41 private:
  42         void draw_ticks (std::vector<ARDOUR::TempoMap::BBTPoint>& grid,
  43                          unsigned                                              divisions,
  44                          ARDOUR::framecnt_t                                    leftmost_frame,
  45                          ARDOUR::framecnt_t                                    frame_rate);
  46
  47         ArdourCanvas::LineSet lines;
  48         ARDOUR::BeatsFramesConverter* _bfc;
  49 };
  50
  51 #endif /* __ardour_tempo_lines_h__ */