gtk2_ardour/automation_gain_line.cc

   1 /*
   2     Copyright (C) 2000-2003 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
  20 #include <sigc++/signal.h>
  21
  22 #include <ardour/curve.h>
  23 #include <pbd/fastlog.h>
  24
  25 #include "public_editor.h"
  26 #include "automation_gain_line.h"
  27 #include "utils.h"
  28
  29 #include <ardour/session.h>
  30
  31 using namespace std;
  32 using namespace ARDOUR;
  33 using namespace PBD;
  34
  35 AutomationGainLine::AutomationGainLine (const string & name, Session& s, TimeAxisView& tv, ArdourCanvas::Group& parent, Curve& c)
  36
  37         : AutomationLine (name, tv, parent, c),
  38           session (s)
  39 {
  40         set_verbose_cursor_uses_gain_mapping (true);
  41 }
  42
  43 void
  44 AutomationGainLine::view_to_model_y (double& y)
  45 {
  46         y = slider_position_to_gain (y);
  47         y = max (0.0, y);
  48         y = min (2.0, y);
  49 }
  50
  51 void
  52 AutomationGainLine::model_to_view_y (double& y)
  53 {
  54         if (y < 0) y = 0;
  55
  56         y = gain_to_slider_position (y);
  57 }
  58
  59
  60