gtk2_ardour/gain_automation_time_axis.cc

   1 /*
   2     Copyright (C) 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 <ardour/curve.h>
  21 #include <ardour/route.h>
  22 #include <pbd/memento_command.h>
  23
  24 #include "gain_automation_time_axis.h"
  25 #include "automation_line.h"
  26 #include "canvas.h"
  27
  28 #include "i18n.h"
  29
  30 using namespace ARDOUR;
  31 using namespace PBD;
  32 using namespace Gtk;
  33
  34 GainAutomationTimeAxisView::GainAutomationTimeAxisView (Session& s, boost::shared_ptr<Route> r,
  35                                                         PublicEditor& e, TimeAxisView& parent,
  36                                                         ArdourCanvas::Canvas& canvas, const string & n, ARDOUR::Curve& c)
  37
  38         : AxisView (s),
  39           AutomationTimeAxisView (s, r, e, parent, canvas, n, X_("gain"), ""),
  40           curve (c)
  41
  42 {
  43 }
  44
  45 GainAutomationTimeAxisView::~GainAutomationTimeAxisView ()
  46 {
  47 }
  48
  49 void
  50 GainAutomationTimeAxisView::add_automation_event (ArdourCanvas::Item* item, GdkEvent* event, nframes_t when, double y)
  51 {
  52         double x = 0;
  53
  54         canvas_display->w2i (x, y);
  55
  56         /* compute vertical fractional position */
  57
  58         y = 1.0 - (y / height);
  59
  60         /* map using line */
  61
  62         lines.front()->view_to_model_y (y);
  63
  64         _session.begin_reversible_command (_("add gain automation event"));
  65         XMLNode& before = curve.get_state();
  66         curve.add (when, y);
  67         XMLNode& after = curve.get_state();
  68         _session.commit_reversible_command (new MementoCommand<ARDOUR::Curve>(curve, &before, &after));
  69         _session.set_dirty ();
  70 }
  71
  72 void
  73 GainAutomationTimeAxisView::set_automation_state (AutoState state)
  74 {
  75         if (!ignore_state_request) {
  76                 route->set_gain_automation_state (state);
  77         }
  78 }