gtk2_ardour/region_gain_line.cc

   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
  20 #include "evoral/Curve.hpp"
  21 #include "pbd/memento_command.h"
  22 #include "pbd/stateful_diff_command.h"
  23
  24 #include "ardour/audioregion.h"
  25 #include "ardour/session.h"
  26
  27 #include "region_gain_line.h"
  28 #include "audio_region_view.h"
  29 #include "utils.h"
  30
  31 #include "time_axis_view.h"
  32 #include "editor.h"
  33
  34 #include "i18n.h"
  35
  36 using namespace std;
  37 using namespace ARDOUR;
  38 using namespace PBD;
  39
  40 AudioRegionGainLine::AudioRegionGainLine (const string & name, AudioRegionView& r, ArdourCanvas::Group& parent, boost::shared_ptr<AutomationList> l)
  41         : AutomationLine (name, r.get_time_axis_view(), parent, l)
  42         , rv (r)
  43 {
  44         // If this isn't true something is horribly wrong, and we'll get catastrophic gain values
  45         assert(l->parameter().type() == EnvelopeAutomation);
  46
  47         group->raise_to_top ();
  48         group->property_y() = 2;
  49         set_uses_gain_mapping (true);
  50         terminal_points_can_slide = false;
  51 }
  52
  53 void
  54 AudioRegionGainLine::start_drag_single (ControlPoint* cp, double x, float fraction)
  55 {
  56         AutomationLine::start_drag_single (cp, x, fraction);
  57
  58         // XXX Stateful need to capture automation curve data
  59
  60         if (!rv.audio_region()->envelope_active()) {
  61                 trackview.session()->add_command(new MementoCommand<AudioRegion>(*(rv.audio_region().get()), &rv.audio_region()->get_state(), 0));
  62                 rv.audio_region()->set_envelope_active(false);
  63         }
  64 }
  65
  66 // This is an extended copy from AutomationList
  67 void
  68 AudioRegionGainLine::remove_point (ControlPoint& cp)
  69 {
  70         ModelRepresentation mr;
  71
  72         model_representation (cp, mr);
  73
  74         trackview.editor().session()->begin_reversible_command (_("remove control point"));
  75         XMLNode &before = alist->get_state();
  76
  77         if (!rv.audio_region()->envelope_active()) {
  78                 rv.audio_region()->clear_changes ();
  79                 rv.audio_region()->set_envelope_active(true);
  80                 trackview.session()->add_command(new StatefulDiffCommand (rv.audio_region()));
  81         }
  82
  83         alist->erase (mr.start, mr.end);
  84
  85         trackview.editor().session()->add_command (new MementoCommand<AutomationList>(*alist.get(), &before, &alist->get_state()));
  86         trackview.editor().session()->commit_reversible_command ();
  87         trackview.editor().session()->set_dirty ();
  88 }
  89
  90 void
  91 AudioRegionGainLine::end_drag ()
  92 {
  93         if (!rv.audio_region()->envelope_active()) {
  94                 rv.audio_region()->set_envelope_active(true);
  95                 trackview.session()->add_command(new MementoCommand<AudioRegion>(*(rv.audio_region().get()), 0, &rv.audio_region()->get_state()));
  96         }
  97
  98         AutomationLine::end_drag ();
  99 }
 100