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 "control_point.h"
  28 #include "region_gain_line.h"
  29 #include "audio_region_view.h"
  30
  31 #include "time_axis_view.h"
  32 #include "editor.h"
  33 #include "gui_thread.h"
  34
  35 #include "pbd/i18n.h"
  36
  37 using namespace std;
  38 using namespace ARDOUR;
  39 using namespace PBD;
  40
  41 AudioRegionGainLine::AudioRegionGainLine (const string & name, AudioRegionView& r, ArdourCanvas::Container& parent, boost::shared_ptr<AutomationList> l)
  42         : AutomationLine (name, r.get_time_axis_view(), parent, l, l->parameter())
  43         , rv (r)
  44 {
  45         // If this isn't true something is horribly wrong, and we'll get catastrophic gain values
  46         assert(l->parameter().type() == EnvelopeAutomation);
  47
  48         _time_converter->set_origin_b (rv.region()->position());
  49
  50         r.region()->PropertyChanged.connect (_region_changed_connection, invalidator (*this), boost::bind (&AudioRegionGainLine::region_changed, this, _1), gui_context());
  51
  52         group->raise_to_top ();
  53         group->set_y_position (2);
  54         terminal_points_can_slide = false;
  55 }
  56
  57 void
  58 AudioRegionGainLine::start_drag_single (ControlPoint* cp, double x, float fraction)
  59 {
  60         AutomationLine::start_drag_single (cp, x, fraction);
  61
  62         // XXX Stateful need to capture automation curve data
  63
  64         if (!rv.audio_region()->envelope_active()) {
  65                 trackview.session()->add_command(new MementoCommand<AudioRegion>(*(rv.audio_region().get()), &rv.audio_region()->get_state(), 0));
  66                 rv.audio_region()->set_envelope_active(false);
  67         }
  68 }
  69
  70 // This is an extended copy from AutomationList
  71 void
  72 AudioRegionGainLine::remove_point (ControlPoint& cp)
  73 {
  74         trackview.editor().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         trackview.editor ().get_selection ().clear_points ();
  84         alist->erase (cp.model());
  85
  86         trackview.editor().session()->add_command (new MementoCommand<AutomationList>(*alist.get(), &before, &alist->get_state()));
  87         trackview.editor().commit_reversible_command ();
  88         trackview.editor().session()->set_dirty ();
  89 }
  90
  91 void
  92 AudioRegionGainLine::end_drag (bool with_push, uint32_t final_index)
  93 {
  94         if (!rv.audio_region()->envelope_active()) {
  95                 rv.audio_region()->set_envelope_active(true);
  96                 trackview.session()->add_command(new MementoCommand<AudioRegion>(*(rv.audio_region().get()), 0, &rv.audio_region()->get_state()));
  97         }
  98
  99         AutomationLine::end_drag (with_push, final_index);
 100 }
 101
 102 void
 103 AudioRegionGainLine::region_changed (const PropertyChange& what_changed)
 104 {
 105         PropertyChange interesting_stuff;
 106
 107         interesting_stuff.add (ARDOUR::Properties::start);
 108         interesting_stuff.add (ARDOUR::Properties::position);
 109
 110         if (what_changed.contains (interesting_stuff)) {
 111                 _time_converter->set_origin_b (rv.region()->position());
 112         }
 113 }