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         set_uses_gain_mapping (true);
  55         terminal_points_can_slide = false;
  56 }
  57
  58 void
  59 AudioRegionGainLine::start_drag_single (ControlPoint* cp, double x, float fraction)
  60 {
  61         AutomationLine::start_drag_single (cp, x, fraction);
  62
  63         // XXX Stateful need to capture automation curve data
  64
  65         if (!rv.audio_region()->envelope_active()) {
  66                 trackview.session()->add_command(new MementoCommand<AudioRegion>(*(rv.audio_region().get()), &rv.audio_region()->get_state(), 0));
  67                 rv.audio_region()->set_envelope_active(false);
  68         }
  69 }
  70
  71 // This is an extended copy from AutomationList
  72 void
  73 AudioRegionGainLine::remove_point (ControlPoint& cp)
  74 {
  75         trackview.editor().begin_reversible_command (_("remove control point"));
  76         XMLNode &before = alist->get_state();
  77
  78         if (!rv.audio_region()->envelope_active()) {
  79                 rv.audio_region()->clear_changes ();
  80                 rv.audio_region()->set_envelope_active(true);
  81                 trackview.session()->add_command(new StatefulDiffCommand (rv.audio_region()));
  82         }
  83
  84         trackview.editor ().get_selection ().clear_points ();
  85         alist->erase (cp.model());
  86
  87         trackview.editor().session()->add_command (new MementoCommand<AutomationList>(*alist.get(), &before, &alist->get_state()));
  88         trackview.editor().commit_reversible_command ();
  89         trackview.editor().session()->set_dirty ();
  90 }
  91
  92 void
  93 AudioRegionGainLine::end_drag (bool with_push, uint32_t final_index)
  94 {
  95         if (!rv.audio_region()->envelope_active()) {
  96                 rv.audio_region()->set_envelope_active(true);
  97                 trackview.session()->add_command(new MementoCommand<AudioRegion>(*(rv.audio_region().get()), 0, &rv.audio_region()->get_state()));
  98         }
  99
 100         AutomationLine::end_drag (with_push, final_index);
 101 }
 102
 103 void
 104 AudioRegionGainLine::region_changed (const PropertyChange& what_changed)
 105 {
 106         PropertyChange interesting_stuff;
 107
 108         interesting_stuff.add (ARDOUR::Properties::start);
 109         interesting_stuff.add (ARDOUR::Properties::position);
 110
 111         if (what_changed.contains (interesting_stuff)) {
 112                 _time_converter->set_origin_b (rv.region()->position());
 113         }
 114 }