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 <ardour/curve.h>
  21 #include <ardour/audioregion.h>
  22 #include <pbd/memento_command.h>
  23
  24 #include "region_gain_line.h"
  25 #include "audio_region_view.h"
  26 #include "utils.h"
  27
  28 #include "time_axis_view.h"
  29 #include "editor.h"
  30
  31 #include <ardour/session.h>
  32
  33
  34 #include "i18n.h"
  35
  36
  37 using namespace std;
  38 using namespace ARDOUR;
  39 using namespace PBD;
  40
  41 AudioRegionGainLine::AudioRegionGainLine (const string & name, Session& s, AudioRegionView& r, ArdourCanvas::Group& parent, Curve& c)
  42   : AutomationLine (name, r.get_time_axis_view(), parent, c),
  43           session (s),
  44           rv (r)
  45 {
  46         group->raise_to_top ();
  47         group->property_y() = 2;
  48         set_verbose_cursor_uses_gain_mapping (true);
  49         terminal_points_can_slide = false;
  50 }
  51
  52 void
  53 AudioRegionGainLine::view_to_model_y (double& y)
  54 {
  55         y = slider_position_to_gain (y);
  56         y = max (0.0, y);
  57         y = min (2.0, y);
  58 }
  59
  60 void
  61 AudioRegionGainLine::model_to_view_y (double& y)
  62 {
  63         if (y < 0) y = 0;
  64
  65         y = gain_to_slider_position (y);
  66 }
  67
  68 void
  69 AudioRegionGainLine::start_drag (ControlPoint* cp, nframes_t x, float fraction)
  70 {
  71         AutomationLine::start_drag (cp, x, fraction);
  72         if (!rv.audio_region()->envelope_active()) {
  73                 trackview.session().add_command(new MementoCommand<AudioRegion>(*(rv.audio_region().get()), &rv.audio_region()->get_state(), 0));
  74                 rv.audio_region()->set_envelope_active(false);
  75         }
  76 }
  77
  78 // This is an extended copy from AutomationList
  79 void
  80 AudioRegionGainLine::remove_point (ControlPoint& cp)
  81 {
  82         ModelRepresentation mr;
  83
  84         model_representation (cp, mr);
  85
  86         trackview.editor.current_session()->begin_reversible_command (_("remove control point"));
  87         XMLNode &before = alist.get_state();
  88
  89         if (!rv.audio_region()->envelope_active()) {
  90                 XMLNode &region_before = rv.audio_region()->get_state();
  91                 rv.audio_region()->set_envelope_active(true);
  92                 XMLNode &region_after = rv.audio_region()->get_state();
  93                 trackview.session().add_command(new MementoCommand<AudioRegion>(*(rv.audio_region().get()), &region_before, &region_after));
  94         }
  95
  96         alist.erase (mr.start, mr.end);
  97
  98         trackview.editor.current_session()->add_command (new MementoCommand<AutomationList>(alist, &before, &alist.get_state()));
  99         trackview.editor.current_session()->commit_reversible_command ();
 100         trackview.editor.current_session()->set_dirty ();
 101 }
 102
 103 void
 104 AudioRegionGainLine::end_drag (ControlPoint* cp)
 105 {
 106         if (!rv.audio_region()->envelope_active()) {
 107                 rv.audio_region()->set_envelope_active(true);
 108                 trackview.session().add_command(new MementoCommand<AudioRegion>(*(rv.audio_region().get()), 0, &rv.audio_region()->get_state()));
 109         }
 110
 111         AutomationLine::end_drag(cp);
 112 }
 113
 114