gtk2_ardour/region_gain_line.cc

   1 #include <ardour/curve.h>
   2 #include <ardour/audioregion.h>
   3
   4 #include "region_gain_line.h"
   5 #include "regionview.h"
   6 #include "utils.h"
   7
   8 #include "time_axis_view.h"
   9 #include "editor.h"
  10
  11 #include <ardour/session.h>
  12
  13
  14 #include "i18n.h"
  15
  16
  17 using namespace std;
  18 using namespace ARDOUR;
  19 using namespace PBD;
  20
  21 AudioRegionGainLine::AudioRegionGainLine (const string & name, Session& s, AudioRegionView& r, ArdourCanvas::Group& parent, Curve& c)
  22   : AutomationLine (name, r.get_time_axis_view(), parent, c),
  23           session (s),
  24           rv (r)
  25 {
  26         group->raise_to_top ();
  27         set_verbose_cursor_uses_gain_mapping (true);
  28         terminal_points_can_slide = false;
  29 }
  30
  31 void
  32 AudioRegionGainLine::view_to_model_y (double& y)
  33 {
  34         y = slider_position_to_gain (y);
  35         y = max (0.0, y);
  36         y = min (2.0, y);
  37 }
  38
  39 void
  40 AudioRegionGainLine::model_to_view_y (double& y)
  41 {
  42         y = gain_to_slider_position (y);
  43 }
  44
  45 void
  46 AudioRegionGainLine::start_drag (ControlPoint* cp, float fraction)
  47 {
  48         AutomationLine::start_drag(cp,fraction);
  49         if (!rv.region.envelope_active()) {
  50                 trackview.session().add_command(MementoUndoCommand<AudioRegion>(rv.region, rv.region.get_state()));
  51                 rv.region.set_envelope_active(false);
  52         }
  53 }
  54
  55 // This is an extended copy from AutomationList
  56 void
  57 AudioRegionGainLine::remove_point (ControlPoint& cp)
  58 {
  59         ModelRepresentation mr;
  60
  61         model_representation (cp, mr);
  62
  63         trackview.editor.current_session()->begin_reversible_command (_("remove control point"));
  64         XMLNode &before = get_state();
  65
  66         if (!rv.region.envelope_active()) {
  67                 XMLNode &before = rv.region.get_state();
  68                 rv.region.set_envelope_active(true);
  69                 XMLNode &after = rv.region.get_state();
  70                 trackview.session().add_command(MementoCommand<AudioRegion>(rv.region, before, after));
  71         }
  72
  73         alist.erase (mr.start, mr.end);
  74
  75         trackview.editor.current_session()->add_command (MementoCommand<AudioRegionGainLine>(*this, before, get_state()));
  76         trackview.editor.current_session()->commit_reversible_command ();
  77         trackview.editor.current_session()->set_dirty ();
  78 }
  79
  80 void
  81 AudioRegionGainLine::end_drag (ControlPoint* cp)
  82 {
  83         if (!rv.region.envelope_active()) {
  84                 rv.region.set_envelope_active(true);
  85                 trackview.session().add_command(MementoRedoCommand<AudioRegion>(rv.region, rv.region.get_state()));
  86         }
  87         AutomationLine::end_drag(cp);
  88 }
  89
  90
  91 // This is a copy from AutomationList
  92 UndoAction
  93 AudioRegionGainLine::get_memento ()
  94 {
  95         return alist.get_memento();
  96 }