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region_gain_line.cc

#include <ardour/curve.h>
#include <ardour/audioregion.h>

#include "region_gain_line.h"
#include "regionview.h"
#include "utils.h"

#include "time_axis_view.h"
#include "editor.h"

#include <ardour/session.h>


#include "i18n.h"


using namespace std;
using namespace ARDOUR;

AudioRegionGainLine::AudioRegionGainLine (string name, Session& s, AudioRegionView& r, GtkCanvasItem* parent,
                                Curve& c, 
                                gint (*point_callback)(GtkCanvasItem*, GdkEvent*, gpointer),
                                gint (*line_callback)(GtkCanvasItem*, GdkEvent*, gpointer))
      : AutomationLine (name, r.get_time_axis_view(), parent, c, point_callback, line_callback),
        session (s),
        rv (r)
{
      gtk_canvas_item_raise_to_top (group);
      set_verbose_cursor_uses_gain_mapping (true);
      terminal_points_can_slide = false;
}

void
AudioRegionGainLine::view_to_model_y (double& y)
{
      y = slider_position_to_gain (y);
      y = max (0.0, y);
      y = min (2.0, y);
}

void
AudioRegionGainLine::model_to_view_y (double& y)
{
      y = gain_to_slider_position (y);
}

void
AudioRegionGainLine::start_drag (ControlPoint* cp, float fraction) 
{
      AutomationLine::start_drag(cp,fraction);
      if (!rv.region.envelope_active()) {
            trackview.session().add_undo( bind( slot(rv.region, &AudioRegion::set_envelope_active), false) );
      }
}

// This is an extended copy from AutomationList
void
AudioRegionGainLine::remove_point (ControlPoint& cp)
{
      ModelRepresentation mr;

      model_representation (cp, mr);

      trackview.editor.current_session()->begin_reversible_command (_("remove control point"));
      trackview.editor.current_session()->add_undo (get_memento());

      if (!rv.region.envelope_active()) {
            trackview.session().add_undo( bind( slot(rv.region, &AudioRegion::set_envelope_active), false) );
            trackview.session().add_redo( bind( slot(rv.region, &AudioRegion::set_envelope_active), true) );
            rv.region.set_envelope_active(true);
      }

      alist.erase (mr.start, mr.end);

      trackview.editor.current_session()->add_redo_no_execute (get_memento());
      trackview.editor.current_session()->commit_reversible_command ();
      trackview.editor.current_session()->set_dirty ();
}

void
AudioRegionGainLine::end_drag (ControlPoint* cp) 
{
      if (!rv.region.envelope_active()) {
            trackview.session().add_redo( bind( slot(rv.region, &AudioRegion::set_envelope_active), true) );
            rv.region.set_envelope_active(true);
      }
      AutomationLine::end_drag(cp);
}


// This is a copy from AutomationList
UndoAction
AudioRegionGainLine::get_memento ()
{
      return alist.get_memento();
}

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