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livetrax/gtk2_ardour/region_gain_line.cc
Paul Davis 49240fe7c5 Draw all automation points, rather than trying to use a heuristic to show some
at any given zoom level. 

This works because (1) automation data is obtained by sampling, and we control
the sampling interval (2) automation data is filtered to remove co-linear
points before becoming part of a ControlList. 

This commit removes some of the hairiest code in Ardour's GUI, which was
responsible for figuring out which invisible control points were affected by an
edit. The change is based on an experiment in mixbus done by Ben Loftis.


git-svn-id: svn://localhost/ardour2/branches/3.0@11798 d708f5d6-7413-0410-9779-e7cbd77b26cf
2012-04-05 16:53:55 +00:00

100 lines
3.1 KiB
C++

/*
Copyright (C) 2000-2007 Paul Davis
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "evoral/Curve.hpp"
#include "pbd/memento_command.h"
#include "pbd/stateful_diff_command.h"
#include "ardour/audioregion.h"
#include "ardour/session.h"
#include "control_point.h"
#include "region_gain_line.h"
#include "audio_region_view.h"
#include "utils.h"
#include "time_axis_view.h"
#include "editor.h"
#include "i18n.h"
using namespace std;
using namespace ARDOUR;
using namespace PBD;
AudioRegionGainLine::AudioRegionGainLine (const string & name, AudioRegionView& r, ArdourCanvas::Group& parent, boost::shared_ptr<AutomationList> l)
: AutomationLine (name, r.get_time_axis_view(), parent, l)
, rv (r)
{
// If this isn't true something is horribly wrong, and we'll get catastrophic gain values
assert(l->parameter().type() == EnvelopeAutomation);
_time_converter->set_origin_b (r.region()->position() - r.region()->start());
group->raise_to_top ();
group->property_y() = 2;
set_uses_gain_mapping (true);
terminal_points_can_slide = false;
}
void
AudioRegionGainLine::start_drag_single (ControlPoint* cp, double x, float fraction)
{
AutomationLine::start_drag_single (cp, x, fraction);
// XXX Stateful need to capture automation curve data
if (!rv.audio_region()->envelope_active()) {
trackview.session()->add_command(new MementoCommand<AudioRegion>(*(rv.audio_region().get()), &rv.audio_region()->get_state(), 0));
rv.audio_region()->set_envelope_active(false);
}
}
// This is an extended copy from AutomationList
void
AudioRegionGainLine::remove_point (ControlPoint& cp)
{
trackview.editor().session()->begin_reversible_command (_("remove control point"));
XMLNode &before = alist->get_state();
if (!rv.audio_region()->envelope_active()) {
rv.audio_region()->clear_changes ();
rv.audio_region()->set_envelope_active(true);
trackview.session()->add_command(new StatefulDiffCommand (rv.audio_region()));
}
alist->erase (cp.model());
trackview.editor().session()->add_command (new MementoCommand<AutomationList>(*alist.get(), &before, &alist->get_state()));
trackview.editor().session()->commit_reversible_command ();
trackview.editor().session()->set_dirty ();
}
void
AudioRegionGainLine::end_drag ()
{
if (!rv.audio_region()->envelope_active()) {
rv.audio_region()->set_envelope_active(true);
trackview.session()->add_command(new MementoCommand<AudioRegion>(*(rv.audio_region().get()), 0, &rv.audio_region()->get_state()));
}
AutomationLine::end_drag ();
}