merge with master.
[ardour.git] / 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
34 #include "i18n.h"
35
36 using namespace std;
37 using namespace ARDOUR;
38 using namespace PBD;
39
40 AudioRegionGainLine::AudioRegionGainLine (const string & name, AudioRegionView& r, ArdourCanvas::Container& parent, boost::shared_ptr<AutomationList> l)
41         : AutomationLine (name, r.get_time_axis_view(), parent, l)
42         , rv (r)
43 {
44         // If this isn't true something is horribly wrong, and we'll get catastrophic gain values
45         assert(l->parameter().type() == EnvelopeAutomation);
46
47         _time_converter->set_origin_b (r.region()->position() - r.region()->start());
48
49         group->raise_to_top ();
50         group->set_y_position (2);
51         set_uses_gain_mapping (true);
52         terminal_points_can_slide = false;
53 }
54
55 void
56 AudioRegionGainLine::start_drag_single (ControlPoint* cp, double x, float fraction)
57 {
58         AutomationLine::start_drag_single (cp, x, fraction);
59
60         // XXX Stateful need to capture automation curve data
61
62         if (!rv.audio_region()->envelope_active()) {
63                 trackview.session()->add_command(new MementoCommand<AudioRegion>(*(rv.audio_region().get()), &rv.audio_region()->get_state(), 0));
64                 rv.audio_region()->set_envelope_active(false);
65         }
66 }
67
68 // This is an extended copy from AutomationList
69 void
70 AudioRegionGainLine::remove_point (ControlPoint& cp)
71 {
72         trackview.editor().session()->begin_reversible_command (_("remove control point"));
73         XMLNode &before = alist->get_state();
74
75         if (!rv.audio_region()->envelope_active()) {
76                 rv.audio_region()->clear_changes ();
77                 rv.audio_region()->set_envelope_active(true);
78                 trackview.session()->add_command(new StatefulDiffCommand (rv.audio_region()));
79         }
80
81         alist->erase (cp.model());
82
83         trackview.editor().session()->add_command (new MementoCommand<AutomationList>(*alist.get(), &before, &alist->get_state()));
84         trackview.editor().session()->commit_reversible_command ();
85         trackview.editor().session()->set_dirty ();
86 }
87
88 void
89 AudioRegionGainLine::end_drag (bool with_push, uint32_t final_index)
90 {
91         if (!rv.audio_region()->envelope_active()) {
92                 rv.audio_region()->set_envelope_active(true);
93                 trackview.session()->add_command(new MementoCommand<AudioRegion>(*(rv.audio_region().get()), 0, &rv.audio_region()->get_state()));
94         }
95
96         AutomationLine::end_drag (with_push, final_index);
97 }
98