merge with master, primarily for adrian's maximise-mixer change
[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 #include "utils.h"
31
32 #include "time_axis_view.h"
33 #include "editor.h"
34
35 #include "i18n.h"
36
37 using namespace std;
38 using namespace ARDOUR;
39 using namespace PBD;
40
41 AudioRegionGainLine::AudioRegionGainLine (const string & name, AudioRegionView& r, ArdourCanvas::Group& parent, boost::shared_ptr<AutomationList> l)
42         : AutomationLine (name, r.get_time_axis_view(), parent, l)
43         , rv (r)
44 {
45         // If this isn't true something is horribly wrong, and we'll get catastrophic gain values
46         assert(l->parameter().type() == EnvelopeAutomation);
47
48         _time_converter->set_origin_b (r.region()->position() - r.region()->start());
49
50         group->raise_to_top ();
51         group->set_y_position (2);
52         set_uses_gain_mapping (true);
53         terminal_points_can_slide = false;
54 }
55
56 void
57 AudioRegionGainLine::start_drag_single (ControlPoint* cp, double x, float fraction)
58 {
59         AutomationLine::start_drag_single (cp, x, fraction);
60
61         // XXX Stateful need to capture automation curve data
62
63         if (!rv.audio_region()->envelope_active()) {
64                 trackview.session()->add_command(new MementoCommand<AudioRegion>(*(rv.audio_region().get()), &rv.audio_region()->get_state(), 0));
65                 rv.audio_region()->set_envelope_active(false);
66         }
67 }
68
69 // This is an extended copy from AutomationList
70 void
71 AudioRegionGainLine::remove_point (ControlPoint& cp)
72 {
73         trackview.editor().session()->begin_reversible_command (_("remove control point"));
74         XMLNode &before = alist->get_state();
75
76         if (!rv.audio_region()->envelope_active()) {
77                 rv.audio_region()->clear_changes ();
78                 rv.audio_region()->set_envelope_active(true);
79                 trackview.session()->add_command(new StatefulDiffCommand (rv.audio_region()));
80         }
81
82         alist->erase (cp.model());
83
84         trackview.editor().session()->add_command (new MementoCommand<AutomationList>(*alist.get(), &before, &alist->get_state()));
85         trackview.editor().session()->commit_reversible_command ();
86         trackview.editor().session()->set_dirty ();
87 }
88
89 void
90 AudioRegionGainLine::end_drag (bool with_push, uint32_t final_index)
91 {
92         if (!rv.audio_region()->envelope_active()) {
93                 rv.audio_region()->set_envelope_active(true);
94                 trackview.session()->add_command(new MementoCommand<AudioRegion>(*(rv.audio_region().get()), 0, &rv.audio_region()->get_state()));
95         }
96
97         AutomationLine::end_drag (with_push, final_index);
98 }
99