Desensitize playlist menu with >1 selected tracks.
[ardour.git] / gtk2_ardour / volume_controller.cc
1 /*
2     Copyright (C) 1998-2007 Paul Davis
3     This program is free software; you can redistribute it and/or modify
4     it under the terms of the GNU General Public License as published by
5     the Free Software Foundation; either version 2 of the License, or
6     (at your option) any later version.
7
8     This program is distributed in the hope that it will be useful,
9     but WITHOUT ANY WARRANTY; without even the implied warranty of
10     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
11     GNU General Public License for more details.
12
13     You should have received a copy of the GNU General Public License
14     along with this program; if not, write to the Free Software
15     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
16
17     $Id: volume_controller.cc,v 1.4 2000/05/03 15:54:21 pbd Exp $
18 */
19
20 #include <string.h>
21 #include <limits.h>
22
23 #include "pbd/controllable.h"
24
25 #include "gtkmm2ext/gui_thread.h"
26 #include "ardour/utils.h"
27
28 #include "volume_controller.h"
29
30 using namespace Gtk;
31
32 VolumeController::VolumeController (Glib::RefPtr<Gdk::Pixbuf> p,
33                                     Gtk::Adjustment *adj,
34                                     bool with_numeric,
35                                     int subw, int subh)
36
37         : MotionFeedback (p, MotionFeedback::Rotary, "", adj, with_numeric, subw, subh)
38 {                         
39         get_adjustment()->signal_value_changed().connect (mem_fun (*this,&VolumeController::adjustment_value_changed));
40 }
41
42 void
43 VolumeController::set_controllable (boost::shared_ptr<PBD::Controllable> c)
44 {
45         MotionFeedback::set_controllable (c);
46
47         controllable_connection.disconnect ();
48
49         if (c) {
50                 c->Changed.connect (controllable_connection, MISSING_INVALIDATOR, boost::bind (&VolumeController::controllable_value_changed, this), gui_context());
51         }
52 }
53
54 void
55 VolumeController::controllable_value_changed ()
56 {
57         boost::shared_ptr<PBD::Controllable> c = controllable();
58         if (c) {
59                 get_adjustment()->set_value (gain_to_slider_position (c->get_value ()));
60         }
61 }
62
63 void
64 VolumeController::adjustment_value_changed ()
65 {
66         boost::shared_ptr<PBD::Controllable> c = controllable();
67         if (c) {
68                 c->set_value (slider_position_to_gain (get_adjustment()->get_value()));
69         }
70 }
71
72