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         controllable_value_changed ();
  54 }
  55
  56 void
  57 VolumeController::controllable_value_changed ()
  58 {
  59         boost::shared_ptr<PBD::Controllable> c = controllable();
  60         if (c) {
  61                 get_adjustment()->set_value (gain_to_slider_position (c->get_value ()));
  62         }
  63 }
  64
  65 void
  66 VolumeController::adjustment_value_changed ()
  67 {
  68         boost::shared_ptr<PBD::Controllable> c = controllable();
  69         if (c) {
  70                 c->set_value (slider_position_to_gain (get_adjustment()->get_value()));
  71         }
  72 }
  73
  74