gtk2_ardour/automation_controller.cc

   1 /*
   2     Copyright (C) 2007 Paul Davis
   3     Author: Dave Robillard
   4
   5     This program is free software; you can redistribute it and/or modify
   6     it under the terms of the GNU General Public License as published by
   7     the Free Software Foundation; either version 2 of the License, or
   8     (at your option) any later version.
   9
  10     This program is distributed in the hope that it will be useful,
  11     but WITHOUT ANY WARRANTY; without even the implied warranty of
  12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13     GNU General Public License for more details.
  14
  15     You should have received a copy of the GNU General Public License
  16     along with this program; if not, write to the Free Software
  17     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  18
  19 */
  20
  21 #include <iomanip>
  22 #include "pbd/error.h"
  23 #include "ardour/automation_list.h"
  24 #include "ardour/automation_control.h"
  25 #include "ardour/event_type_map.h"
  26 #include "ardour/automatable.h"
  27 #include "ardour_ui.h"
  28 #include "utils.h"
  29 #include "automation_controller.h"
  30 #include "gui_thread.h"
  31
  32 #include "i18n.h"
  33
  34 using namespace ARDOUR;
  35 using namespace Gtk;
  36
  37
  38 AutomationController::AutomationController(boost::shared_ptr<AutomationControl> ac, Adjustment* adj)
  39         : BarController (*adj, ac)
  40         , _ignore_change(false)
  41         , _controllable(ac)
  42         , _adjustment(adj)
  43 {
  44         set_name (X_("PluginSlider")); // FIXME: get yer own name!
  45         set_style (BarController::LeftToRight);
  46         set_use_parent (true);
  47
  48         StartGesture.connect (sigc::mem_fun(*this, &AutomationController::start_touch));
  49         StopGesture.connect (sigc::mem_fun(*this, &AutomationController::end_touch));
  50
  51         _adjustment->signal_value_changed().connect (
  52                         sigc::mem_fun(*this, &AutomationController::value_adjusted));
  53
  54         _screen_update_connection = ARDOUR_UI::RapidScreenUpdate.connect (
  55                         sigc::mem_fun (*this, &AutomationController::display_effective_value));
  56
  57         ac->Changed.connect (_changed_connection, invalidator (*this), boost::bind (&AutomationController::value_changed, this), gui_context());
  58 }
  59
  60 AutomationController::~AutomationController()
  61 {
  62 }
  63
  64 boost::shared_ptr<AutomationController>
  65 AutomationController::create(
  66                 boost::shared_ptr<Automatable> parent,
  67                 const Evoral::Parameter& param,
  68                 boost::shared_ptr<AutomationControl> ac)
  69 {
  70         Gtk::Adjustment* adjustment = manage(new Gtk::Adjustment(param.normal(), param.min(), param.max()));
  71         if (!ac) {
  72                 PBD::warning << "Creating AutomationController for " << EventTypeMap::instance().to_symbol(param) << endmsg;
  73                 ac = boost::dynamic_pointer_cast<AutomationControl>(parent->control_factory(param));
  74         } else {
  75                 assert(ac->parameter() == param);
  76         }
  77         return boost::shared_ptr<AutomationController>(new AutomationController(ac, adjustment));
  78 }
  79
  80 std::string
  81 AutomationController::get_label (int&)
  82 {
  83         std::stringstream s;
  84
  85         // Hack to display CC rounded to int
  86         if (_controllable->parameter().type() == MidiCCAutomation) {
  87                 s << (int)_controllable->get_value();
  88         } else {
  89                 s << std::fixed << std::setprecision(3) << _controllable->get_value();
  90         }
  91
  92         return s.str ();
  93 }
  94
  95 void
  96 AutomationController::display_effective_value()
  97 {
  98         //if ( ! _controllable->list()->automation_playback())
  99         //      return;
 100
 101         float value = _controllable->get_value();
 102
 103         if (_adjustment->get_value() != value) {
 104                 _ignore_change = true;
 105                 _adjustment->set_value (value);
 106                 _ignore_change = false;
 107         }
 108 }
 109
 110 void
 111 AutomationController::value_adjusted()
 112 {
 113         if (!_ignore_change) {
 114                 _controllable->set_value(_adjustment->get_value());
 115         }
 116 }
 117
 118 void
 119 AutomationController::start_touch()
 120 {
 121         _controllable->start_touch();
 122 }
 123
 124 void
 125 AutomationController::end_touch()
 126 {
 127         _controllable->stop_touch();
 128 }
 129
 130 void
 131 AutomationController::automation_state_changed ()
 132 {
 133         ENSURE_GUI_THREAD (*this, &AutomationController::automation_state_changed)
 134
 135         bool x = (_controllable->automation_state() != Off);
 136
 137         /* start watching automation so that things move */
 138
 139         _screen_update_connection.disconnect();
 140
 141         if (x) {
 142                 _screen_update_connection = ARDOUR_UI::RapidScreenUpdate.connect (
 143                                 sigc::mem_fun (*this, &AutomationController::display_effective_value));
 144         }
 145 }
 146
 147 void
 148 AutomationController::value_changed ()
 149 {
 150         Gtkmm2ext::UI::instance()->call_slot (invalidator (*this), boost::bind (&AutomationController::display_effective_value, this));
 151 }
 152
 153 /** Stop updating our value from our controllable */
 154 void
 155 AutomationController::stop_updating ()
 156 {
 157         _screen_update_connection.disconnect ();
 158 }