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 <cmath>
  23
  24 #include "pbd/error.h"
  25
  26 #include "ardour/automation_list.h"
  27 #include "ardour/automation_control.h"
  28 #include "ardour/event_type_map.h"
  29 #include "ardour/automatable.h"
  30 #include "ardour/panner.h"
  31 #include "ardour/pan_controllable.h"
  32 #include "ardour/session.h"
  33
  34 #include "ardour_ui.h"
  35 #include "utils.h"
  36 #include "automation_controller.h"
  37 #include "gui_thread.h"
  38
  39 #include "i18n.h"
  40
  41 using namespace ARDOUR;
  42 using namespace Gtk;
  43
  44 AutomationController::AutomationController(boost::shared_ptr<Automatable> owner, boost::shared_ptr<AutomationControl> ac, Adjustment* adj)
  45         : BarController (*adj, ac)
  46         , _ignore_change(false)
  47         , _owner (owner)
  48         , _controllable(ac)
  49         , _adjustment(adj)
  50 {
  51         set_name (X_("PluginSlider")); // FIXME: get yer own name!
  52         set_style (BarController::LeftToRight);
  53         set_use_parent (true);
  54
  55         StartGesture.connect (sigc::mem_fun(*this, &AutomationController::start_touch));
  56         StopGesture.connect (sigc::mem_fun(*this, &AutomationController::end_touch));
  57
  58         _adjustment->signal_value_changed().connect (
  59                         sigc::mem_fun(*this, &AutomationController::value_adjusted));
  60
  61         _screen_update_connection = ARDOUR_UI::RapidScreenUpdate.connect (
  62                         sigc::mem_fun (*this, &AutomationController::display_effective_value));
  63
  64         ac->Changed.connect (_changed_connection, invalidator (*this), boost::bind (&AutomationController::value_changed, this), gui_context());
  65 }
  66
  67 AutomationController::~AutomationController()
  68 {
  69 }
  70
  71 boost::shared_ptr<AutomationController>
  72 AutomationController::create(
  73                 boost::shared_ptr<Automatable> parent,
  74                 const Evoral::Parameter& param,
  75                 boost::shared_ptr<AutomationControl> ac)
  76 {
  77         Gtk::Adjustment* adjustment = manage(new Gtk::Adjustment(param.normal(), param.min(), param.max()));
  78         if (!ac) {
  79                 PBD::warning << "Creating AutomationController for " << EventTypeMap::instance().to_symbol(param) << endmsg;
  80                 ac = boost::dynamic_pointer_cast<AutomationControl>(parent->control_factory(param));
  81         } else {
  82                 assert(ac->parameter() == param);
  83         }
  84         return boost::shared_ptr<AutomationController>(new AutomationController(parent, ac, adjustment));
  85 }
  86
  87 std::string
  88 AutomationController::get_label (double& xpos)
  89 {
  90         xpos = 0.5;
  91         return _owner->value_as_string (_controllable);
  92 }
  93
  94 void
  95 AutomationController::display_effective_value()
  96 {
  97         float value = _controllable->get_value();
  98
  99         if (_adjustment->get_value() != value) {
 100                 _ignore_change = true;
 101                 _adjustment->set_value (value);
 102                 _ignore_change = false;
 103         }
 104 }
 105
 106 void
 107 AutomationController::value_adjusted()
 108 {
 109         if (!_ignore_change) {
 110                 _controllable->set_value(_adjustment->get_value());
 111         }
 112 }
 113
 114 void
 115 AutomationController::start_touch()
 116 {
 117         _controllable->start_touch (_controllable->session().transport_frame());
 118 }
 119
 120 void
 121 AutomationController::end_touch ()
 122 {
 123         if (_controllable->automation_state() == Touch) {
 124
 125                 bool mark = false;
 126                 double when = 0;
 127
 128                 if (_controllable->session().transport_rolling()) {
 129                         mark = true;
 130                         when = _controllable->session().transport_frame();
 131                 }
 132
 133                 _controllable->stop_touch (mark, when);
 134         }
 135 }
 136
 137 void
 138 AutomationController::automation_state_changed ()
 139 {
 140         ENSURE_GUI_THREAD (*this, &AutomationController::automation_state_changed)
 141
 142         bool x = (_controllable->automation_state() != Off);
 143
 144         /* start watching automation so that things move */
 145
 146         _screen_update_connection.disconnect();
 147
 148         if (x) {
 149                 _screen_update_connection = ARDOUR_UI::RapidScreenUpdate.connect (
 150                                 sigc::mem_fun (*this, &AutomationController::display_effective_value));
 151         }
 152 }
 153
 154 void
 155 AutomationController::value_changed ()
 156 {
 157         Gtkmm2ext::UI::instance()->call_slot (invalidator (*this), boost::bind (&AutomationController::display_effective_value, this));
 158 }
 159
 160 /** Stop updating our value from our controllable */
 161 void
 162 AutomationController::stop_updating ()
 163 {
 164         _screen_update_connection.disconnect ();
 165 }