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> printer, boost::shared_ptr<AutomationControl> ac, Adjustment* adj)
  45         : BarController (*adj, ac)
  46         , _ignore_change(false)
  47         , _printer (printer)
  48         , _controllable(ac)
  49         , _adjustment(adj)
  50 {
  51         assert (_printer);
  52
  53         set_name (X_("PluginSlider")); // FIXME: get yer own name!
  54         set_style (BarController::LeftToRight);
  55         set_use_parent (true);
  56
  57         StartGesture.connect (sigc::mem_fun(*this, &AutomationController::start_touch));
  58         StopGesture.connect (sigc::mem_fun(*this, &AutomationController::end_touch));
  59
  60         _adjustment->signal_value_changed().connect (
  61                         sigc::mem_fun(*this, &AutomationController::value_adjusted));
  62
  63         _screen_update_connection = ARDOUR_UI::RapidScreenUpdate.connect (
  64                         sigc::mem_fun (*this, &AutomationController::display_effective_value));
  65
  66         ac->Changed.connect (_changed_connection, invalidator (*this), boost::bind (&AutomationController::value_changed, this), gui_context());
  67 }
  68
  69 AutomationController::~AutomationController()
  70 {
  71 }
  72
  73 boost::shared_ptr<AutomationController>
  74 AutomationController::create(
  75                 boost::shared_ptr<Automatable> printer,
  76                 const Evoral::Parameter& param,
  77                 boost::shared_ptr<AutomationControl> ac)
  78 {
  79         Gtk::Adjustment* adjustment = manage (new Gtk::Adjustment (param.normal(), param.min(), param.max()));
  80         assert (ac);
  81         assert(ac->parameter() == param);
  82         return boost::shared_ptr<AutomationController>(new AutomationController(printer, ac, adjustment));
  83 }
  84
  85 std::string
  86 AutomationController::get_label (double& xpos)
  87 {
  88         xpos = 0.5;
  89         return _printer->value_as_string (_controllable);
  90 }
  91
  92 void
  93 AutomationController::display_effective_value()
  94 {
  95         double const ui_value = _controllable->user_to_ui (_controllable->get_value());
  96
  97         if (_adjustment->get_value() != ui_value) {
  98                 _ignore_change = true;
  99                 _adjustment->set_value (ui_value);
 100                 _ignore_change = false;
 101         }
 102 }
 103
 104 void
 105 AutomationController::value_adjusted ()
 106 {
 107         if (!_ignore_change) {
 108                 _controllable->set_value (_controllable->ui_to_user (_adjustment->get_value()));
 109         }
 110 }
 111
 112 void
 113 AutomationController::start_touch()
 114 {
 115         _controllable->start_touch (_controllable->session().transport_frame());
 116 }
 117
 118 void
 119 AutomationController::end_touch ()
 120 {
 121         if (_controllable->automation_state() == Touch) {
 122
 123                 bool mark = false;
 124                 double when = 0;
 125
 126                 if (_controllable->session().transport_rolling()) {
 127                         mark = true;
 128                         when = _controllable->session().transport_frame();
 129                 }
 130
 131                 _controllable->stop_touch (mark, when);
 132         }
 133 }
 134
 135 void
 136 AutomationController::automation_state_changed ()
 137 {
 138         ENSURE_GUI_THREAD (*this, &AutomationController::automation_state_changed)
 139
 140         bool x = (_controllable->automation_state() != Off);
 141
 142         /* start watching automation so that things move */
 143
 144         _screen_update_connection.disconnect();
 145
 146         if (x) {
 147                 _screen_update_connection = ARDOUR_UI::RapidScreenUpdate.connect (
 148                                 sigc::mem_fun (*this, &AutomationController::display_effective_value));
 149         }
 150 }
 151
 152 void
 153 AutomationController::value_changed ()
 154 {
 155         Gtkmm2ext::UI::instance()->call_slot (invalidator (*this), boost::bind (&AutomationController::display_effective_value, this));
 156 }
 157
 158 /** Stop updating our value from our controllable */
 159 void
 160 AutomationController::stop_updating ()
 161 {
 162         _screen_update_connection.disconnect ();
 163 }