libs/pbd/controllable.cc

   1 /*
   2     Copyright (C) 2000-2007 Paul Davis
   3
   4     This program is free software; you can redistribute it and/or modify
   5     it under the terms of the GNU General Public License as published by
   6     the Free Software Foundation; either version 2 of the License, or
   7     (at your option) any later version.
   8
   9     This program is distributed in the hope that it will be useful,
  10     but WITHOUT ANY WARRANTY; without even the implied warranty of
  11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12     GNU General Public License for more details.
  13
  14     You should have received a copy of the GNU General Public License
  15     along with this program; if not, write to the Free Software
  16     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  17
  18 */
  19
  20 #include "pbd/controllable.h"
  21 #include "pbd/enumwriter.h"
  22 #include "pbd/xml++.h"
  23 #include "pbd/error.h"
  24 #include "pbd/locale_guard.h"
  25
  26 #include "i18n.h"
  27
  28 using namespace PBD;
  29 using namespace std;
  30
  31 PBD::Signal1<void,Controllable*> Controllable::Destroyed;
  32 PBD::Signal1<bool,Controllable*> Controllable::StartLearning;
  33 PBD::Signal1<void,Controllable*> Controllable::StopLearning;
  34 PBD::Signal3<void,Controllable*,int,int> Controllable::CreateBinding;
  35 PBD::Signal1<void,Controllable*> Controllable::DeleteBinding;
  36
  37 Glib::StaticRWLock Controllable::registry_lock = GLIBMM_STATIC_RW_LOCK_INIT;
  38 Controllable::Controllables Controllable::registry;
  39 PBD::ScopedConnectionList registry_connections;
  40 const std::string Controllable::xml_node_name = X_("Controllable");
  41
  42 Controllable::Controllable (const string& name, Flag f)
  43         : _name (name)
  44         , _flags (f)
  45         , _touching (false)
  46 {
  47         add (*this);
  48 }
  49
  50 void
  51 Controllable::add (Controllable& ctl)
  52 {
  53         using namespace boost;
  54
  55         Glib::RWLock::WriterLock lm (registry_lock);
  56         registry.insert (&ctl);
  57
  58         /* Controllable::remove() is static - no need to manage this connection */
  59
  60         ctl.DropReferences.connect_same_thread (registry_connections, boost::bind (&Controllable::remove, &ctl));
  61 }
  62
  63 void
  64 Controllable::remove (Controllable* ctl)
  65 {
  66         Glib::RWLock::WriterLock lm (registry_lock);
  67
  68         for (Controllables::iterator i = registry.begin(); i != registry.end(); ++i) {
  69                 if ((*i) == ctl) {
  70                         registry.erase (i);
  71                         break;
  72                 }
  73         }
  74 }
  75
  76 Controllable*
  77 Controllable::by_id (const ID& id)
  78 {
  79         Glib::RWLock::ReaderLock lm (registry_lock);
  80
  81         for (Controllables::iterator i = registry.begin(); i != registry.end(); ++i) {
  82                 if ((*i)->id() == id) {
  83                         return (*i);
  84                 }
  85         }
  86         return 0;
  87 }
  88
  89 Controllable*
  90 Controllable::by_name (const string& str)
  91 {
  92         Glib::RWLock::ReaderLock lm (registry_lock);
  93
  94         for (Controllables::iterator i = registry.begin(); i != registry.end(); ++i) {
  95                 if ((*i)->_name == str) {
  96                         return (*i);
  97                 }
  98         }
  99         return 0;
 100 }
 101
 102 XMLNode&
 103 Controllable::get_state ()
 104 {
 105         XMLNode* node = new XMLNode (xml_node_name);
 106         LocaleGuard lg (X_("POSIX"));
 107         char buf[64];
 108
 109         node->add_property (X_("name"), _name); // not reloaded from XML state, just there to look at
 110         _id.print (buf, sizeof (buf));
 111         node->add_property (X_("id"), buf);
 112         node->add_property (X_("flags"), enum_2_string (_flags));
 113         snprintf (buf, sizeof (buf), "%2.12f", get_value());
 114         node->add_property (X_("value"), buf);
 115
 116         return *node;
 117 }
 118
 119
 120 int
 121 Controllable::set_state (const XMLNode& node, int /*version*/)
 122 {
 123         LocaleGuard lg (X_("POSIX"));
 124         const XMLProperty* prop;
 125
 126         if ((prop = node.property (X_("id"))) != 0) {
 127                 _id = prop->value();
 128         } else {
 129                 error << _("Controllable state node has no ID property") << endmsg;
 130                 return -1;
 131         }
 132
 133         if ((prop = node.property (X_("flags"))) != 0) {
 134                 _flags = (Flag) string_2_enum (prop->value(), _flags);
 135         }
 136
 137         if ((prop = node.property (X_("value"))) != 0) {
 138                 float val;
 139
 140                 if (sscanf (prop->value().c_str(), "%f", &val) == 1) {
 141                         set_value (val);
 142                 }
 143         }
 144
 145         return 0;
 146 }
 147
 148 void
 149 Controllable::set_flags (Flag f)
 150 {
 151         _flags = f;
 152 }