libs/pbd/controllable.cc

   1 #include <pbd/controllable.h>
   2 #include <pbd/xml++.h>
   3 #include <pbd/error.h>
   4
   5 #include "i18n.h"
   6
   7 using namespace PBD;
   8
   9 sigc::signal<void,Controllable*> Controllable::Destroyed;
  10 sigc::signal<bool,Controllable*> Controllable::StartLearning;
  11 sigc::signal<void,Controllable*> Controllable::StopLearning;
  12
  13 Glib::Mutex* Controllable::registry_lock = 0;
  14 Controllable::Controllables Controllable::registry;
  15
  16 Controllable::Controllable (std::string name)
  17         : _name (name)
  18 {
  19         if (registry_lock == 0) {
  20                 registry_lock = new Glib::Mutex;
  21         }
  22
  23         add ();
  24 }
  25
  26 void
  27 Controllable::add ()
  28 {
  29         Glib::Mutex::Lock lm (*registry_lock);
  30         registry.insert (this);
  31         this->GoingAway.connect (mem_fun (this, &Controllable::remove));
  32 }
  33
  34 void
  35 Controllable::remove ()
  36 {
  37         Glib::Mutex::Lock lm (*registry_lock);
  38         for (Controllables::iterator i = registry.begin(); i != registry.end(); ++i) {
  39                 if ((*i) == this) {
  40                         registry.erase (i);
  41                         break;
  42                 }
  43         }
  44 }
  45
  46 Controllable*
  47 Controllable::by_id (const ID& id)
  48 {
  49         Glib::Mutex::Lock lm (*registry_lock);
  50
  51         for (Controllables::iterator i = registry.begin(); i != registry.end(); ++i) {
  52                 if ((*i)->id() == id) {
  53                         return (*i);
  54                 }
  55         }
  56         return 0;
  57 }
  58
  59
  60 Controllable*
  61 Controllable::by_name (const std::string& str)
  62 {
  63         Glib::Mutex::Lock lm (*registry_lock);
  64
  65         for (Controllables::iterator i = registry.begin(); i != registry.end(); ++i) {
  66                 if ((*i)->_name == str) {
  67                         return (*i);
  68                 }
  69         }
  70         return 0;
  71 }
  72
  73 XMLNode&
  74 Controllable::get_state ()
  75 {
  76         XMLNode* node = new XMLNode (X_("controllable"));
  77         char buf[64];
  78
  79         node->add_property (X_("name"), _name); // not reloaded from XML state, just there to look at
  80         _id.print (buf, sizeof (buf));
  81         node->add_property (X_("id"), buf);
  82         return *node;
  83 }
  84
  85 int
  86 Controllable::set_state (const XMLNode& node)
  87 {
  88         const XMLProperty* prop = node.property (X_("id"));
  89
  90         if (prop) {
  91                 _id = prop->value();
  92                 return 0;
  93         } else {
  94                 error << _("Controllable state node has no ID property") << endmsg;
  95                 return -1;
  96         }
  97 }