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
  25 #include "i18n.h"
  26
  27 using namespace PBD;
  28 using namespace std;
  29
  30 PBD::Signal1<void,Controllable*> Controllable::Destroyed;
  31 PBD::Signal1<bool,Controllable*> Controllable::StartLearning;
  32 PBD::Signal1<void,Controllable*> Controllable::StopLearning;
  33 PBD::Signal3<void,Controllable*,int,int> Controllable::CreateBinding;
  34 PBD::Signal1<void,Controllable*> Controllable::DeleteBinding;
  35
  36 Glib::StaticRWLock Controllable::registry_lock = GLIBMM_STATIC_RW_LOCK_INIT;
  37 Controllable::Controllables Controllable::registry;
  38 PBD::ScopedConnectionList registry_connections;
  39
  40 Controllable::Controllable (const string& name, Flag f)
  41         : _name (name)
  42         , _flags (f)
  43         , _touching (false)
  44 {
  45         add (*this);
  46 }
  47
  48 void
  49 Controllable::add (Controllable& ctl)
  50 {
  51         using namespace boost;
  52
  53         Glib::RWLock::WriterLock lm (registry_lock);
  54         registry.insert (&ctl);
  55
  56         /* Controllable::remove() is static - no need to manage this connection */
  57
  58         ctl.DropReferences.connect_same_thread (registry_connections, boost::bind (&Controllable::remove, &ctl));
  59 }
  60
  61 void
  62 Controllable::remove (Controllable* ctl)
  63 {
  64         Glib::RWLock::WriterLock lm (registry_lock);
  65
  66         for (Controllables::iterator i = registry.begin(); i != registry.end(); ++i) {
  67                 if ((*i) == ctl) {
  68                         registry.erase (i);
  69                         break;
  70                 }
  71         }
  72 }
  73
  74 Controllable*
  75 Controllable::by_id (const ID& id)
  76 {
  77         Glib::RWLock::ReaderLock lm (registry_lock);
  78
  79         for (Controllables::iterator i = registry.begin(); i != registry.end(); ++i) {
  80                 if ((*i)->id() == id) {
  81                         return (*i);
  82                 }
  83         }
  84         return 0;
  85 }
  86
  87 Controllable*
  88 Controllable::by_name (const string& str)
  89 {
  90         Glib::RWLock::ReaderLock lm (registry_lock);
  91
  92         for (Controllables::iterator i = registry.begin(); i != registry.end(); ++i) {
  93                 if ((*i)->_name == str) {
  94                         return (*i);
  95                 }
  96         }
  97         return 0;
  98 }
  99
 100 XMLNode&
 101 Controllable::get_state ()
 102 {
 103         XMLNode* node = new XMLNode (X_("Controllable"));
 104         char buf[64];
 105
 106         node->add_property (X_("name"), _name); // not reloaded from XML state, just there to look at
 107         _id.print (buf, sizeof (buf));
 108         node->add_property (X_("id"), buf);
 109         node->add_property (X_("flags"), enum_2_string (_flags));
 110
 111         return *node;
 112 }
 113
 114 int
 115 Controllable::set_state (const XMLNode& node, int /*version*/)
 116 {
 117         const XMLProperty* prop;
 118
 119         if ((prop = node.property (X_("id"))) != 0) {
 120                 _id = prop->value();
 121                 return 0;
 122         } else {
 123                 error << _("Controllable state node has no ID property") << endmsg;
 124                 return -1;
 125         }
 126
 127         if ((prop = node.property (X_("flags"))) != 0) {
 128                 _flags = (Flag) string_2_enum (prop->value(), _flags);
 129         }
 130 }
 131
 132 void
 133 Controllable::set_flags (Flag f)
 134 {
 135         _flags = f;
 136 }