retain controllable info for plugins

git-svn-id: svn://localhost/ardour2/branches/2.0-ongoing@2488 d708f5d6-7413-0410-9779-e7cbd77b26cf

2 files changed, 26 insertions, 0 deletions

diff --git a/libs/pbd/controllable.cc b/libs/pbd/controllable.cc
index 039eb43e3a..bf0f7f5c6d 100644
--- a/libs/pbd/controllable.cc
+++ b/libs/pbd/controllable.cc
@@ -42,6 +42,31 @@ Controllable::Controllable (std::string name)
 	add ();
 }
 
+Controllable::Controllable (const XMLNode& node)
+{
+	const XMLProperty* prop = node.property (X_("name"));
+
+	if (!prop) {
+		fatal << string_compose (_("programming error: %1"), "Controllable (XMLNode&) constructor called without name property")
+		      << endmsg;
+		/*NOTREACHED*/
+	}
+
+	_name = prop->value ();
+
+	prop = node.property (X_("id"));
+
+	if (!prop) {
+		fatal << string_compose (_("programming error: %1"), "Controllable (XMLNode&) constructor called without id property")
+		      << endmsg;
+		/*NOTREACHED*/
+	}
+	
+	_id = prop->value();
+	
+	add ();
+}
+
 void
 Controllable::add ()
 {
diff --git a/libs/pbd/pbd/controllable.h b/libs/pbd/pbd/controllable.h
index ed41af1be8..85f09726ca 100644
--- a/libs/pbd/pbd/controllable.h
+++ b/libs/pbd/pbd/controllable.h
@@ -35,6 +35,7 @@ namespace PBD {
 class Controllable : public PBD::StatefulDestructible {
   public:
 	Controllable (std::string name);
+	Controllable (const XMLNode&);
 	virtual ~Controllable() { Destroyed (this); }
 
 	virtual void set_value (float) = 0;