X-Git-Url: https://main.carlh.net/gitweb/?a=blobdiff_plain;f=libs%2Fpbd%2Fpbd%2Fcontrollable.h;h=eb4b7ff14291c00df03b9b1c7b42720d28371a55;hb=130df9c2b195e82ba223ef8541802d775e947610;hp=ed41af1be85fa8b2691511092c1e25f2bdf68136;hpb=2e8f80e37a7d20deb3f138cd72c26f8c6de9d1ab;p=ardour.git

diff --git a/libs/pbd/pbd/controllable.h b/libs/pbd/pbd/controllable.h
index ed41af1be8..eb4b7ff142 100644
--- a/libs/pbd/pbd/controllable.h
+++ b/libs/pbd/pbd/controllable.h
@@ -22,54 +22,108 @@
 
 #include <string>
 #include <set>
+#include <map>
 
-#include <sigc++/trackable.h>
-#include <sigc++/signal.h>
+#include "pbd/libpbd_visibility.h"
+#include "pbd/signals.h"
+#include <glibmm/threads.h>
 
-#include <pbd/statefuldestructible.h>
+#include "pbd/statefuldestructible.h"
 
 class XMLNode;
 
 namespace PBD {
 
-class Controllable : public PBD::StatefulDestructible {
+class LIBPBD_API Controllable : public PBD::StatefulDestructible {
   public:
-	Controllable (std::string name);
-	virtual ~Controllable() { Destroyed (this); }
-
-	virtual void set_value (float) = 0;
-	virtual float get_value (void) const = 0;
+	enum Flag {
+		Toggle = 0x1,
+		GainLike = 0x2,
+	};
 
-	virtual bool can_send_feedback() const { return true; }
+	Controllable (const std::string& name, Flag f = Flag (0));
+	virtual ~Controllable() { Destroyed (this); }
 
-	sigc::signal<void> LearningFinished;
+	/* We express Controllable values in one of three ways:
+	 * 1. `user' --- as presented to the user (e.g. dB, Hz, etc.)
+	 * 2. `interface' --- as used in some cases for the UI representation
+	 * (in order to make controls behave logarithmically).
+	 * 3. `internal' --- as passed to a processor, track, plugin, or whatever.
+	 *
+	 * Note that in some cases user and processor may be the same
+	 * (and interface different) e.g. frequency, which is presented
+	 * to the user and passed to the processor in linear terms, but
+	 * which needs log scaling in the interface.
+	 *
+	 * In other cases, user and interface may be the same (and processor different)
+	 * e.g. gain, which is presented to the user in log terms (dB)
+	 * but passed to the processor as a linear quantity.
+	 */
+
+	/** Set `internal' value */
+	virtual void set_value (double) = 0;
+	/** @return `internal' value */
+	virtual double get_value (void) const = 0;
+
+	PBD::Signal0<void> LearningFinished;
+	static PBD::Signal3<void,PBD::Controllable*,int,int> CreateBinding;
+	static PBD::Signal1<void,PBD::Controllable*> DeleteBinding;
+
+	static PBD::Signal1<bool,PBD::Controllable*> StartLearning;
+	static PBD::Signal1<void,PBD::Controllable*> StopLearning;
+
+	static PBD::Signal1<void,Controllable*> Destroyed;
+	
+	PBD::Signal0<void> Changed;
+
+	int set_state (const XMLNode&, int version);
+	XMLNode& get_state ();
 
-	static sigc::signal<bool,PBD::Controllable*> StartLearning;
-	static sigc::signal<void,PBD::Controllable*> StopLearning;
+	std::string name()      const { return _name; }
 
-	static sigc::signal<void,Controllable*> Destroyed;
+	bool touching () const { return _touching; }
+	void set_touching (bool yn) { _touching = yn; }
 
-	sigc::signal<void> Changed;
+	bool is_toggle() const { return _flags & Toggle; }
+	bool is_gain_like() const { return _flags & GainLike; }
 
-	int set_state (const XMLNode&);
-	XMLNode& get_state ();
+        virtual double lower() const { return 0.0; }
+        virtual double upper() const { return 1.0; }
 
-	std::string name() const { return _name; }
+	Flag flags() const { return _flags; }
+	void set_flags (Flag f);
 
 	static Controllable* by_id (const PBD::ID&);
 	static Controllable* by_name (const std::string&);
-
+        static const std::string xml_node_name;
   private:
 	std::string _name;
 
-	void add ();
-	void remove ();
+	Flag        _flags;
+	bool        _touching;
+
+	static void add (Controllable&);
+	static void remove (Controllable*);
 
 	typedef std::set<PBD::Controllable*> Controllables;
-	static Glib::Mutex* registry_lock;
+        static Glib::Threads::RWLock registry_lock;
 	static Controllables registry;
 };
 
+/* a utility class for the occasions when you need but do not have
+   a Controllable
+*/
+
+class LIBPBD_API IgnorableControllable : public Controllable 
+{
+  public: 
+	IgnorableControllable () : PBD::Controllable ("ignoreMe") {}
+	~IgnorableControllable () {}
+    
+	void set_value (double /*v*/) {}
+	double get_value () const { return 0.0; }
+};
+
 }
 
 #endif /* __pbd_controllable_h__ */