From: Paul Davis <paul@linuxaudiosystems.com>
Date: Fri, 5 May 2017 11:31:21 +0000 (+0100)
Subject: libardour now has CoreSelection object to manage selection status of Stripables and... 
X-Git-Tag: 5.9~89
X-Git-Url: https://main.carlh.net/gitweb/?p=ardour.git;a=commitdiff_plain;h=0c035778e162bd5934fc0070e43a26ffb4c8825a

libardour now has CoreSelection object to manage selection status of Stripables and AutomationControls
---

diff --git a/libs/ardour/ardour/automatable.h b/libs/ardour/ardour/automatable.h
index ae2c8dd41f..cde527bed6 100644
--- a/libs/ardour/ardour/automatable.h
+++ b/libs/ardour/ardour/automatable.h
@@ -54,6 +54,7 @@ public:
 
 	boost::shared_ptr<Evoral::Control> control_factory(const Evoral::Parameter& id);
 
+	boost::shared_ptr<AutomationControl> automation_control (PBD::ID const & id) const;
 	boost::shared_ptr<AutomationControl> automation_control (const Evoral::Parameter& id) {
 		return automation_control (id, false);
 	}
diff --git a/libs/ardour/ardour/debug.h b/libs/ardour/ardour/debug.h
index eff8305bf1..61903cd724 100644
--- a/libs/ardour/ardour/debug.h
+++ b/libs/ardour/ardour/debug.h
@@ -72,6 +72,7 @@ namespace PBD {
 		LIBARDOUR_API extern DebugBits AudioEngine;
 		LIBARDOUR_API extern DebugBits Soundcloud;
 		LIBARDOUR_API extern DebugBits Butler;
+		LIBARDOUR_API extern DebugBits Selection;
 		LIBARDOUR_API extern DebugBits GenericMidi;
 		LIBARDOUR_API extern DebugBits BackendMIDI;
 		LIBARDOUR_API extern DebugBits BackendAudio;
diff --git a/libs/ardour/ardour/presentation_info.h b/libs/ardour/ardour/presentation_info.h
index 7c847e9fce..c508f8401a 100644
--- a/libs/ardour/ardour/presentation_info.h
+++ b/libs/ardour/ardour/presentation_info.h
@@ -93,11 +93,6 @@ class LIBARDOUR_API PresentationInfo : public PBD::Stateful
 	 * change after construction (not strictly the constructor itself, but
 	 * a more generalized notion of construction, as in "ready to use").
 	 *
-	 * SELECTION
-	 *
-	 * When an object is selected, its _flags member will have the Selected
-	 * bit set.
-	 *
 	 * VISIBILITY
 	 *
 	 * When an object is hidden, its _flags member will have the Hidden
@@ -119,13 +114,12 @@ class LIBARDOUR_API PresentationInfo : public PBD::Stateful
 		/* These are for sharing Stripable states between the GUI and other
 		 * user interfaces/control surfaces
 		 */
-		Selected = 0x100,
-		Hidden = 0x200,
+		Hidden = 0x100,
 		/* single bit indicates that the group order is set */
 		OrderSet = 0x400,
 
 		/* special mask to delect out "state" bits */
-		StatusMask = (Selected|Hidden),
+		StatusMask = (Hidden),
 		/* special mask to delect select type bits */
 		TypeMask = (AudioBus|AudioTrack|MidiTrack|MidiBus|VCA|MasterOut|MonitorOut|Auditioner)
 	};
@@ -152,7 +146,6 @@ class LIBARDOUR_API PresentationInfo : public PBD::Stateful
 	bool color_set() const;
 
 	void set_color (color_t);
-	void set_selected (bool yn);
 	void set_hidden (bool yn);
 	void set_flags (Flag f) { _flags = f; }
 
@@ -161,7 +154,6 @@ class LIBARDOUR_API PresentationInfo : public PBD::Stateful
 	int selection_cnt() const { return _selection_cnt; }
 
 	bool hidden() const { return _flags & Hidden; }
-	bool selected() const { return _flags & Selected; }
 	bool special() const { return _flags & (MasterOut|MonitorOut|Auditioner); }
 
 	bool flag_match (Flag f) const {
@@ -238,6 +230,7 @@ class LIBARDOUR_API PresentationInfo : public PBD::Stateful
 	 */
 
 	static PBD::Signal1<void,PBD::PropertyChange const &> Change;
+	static void send_static_change (const PBD::PropertyChange&);
 
 	static void make_property_quarks ();
 
@@ -270,7 +263,6 @@ class LIBARDOUR_API PresentationInfo : public PBD::Stateful
 	static PBD::PropertyChange _pending_static_changes;
 	static Glib::Threads::Mutex static_signal_lock;
 	static int _change_signal_suspended;
-	static void send_static_change (const PBD::PropertyChange&);
 
 	static int selection_counter;
 };
diff --git a/libs/ardour/ardour/route.h b/libs/ardour/ardour/route.h
index 9313df2f0c..794f87d607 100644
--- a/libs/ardour/ardour/route.h
+++ b/libs/ardour/ardour/route.h
@@ -28,7 +28,6 @@
 
 #include <boost/shared_ptr.hpp>
 #include <boost/weak_ptr.hpp>
-#include <boost/enable_shared_from_this.hpp>
 
 #include <glibmm/threads.h>
 #include "pbd/fastlog.h"
@@ -89,9 +88,7 @@ class LIBARDOUR_API Route : public Stripable,
                             public Soloable,
                             public Muteable,
                             public Monitorable,
-                            public Automatable,
-                            public RouteGroupMember,
-                            public boost::enable_shared_from_this<Route>
+                            public RouteGroupMember
 {
 public:
 
diff --git a/libs/ardour/ardour/session.h b/libs/ardour/ardour/session.h
index dfeb1d0834..f748adb15d 100644
--- a/libs/ardour/ardour/session.h
+++ b/libs/ardour/ardour/session.h
@@ -114,6 +114,7 @@ class Bundle;
 class Butler;
 class Click;
 class ControllableDescriptor;
+class CoreSelection;
 class Diskstream;
 class ExportHandler;
 class ExportStatus;
@@ -289,6 +290,8 @@ class LIBARDOUR_API Session : public PBD::StatefulDestructible, public PBD::Scop
 		return routes.reader ();
 	}
 
+	CoreSelection& selection () { return *_selection; }
+
 	/* because the set of Stripables consists of objects managed
 	 * independently, in multiple containers within the Session (or objects
 	 * owned by the session), we fill out a list in-place rather than
@@ -323,6 +326,7 @@ class LIBARDOUR_API Session : public PBD::StatefulDestructible, public PBD::Scop
 	bool io_name_is_legal (const std::string&) const;
 	boost::shared_ptr<Route> route_by_name (std::string) const;
 	boost::shared_ptr<Route> route_by_id (PBD::ID) const;
+	boost::shared_ptr<Stripable> stripable_by_id (PBD::ID) const;
 	boost::shared_ptr<Stripable> get_remote_nth_stripable (PresentationInfo::order_t n, PresentationInfo::Flag) const;
 	boost::shared_ptr<Route> get_remote_nth_route (PresentationInfo::order_t n) const;
 	boost::shared_ptr<Route> route_by_selected_count (uint32_t cnt) const;
@@ -1060,6 +1064,7 @@ class LIBARDOUR_API Session : public PBD::StatefulDestructible, public PBD::Scop
 	boost::shared_ptr<Processor> processor_by_id (PBD::ID) const;
 
 	boost::shared_ptr<PBD::Controllable> controllable_by_id (const PBD::ID&);
+	boost::shared_ptr<AutomationControl> automation_control_by_id (const PBD::ID&);
 	boost::shared_ptr<PBD::Controllable> controllable_by_descriptor (const ARDOUR::ControllableDescriptor&);
 
 	void add_controllable (boost::shared_ptr<PBD::Controllable>);
@@ -2088,6 +2093,8 @@ class LIBARDOUR_API Session : public PBD::StatefulDestructible, public PBD::Scop
 	void rewire_selected_midi (boost::shared_ptr<MidiTrack>);
 	void rewire_midi_selection_ports ();
 	boost::weak_ptr<MidiTrack> current_midi_target;
+
+	CoreSelection* _selection;
 };
 
 
diff --git a/libs/ardour/ardour/session_handle.h b/libs/ardour/ardour/session_handle.h
index 330f1805cd..804bf004c2 100644
--- a/libs/ardour/ardour/session_handle.h
+++ b/libs/ardour/ardour/session_handle.h
@@ -47,6 +47,7 @@ class LIBARDOUR_API SessionHandlePtr
 	virtual ~SessionHandlePtr () {}
 
 	virtual void set_session (ARDOUR::Session *);
+	virtual ARDOUR::Session* session() const { return _session; }
 
   protected:
 	ARDOUR::Session*          _session;
diff --git a/libs/ardour/ardour/stripable.h b/libs/ardour/ardour/stripable.h
index 2484c26345..7298a4807e 100644
--- a/libs/ardour/ardour/stripable.h
+++ b/libs/ardour/ardour/stripable.h
@@ -25,9 +25,11 @@
 #include <string>
 #include <boost/utility.hpp>
 #include <boost/shared_ptr.hpp>
+#include <boost/enable_shared_from_this.hpp>
 
 #include "pbd/signals.h"
 
+#include "ardour/automatable.h"
 #include "ardour/presentation_info.h"
 #include "ardour/session_object.h"
 #include "ardour/libardour_visibility.h"
@@ -56,10 +58,13 @@ class RecordSafeControl;
  * and behaviour of the object.
  */
 
-class LIBARDOUR_API Stripable : public SessionObject {
-   public:
+class LIBARDOUR_API Stripable : public SessionObject,
+                                public Automatable,
+                                public boost::enable_shared_from_this<Stripable>
+{
+  public:
 	Stripable (Session& session, std::string const & name, PresentationInfo const &);
-	virtual ~Stripable () {}
+	virtual ~Stripable ();
 
 	/* XXX
 	   midi on/off
@@ -72,7 +77,7 @@ class LIBARDOUR_API Stripable : public SessionObject {
 	int set_state (XMLNode const&, int);
 
 	bool is_hidden() const { return _presentation_info.flags() & PresentationInfo::Hidden; }
-	bool is_selected() const { return _presentation_info.flags() & PresentationInfo::Selected; }
+	bool is_selected() const;
 
 	PresentationInfo const & presentation_info () const { return _presentation_info; }
 	PresentationInfo& presentation_info () { return _presentation_info; }
diff --git a/libs/ardour/ardour/vca.h b/libs/ardour/ardour/vca.h
index 0977001927..5cf06e4d69 100644
--- a/libs/ardour/ardour/vca.h
+++ b/libs/ardour/ardour/vca.h
@@ -28,7 +28,6 @@
 #include "pbd/controllable.h"
 #include "pbd/statefuldestructible.h"
 
-#include "ardour/automatable.h"
 #include "ardour/muteable.h"
 #include "ardour/monitorable.h"
 #include "ardour/recordable.h"
@@ -47,10 +46,9 @@ class MonitorControl;
 class LIBARDOUR_API VCA : public Stripable,
                           public Soloable,
                           public Muteable,
-                          public Automatable,
                           public Recordable,
-                          public Monitorable,
-                          public boost::enable_shared_from_this<VCA> {
+                          public Monitorable
+{
   public:
 	VCA (Session& session,  int32_t num, const std::string& name);
 	~VCA();
diff --git a/libs/ardour/automatable.cc b/libs/ardour/automatable.cc
index 7ad930f60b..00dcdec8f0 100644
--- a/libs/ardour/automatable.cc
+++ b/libs/ardour/automatable.cc
@@ -508,6 +508,21 @@ Automatable::control_factory(const Evoral::Parameter& param)
 	return boost::shared_ptr<Evoral::Control>(control);
 }
 
+boost::shared_ptr<AutomationControl>
+Automatable::automation_control (PBD::ID const & id) const
+{
+	Controls::const_iterator li;
+
+	for (li = _controls.begin(); li != _controls.end(); ++li) {
+		boost::shared_ptr<AutomationControl> ac = boost::dynamic_pointer_cast<AutomationControl> (li->second);
+		if (ac && (ac->id() == id)) {
+			return ac;
+		}
+	}
+
+	return boost::shared_ptr<AutomationControl>();
+}
+
 boost::shared_ptr<AutomationControl>
 Automatable::automation_control (const Evoral::Parameter& id, bool create)
 {
diff --git a/libs/ardour/automation_control.cc b/libs/ardour/automation_control.cc
index 84c606cfd8..ffff120a23 100644
--- a/libs/ardour/automation_control.cc
+++ b/libs/ardour/automation_control.cc
@@ -30,6 +30,7 @@
 #include "ardour/control_group.h"
 #include "ardour/event_type_map.h"
 #include "ardour/session.h"
+#include "ardour/selection.h"
 
 #include "pbd/i18n.h"
 
@@ -68,6 +69,7 @@ AutomationControl::AutomationControl(ARDOUR::Session&                          s
 
 AutomationControl::~AutomationControl ()
 {
+	_session.selection().remove_control_by_id (id());
 	DropReferences (); /* EMIT SIGNAL */
 }
 
diff --git a/libs/ardour/debug.cc b/libs/ardour/debug.cc
index 5c645a8095..0f03475fe4 100644
--- a/libs/ardour/debug.cc
+++ b/libs/ardour/debug.cc
@@ -68,6 +68,7 @@ PBD::DebugBits PBD::DEBUG::Ports = PBD::new_debug_bit ("Ports");
 PBD::DebugBits PBD::DEBUG::AudioEngine = PBD::new_debug_bit ("AudioEngine");
 PBD::DebugBits PBD::DEBUG::Soundcloud = PBD::new_debug_bit ("Soundcloud");
 PBD::DebugBits PBD::DEBUG::Butler = PBD::new_debug_bit ("Butler");
+PBD::DebugBits PBD::DEBUG::Selection = PBD::new_debug_bit ("selection");
 PBD::DebugBits PBD::DEBUG::GenericMidi = PBD::new_debug_bit ("genericmidi");
 
 PBD::DebugBits PBD::DEBUG::BackendMIDI = PBD::new_debug_bit ("backendmidi");
diff --git a/libs/ardour/enums.cc b/libs/ardour/enums.cc
index 9e57f078d2..76d21021a1 100644
--- a/libs/ardour/enums.cc
+++ b/libs/ardour/enums.cc
@@ -722,7 +722,6 @@ setup_enum_writer ()
 	REGISTER_CLASS_ENUM (PresentationInfo, MasterOut);
 	REGISTER_CLASS_ENUM (PresentationInfo, MonitorOut);
 	REGISTER_CLASS_ENUM (PresentationInfo, Auditioner);
-	REGISTER_CLASS_ENUM (PresentationInfo, Selected);
 	REGISTER_CLASS_ENUM (PresentationInfo, Hidden);
 	REGISTER_CLASS_ENUM (PresentationInfo, OrderSet);
 	REGISTER_BITS (_PresentationInfo_Flag);
diff --git a/libs/ardour/luabindings.cc b/libs/ardour/luabindings.cc
index d8464c8b83..bd7f8ada13 100644
--- a/libs/ardour/luabindings.cc
+++ b/libs/ardour/luabindings.cc
@@ -1636,7 +1636,6 @@ LuaBindings::common (lua_State* L)
 		.addConst ("MasterOut", ARDOUR::PresentationInfo::Flag(PresentationInfo::MasterOut))
 		.addConst ("MonitorOut", ARDOUR::PresentationInfo::Flag(PresentationInfo::MonitorOut))
 		.addConst ("Auditioner", ARDOUR::PresentationInfo::Flag(PresentationInfo::Auditioner))
-		.addConst ("Selected", ARDOUR::PresentationInfo::Flag(PresentationInfo::Selected))
 		.addConst ("Hidden", ARDOUR::PresentationInfo::Flag(PresentationInfo::Hidden))
 		.addConst ("GroupOrderSet", ARDOUR::PresentationInfo::Flag(PresentationInfo::OrderSet))
 		.addConst ("StatusMask", ARDOUR::PresentationInfo::Flag(PresentationInfo::StatusMask))
diff --git a/libs/ardour/presentation_info.cc b/libs/ardour/presentation_info.cc
index f269541de0..d070f83220 100644
--- a/libs/ardour/presentation_info.cc
+++ b/libs/ardour/presentation_info.cc
@@ -30,6 +30,7 @@
 #include "pbd/xml++.h"
 
 #include "ardour/presentation_info.h"
+#include "ardour/selection.h"
 
 #include "pbd/i18n.h"
 
@@ -47,7 +48,7 @@ PBD::Signal1<void,PropertyChange const &> PresentationInfo::Change;
 Glib::Threads::Mutex PresentationInfo::static_signal_lock;
 int PresentationInfo::_change_signal_suspended = 0;
 PBD::PropertyChange PresentationInfo::_pending_static_changes;
-int PresentationInfo::selection_counter = 0;
+int PresentationInfo::selection_counter= 0;
 
 namespace ARDOUR {
 	namespace Properties {
@@ -240,22 +241,6 @@ PresentationInfo::color_set () const
 	return _color != 0;
 }
 
-void
-PresentationInfo::set_selected (bool yn)
-{
-	if (yn != selected()) {
-		if (yn) {
-			_flags = Flag (_flags | Selected);
-			_selection_cnt = g_atomic_int_add (&selection_counter, 1);
-		} else {
-			_flags = Flag (_flags & ~Selected);
-			_selection_cnt = 0;
-		}
-		send_change (PropertyChange (Properties::selected));
-		send_static_change (PropertyChange (Properties::selected));
-	}
-}
-
 void
 PresentationInfo::set_hidden (bool yn)
 {
diff --git a/libs/ardour/route.cc b/libs/ardour/route.cc
index ec54f83a9a..82ce635511 100644
--- a/libs/ardour/route.cc
+++ b/libs/ardour/route.cc
@@ -89,7 +89,6 @@ Route::Route (Session& sess, string name, PresentationInfo::Flag flag, DataType
 	: Stripable (sess, name, PresentationInfo (flag))
 	, GraphNode (sess._process_graph)
 	, Muteable (sess, name)
-	, Automatable (sess)
 	, _active (true)
 	, _signal_latency (0)
 	, _signal_latency_at_amp_position (0)
@@ -121,7 +120,7 @@ Route::Route (Session& sess, string name, PresentationInfo::Flag flag, DataType
 
 boost::weak_ptr<Route>
 Route::weakroute () {
-	return boost::weak_ptr<Route> (shared_from_this ());
+	return boost::weak_ptr<Route> (boost::dynamic_pointer_cast<Route> (shared_from_this ()));
 }
 
 int
@@ -970,7 +969,7 @@ Route::add_processors (const ProcessorList& others, boost::shared_ptr<Processor>
 		flags &= mask;
 
 		if (flags != None) {
-			boost::optional<int> rv = PluginSetup (shared_from_this (), pi, flags);  /* EMIT SIGNAL */
+			boost::optional<int> rv = PluginSetup (boost::dynamic_pointer_cast<Route>(shared_from_this ()), pi, flags);  /* EMIT SIGNAL */
 			int mode = rv.get_value_or (0);
 			switch (mode & 3) {
 				case 1:
@@ -3283,13 +3282,13 @@ Route::direct_feeds_according_to_reality (boost::shared_ptr<Route> other, bool*
 bool
 Route::direct_feeds_according_to_graph (boost::shared_ptr<Route> other, bool* via_send_only)
 {
-	return _session._current_route_graph.has (shared_from_this (), other, via_send_only);
+	return _session._current_route_graph.has (boost::dynamic_pointer_cast<Route> (shared_from_this ()), other, via_send_only);
 }
 
 bool
 Route::feeds_according_to_graph (boost::shared_ptr<Route> other)
 {
-	return _session._current_route_graph.feeds (shared_from_this (), other);
+	return _session._current_route_graph.feeds (boost::dynamic_pointer_cast<Route> (shared_from_this ()), other);
 }
 
 /** Called from the (non-realtime) butler thread when the transport is stopped */
@@ -3338,7 +3337,7 @@ Route::input_change_handler (IOChange change, void * /*src*/)
 					continue;
 				}
 				bool sends_only;
-				bool does_feed = (*i)->direct_feeds_according_to_reality (shared_from_this(), &sends_only);
+				bool does_feed = (*i)->direct_feeds_according_to_reality (boost::dynamic_pointer_cast<Route> (shared_from_this()), &sends_only);
 				if (does_feed && !sends_only) {
 					if ((*i)->soloed()) {
 						++sbou;
@@ -3452,7 +3451,7 @@ Route::output_change_handler (IOChange change, void * /*src*/)
 				_solo_control->mod_solo_by_others_downstream (delta);
 				// Session::route_solo_changed() does not propagate indirect solo-changes
 				// propagate upstream to tracks
-				boost::shared_ptr<Route> shared_this = shared_from_this();
+				boost::shared_ptr<Route> shared_this = boost::dynamic_pointer_cast<Route> (shared_from_this());
 				for (RouteList::iterator i = routes->begin(); i != routes->end(); ++i) {
 					if ((*i).get() == this || !can_solo()) {
 						continue;
diff --git a/libs/ardour/session.cc b/libs/ardour/session.cc
index 4ffb58566e..3cf24ba581 100644
--- a/libs/ardour/session.cc
+++ b/libs/ardour/session.cc
@@ -94,6 +94,7 @@
 #include "ardour/route_graph.h"
 #include "ardour/route_group.h"
 #include "ardour/send.h"
+#include "ardour/selection.h"
 #include "ardour/session.h"
 #include "ardour/session_directory.h"
 #include "ardour/session_playlists.h"
@@ -324,6 +325,7 @@ Session::Session (AudioEngine &eng,
 	, _midi_ports (0)
 	, _mmc (0)
 	, _vca_manager (new VCAManager (*this))
+	, _selection (new CoreSelection (*this))
 {
 	uint32_t sr = 0;
 
@@ -4388,6 +4390,22 @@ Session::route_by_id (PBD::ID id) const
 	return boost::shared_ptr<Route> ((Route*) 0);
 }
 
+
+boost::shared_ptr<Stripable>
+Session::stripable_by_id (PBD::ID id) const
+{
+	StripableList sl;
+	get_stripables (sl);
+
+	for (StripableList::const_iterator s = sl.begin(); s != sl.end(); ++s) {
+		if ((*s)->id() == id) {
+			return *s;
+		}
+	}
+
+	return boost::shared_ptr<Stripable>();
+}
+
 boost::shared_ptr<Processor>
 Session::processor_by_id (PBD::ID id) const
 {
@@ -4487,7 +4505,7 @@ Session::route_by_selected_count (uint32_t id) const
 	RouteList::iterator i;
 
 	for (i = r.begin(); i != r.end(); ++i) {
-		if ((*i)->presentation_info().selected()) {
+		if ((*i)->is_selected()) {
 			if (id == 0) {
 				return *i;
 			}
diff --git a/libs/ardour/session_midi.cc b/libs/ardour/session_midi.cc
index b0fb946011..081db24d2a 100644
--- a/libs/ardour/session_midi.cc
+++ b/libs/ardour/session_midi.cc
@@ -736,7 +736,7 @@ Session::midi_track_presentation_info_changed (PropertyChange const& what_change
 
 	boost::shared_ptr<MidiTrack> new_midi_target (mt.lock ());
 
-	if (new_midi_target->presentation_info().selected()) {
+	if (new_midi_target->is_selected()) {
 		rewire_selected_midi (new_midi_target);
 	}
 }
diff --git a/libs/ardour/session_state.cc b/libs/ardour/session_state.cc
index 581d6950c5..b7fac84ffe 100644
--- a/libs/ardour/session_state.cc
+++ b/libs/ardour/session_state.cc
@@ -114,6 +114,7 @@
 #include "ardour/revision.h"
 #include "ardour/route_group.h"
 #include "ardour/send.h"
+#include "ardour/selection.h"
 #include "ardour/session.h"
 #include "ardour/session_directory.h"
 #include "ardour/session_metadata.h"
@@ -1286,6 +1287,8 @@ Session::state (bool full_state)
 
 	if (full_state) {
 
+		node->add_child_nocopy (_selection->get_state());
+
 		if (_locations) {
 			node->add_child_nocopy (_locations->get_state());
 		}
@@ -1649,6 +1652,10 @@ Session::set_state (const XMLNode& node, int version)
 		}
 	}
 
+	if ((child = find_named_node (node, X_("Selection")))) {
+		_selection->set_state (*child, version);
+	}
+
 	update_route_record_state ();
 
 	/* here beginneth the second phase ... */
@@ -3583,6 +3590,12 @@ Session::controllable_by_id (const PBD::ID& id)
 	return boost::shared_ptr<Controllable>();
 }
 
+boost::shared_ptr<AutomationControl>
+Session::automation_control_by_id (const PBD::ID& id)
+{
+	return boost::dynamic_pointer_cast<AutomationControl> (controllable_by_id (id));
+}
+
 boost::shared_ptr<Controllable>
 Session::controllable_by_descriptor (const ControllableDescriptor& desc)
 {
diff --git a/libs/ardour/stripable.cc b/libs/ardour/stripable.cc
index c2f5b7239a..c4f128b4e8 100644
--- a/libs/ardour/stripable.cc
+++ b/libs/ardour/stripable.cc
@@ -21,24 +21,32 @@
 
 #include "pbd/compose.h"
 #include "pbd/convert.h"
+#include "pbd/i18n.h"
+
 
 #include "ardour/debug.h"
 #include "ardour/rc_configuration.h"
+#include "ardour/session.h"
+#include "ardour/selection.h"
 #include "ardour/stripable.h"
 
-#include "pbd/i18n.h"
-
 using namespace ARDOUR;
 using namespace PBD;
 using std::string;
 
 Stripable::Stripable (Session& s, string const & name, PresentationInfo const & pi)
 	: SessionObject (s, name)
+	, Automatable (s)
 	, _presentation_info (pi)
 	, _active_color_picker (0)
 {
 }
 
+Stripable::~Stripable ()
+{
+	_session.selection().remove_stripable_by_id (id());
+}
+
 void
 Stripable::set_presentation_order (PresentationInfo::order_t order)
 {
@@ -103,3 +111,15 @@ Stripable::set_state (XMLNode const& node, int version)
 
 	return 0;
 }
+
+bool
+Stripable::is_selected() const
+{
+	try {
+		boost::shared_ptr<const Stripable> s (shared_from_this());
+	} catch (...) {
+		std::cerr << "cannot shared-from-this for " << this << std::endl;
+		abort ();
+	}
+	return _session.selection().selected (shared_from_this());
+}
diff --git a/libs/ardour/track.cc b/libs/ardour/track.cc
index 1d17d9238c..d7d9a0a9d1 100644
--- a/libs/ardour/track.cc
+++ b/libs/ardour/track.cc
@@ -65,7 +65,7 @@ Track::init ()
                 return -1;
         }
 
-	boost::shared_ptr<Route> rp (shared_from_this());
+        boost::shared_ptr<Route> rp (boost::dynamic_pointer_cast<Route> (shared_from_this()));
 	boost::shared_ptr<Track> rt = boost::dynamic_pointer_cast<Track> (rp);
 
 	_record_enable_control.reset (new RecordEnableControl (_session, EventTypeMap::instance().to_symbol (RecEnableAutomation), *this));
diff --git a/libs/ardour/vca.cc b/libs/ardour/vca.cc
index d056c855ed..3eff1a6b45 100644
--- a/libs/ardour/vca.cc
+++ b/libs/ardour/vca.cc
@@ -70,7 +70,6 @@ VCA::get_next_vca_number ()
 VCA::VCA (Session& s, int32_t num, const string& name)
 	: Stripable (s, name, PresentationInfo (num, PresentationInfo::VCA))
 	, Muteable (s, name)
-	, Automatable (s)
 	, _number (num)
 	, _gain_control (new GainControl (s, Evoral::Parameter (GainAutomation), boost::shared_ptr<AutomationList> ()))
 {
diff --git a/libs/ardour/wscript b/libs/ardour/wscript
index 1098477426..7148a26042 100644
--- a/libs/ardour/wscript
+++ b/libs/ardour/wscript
@@ -194,6 +194,7 @@ libardour_sources = [
         'rb_effect.cc',
         'scene_change.cc',
         'search_paths.cc',
+        'selection.cc',
         'send.cc',
         'session.cc',
         'session_butler.cc',
diff --git a/libs/surfaces/mackie/mackie_control_protocol.cc b/libs/surfaces/mackie/mackie_control_protocol.cc
index 62d0abab09..a359982799 100644
--- a/libs/surfaces/mackie/mackie_control_protocol.cc
+++ b/libs/surfaces/mackie/mackie_control_protocol.cc
@@ -335,7 +335,7 @@ MackieControlProtocol::get_sorted_stripables()
 			}
 			break;
 		case Selected: // For example: a group (this is USER)
-			if (s->presentation_info().selected() && !s->presentation_info().hidden()) {
+			if (s->is_selected() && !s->presentation_info().hidden()) {
 				sorted.push_back (s);
 			}
 			break;
@@ -2038,7 +2038,7 @@ MackieControlProtocol::select_range (uint32_t pressed)
 		return;
 	}
 
-	if (stripables.size() == 1 && ControlProtocol::last_selected().size() == 1 && stripables.front()->presentation_info().selected()) {
+	if (stripables.size() == 1 && ControlProtocol::last_selected().size() == 1 && stripables.front()->is_selected()) {
 		/* cancel selection for one and only selected stripable */
 		ToggleStripableSelection (stripables.front());
 	} else {
diff --git a/libs/surfaces/mackie/strip.cc b/libs/surfaces/mackie/strip.cc
index e396af575c..9a570f8227 100644
--- a/libs/surfaces/mackie/strip.cc
+++ b/libs/surfaces/mackie/strip.cc
@@ -380,8 +380,8 @@ Strip::notify_property_changed (const PropertyChange& what_changed)
 
 	if (what_changed.contains (ARDOUR::Properties::selected)) {
 		if (_stripable) {
-			_surface->write (_select->set_state (_stripable->presentation_info().selected()));
-			_surface->mcp().update_selected (_stripable, _stripable->presentation_info().selected());
+			_surface->write (_select->set_state (_stripable->is_selected()));
+			_surface->mcp().update_selected (_stripable, _stripable->is_selected());
 		}
 	}
 }
diff --git a/libs/surfaces/osc/osc.cc b/libs/surfaces/osc/osc.cc
index 5fe8e25f41..fae9db11e1 100644
--- a/libs/surfaces/osc/osc.cc
+++ b/libs/surfaces/osc/osc.cc
@@ -3998,17 +3998,13 @@ OSC::get_sorted_stripables(std::bitset<32> types, bool cue)
 						sorted.push_back (s);
 					}
 				}
-			} else
-			if (types[3] && (s->presentation_info().flags() & PresentationInfo::MidiBus)) {
+			} else if (types[3] && (s->presentation_info().flags() & PresentationInfo::MidiBus)) {
 				sorted.push_back (s);
-			} else
-			if (types[4] && (s->presentation_info().flags() & PresentationInfo::VCA)) {
+			} else if (types[4] && (s->presentation_info().flags() & PresentationInfo::VCA)) {
 				sorted.push_back (s);
-			} else
-			if (types[8] && (s->presentation_info().flags() & PresentationInfo::Selected)) {
+			} else if (types[8] && (s->is_selected())) {
 				sorted.push_back (s);
-			} else
-			if (types[9] && (s->presentation_info().flags() & PresentationInfo::Hidden)) {
+			} else if (types[9] && (s->presentation_info().flags() & PresentationInfo::Hidden)) {
 				sorted.push_back (s);
 			}
 		}
diff --git a/libs/surfaces/push2/mix.cc b/libs/surfaces/push2/mix.cc
index 75b17f8c20..4582cd0d30 100644
--- a/libs/surfaces/push2/mix.cc
+++ b/libs/surfaces/push2/mix.cc
@@ -448,7 +448,7 @@ MixLayout::stripable_property_change (PropertyChange const& what_changed, uint32
 	if (what_changed.contains (Properties::color)) {
 		lower_backgrounds[which]->set_fill_color (stripable[which]->presentation_info().color());
 
-		if (stripable[which]->presentation_info().selected()) {
+		if (stripable[which]->is_selected()) {
 			lower_text[which]->set_fill_color (contrasting_text_color (stripable[which]->presentation_info().color()));
 			/* might not be a MIDI track, in which case this will
 			   do nothing
@@ -467,7 +467,7 @@ MixLayout::stripable_property_change (PropertyChange const& what_changed, uint32
 			return;
 		}
 
-		if (stripable[which]->presentation_info().selected()) {
+		if (stripable[which]->is_selected()) {
 			show_selection (which);
 		} else {
 			hide_selection (which);
@@ -581,7 +581,7 @@ MixLayout::switch_bank (uint32_t base)
 			stripable[n]->solo_control()->Changed.connect (stripable_connections, invalidator (*this), boost::bind (&MixLayout::solo_changed, this, n), &p2);
 			stripable[n]->mute_control()->Changed.connect (stripable_connections, invalidator (*this), boost::bind (&MixLayout::mute_changed, this, n), &p2);
 
-			if (stripable[n]->presentation_info().selected()) {
+			if (stripable[n]->is_selected()) {
 				show_selection (n);
 			} else {
 				hide_selection (n);
@@ -671,7 +671,7 @@ MixLayout::button_select_release ()
 
 	for (int n = 0; n < 8; ++n) {
 		if (stripable[n]) {
-			if (stripable[n]->presentation_info().selected()) {
+			if (stripable[n]->is_selected()) {
 					selected = n;
 					break;
 			}