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[ardour.git] / gtk2_ardour / lv2_plugin_ui.cc
index 25805cbaccce07edb4539a9e9a120095e3fad41b..f83adef40704e436344e1414ae63257f34f878eb 100644 (file)
@@ -1,5 +1,5 @@
 /*
-    Copyright (C) 2008-2011 Paul Davis
+    Copyright (C) 2008-2012 Paul Davis
     Author: David Robillard
 
     This program is free software; you can redistribute it and/or modify
     You should have received a copy of the GNU General Public License
     along with this program; if not, write to the Free Software
     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
-
 */
 
+#include <gtkmm/stock.h>
+
 #include "ardour/lv2_plugin.h"
-#include "ardour/plugin_manager.h"
-#include "ardour/processor.h"
+#include "ardour/session.h"
+#include "pbd/error.h"
+#include "pbd/stacktrace.h"
 
-#include "ardour_ui.h"
 #include "gui_thread.h"
 #include "lv2_plugin_ui.h"
+#include "timers.h"
 
-#include "lv2_ui.h"
+#include "gtkmm2ext/utils.h"
+
+#include "lv2/lv2plug.in/ns/extensions/ui/ui.h"
+
+#include <lilv/lilv.h>
+#include <suil/suil.h>
+
+#include "pbd/i18n.h"
 
-using namespace Gtk;
 using namespace ARDOUR;
+using namespace Gtk;
 using namespace PBD;
 
-#if defined(HAVE_NEW_SLV2) && defined(HAVE_SUIL)
-SuilHost  LV2PluginUI::ui_host  = NULL;
-SLV2Value LV2PluginUI::ui_GtkUI = NULL;
-#endif
+#define NS_UI "http://lv2plug.in/ns/extensions/ui#"
+
+static SuilHost* ui_host = NULL;
 
 void
-LV2PluginUI::lv2_ui_write(void*       controller,
-                          uint32_t    port_index,
-                          uint32_t    /*buffer_size*/,
-                          uint32_t    /*format*/,
-                          const void* buffer)
+LV2PluginUI::write_from_ui(void*       controller,
+                           uint32_t    port_index,
+                           uint32_t    buffer_size,
+                           uint32_t    format,
+                           const void* buffer)
 {
        LV2PluginUI* me = (LV2PluginUI*)controller;
-       boost::shared_ptr<AutomationControl> ac = me->_controllables[port_index];
+       if (format == 0) {
+               if (port_index >= me->_controllables.size()) {
+                       return;
+               }
+
+               boost::shared_ptr<AutomationControl> ac = me->_controllables[port_index];
 
-       if (ac) {
-               ac->set_value(*(float*)buffer);
+               me->_updates.insert (port_index);
+
+               if (ac) {
+                       ac->set_value(*(const float*)buffer, Controllable::NoGroup);
+               }
+       } else if (format == URIMap::instance().urids.atom_eventTransfer) {
+
+               const int cnt = me->_pi->get_count();
+               for (int i=0; i < cnt; i++ ) {
+                       boost::shared_ptr<LV2Plugin> lv2i = boost::dynamic_pointer_cast<LV2Plugin> (me->_pi->plugin(i));
+                       lv2i->write_from_ui(port_index, format, buffer_size, (const uint8_t*)buffer);
+               }
        }
 }
 
 void
-LV2PluginUI::on_external_ui_closed(void* controller)
+LV2PluginUI::write_to_ui(void*       controller,
+                         uint32_t    port_index,
+                         uint32_t    buffer_size,
+                         uint32_t    format,
+                         const void* buffer)
 {
        LV2PluginUI* me = (LV2PluginUI*)controller;
-       me->_screen_update_connection.disconnect();
-       me->_external_ui_ptr = NULL;
+       if (me->_inst) {
+               suil_instance_port_event((SuilInstance*)me->_inst,
+                                        port_index, buffer_size, format, buffer);
+       }
+}
+
+uint32_t
+LV2PluginUI::port_index(void* controller, const char* symbol)
+{
+       return ((LV2PluginUI*)controller)->_lv2->port_index(symbol);
 }
 
 void
-LV2PluginUI::parameter_changed(uint32_t port_index, float val)
+LV2PluginUI::touch(void*    controller,
+                   uint32_t port_index,
+                   bool     grabbed)
 {
-       PlugUIBase::parameter_changed(port_index, val);
+       LV2PluginUI* me = (LV2PluginUI*)controller;
+       if (port_index >= me->_controllables.size()) {
+               return;
+       }
+       if (!me->_lv2->parameter_is_control(port_index) || !me->_lv2->parameter_is_input(port_index)) {
+               return;
+       }
 
-       if (val != _values[port_index]) {
-               parameter_update(port_index, val);
+       ControllableRef control = me->_controllables[port_index];
+       if (grabbed) {
+               control->start_touch(control->session().transport_sample());
+       } else {
+               control->stop_touch(control->session().transport_sample());
        }
 }
 
 void
-LV2PluginUI::parameter_update(uint32_t port_index, float val)
+LV2PluginUI::set_path_property (int response,
+                                const ParameterDescriptor& desc,
+                                Gtk::FileChooserDialog*    widget)
 {
-       if (!_inst) {
-               return;
+       if (response == Gtk::RESPONSE_ACCEPT) {
+               plugin->set_property (desc.key, Variant (Variant::PATH, widget->get_filename()));
+       }
+#if 0
+       widget->hide ();
+       delete_when_idle (widget);
+#else
+       delete widget;
+#endif
+       active_parameter_requests.erase (desc.key);
+}
+
+uint32_t
+LV2PluginUI::request_parameter (void* handle, LV2_URID key)
+{
+       LV2PluginUI* me = (LV2PluginUI*)handle;
+
+       /* This will return `PropertyDescriptors nothing` when not found */
+       const ParameterDescriptor& desc (me->_lv2->get_property_descriptor(key));
+       if (desc.datatype != Variant::PATH) {
+               return 0;
        }
 
-#ifdef HAVE_SUIL
-       suil_instance_port_event(_inst, port_index, 4, 0, &val);
+#if 0 // MODAL, blocking
+
+       Gtk::FileChooserDialog* lv2ui_file_dialog (desc.label, FILE_CHOOSER_ACTION_OPEN);
+       Gtkmm2ext::add_volume_shortcuts (lv2ui_file_dialog);
+       lv2ui_file_dialog.add_button (Gtk::Stock::CANCEL, Gtk::RESPONSE_CANCEL);
+       lv2ui_file_dialog.add_button (Gtk::Stock::OPEN, Gtk::RESPONSE_ACCEPT);
+       lv2ui_file_dialog.set_default_response(Gtk::RESPONSE_ACCEPT);
+       if (_file_dialog.run()= Gtk::RESPONSE_ACCEPT) {
+               me->plugin->set_property (desc.key, Variant(Variant::PATH, lv2ui_file_dialog.get_filename()));
+       }
+       return 0;
+
 #else
-       const LV2UI_Descriptor* ui_desc   = slv2_ui_instance_get_descriptor(_inst);
-       LV2UI_Handle            ui_handle = slv2_ui_instance_get_handle(_inst);
-       if (ui_desc->port_event) {
-               ui_desc->port_event(ui_handle, port_index, 4, 0, &val);
+
+       if (me->active_parameter_requests.find (key) != me->active_parameter_requests.end()) {
+               return 0; /* already showing dialog */
        }
+       me->active_parameter_requests.insert (key);
+
+       Gtk::FileChooserDialog* lv2ui_file_dialog = new Gtk::FileChooserDialog(desc.label, FILE_CHOOSER_ACTION_OPEN);
+       Gtkmm2ext::add_volume_shortcuts (*lv2ui_file_dialog);
+       lv2ui_file_dialog->add_button (Gtk::Stock::CANCEL, Gtk::RESPONSE_CANCEL);
+       lv2ui_file_dialog->add_button (Gtk::Stock::OPEN, Gtk::RESPONSE_ACCEPT);
+       lv2ui_file_dialog->set_default_response(Gtk::RESPONSE_ACCEPT);
+
+       /* this assumes  announce_property_values() was called, or
+        * the plugin has previously sent a patch:Set */
+       const Variant& value = me->_lv2->get_property_value (desc.key);
+       if (value.type() == Variant::PATH) {
+               lv2ui_file_dialog->set_filename (value.get_path());
+       }
+
+#if 0 // TODO mime-type, file-extension filter, get from LV2 Parameter Property
+       FileFilter file_ext_filter;
+       file_ext_filter.add_pattern ("*.foo");
+       file_ext_filter.set_name ("Foo File");
+       lv2ui_file_dialog.add_filter (file_ext_filter);
 #endif
-       _values[port_index] = val;
+
+       lv2ui_file_dialog->signal_response().connect (sigc::bind (sigc::mem_fun (*me, &LV2PluginUI::set_path_property), desc, lv2ui_file_dialog));
+       lv2ui_file_dialog->present();
+       return 0;
+
+#endif
+}
+
+void
+LV2PluginUI::update_timeout()
+{
+       _lv2->emit_to_ui(this, &LV2PluginUI::write_to_ui);
+}
+
+void
+LV2PluginUI::on_external_ui_closed(void* controller)
+{
+       //printf("LV2PluginUI::on_external_ui_closed\n");
+       LV2PluginUI* me = (LV2PluginUI*)controller;
+       me->_screen_update_connection.disconnect();
+       me->_external_ui_ptr = NULL;
+}
+
+void
+LV2PluginUI::control_changed (uint32_t port_index)
+{
+       /* Must run in GUI thread because we modify _updates with no lock */
+       if (_lv2->get_parameter (port_index) != _values_last_sent_to_ui[port_index]) {
+               /* current plugin parameter does not match last value received
+                  from GUI, so queue an update to push it to the GUI during
+                  our regular timeout.
+               */
+               _updates.insert (port_index);
+       }
 }
 
 bool
 LV2PluginUI::start_updating(GdkEventAny*)
 {
-       if (!_output_ports.empty()) {
-               _screen_update_connection.disconnect();
-               _screen_update_connection = ARDOUR_UI::instance()->RapidScreenUpdate.connect
-                       (sigc::mem_fun(*this, &LV2PluginUI::output_update));
-       }
+       _screen_update_connection.disconnect();
+       _screen_update_connection = Timers::super_rapid_connect
+               (sigc::mem_fun(*this, &LV2PluginUI::output_update));
        return false;
 }
 
@@ -104,12 +231,21 @@ bool
 LV2PluginUI::stop_updating(GdkEventAny*)
 {
        //cout << "stop_updating" << endl;
+       _screen_update_connection.disconnect();
+       return false;
+}
 
-       if ( //!_external_ui_ptr &&
-           !_output_ports.empty()) {
-               _screen_update_connection.disconnect();
+void
+LV2PluginUI::queue_port_update()
+{
+       const uint32_t num_ports = _lv2->num_ports();
+       for (uint32_t i = 0; i < num_ports; ++i) {
+               bool     ok;
+               uint32_t port = _lv2->nth_parameter(i, ok);
+               if (ok) {
+                       _updates.insert (port);
+               }
        }
-       return false;
 }
 
 void
@@ -118,41 +254,111 @@ LV2PluginUI::output_update()
        //cout << "output_update" << endl;
        if (_external_ui_ptr) {
                LV2_EXTERNAL_UI_RUN(_external_ui_ptr);
+               if (_lv2->is_external_kx() && !_external_ui_ptr) {
+                       // clean up external UI if it closes itself via
+                       // on_external_ui_closed() during run()
+                       //printf("LV2PluginUI::output_update -- UI was closed\n");
+                       //_screen_update_connection.disconnect();
+                       _message_update_connection.disconnect();
+                       if (_inst) {
+                               suil_instance_free((SuilInstance*)_inst);
+                       }
+                       _inst = NULL;
+                       _external_ui_ptr = NULL;
+                       return;
+               }
+       }
+
+       if (!_inst) {
+               return;
        }
 
-       /* FIXME only works with control output ports (which is all we support now anyway) */
+       /* output ports (values set by DSP) need propagating to GUI */
+
        uint32_t nports = _output_ports.size();
        for (uint32_t i = 0; i < nports; ++i) {
                uint32_t index = _output_ports[i];
-               parameter_changed(index, _lv2->get_parameter(index));
+               float val = _lv2->get_parameter (index);
+
+               if (val != _values_last_sent_to_ui[index]) {
+                       /* Send to GUI */
+                       suil_instance_port_event ((SuilInstance*)_inst, index, 4, 0, &val);
+                       /* Cache current value */
+                       _values_last_sent_to_ui[index] = val;
+               }
        }
 
+       /* Input ports marked for update because the control value changed
+          since the last redisplay.
+       */
+
+       for (Updates::iterator i = _updates.begin(); i != _updates.end(); ++i) {
+               float val = _lv2->get_parameter (*i);
+               /* push current value to the GUI */
+               suil_instance_port_event ((SuilInstance*)_inst, (*i), 4, 0, &val);
+               _values_last_sent_to_ui[(*i)] = val;
+       }
+
+       _updates.clear ();
 }
 
 LV2PluginUI::LV2PluginUI(boost::shared_ptr<PluginInsert> pi,
                          boost::shared_ptr<LV2Plugin>    lv2p)
        : PlugUIBase(pi)
+       , _pi(pi)
        , _lv2(lv2p)
-       , _values(NULL)
+       , _gui_widget(NULL)
+       , _values_last_sent_to_ui(NULL)
        , _external_ui_ptr(NULL)
        , _inst(NULL)
 {
-       if (!_lv2->is_external_ui()) {
-               lv2ui_instantiate("gtk2gui");
+       _ardour_buttons_box.set_spacing (6);
+       _ardour_buttons_box.set_border_width (6);
+       _ardour_buttons_box.pack_end (focus_button, false, false);
+       _ardour_buttons_box.pack_end (bypass_button, false, false, 4);
+       if (pi->controls().size() > 0) {
+               _ardour_buttons_box.pack_end (reset_button, false, false, 4);
        }
+       _ardour_buttons_box.pack_end (delete_button, false, false);
+       _ardour_buttons_box.pack_end (save_button, false, false);
+       _ardour_buttons_box.pack_end (add_button, false, false);
+       _ardour_buttons_box.pack_end (_preset_combo, false, false);
+       _ardour_buttons_box.pack_end (_preset_modified, false, false);
+       _ardour_buttons_box.pack_end (pin_management_button, false, false);
+
+       plugin->PresetLoaded.connect (*this, invalidator (*this), boost::bind (&LV2PluginUI::queue_port_update, this), gui_context ());
 }
 
 void
 LV2PluginUI::lv2ui_instantiate(const std::string& title)
 {
-       LV2_Feature** features;
-       LV2_Feature** features_src;
-       LV2_Feature** features_dst;
-       size_t        features_count;
-       bool          is_external_ui;
+       bool          is_external_ui = _lv2->is_external_ui();
+       LV2_Feature** features_src   = const_cast<LV2_Feature**>(_lv2->features());
+       LV2_Feature** features       = const_cast<LV2_Feature**>(_lv2->features());
+       size_t        features_count = 0;
+       while (*features++) {
+               ++features_count;
+       }
+
+       if (is_external_ui) {
+               features = (LV2_Feature**)malloc(sizeof(LV2_Feature*) * (features_count + 4));
+       } else {
+               features = (LV2_Feature**)malloc(sizeof(LV2_Feature*) * (features_count + 3));
+       }
+
+       size_t fi = 0;
+       for (; fi < features_count; ++fi) {
+               features[fi] = features_src[fi];
+       }
+
+       _lv2ui_request_paramater.handle = this;
+       _lv2ui_request_paramater.request = LV2PluginUI::request_parameter;
+       _lv2ui_request_feature.URI  = LV2_UI_PREFIX "requestParameter";
+       _lv2ui_request_feature.data = &_lv2ui_request_paramater;
 
-       is_external_ui = _lv2->is_external_ui();
+       features[fi++] = &_lv2ui_request_feature;
 
+       Gtk::Alignment* container = NULL;
        if (is_external_ui) {
                _external_ui_host.ui_closed       = LV2PluginUI::on_external_ui_closed;
                _external_ui_host.plugin_human_id = strdup(title.c_str());
@@ -160,73 +366,86 @@ LV2PluginUI::lv2ui_instantiate(const std::string& title)
                _external_ui_feature.URI  = LV2_EXTERNAL_UI_URI;
                _external_ui_feature.data = &_external_ui_host;
 
-               features_src = features = (LV2_Feature**)_lv2->features();
-               features_count = 2;
-               while (*features++) {
-                       features_count++;
-               }
-               features_dst = features = (LV2_Feature**)malloc(
-                       sizeof(LV2_Feature*) * features_count);
-               features_dst[--features_count] = NULL;
-               features_dst[--features_count] = &_external_ui_feature;
-               while (features_count--) {
-                       *features++ = *features_src++;
-               }
+               _external_kxui_feature.URI  = LV2_EXTERNAL_UI_KX__Host;
+               _external_kxui_feature.data = &_external_ui_host;
+
+               features[fi++] = &_external_kxui_feature;
+               features[fi++] = &_external_ui_feature;
        } else {
-               features_dst = (LV2_Feature**)_lv2->features();
-       }
-
-#if defined(HAVE_NEW_SLV2) && defined(HAVE_SUIL)
-       if (!LV2PluginUI::ui_host) {
-               LV2PluginUI::ui_GtkUI = slv2_value_new_uri(
-                       ARDOUR::PluginManager::the_manager()->lv2_world()->world,
-                       "http://lv2plug.in/ns/extensions/ui#GtkUI");
-               LV2PluginUI::ui_host = suil_host_new(
-               LV2PluginUI::lv2_ui_write, NULL, NULL, NULL);
-       }
-       SLV2UI ui = _lv2->slv2_ui();
-
-       cerr << "get ui_GtkUI as URI\n";
-       slv2_value_as_uri (ui_GtkUI);
-       cerr << "get plugin as URI\n";
-       slv2_value_as_uri (slv2_plugin_get_uri(_lv2->slv2_plugin()));
-       cerr << "get ui as URI\n";
-       slv2_value_as_uri (slv2_ui_get_uri(ui));
-       cerr << "get ui_type as URI\n";
-       slv2_value_as_uri (_lv2->ui_type());
-       cerr << "get bundle as URI\n";
-       slv2_value_as_uri (slv2_ui_get_bundle_uri(ui));
-       cerr << "get binary as URI\n";
-       slv2_value_as_uri (slv2_ui_get_binary_uri(ui));
-       cerr << "Now instantiate the GUI...\n";
-       
-       _inst = suil_instance_new(
-               LV2PluginUI::ui_host,
-               this,
-               slv2_value_as_uri(ui_GtkUI),
-               slv2_value_as_uri(slv2_plugin_get_uri(_lv2->slv2_plugin())),
-               slv2_value_as_uri(slv2_ui_get_uri(ui)),
-               slv2_value_as_uri(_lv2->ui_type()),
-               slv2_uri_to_path(slv2_value_as_uri(slv2_ui_get_bundle_uri(ui))),
-               slv2_uri_to_path(slv2_value_as_uri(slv2_ui_get_binary_uri(ui))),
-               features_dst);
-#else
-       _inst = slv2_ui_instantiate(
-               _lv2->slv2_plugin(), _lv2->slv2_ui(), LV2PluginUI::lv2_ui_write, this,
-               features_dst);
-#endif
+               if (_ardour_buttons_box.get_parent()) {
+                       _ardour_buttons_box.get_parent()->remove(_ardour_buttons_box);
+               }
+               pack_start(_ardour_buttons_box, false, false);
+               _ardour_buttons_box.show_all();
 
-       if (is_external_ui) {
-               free(features_dst);
+               _gui_widget = Gtk::manage((container = new Gtk::Alignment()));
+               pack_start(*_gui_widget, true, true);
+               _gui_widget->show();
+
+               _parent_feature.URI  = LV2_UI__parent;
+               _parent_feature.data = _gui_widget->gobj();
+
+               features[fi++] = &_parent_feature;
        }
 
-#if defined(HAVE_NEW_SLV2) && defined(HAVE_SUIL)
-#define GET_WIDGET(inst) suil_instance_get_widget(inst);
+       features[fi] = NULL;
+       assert (fi == features_count + (is_external_ui ? 3 : 2));
+
+       if (!ui_host) {
+               ui_host = suil_host_new(LV2PluginUI::write_from_ui,
+                                       LV2PluginUI::port_index,
+                                       NULL, NULL);
+               suil_host_set_touch_func(ui_host, LV2PluginUI::touch);
+       }
+       const char* container_type = (is_external_ui)
+               ? NS_UI "external"
+               : NS_UI "GtkUI";
+
+       if (_lv2->has_message_output()) {
+               _lv2->enable_ui_emission();
+       }
+
+       const LilvUI*   ui     = (const LilvUI*)_lv2->c_ui();
+       const LilvNode* bundle = lilv_ui_get_bundle_uri(ui);
+       const LilvNode* binary = lilv_ui_get_binary_uri(ui);
+#ifdef HAVE_LILV_0_21_3
+       char* ui_bundle_path = lilv_file_uri_parse(lilv_node_as_uri(bundle), NULL);
+       char* ui_binary_path = lilv_file_uri_parse(lilv_node_as_uri(binary), NULL);
 #else
-#define GET_WIDGET(inst) slv2_ui_instance_get_widget(inst);
+       char* ui_bundle_path = strdup(lilv_uri_to_path(lilv_node_as_uri(bundle)));
+       char* ui_binary_path = strdup(lilv_uri_to_path(lilv_node_as_uri(binary)));
 #endif
+       if (!ui_bundle_path || !ui_binary_path) {
+               error << _("failed to get path for UI bindle or binary") << endmsg;
+               free(ui_bundle_path);
+               free(ui_binary_path);
+               free(features);
+               return;
+       }
+
+       _inst = suil_instance_new(
+               ui_host,
+               this,
+               container_type,
+               _lv2->uri(),
+               lilv_node_as_uri(lilv_ui_get_uri(ui)),
+               lilv_node_as_uri((const LilvNode*)_lv2->c_ui_type()),
+               ui_bundle_path,
+               ui_binary_path,
+               features);
+
+       free(ui_bundle_path);
+       free(ui_binary_path);
+       free(features);
 
-       uint32_t num_ports = slv2_plugin_get_num_ports(_lv2->slv2_plugin());
+       if (!_inst) {
+               error << _("failed to instantiate LV2 GUI") << endmsg;
+               return;
+       }
+
+#define GET_WIDGET(inst) suil_instance_get_widget((SuilInstance*)inst);
+
+       const uint32_t num_ports = _lv2->num_ports();
        for (uint32_t i = 0; i < num_ports; ++i) {
                if (_lv2->parameter_is_output(i)
                    && _lv2->parameter_is_control(i)
@@ -236,62 +455,94 @@ LV2PluginUI::lv2ui_instantiate(const std::string& title)
        }
 
        _external_ui_ptr = NULL;
-       if (_inst) {
-               if (!is_external_ui) {
-                       GtkWidget* c_widget = (GtkWidget*)GET_WIDGET(_inst);
-                       _gui_widget = Glib::wrap(c_widget);
-                       _gui_widget->show_all();
-                       pack_start(*_gui_widget, true, true);
-               } else {
-                       _external_ui_ptr = (struct lv2_external_ui*)GET_WIDGET(_inst);
+       if (!is_external_ui) {
+               GtkWidget* c_widget = (GtkWidget*)GET_WIDGET(_inst);
+               if (!c_widget) {
+                       error << _("failed to get LV2 UI widget") << endmsg;
+                       suil_instance_free((SuilInstance*)_inst);
+                       _inst = NULL;
+                       return;
+               }
+               if (!container->get_child()) {
+                       // Suil didn't add the UI to the container for us, so do it now
+                       container->add(*Gtk::manage(Glib::wrap(c_widget)));
                }
+               container->show_all();
+               gtk_widget_set_can_focus(c_widget, true);
+               gtk_widget_grab_focus(c_widget);
+       } else {
+               _external_ui_ptr = (struct lv2_external_ui*)GET_WIDGET(_inst);
        }
 
-       _values = new float[num_ports];
+       _values_last_sent_to_ui = new float[num_ports];
        _controllables.resize(num_ports);
+
        for (uint32_t i = 0; i < num_ports; ++i) {
                bool     ok;
                uint32_t port = _lv2->nth_parameter(i, ok);
                if (ok) {
-                       _values[port]        = _lv2->get_parameter(port);
+                       /* Cache initial value of the parameter, regardless of
+                          whether it is input or output
+                       */
+
+                       _values_last_sent_to_ui[port]        = _lv2->get_parameter(port);
                        _controllables[port] = boost::dynamic_pointer_cast<ARDOUR::AutomationControl> (
                                insert->control(Evoral::Parameter(PluginAutomation, 0, port)));
 
                        if (_lv2->parameter_is_control(port) && _lv2->parameter_is_input(port)) {
-                               parameter_update(port, _values[port]);
+                               if (_controllables[port]) {
+                                       _controllables[port]->Changed.connect (control_connections, invalidator (*this), boost::bind (&LV2PluginUI::control_changed, this, port), gui_context());
+                               }
                        }
+
+                       /* queue for first update ("push") to GUI */
+                       _updates.insert (port);
                }
        }
+
+       if (_lv2->has_message_output()) {
+               _message_update_connection = Timers::super_rapid_connect (
+                       sigc::mem_fun(*this, &LV2PluginUI::update_timeout));
+       }
 }
 
-LV2PluginUI::~LV2PluginUI ()
+void
+LV2PluginUI::grab_focus()
 {
-       //cout << "LV2PluginUI destructor called" << endl;
-
-       if (_values) {
-               delete[] _values;
+       if (_inst && !_lv2->is_external_ui()) {
+               GtkWidget* c_widget = (GtkWidget*)GET_WIDGET(_inst);
+               gtk_widget_grab_focus(c_widget);
        }
+}
 
-       /* Close and delete GUI. */
-#if defined(HAVE_NEW_SLV2) && defined(HAVE_SUIL)
-       suil_instance_free(_inst);
-#else
-       const LV2UI_Descriptor* ui_desc   = slv2_ui_instance_get_descriptor(_inst);
-       LV2UI_Handle            ui_handle = slv2_ui_instance_get_handle(_inst);
+void
+LV2PluginUI::lv2ui_free()
+{
+       stop_updating (0);
 
-       if (ui_desc) {
-               ui_desc->cleanup(ui_handle);
+       if (_gui_widget) {
+               remove (*_gui_widget);
+               _gui_widget = NULL;
        }
-#endif
 
+       if (_inst) {
+               suil_instance_free((SuilInstance*)_inst);
+               _inst = NULL;
+       }
+}
+
+LV2PluginUI::~LV2PluginUI ()
+{
+       delete [] _values_last_sent_to_ui;
+
+       _message_update_connection.disconnect();
        _screen_update_connection.disconnect();
 
-       if (_lv2->is_external_ui()) {
-               /* External UI is no longer valid.
-                  on_window_hide() will not try to use it if is NULL.
-               */
-               _external_ui_ptr = NULL;
+       if (_external_ui_ptr && _lv2->is_external_kx()) {
+               LV2_EXTERNAL_UI_HIDE(_external_ui_ptr);
        }
+       lv2ui_free();
+       _external_ui_ptr = NULL;
 }
 
 int
@@ -308,6 +559,12 @@ LV2PluginUI::get_preferred_width()
        return r.width;
 }
 
+bool
+LV2PluginUI::resizable()
+{
+       return _lv2->ui_is_resizable();
+}
+
 int
 LV2PluginUI::package(Gtk::Window& win)
 {
@@ -348,7 +605,15 @@ LV2PluginUI::on_window_show(const std::string& title)
 
        if (_lv2->is_external_ui()) {
                if (_external_ui_ptr) {
+                       _screen_update_connection.disconnect();
+                       _message_update_connection.disconnect();
                        LV2_EXTERNAL_UI_SHOW(_external_ui_ptr);
+                       _screen_update_connection = Timers::super_rapid_connect
+                       (sigc::mem_fun(*this, &LV2PluginUI::output_update));
+                       if (_lv2->has_message_output()) {
+                               _message_update_connection = Timers::super_rapid_connect (
+                                       sigc::mem_fun(*this, &LV2PluginUI::update_timeout));
+                       }
                        return false;
                }
                lv2ui_instantiate(title);
@@ -356,25 +621,38 @@ LV2PluginUI::on_window_show(const std::string& title)
                        return false;
                }
 
-               LV2_EXTERNAL_UI_SHOW(_external_ui_ptr);
                _screen_update_connection.disconnect();
-               _screen_update_connection = ARDOUR_UI::instance()->RapidScreenUpdate.connect
-                       (sigc::mem_fun(*this, &LV2PluginUI::output_update));
+               _message_update_connection.disconnect();
+               LV2_EXTERNAL_UI_SHOW(_external_ui_ptr);
+               _screen_update_connection = Timers::super_rapid_connect
+                       (sigc::mem_fun(*this, &LV2PluginUI::output_update));
+               if (_lv2->has_message_output()) {
+                       _message_update_connection = Timers::super_rapid_connect (
+                               sigc::mem_fun(*this, &LV2PluginUI::update_timeout));
+               }
                return false;
+       } else {
+               lv2ui_instantiate("gtk2gui");
        }
 
-       return true;
+       return _inst ? true : false;
 }
 
 void
 LV2PluginUI::on_window_hide()
 {
-       //cout << "on_window_hide" << endl; flush(cout);
+       //printf("LV2PluginUI::on_window_hide\n");
 
-       if (_external_ui_ptr) {
+       if (_lv2->is_external_ui()) {
+               if (!_external_ui_ptr) { return; }
                LV2_EXTERNAL_UI_HIDE(_external_ui_ptr);
-               //slv2_ui_instance_get_descriptor(_inst)->cleanup(_inst);
-               //_external_ui_ptr = NULL;
-               //_screen_update_connection.disconnect();
+               if (!_lv2->is_external_kx()) { return ; }
+               _message_update_connection.disconnect();
+               _screen_update_connection.disconnect();
+               _external_ui_ptr = NULL;
+               suil_instance_free((SuilInstance*)_inst);
+               _inst = NULL;
+       } else {
+               lv2ui_free();
        }
 }