Add a PianoKeyboard to GenericUI (on a MIDI track)
[ardour.git] / gtk2_ardour / generic_pluginui.cc
index 4267d30a43362b4ae7338599d6a381dff7e9bf28..ba7e4d0058849e47c2dda40f697b64dc2c529cbc 100644 (file)
 #include <string>
 #include <vector>
 
+#include <gtkmm/separator.h>
+
 #include "pbd/stl_delete.h"
 #include "pbd/unwind.h"
 #include "pbd/xml++.h"
 #include "pbd/failed_constructor.h"
 
-#include <gtkmm2ext/click_box.h>
-#include <gtkmm2ext/fastmeter.h>
-#include <gtkmm2ext/barcontroller.h>
-#include <gtkmm2ext/utils.h>
-#include <gtkmm2ext/doi.h>
-#include <gtkmm2ext/slider_controller.h>
+#include "evoral/midi_events.h"
+#include "evoral/PatchChange.hpp"
+
+#include "midi++/midnam_patch.h"
 
+#include "ardour/midi_patch_manager.h"
+#include "ardour/midi_track.h"
 #include "ardour/plugin.h"
 #include "ardour/plugin_insert.h"
 #include "ardour/session.h"
 #include "ardour/value_as_string.h"
 
-#include "prompter.h"
+#include "gtkmm2ext/menu_elems.h"
+#include "gtkmm2ext/utils.h"
+#include "gtkmm2ext/doi.h"
+
+#include "widgets/ardour_knob.h"
+#include "widgets/click_box.h"
+#include "widgets/fastmeter.h"
+#include "widgets/slider_controller.h"
+#include "widgets/tooltips.h"
+
 #include "plugin_ui.h"
+#include "plugin_display.h"
 #include "gui_thread.h"
 #include "automation_controller.h"
-#include "ardour_knob.h"
 #include "gain_meter.h"
 #include "timers.h"
-#include "tooltips.h"
 #include "ui_config.h"
 
 #include "pbd/i18n.h"
@@ -60,6 +70,7 @@ using namespace std;
 using namespace ARDOUR;
 using namespace PBD;
 using namespace Gtkmm2ext;
+using namespace ArdourWidgets;
 using namespace Gtk;
 using namespace ARDOUR_UI_UTILS;
 
@@ -67,6 +78,11 @@ GenericPluginUI::GenericPluginUI (boost::shared_ptr<PluginInsert> pi, bool scrol
        : PlugUIBase (pi)
        , automation_menu (0)
        , is_scrollable(scrollable)
+       , _plugin_pianokeyboard_expander (_("MIDI Keyboard"))
+       , _piano (0)
+       , _pianomm (0)
+       , _piano_velocity (*manage (new Adjustment (100, 1, 127, 1, 16)))
+       , _piano_channel (*manage (new Adjustment (0, 1, 16, 1, 1)))
 {
        set_name ("PluginEditor");
        set_border_width (10);
@@ -77,9 +93,7 @@ GenericPluginUI::GenericPluginUI (boost::shared_ptr<PluginInsert> pi, bool scrol
 
        HBox* constraint_hbox = manage (new HBox);
        HBox* smaller_hbox = manage (new HBox);
-       HBox* automation_hbox = manage (new HBox);
        smaller_hbox->set_spacing (4);
-       automation_hbox->set_spacing (6);
        Label* combo_label = manage (new Label (_("<span size=\"large\">Presets</span>")));
        combo_label->set_use_markup (true);
 
@@ -93,7 +107,9 @@ GenericPluginUI::GenericPluginUI (boost::shared_ptr<PluginInsert> pi, bool scrol
        smaller_hbox->pack_start (add_button, false, false);
        smaller_hbox->pack_start (save_button, false, false);
        smaller_hbox->pack_start (delete_button, false, false);
-       smaller_hbox->pack_start (reset_button, false, false, 4);
+       if (pi->controls().size() > 0) {
+               smaller_hbox->pack_start (reset_button, false, false, 4);
+       }
        smaller_hbox->pack_start (bypass_button, false, true, 4);
 
        automation_manual_all_button.set_text(_("Manual"));
@@ -105,27 +121,60 @@ GenericPluginUI::GenericPluginUI (boost::shared_ptr<PluginInsert> pi, bool scrol
        automation_touch_all_button.set_text(_("Touch"));
        automation_touch_all_button.set_name (X_("generic button"));
 
-       Label* l = manage (new Label (_("All Automation")));
-       l->set_alignment (1.0, 0.5);
-       automation_hbox->pack_start (*l, true, true);
-       automation_hbox->pack_start (automation_manual_all_button, false, false);
-       automation_hbox->pack_start (automation_play_all_button, false, false);
-       automation_hbox->pack_start (automation_write_all_button, false, false);
-       automation_hbox->pack_start (automation_touch_all_button, false, false);
-
        constraint_hbox->set_spacing (5);
        constraint_hbox->set_homogeneous (false);
 
        VBox* v1_box = manage (new VBox);
        VBox* v2_box = manage (new VBox);
-       pack_end (plugin_analysis_expander, false, false);
+       if (pi->is_instrument ()) {
+               if (dynamic_cast<MidiTrack*> (pi->owner())) {
+                       _piano = (PianoKeyboard*)piano_keyboard_new();
+                       _pianomm = Glib::wrap((GtkWidget*)_piano);
+                       _pianomm->set_flags(Gtk::CAN_FOCUS);
+                       _pianomm->add_events(Gdk::KEY_PRESS_MASK|Gdk::KEY_RELEASE_MASK);
+
+                       g_signal_connect (G_OBJECT (_piano), "note-on", G_CALLBACK (GenericPluginUI::_note_on_event_handler), this);
+                       g_signal_connect (G_OBJECT (_piano), "note-off", G_CALLBACK (GenericPluginUI::_note_off_event_handler), this);
+
+                       HBox* box = manage (new HBox);
+                       box->pack_start (*manage (new Label (_("Channel:"))), false, false);
+                       box->pack_start (_piano_channel, false, false);
+                       box->pack_start (*manage (new Label (_("Velocity:"))), false, false);
+                       box->pack_start (_piano_velocity, false, false);
+
+                       Box* box2 = manage (new HBox ());
+                       box2->pack_start (*box, true, false);
+
+                       _pianobox.set_spacing (4);
+                       _pianobox.pack_start (*box2, true, true);
+                       _pianobox.pack_start (*_pianomm, true, true);
+
+                       _plugin_pianokeyboard_expander.set_expanded(false);
+                       _plugin_pianokeyboard_expander.property_expanded().signal_changed().connect( sigc::mem_fun(*this, &GenericPluginUI::toggle_pianokeyboard));
+
+                       pack_end (_plugin_pianokeyboard_expander, false, false);
+               }
+       } else {
+               pack_end (plugin_analysis_expander, false, false);
+       }
        if (!plugin->get_docs().empty()) {
                pack_end (description_expander, false, false);
        }
 
        v1_box->set_spacing (6);
        v1_box->pack_start (*smaller_hbox, false, true);
-       v1_box->pack_start (*automation_hbox, false, true);
+       if (pi->controls().size() > 0) {
+               HBox* automation_hbox = manage (new HBox);
+               automation_hbox->set_spacing (6);
+               Label* l = manage (new Label (_("All Automation")));
+               l->set_alignment (1.0, 0.5);
+               automation_hbox->pack_start (*l, true, true);
+               automation_hbox->pack_start (automation_manual_all_button, false, false);
+               automation_hbox->pack_start (automation_play_all_button, false, false);
+               automation_hbox->pack_start (automation_write_all_button, false, false);
+               automation_hbox->pack_start (automation_touch_all_button, false, false);
+               v1_box->pack_start (*automation_hbox, false, true);
+       }
        v2_box->pack_start (focus_button, false, true);
 
        main_contents.pack_start (settings_box, false, false);
@@ -135,23 +184,36 @@ GenericPluginUI::GenericPluginUI (boost::shared_ptr<PluginInsert> pi, bool scrol
 
        main_contents.pack_start (*constraint_hbox, false, false);
 
-       if (is_scrollable) {
-               Gtk::ScrolledWindow *scroller = manage (new Gtk::ScrolledWindow());
-               scroller->set_policy (Gtk::POLICY_NEVER, Gtk::POLICY_AUTOMATIC);
-               scroller->set_name ("PluginEditor");
-               scroller->add (hpacker);
-               main_contents.pack_start (*scroller, true, true);
-       } else {
-               main_contents.pack_start (hpacker, false, false);
-       }
-
        pi->ActiveChanged.connect (active_connection, invalidator (*this), boost::bind (&GenericPluginUI::processor_active_changed, this, boost::weak_ptr<Processor>(pi)), gui_context());
 
        bypass_button.set_active (!pi->enabled());
 
+       /* ScrolledWindow will wrap hpacker in a Viewport */
+       scroller.add (hpacker);
+       Viewport* view = static_cast<Viewport*>(scroller.get_child());
+       view->set_shadow_type(Gtk::SHADOW_NONE);
+
+       main_contents.pack_start (scroller, true, true);
+
        prefheight = 0;
        build ();
 
+       if (insert->plugin()->has_midnam() && insert->plugin()->knows_bank_patch()) {
+               /* right now PC are sent via MIDI Track controls only */
+               if (dynamic_cast<MidiTrack*> (insert->owner())) {
+                       build_midi_table ();
+               }
+       }
+
+       if (is_scrollable) {
+               scroller.set_policy (Gtk::POLICY_NEVER, Gtk::POLICY_AUTOMATIC);
+               scroller.set_name ("PluginEditor");
+       } else {
+               scroller.signal_size_request().connect (sigc::mem_fun(*this, &GenericPluginUI::scroller_size_request));
+               scroller.set_policy (Gtk::POLICY_AUTOMATIC, Gtk::POLICY_NEVER);
+       }
+
+
        /* Listen for property changes that are not notified normally because
         * AutomationControl has only support for numeric values currently.
         * The only case is Variant::PATH for now */
@@ -167,6 +229,40 @@ GenericPluginUI::~GenericPluginUI ()
        if (output_controls.size() > 0) {
                screen_update_connection.disconnect();
        }
+       delete _pianomm;
+}
+
+void
+GenericPluginUI::scroller_size_request (Gtk::Requisition* a)
+{
+       Glib::RefPtr<Gdk::Screen> screen = get_screen();
+       if (!screen)
+               screen = Gdk::Screen::get_default();
+
+       int maximum_width;
+       {
+               Gdk::Rectangle monitor;
+               const int monitor_num = screen->get_monitor_at_window (get_window ());
+               screen->get_monitor_geometry (
+                               (monitor_num < 0) ? 0 : monitor_num,
+                               monitor);
+
+               maximum_width = monitor.get_width() * 0.9;
+       }
+
+       GtkRequisition request = hpacker.size_request();
+
+       if (request.width > maximum_width) {
+               for (vector<ControlUI*>::const_iterator cuip = input_controls.begin();
+                                                       cuip != input_controls.end();
+                                                       ++cuip) {
+                       if (!(*cuip)->short_autostate)
+                               set_short_autostate(*cuip, true);
+               }
+               request = hpacker.size_request();
+       }
+
+       a->width = min(request.width, maximum_width);
 }
 
 // Some functions for calculating the 'similarity' of two plugin
@@ -358,10 +454,11 @@ GenericPluginUI::automatic_layout (const std::vector<ControlUI*>& control_uis)
        button_table->set_homogeneous (false);
        button_table->set_row_spacings (2);
        button_table->set_col_spacings (2);
+       button_table->set_border_width (5);
+
        output_table->set_homogeneous (true);
        output_table->set_row_spacings (2);
        output_table->set_col_spacings (2);
-       button_table->set_border_width (5);
        output_table->set_border_width (5);
 
 
@@ -525,6 +622,11 @@ GenericPluginUI::automatic_layout (const std::vector<ControlUI*>& control_uis)
        } else {
                delete output_table;
        }
+
+       if (plugin->has_inline_display () && plugin->inline_display_in_gui ()) {
+               PluginDisplay* pd = manage (new PluginDisplay (plugin, 300));
+               hpacker.pack_end (*pd, true, true);
+       }
        show_all();
 
 }
@@ -542,6 +644,148 @@ GenericPluginUI::custom_layout (const std::vector<ControlUI*>& control_uis)
                layout->attach (*cui, cui->x0, cui->x1, cui->y0, cui->y1, FILL, SHRINK, 2, 2);
        }
        hpacker.pack_start (*layout, true, true);
+
+       if (plugin->has_inline_display () && plugin->inline_display_in_gui ()) {
+               PluginDisplay* pd = manage (new PluginDisplay (plugin, 300));
+               hpacker.pack_end (*pd, true, true);
+       }
+}
+
+void
+GenericPluginUI::build_midi_table ()
+{
+       Gtk::Table* pgm_table = manage (new Gtk::Table (8, 2));
+
+       pgm_table->set_homogeneous (true);
+       pgm_table->set_row_spacings (2);
+       pgm_table->set_col_spacings (2);
+       pgm_table->set_border_width (5);
+
+       Frame* frame = manage (new Frame);
+       frame->set_name ("BaseFrame");
+       frame->set_label (_("MIDI Progams (sent to track)"));
+       //frame->set_label (_("MIDI Progams (volatile)"));
+       frame->add (*pgm_table);
+       hpacker.pack_start (*frame, true, true);
+
+       for (uint8_t chn = 0; chn < 16; ++chn) {
+               int col = chn / 8;
+               int row = chn % 8;
+               ArdourDropdown* cui = manage (new ArdourWidgets::ArdourDropdown ());
+               // TODO set size_request
+               cui->set_text_ellipsize (Pango::ELLIPSIZE_END);
+               cui->set_layout_ellipsize_width (PANGO_SCALE * 112 * UIConfiguration::instance ().get_ui_scale ());
+               midi_pgmsel.push_back (cui);
+               pgm_table->attach (*cui, col, col + 1, row, row+1, FILL|EXPAND, FILL);
+       }
+
+       midi_refill_patches ();
+
+       insert->plugin()->BankPatchChange.connect (
+                       midi_connections, invalidator (*this),
+                       boost::bind (&GenericPluginUI::midi_bank_patch_change, this, _1),
+                       gui_context());
+
+       /* Note: possible race with MidiTimeAxisView::update_patch_selector()
+        * which uses this signal to update/re-register the midnam (also in gui context).
+        * MTAV does register before us, so the midnam should already be updated when
+        * we're notified.
+        */
+       insert->plugin()->UpdateMidnam.connect (
+                       midi_connections, invalidator (*this),
+                       boost::bind (&GenericPluginUI::midi_refill_patches, this),
+                       gui_context());
+}
+
+void
+GenericPluginUI::midi_refill_patches ()
+{
+       assert (midi_pgmsel.size() == 16);
+
+       pgm_names.clear ();
+
+       const std::string model = insert->plugin ()->midnam_model ();
+       std::string mode;
+       const std::list<std::string> device_modes = MIDI::Name::MidiPatchManager::instance().custom_device_mode_names_by_model (model);
+       if (device_modes.size() > 0) {
+               mode = device_modes.front();
+       }
+
+       for (uint8_t chn = 0; chn < 16; ++chn) {
+               midi_pgmsel[chn]->clear_items ();
+               boost::shared_ptr<MIDI::Name::ChannelNameSet> cns =
+                       MIDI::Name::MidiPatchManager::instance().find_channel_name_set (model, mode, chn);
+
+               if (cns) {
+                       using namespace Menu_Helpers;
+                       using namespace Gtkmm2ext;
+
+                       for (MIDI::Name::ChannelNameSet::PatchBanks::const_iterator i = cns->patch_banks().begin(); i != cns->patch_banks().end(); ++i) {
+                               const MIDI::Name::PatchNameList& patches = (*i)->patch_name_list ();
+                               for (MIDI::Name::PatchNameList::const_iterator j = patches.begin(); j != patches.end(); ++j) {
+                                       const std::string pgm = (*j)->name ();
+                                       MIDI::Name::PatchPrimaryKey const& key = (*j)->patch_primary_key ();
+                                       assert ((*i)->number () == key.bank());
+                                       const uint32_t bp = (key.bank() << 7) | key.program();
+                                       midi_pgmsel[chn]->AddMenuElem (MenuElemNoMnemonic (pgm, sigc::bind (sigc::mem_fun (*this, &GenericPluginUI::midi_bank_patch_select), chn, bp)));
+                                       pgm_names[bp] = pgm;
+                               }
+                       }
+               }
+
+               midi_bank_patch_change (chn);
+       }
+}
+
+void
+GenericPluginUI::midi_bank_patch_change (uint8_t chn)
+{
+       assert (chn < 16 && midi_pgmsel.size() == 16);
+       uint32_t bankpgm = insert->plugin()->bank_patch (chn);
+       if (bankpgm == UINT32_MAX) {
+               midi_pgmsel[chn]->set_text (_("--Unset--"));
+       } else {
+               int bank = bankpgm >> 7;
+               int pgm = bankpgm & 127;
+               if (pgm_names.find (bankpgm) != pgm_names.end ()) {
+                       midi_pgmsel[chn]->set_text (pgm_names[bankpgm]);
+               } else {
+                       midi_pgmsel[chn]->set_text (string_compose ("Bank %1,%2 Pgm %3",
+                                               (bank >> 7) + 1, (bank & 127) + 1, pgm +1));
+               }
+       }
+}
+
+void
+GenericPluginUI::midi_bank_patch_select (uint8_t chn, uint32_t bankpgm)
+{
+       int bank = bankpgm >> 7;
+       int pgm = bankpgm & 127;
+       if (1) {
+               /* send to track */
+               MidiTrack* mt = dynamic_cast<MidiTrack*> (insert->owner());
+               if (!mt) {
+                       return;
+               }
+
+               boost::shared_ptr<AutomationControl> bank_msb = mt->automation_control(Evoral::Parameter (MidiCCAutomation, chn, MIDI_CTL_MSB_BANK), true);
+               boost::shared_ptr<AutomationControl> bank_lsb = mt->automation_control(Evoral::Parameter (MidiCCAutomation, chn, MIDI_CTL_LSB_BANK), true);
+               boost::shared_ptr<AutomationControl> program = mt->automation_control(Evoral::Parameter (MidiPgmChangeAutomation, chn), true);
+
+               bank_msb->set_value (bank >> 7, PBD::Controllable::NoGroup);
+               bank_lsb->set_value (bank & 127, PBD::Controllable::NoGroup);
+               program->set_value (pgm, PBD::Controllable::NoGroup);
+
+       } else {
+#if 0 // TODO inject directly to plugin..
+               const int cnt = insert->get_count();
+               for (int i=0; i < cnt; i++ ) {
+                       boost::shared_ptr<LV2Plugin> lv2i = boost::dynamic_pointer_cast<LV2Plugin> (insert->plugin(i));
+                       //lv2i->write_from_ui(port_index, format, buffer_size, (const uint8_t*)buffer);
+
+               }
+#endif
+       }
 }
 
 GenericPluginUI::ControlUI::ControlUI (const Evoral::Parameter& p)
@@ -560,13 +804,6 @@ GenericPluginUI::ControlUI::ControlUI (const Evoral::Parameter& p)
        automate_button.set_name ("plugin automation state button");
        set_tooltip (automate_button, _("Automation control"));
 
-       /* XXX translators: use a string here that will be at least as long
-          as the longest automation label (see ::automation_state_changed()
-          below). be sure to include a descender.
-       */
-
-       automate_button.set_sizing_text(_("Mgnual"));
-
        ignore_change = false;
        update_pending = false;
        button = false;
@@ -582,6 +819,21 @@ GenericPluginUI::ControlUI::~ControlUI()
        }
 }
 
+void
+GenericPluginUI::set_short_autostate (ControlUI* cui, bool value)
+{
+       cui->short_autostate = value;
+       if (value) {
+               cui->automate_button.set_sizing_text("M");
+       } else {
+               /* XXX translators: use a string here that will be at least as long
+                  as the longest automation label (see ::automation_state_changed()
+                  below). be sure to include a descender. */
+               cui->automate_button.set_sizing_text(_("Mgnual"));
+       }
+       automation_state_changed(cui);
+}
+
 void
 GenericPluginUI::automation_state_changed (ControlUI* cui)
 {
@@ -594,7 +846,7 @@ GenericPluginUI::automation_state_changed (ControlUI* cui)
 
        cui->automate_button.set_active((state != ARDOUR::Off));
 
-       if (cui->knobtable) {
+       if (cui->short_autostate) {
                cui->automate_button.set_text (
                                GainMeterBase::astate_string (state));
                return;
@@ -665,6 +917,7 @@ GenericPluginUI::build_control_ui (const Evoral::Parameter&             param,
        control_ui->label.set_alignment (0.0, 0.5);
        control_ui->label.set_name ("PluginParameterLabel");
        control_ui->set_spacing (5);
+       set_short_autostate(control_ui, false);
 
        if (is_input) {
 
@@ -730,6 +983,8 @@ GenericPluginUI::build_control_ui (const Evoral::Parameter&             param,
                                                           i->second)));
                        }
 
+                       control_ui->combo->set_controllable (mcontrol);
+
                        update_control_display(control_ui);
 
                } else {
@@ -752,13 +1007,14 @@ GenericPluginUI::build_control_ui (const Evoral::Parameter&             param,
                        Adjustment* adj = control_ui->controller->adjustment();
 
                        if (desc.integer_step && !desc.toggled) {
-                               control_ui->clickbox = new ClickBox (adj, "PluginUIClickBox", true);
+                               control_ui->clickbox = new ArdourWidgets::ClickBox (adj, "PluginUIClickBox", true);
                                Gtkmm2ext::set_size_request_to_display_given_text (*control_ui->clickbox, "g9999999", 2, 2);
                                if (desc.unit == ParameterDescriptor::MIDI_NOTE) {
                                        control_ui->clickbox->set_printer (sigc::bind (sigc::mem_fun (*this, &GenericPluginUI::midinote_printer), control_ui));
                                } else {
                                        control_ui->clickbox->set_printer (sigc::bind (sigc::mem_fun (*this, &GenericPluginUI::integer_printer), control_ui));
                                }
+                               control_ui->clickbox->set_controllable (mcontrol);
                        } else if (desc.toggled) {
                                ArdourButton* but = dynamic_cast<ArdourButton*> (control_ui->controller->widget());
                                assert(but);
@@ -781,7 +1037,7 @@ GenericPluginUI::build_control_ui (const Evoral::Parameter&             param,
                }
 
                if (use_knob) {
-                       control_ui->automate_button.set_sizing_text("M");
+                       set_short_autostate(control_ui, true);
 
                        control_ui->label.set_alignment (0.5, 0.5);
                        control_ui->knobtable = manage (new Table());
@@ -1089,11 +1345,7 @@ GenericPluginUI::output_update ()
                (*i)->display_label->set_text (buf);
 
                if ((*i)->meterinfo && (*i)->meterinfo->packed) {
-                       const float upper = c->desc().upper;
-                       const float lower = c->desc().lower;
-                       val = std::min (upper, std::max (lower, val));
-                       float lval = (val - lower / (upper - lower));
-                       (*i)->meterinfo->meter->set (lval);
+                       (*i)->meterinfo->meter->set (c->desc().to_interface (val));
                }
        }
 }
@@ -1115,3 +1367,64 @@ GenericPluginUI::path_property_changed (uint32_t key, const Variant& value)
                std::cerr << "warning: property change for property with no control" << std::endl;
        }
 }
+
+void
+GenericPluginUI::toggle_pianokeyboard ()
+{
+       if (_plugin_pianokeyboard_expander.get_expanded()) {
+               _plugin_pianokeyboard_expander.add (_pianobox);
+               _pianobox.show_all ();
+       } else {
+               const int child_height = _plugin_pianokeyboard_expander.get_child ()->get_height ();
+               _plugin_pianokeyboard_expander.get_child ()->hide ();
+               _plugin_pianokeyboard_expander.remove ();
+
+               Gtk::Window *toplevel = (Gtk::Window*) _plugin_pianokeyboard_expander.get_ancestor (GTK_TYPE_WINDOW);
+               if (toplevel) {
+                       Gtk::Requisition wr;
+                       toplevel->get_size (wr.width, wr.height);
+                       wr.height -= child_height;
+                       toplevel->resize (wr.width, wr.height);
+               }
+       }
+}
+
+void
+GenericPluginUI::_note_on_event_handler(GtkWidget*, int note, gpointer arg)
+{
+       ((GenericPluginUI*)arg)->note_on_event_handler(note);
+}
+
+void
+GenericPluginUI::_note_off_event_handler(GtkWidget*, int note, gpointer arg)
+{
+       ((GenericPluginUI*)arg)->note_off_event_handler(note);
+}
+
+void
+GenericPluginUI::note_on_event_handler (int note)
+{
+       // TODO add option to send to synth directly (bypass track)
+       MidiTrack* mt = dynamic_cast<MidiTrack*> (insert->owner());
+       if (!mt) { return; }
+       _pianomm->grab_focus ();
+       uint8_t channel = _piano_channel.get_value_as_int () - 1;
+       uint8_t event[3];
+       event[0] = (MIDI_CMD_NOTE_ON | channel);
+       event[1] = note;
+       event[2] = _piano_velocity.get_value_as_int ();
+       mt->write_immediate_event (3, event);
+}
+
+void
+GenericPluginUI::note_off_event_handler (int note)
+{
+       MidiTrack* mt = dynamic_cast<MidiTrack*> (insert->owner());
+       if (!mt) { return; }
+       uint8_t channel = _piano_channel.get_value_as_int () - 1;
+       uint8_t event[3];
+       event[0] = (MIDI_CMD_NOTE_OFF | channel);
+       event[1] = note;
+       event[2] = 0;
+       mt->write_immediate_event (3, event);
+}