Super basic Virtual-Keyboard UI

1 files changed, 111 insertions, 0 deletions

diff --git a/gtk2_ardour/virtual_keyboard_window.cc b/gtk2_ardour/virtual_keyboard_window.cc
new file mode 100644
index 0000000000..65efd089aa
--- /dev/null
+++ b/gtk2_ardour/virtual_keyboard_window.cc
@@ -0,0 +1,111 @@
+/*
+ * Copyright (C) 2019 Robin Gareus <robin@gareus.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * 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.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include <gtkmm/box.h>
+
+#include "ardour/async_midi_port.h"
+
+#include "ardour_ui.h"
+#include "virtual_keyboard_window.h"
+#include "utils.h"
+
+#include "pbd/i18n.h"
+
+using namespace Glib;
+using namespace Gtk;
+
+VirtualKeyboardWindow::VirtualKeyboardWindow ()
+	: ArdourWindow (_("Virtual Keyboard"))
+	, _piano_velocity (*manage (new Adjustment (100, 1, 127, 1, 16)))
+	, _piano_channel (*manage (new Adjustment (0, 1, 16, 1, 1)))
+{
+	_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 (VirtualKeyboardWindow::_note_on_event_handler), this);
+	g_signal_connect (G_OBJECT (_piano), "note-off", G_CALLBACK (VirtualKeyboardWindow::_note_off_event_handler), this);
+
+	piano_keyboard_set_keyboard_layout (_piano, "QWERTY");
+
+	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);
+
+	VBox* vbox = manage (new VBox);
+	vbox->pack_start (*box2, false, false, 4);
+	vbox->pack_start (*_pianomm, true, true);
+	add (*vbox);
+
+	set_keep_above (true);
+	vbox->show_all();
+}
+
+VirtualKeyboardWindow::~VirtualKeyboardWindow ()
+{
+	delete _pianomm;
+}
+
+void
+VirtualKeyboardWindow::on_unmap ()
+{
+	ArdourWindow::on_unmap ();
+	ARDOUR_UI::instance()->reset_focus (this);
+}
+
+bool
+VirtualKeyboardWindow::on_key_press_event (GdkEventKey* ev)
+{
+	return ARDOUR_UI_UTILS::relay_key_press (ev, this);
+}
+
+void
+VirtualKeyboardWindow::note_on_event_handler (int note)
+{
+	_pianomm->grab_focus ();
+	if (!_session) {
+		return;
+	}
+	uint8_t channel = _piano_channel.get_value_as_int () - 1;
+	uint8_t ev[3];
+	ev[0] = (MIDI_CMD_NOTE_ON | channel);
+	ev[1] = note;
+	ev[2] = _piano_velocity.get_value_as_int ();
+	boost::dynamic_pointer_cast<ARDOUR::AsyncMIDIPort>(_session->vkbd_output_port())->write (ev, 3, 0);
+}
+
+void
+VirtualKeyboardWindow::note_off_event_handler (int note)
+{
+	if (!_session) {
+		return;
+	}
+
+	uint8_t channel = _piano_channel.get_value_as_int () - 1;
+	uint8_t ev[3];
+	ev[0] = (MIDI_CMD_NOTE_OFF | channel);
+	ev[1] = note;
+	ev[2] = 0;
+	boost::dynamic_pointer_cast<ARDOUR::AsyncMIDIPort>(_session->vkbd_output_port())->write (ev, 3, 0);
+}