93 lines
2.2 KiB
C++
93 lines
2.2 KiB
C++
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/*
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Copyright (C) 1998-99 Paul Davis
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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$Id$
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*/
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#include <string>
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#include <climits>
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#include <midi++/channel.h>
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#include <gtkmm2ext/gtk_ui.h>
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#include <gtkmm2ext/controller.h>
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#include "i18n.h"
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using namespace Gtkmm2ext;
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Controller::Controller (Gtk::Adjustment *adj, MIDI::Port *p)
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: MIDI::Controllable (p),
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adjustment (adj),
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prompter (Gtk::WIN_POS_MOUSE, 30000, false)
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{
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new_value_pending = false;
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/* hear about MIDI control learning */
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learning_started.connect
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(mem_fun (*this, &Controller::midicontrol_prompt));
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learning_stopped.connect
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(mem_fun (*this, &Controller::midicontrol_unprompt));
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}
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void
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Controller::midicontrol_prompt ()
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{
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string prompt = _("operate MIDI controller now");
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prompter.set_text (prompt);
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Gtkmm2ext::UI::instance()->touch_display (&prompter);
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}
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void
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Controller::midicontrol_unprompt ()
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{
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Gtkmm2ext::UI::instance()->touch_display (&prompter);
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}
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int
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Controller::update_controller_value (void *arg)
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{
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Controller *c = (Controller *) arg;
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c->adjustment->set_value (c->new_value);
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c->new_value_pending = false;
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return FALSE;
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}
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void
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Controller::set_value (float v)
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{
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/* This is called from a MIDI callback. It could happen
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a thousand times a second, or more. Therefore, instead
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of going straight to the X server, which may not work for
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thread-related reasons, simply request an update whenever
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the GTK main loop is idle.
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*/
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new_value = v;
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if (!new_value_pending) {
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new_value_pending = true;
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Gtkmm2ext::UI::instance()->idle_add (update_controller_value, this);
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}
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}
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