diff options
Diffstat (limited to 'libs/gtkmm2ext/controller.cc')
-rw-r--r-- | libs/gtkmm2ext/controller.cc | 92 |
1 files changed, 92 insertions, 0 deletions
diff --git a/libs/gtkmm2ext/controller.cc b/libs/gtkmm2ext/controller.cc new file mode 100644 index 0000000000..98d5566c69 --- /dev/null +++ b/libs/gtkmm2ext/controller.cc @@ -0,0 +1,92 @@ +/* + Copyright (C) 1998-99 Paul Davis + 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., 675 Mass Ave, Cambridge, MA 02139, USA. + + $Id$ +*/ + +#include <string> +#include <climits> + +#include <midi++/channel.h> +#include <gtkmm2ext/gtk_ui.h> +#include <gtkmm2ext/controller.h> + +#include "i18n.h" + +using namespace Gtkmm2ext; + +Controller::Controller (Gtk::Adjustment *adj, MIDI::Port *p) + : MIDI::Controllable (p), + adjustment (adj), + prompter (Gtk::WIN_POS_MOUSE, 30000, false) +{ + new_value_pending = false; + + /* hear about MIDI control learning */ + + learning_started.connect + (mem_fun (*this, &Controller::midicontrol_prompt)); + learning_stopped.connect + (mem_fun (*this, &Controller::midicontrol_unprompt)); +} + +void +Controller::midicontrol_prompt () + +{ + string prompt = _("operate MIDI controller now"); + + prompter.set_text (prompt); + Gtkmm2ext::UI::instance()->touch_display (&prompter); +} + +void +Controller::midicontrol_unprompt () + +{ + Gtkmm2ext::UI::instance()->touch_display (&prompter); +} + +int +Controller::update_controller_value (void *arg) + +{ + Controller *c = (Controller *) arg; + + c->adjustment->set_value (c->new_value); + c->new_value_pending = false; + + return FALSE; +} + +void +Controller::set_value (float v) + +{ + /* This is called from a MIDI callback. It could happen + a thousand times a second, or more. Therefore, instead + of going straight to the X server, which may not work for + thread-related reasons, simply request an update whenever + the GTK main loop is idle. + */ + + new_value = v; + + if (!new_value_pending) { + new_value_pending = true; + Gtkmm2ext::UI::instance()->idle_add (update_controller_value, this); + } +} |