class DefaultNoteExpr(QWidget, AudioUnitUpdater):
def __init__(self):
super().__init__()
self._expr_names = KqtComboBox()
h = QHBoxLayout()
h.setContentsMargins(0, 0, 0, 0)
h.setSpacing(4)
h.addWidget(QLabel('Default note expression:'))
h.addWidget(self._expr_names, 1)
self.setLayout(h)
def _on_setup(self):
self.register_action(self._get_list_update_signal_type(),
self._update_contents)
self.register_action(self._get_default_update_signal_type(),
self._update_contents)
self._expr_names.currentIndexChanged.connect(self._change_expression)
self._update_contents()
def _get_list_update_signal_type(self):
return 'signal_expr_list_{}'.format(self._au_id)
def _get_default_update_signal_type(self):
return 'signal_expr_default_{}'.format(self._au_id)
def _get_audio_unit(self):
module = self._ui_model.get_module()
au = module.get_audio_unit(self._au_id)
return au
def _update_contents(self):
au = self._get_audio_unit()
names = sorted(au.get_expression_names())
selection = au.get_default_note_expression()
old_block = self._expr_names.blockSignals(True)
self._expr_names.setEnabled(len(names) > 0)
self._expr_names.set_items(chain(['(none)'], (name for name in names)))
try:
self._expr_names.setCurrentIndex(names.index(selection) + 1)
except ValueError:
self._expr_names.setCurrentIndex(0)
self._expr_names.blockSignals(old_block)
def _change_expression(self, item_index):
au = self._get_audio_unit()
if item_index == 0:
au.set_default_note_expression('')
else:
expr_name = self._expr_names.itemText(item_index)
au.set_default_note_expression(expr_name)
class DefaultNoteExpr(QWidget):
def __init__(self):
super().__init__()
self._au_id = None
self._ui_model = None
self._updater = None
self._expr_names = KqtComboBox()
h = QHBoxLayout()
h.setContentsMargins(0, 0, 0, 0)
h.setSpacing(4)
h.addWidget(QLabel('Default note expression:'))
h.addWidget(self._expr_names, 1)
self.setLayout(h)
def set_au_id(self, au_id):
self._au_id = au_id
def set_ui_model(self, ui_model):
self._ui_model = ui_model
self._updater = ui_model.get_updater()
self._updater.register_updater(self._perform_updates)
QObject.connect(
self._expr_names,
SIGNAL('currentIndexChanged(int)'),
self._change_expression)
self._update_contents()
def unregister_updaters(self):
self._updater.unregister_updater(self._perform_updates)
def _get_list_update_signal_type(self):
return 'signal_expr_list_{}'.format(self._au_id)
def _get_default_update_signal_type(self):
return 'signal_expr_default_{}'.format(self._au_id)
def _perform_updates(self, signals):
update_signals = set([
self._get_list_update_signal_type(), self._get_default_update_signal_type()])
if not signals.isdisjoint(update_signals):
self._update_contents()
def _get_audio_unit(self):
module = self._ui_model.get_module()
au = module.get_audio_unit(self._au_id)
return au
def _update_contents(self):
au = self._get_audio_unit()
names = sorted(au.get_expression_names())
selection = au.get_default_note_expression()
old_block = self._expr_names.blockSignals(True)
self._expr_names.setEnabled(len(names) > 0)
self._expr_names.set_items(chain(['(none)'], (name for name in names)))
try:
self._expr_names.setCurrentIndex(names.index(selection) + 1)
except ValueError:
self._expr_names.setCurrentIndex(0)
self._expr_names.blockSignals(old_block)
def _change_expression(self, item_index):
au = self._get_audio_unit()
if item_index == 0:
au.set_default_note_expression('')
else:
expr_name = self._expr_names.itemText(item_index)
au.set_default_note_expression(expr_name)
