def __init__(self, capacity, name=None, parent=None):
super(Carrousel, self).__init__(name=name, parent=parent)
# Container is empty
self._container = [None] * capacity
self._capacity = capacity
self._pos = 0
# object in the current position
self._current = self._container[self._pos]
# signals
self.changed = Signal()
self.moved = Signal()
class Carrousel(ContainerDevice):
def __init__(self, capacity, name=None, parent=None):
super(Carrousel, self).__init__(name=name, parent=parent)
# Container is empty
self._container = [None] * capacity
self._capacity = capacity
self._pos = 0
# object in the current position
self._current = self._container[self._pos]
# signals
self.changed = Signal()
self.moved = Signal()
def current(self):
return self._current
def pos(self):
return self._pos
def put_in_pos(self, obj, pos):
if pos >= self._capacity or pos < 0:
raise ValueError('position greater than capacity or negative')
self._container[pos] = obj
self._current = self._container[self._pos]
def move_to(self, pos):
if pos >= self._capacity or pos < 0:
raise ValueError('Position %d out of bounds' % pos)
if pos != self._pos:
self._pos = pos
self._current = self._container[self._pos]
self.changed.emit(self._pos)
self.moved.emit(self._pos)
def select(self, name):
# find pos of object with name
for idx, item in enumerate(self._container):
if item:
if isinstance(item, basestring):
if item == name:
return self.move_to(idx)
elif item.name == name:
return self.move_to(idx)
else:
pass
else:
raise ValueError('No object named %s' % name)
def config_info(self):
if self._current:
if isinstance(self._current, basestring):
label = self._current
else:
label = self._current.name
else:
label = 'Unknown'
return {'name': self.name, 'position': self._pos,
'label': label}
def configure(self, meta):
self.move_to(meta)