def find_sub_atom(self, *atom_names):
reader = self.reader
for (last, next_atom) in iter_last(iter(atom_names)):
try:
(length, stream_atom) = reader.parse("32u 4b")
while (stream_atom != next_atom):
reader.skip_bytes(length - 8)
(length, stream_atom) = reader.parse("32u 4b")
if (last):
return reader.substream(length - 8)
else:
reader = reader.substream(length - 8)
except IOError:
raise KeyError(next_atom)
def set_keys(self, keys):
"""keys is a [(key, action), ...] list
where 'key' and 'action' are both strings"""
if (len(keys) > 0):
text = []
for (last, (key, action)) in audiotools.iter_last(iter(keys)):
text.append(('key', key))
text.append(u" - " + action)
if (not last):
text.append(u" ")
self.status.set_text(text)
else:
self.status.set_text(u"")
def find_sub_atom(self, *atom_names):
reader = self.reader
for (last, next_atom) in iter_last(iter(atom_names)):
try:
(length, stream_atom) = reader.parse("32u 4b")
while (stream_atom != next_atom):
reader.skip_bytes(length - 8)
(length, stream_atom) = reader.parse("32u 4b")
if (last):
return reader.substream(length - 8)
else:
reader = reader.substream(length - 8)
except IOError:
raise KeyError(next_atom)
def get_m4a_atom(reader, *atoms):
"""given a BitstreamReader and atom name strings
returns a (size, substream) of the final atom data
(not including its 64-bit size/name header)
after traversing the parent atoms
"""
for (last, next_atom) in iter_last(iter(atoms)):
try:
(length, stream_atom) = reader.parse("32u 4b")
while stream_atom != next_atom:
reader.skip_bytes(length - 8)
(length, stream_atom) = reader.parse("32u 4b")
if last:
return (length - 8, reader.substream(length - 8))
else:
reader = reader.substream(length - 8)
except IOError:
raise KeyError(next_atom)
def __init__(self, albums, select_item):
"""takes a list of Album objects
and a select_item() callback for when an album or track is selected
and returns a tree-like widget for editing an album or tracks"""
self.albums = albums
self.radios = [] # all our radio button-like checkboxes
rows = []
def unselect_others(checkbox, state_change):
for radio in self.radios:
if (radio is not checkbox):
radio.set_state(False, do_callback=False)
for album in albums:
#the checkbox for selecting an album
checkbox = urwid.CheckBox(u"",
on_state_change=select_item,
user_data=album)
urwid.connect_signal(checkbox, "change", unselect_others)
self.radios.append(checkbox)
#setup album row depending on if it has an album number or not
if (album.number != 0):
album_digits = len(str(album.number))
rows.append(
urwid.Columns(
[("fixed", 4, checkbox),
("fixed", album_digits + 1,
urwid.Text(u"%%%d.d " % (album_digits) % \
(album.number))),
("fixed", 2, urwid.Text(u": ")),
("weight", 1, album.album_name)]))
else:
rows.append(
urwid.Columns([("fixed", 4, checkbox),
("fixed", 2, urwid.Text(u": ")),
("weight", 1, album.album_name)]))
#the largest number of digits in a track_number field
track_digits = max([len(str(t.metadata.track_number))
for t in album.tracks])
#setup track rows
for (last, track) in audiotools.iter_last(iter(album.tracks)):
#the checkbox for selecting a track
checkbox = urwid.CheckBox(u"",
on_state_change=select_item,
user_data=track)
urwid.connect_signal(checkbox, "change", unselect_others)
self.radios.append(checkbox)
#prefixed differently depending on its position
if (last):
prefix = u" \u2514\u2500"
else:
prefix = u" \u251c\u2500"
#setup track row
rows.append(
urwid.Columns(
[("fixed", len(prefix), urwid.Text(prefix)),
("fixed", 4, checkbox),
("fixed", track_digits + 1,
urwid.Text(u"%%%d.d " % (track_digits) % \
(track.metadata.track_number))),
("fixed", 2, urwid.Text(u": ")),
("weight", 1, track.track_name)]))
urwid.Pile.__init__(self, rows)
