diff options
Diffstat (limited to 'sugar/graphics/timeline.py')
| -rw-r--r-- | sugar/graphics/timeline.py | 182 |
1 files changed, 91 insertions, 91 deletions
diff --git a/sugar/graphics/timeline.py b/sugar/graphics/timeline.py index 5c40ca5..3944771 100644 --- a/sugar/graphics/timeline.py +++ b/sugar/graphics/timeline.py @@ -18,100 +18,100 @@ import gobject class _Tag: - def __init__(self, name, start_frame, end_frame): - self.name = name - self.start_frame = start_frame - self.end_frame = end_frame + def __init__(self, name, start_frame, end_frame): + self.name = name + self.start_frame = start_frame + self.end_frame = end_frame class TimelineObserver: - def __init__(self, observer): - self._observer = observer + def __init__(self, observer): + self._observer = observer - def next_frame(self, tag, current_frame, n_frames): - try: - method = getattr(self._observer, 'do_' + tag) - except AttributeError: - method = None + def next_frame(self, tag, current_frame, n_frames): + try: + method = getattr(self._observer, 'do_' + tag) + except AttributeError: + method = None - if method: - method(current_frame, n_frames) + if method: + method(current_frame, n_frames) class Timeline: - def __init__(self, observer): - self._fps = 12 - self._tags = [] - self._name_to_tag = {} - self._current_frame = 0 - self._timeout_sid = 0 - self._observer = TimelineObserver(observer) - - def add_tag(self, name, start_frame, end_frame): - tag = _Tag(name, start_frame, end_frame) - self._tags.append(tag) - self._name_to_tag[name] = tag - - def remove_tag(self, name): - tag = self._tags[name] - self._tags.remove(tag) - del self._tags[name] - - def _next_frame(self, tag, frame): - n_frames = tag.start_frame - tag.end_frame - self._observer.next_frame(tag.name, frame, n_frames) - - def goto(self, tag_name, end_frame=False): - self.pause() - - tag = self._name_to_tag[tag_name] - if end_frame: - self._current_frame = tag.end_frame - else: - self._current_frame = tag.start_frame - - self._next_frame(tag, self._current_frame) - - def on_tag(self, name): - tag = self._name_to_tag[name] - return (tag.start_frame <= self._current_frame and \ - tag.end_frame >= self._current_frame) - - def _get_tags_for_frame(self, frame): - result = [] - for tag in self._tags: - if tag.start_frame <= frame and tag.end_frame >= frame: - result.append(tag) - return result - - def _timeout_cb(self, end_frame): - for tag in self._get_tags_for_frame(self._current_frame): - cur_frame = self._current_frame - tag.start_frame - self._next_frame(tag, cur_frame) - - if self._current_frame < end_frame: - self._current_frame += 1 - return True - else: - return False - - def play(self, start_tag=None, stop_tag=None): - self.pause() - - if start_tag == None: - start = 0 - else: - start = self._name_to_tag[start_tag].start_frame - - if stop_tag == None: - end = self._tags[len(self._tags) - 1].end_frame - else: - end = self._name_to_tag[stop_tag].end_frame - - self._current_frame = start - - interval = 1000 / self._fps - self._timeout_sid = gobject.timeout_add( - interval, self._timeout_cb, end) - - def pause(self): - if self._timeout_sid > 0: - gobject.source_remove(self._timeout_sid) + def __init__(self, observer): + self._fps = 12 + self._tags = [] + self._name_to_tag = {} + self._current_frame = 0 + self._timeout_sid = 0 + self._observer = TimelineObserver(observer) + + def add_tag(self, name, start_frame, end_frame): + tag = _Tag(name, start_frame, end_frame) + self._tags.append(tag) + self._name_to_tag[name] = tag + + def remove_tag(self, name): + tag = self._tags[name] + self._tags.remove(tag) + del self._tags[name] + + def _next_frame(self, tag, frame): + n_frames = tag.start_frame - tag.end_frame + self._observer.next_frame(tag.name, frame, n_frames) + + def goto(self, tag_name, end_frame=False): + self.pause() + + tag = self._name_to_tag[tag_name] + if end_frame: + self._current_frame = tag.end_frame + else: + self._current_frame = tag.start_frame + + self._next_frame(tag, self._current_frame) + + def on_tag(self, name): + tag = self._name_to_tag[name] + return (tag.start_frame <= self._current_frame and \ + tag.end_frame >= self._current_frame) + + def _get_tags_for_frame(self, frame): + result = [] + for tag in self._tags: + if tag.start_frame <= frame and tag.end_frame >= frame: + result.append(tag) + return result + + def _timeout_cb(self, end_frame): + for tag in self._get_tags_for_frame(self._current_frame): + cur_frame = self._current_frame - tag.start_frame + self._next_frame(tag, cur_frame) + + if self._current_frame < end_frame: + self._current_frame += 1 + return True + else: + return False + + def play(self, start_tag=None, stop_tag=None): + self.pause() + + if start_tag == None: + start = 0 + else: + start = self._name_to_tag[start_tag].start_frame + + if stop_tag == None: + end = self._tags[len(self._tags) - 1].end_frame + else: + end = self._name_to_tag[stop_tag].end_frame + + self._current_frame = start + + interval = 1000 / self._fps + self._timeout_sid = gobject.timeout_add( + interval, self._timeout_cb, end) + + def pause(self): + if self._timeout_sid > 0: + gobject.source_remove(self._timeout_sid) |