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import Live

from _Framework.SessionZoomingComponent import SessionZoomingComponent

from _Framework.ButtonElement import ButtonElement

class SpecialZoomingComponent(SessionZoomingComponent):

' Special ZoomingComponent that uses clip stop buttons for stop all when zoomed '

__module__ = __name__

def __init__(self, session):

SessionZoomingComponent.__init__(self, session)

def _scroll_up(self):

height = self._session.height()

track_offset = self._session.track_offset()

scene_offset = self._session.scene_offset()

if scene_offset > 0:

new_scene_offset = scene_offset

if scene_offset % height > 0:

new_scene_offset -= (scene_offset % height)

else:

new_scene_offset = max(0, scene_offset - height)

self._session.set_offsets(track_offset, new_scene_offset)

def _scroll_down(self):

height = self._session.height()

track_offset = self._session.track_offset()

scene_offset = self._session.scene_offset()

new_scene_offset = scene_offset + height - (scene_offset % height)

self._session.set_offsets(track_offset, new_scene_offset)

def _scroll_left(self):

width = self._session.width()

track_offset = self._session.track_offset()

scene_offset = self._session.scene_offset()

if track_offset > 0:

new_track_offset = track_offset

if track_offset % width > 0:

new_track_offset -= (track_offset % width)

else:

new_track_offset = max(0, track_offset - width)

self._session.set_offsets(new_track_offset, scene_offset)

def _scroll_right(self):

width = self._session.width()

track_offset = self._session.track_offset()

scene_offset = self._session.scene_offset()

new_track_offset = track_offset + width - (track_offset % width)

self._session.set_offsets(new_track_offset, scene_offset)