Drop `BarItems.update_from_array()`; moved into `Flow`
Tyler Goodlet
parent
e3dd933b34
commit
b7f7296f3a
|
|
@ -325,289 +325,6 @@ class BarItems(pg.GraphicsObject):
|
|||
else:
|
||||
return 0
|
||||
|
||||
# def update_from_array(
|
||||
# self,
|
||||
|
||||
# # full array input history
|
||||
# ohlc: np.ndarray,
|
||||
|
||||
# # pre-sliced array data that's "in view"
|
||||
# ohlc_iv: np.ndarray,
|
||||
|
||||
# view_range: Optional[tuple[int, int]] = None,
|
||||
# profiler: Optional[pg.debug.Profiler] = None,
|
||||
|
||||
# ) -> None:
|
||||
# '''
|
||||
# Update the last datum's bar graphic from input data array.
|
||||
|
||||
# This routine should be interface compatible with
|
||||
# ``pg.PlotCurveItem.setData()``. Normally this method in
|
||||
# ``pyqtgraph`` seems to update all the data passed to the
|
||||
# graphics object, and then update/rerender, but here we're
|
||||
# assuming the prior graphics havent changed (OHLC history rarely
|
||||
# does) so this "should" be simpler and faster.
|
||||
|
||||
# This routine should be made (transitively) as fast as possible.
|
||||
|
||||
# '''
|
||||
# profiler = profiler or pg.debug.Profiler(
|
||||
# disabled=not pg_profile_enabled(),
|
||||
# ms_threshold=ms_slower_then,
|
||||
# delayed=True,
|
||||
# )
|
||||
|
||||
# # index = self.start_index
|
||||
# istart, istop = self._xrange
|
||||
# # ds_istart, ds_istop = self._ds_xrange
|
||||
|
||||
# index = ohlc['index']
|
||||
# first_index, last_index = index[0], index[-1]
|
||||
|
||||
# # length = len(ohlc)
|
||||
# # prepend_length = istart - first_index
|
||||
# # append_length = last_index - istop
|
||||
|
||||
# # ds_prepend_length = ds_istart - first_index
|
||||
# # ds_append_length = last_index - ds_istop
|
||||
|
||||
# flip_cache = False
|
||||
|
||||
# x_gt = 16
|
||||
# if self._ds_line:
|
||||
# uppx = self._ds_line.x_uppx()
|
||||
# else:
|
||||
# uppx = 0
|
||||
|
||||
# should_line = self._in_ds
|
||||
# if (
|
||||
# self._in_ds
|
||||
# and uppx < x_gt
|
||||
# ):
|
||||
# should_line = False
|
||||
|
||||
# elif (
|
||||
# not self._in_ds
|
||||
# and uppx >= x_gt
|
||||
# ):
|
||||
# should_line = True
|
||||
|
||||
# profiler('ds logic complete')
|
||||
|
||||
# if should_line:
|
||||
# # update the line graphic
|
||||
# # x, y = self._ds_line_xy = ohlc_flatten(ohlc_iv)
|
||||
# x, y = self._ds_line_xy = ohlc_flatten(ohlc)
|
||||
# x_iv, y_iv = self._ds_line_xy = ohlc_flatten(ohlc_iv)
|
||||
# profiler('flattening bars to line')
|
||||
|
||||
# # TODO: we should be diffing the amount of new data which
|
||||
# # needs to be downsampled. Ideally we actually are just
|
||||
# # doing all the ds-ing in sibling actors so that the data
|
||||
# # can just be read and rendered to graphics on events of our
|
||||
# # choice.
|
||||
# # diff = do_diff(ohlc, new_bit)
|
||||
# curve = self._ds_line
|
||||
# curve.update_from_array(
|
||||
# x=x,
|
||||
# y=y,
|
||||
# x_iv=x_iv,
|
||||
# y_iv=y_iv,
|
||||
# view_range=None, # hack
|
||||
# profiler=profiler,
|
||||
# )
|
||||
# profiler('updated ds line')
|
||||
|
||||
# if not self._in_ds:
|
||||
# # hide bars and show line
|
||||
# self.hide()
|
||||
# # XXX: is this actually any faster?
|
||||
# # self._pi.removeItem(self)
|
||||
|
||||
# # TODO: a `.ui()` log level?
|
||||
# log.info(
|
||||
# f'downsampling to line graphic {self._name}'
|
||||
# )
|
||||
|
||||
# # self._pi.addItem(curve)
|
||||
# curve.show()
|
||||
# curve.update()
|
||||
# self._in_ds = True
|
||||
|
||||
# # stop here since we don't need to update bars path any more
|
||||
# # as we delegate to the downsample line with updates.
|
||||
|
||||
# else:
|
||||
# # we should be in bars mode
|
||||
|
||||
# if self._in_ds:
|
||||
# # flip back to bars graphics and hide the downsample line.
|
||||
# log.info(f'showing bars graphic {self._name}')
|
||||
|
||||
# curve = self._ds_line
|
||||
# curve.hide()
|
||||
# # self._pi.removeItem(curve)
|
||||
|
||||
# # XXX: is this actually any faster?
|
||||
# # self._pi.addItem(self)
|
||||
# self.show()
|
||||
# self._in_ds = False
|
||||
|
||||
# # generate in_view path
|
||||
# self.path = gen_qpath(
|
||||
# ohlc_iv,
|
||||
# 0,
|
||||
# self.w,
|
||||
# # path=self.path,
|
||||
# )
|
||||
|
||||
# # TODO: to make the downsampling faster
|
||||
# # - allow mapping only a range of lines thus only drawing as
|
||||
# # many bars as exactly specified.
|
||||
# # - move ohlc "flattening" to a shmarr
|
||||
# # - maybe move all this embedded logic to a higher
|
||||
# # level type?
|
||||
|
||||
# # if prepend_length:
|
||||
# # # new history was added and we need to render a new path
|
||||
# # prepend_bars = ohlc[:prepend_length]
|
||||
|
||||
# # if ds_prepend_length:
|
||||
# # ds_prepend_bars = ohlc[:ds_prepend_length]
|
||||
# # pre_x, pre_y = ohlc_flatten(ds_prepend_bars)
|
||||
# # fx = np.concatenate((pre_x, fx))
|
||||
# # fy = np.concatenate((pre_y, fy))
|
||||
# # profiler('ds line prepend diff complete')
|
||||
|
||||
# # if append_length:
|
||||
# # # generate new graphics to match provided array
|
||||
# # # path appending logic:
|
||||
# # # we need to get the previous "current bar(s)" for the time step
|
||||
# # # and convert it to a sub-path to append to the historical set
|
||||
# # # new_bars = ohlc[istop - 1:istop + append_length - 1]
|
||||
# # append_bars = ohlc[-append_length - 1:-1]
|
||||
# # # print(f'ohlc bars to append size: {append_bars.size}\n')
|
||||
|
||||
# # if ds_append_length:
|
||||
# # ds_append_bars = ohlc[-ds_append_length - 1:-1]
|
||||
# # post_x, post_y = ohlc_flatten(ds_append_bars)
|
||||
# # print(
|
||||
# # f'ds curve to append sizes: {(post_x.size, post_y.size)}'
|
||||
# # )
|
||||
# # fx = np.concatenate((fx, post_x))
|
||||
# # fy = np.concatenate((fy, post_y))
|
||||
|
||||
# # profiler('ds line append diff complete')
|
||||
|
||||
# profiler('array diffs complete')
|
||||
|
||||
# # does this work?
|
||||
# last = ohlc[-1]
|
||||
# # fy[-1] = last['close']
|
||||
|
||||
# # # incremental update and cache line datums
|
||||
# # self._ds_line_xy = fx, fy
|
||||
|
||||
# # maybe downsample to line
|
||||
# # ds = self.maybe_downsample()
|
||||
# # if ds:
|
||||
# # # if we downsample to a line don't bother with
|
||||
# # # any more path generation / updates
|
||||
# # self._ds_xrange = first_index, last_index
|
||||
# # profiler('downsampled to line')
|
||||
# # return
|
||||
|
||||
# # print(in_view.size)
|
||||
|
||||
# # if self.path:
|
||||
# # self.path = path
|
||||
# # self.path.reserve(path.capacity())
|
||||
# # self.path.swap(path)
|
||||
|
||||
# # path updates
|
||||
# # if prepend_length:
|
||||
# # # XXX: SOMETHING IS MAYBE FISHY HERE what with the old_path
|
||||
# # # y value not matching the first value from
|
||||
# # # ohlc[prepend_length + 1] ???
|
||||
# # prepend_path = gen_qpath(prepend_bars, 0, self.w)
|
||||
# # old_path = self.path
|
||||
# # self.path = prepend_path
|
||||
# # self.path.addPath(old_path)
|
||||
# # profiler('path PREPEND')
|
||||
|
||||
# # if append_length:
|
||||
# # append_path = gen_qpath(append_bars, 0, self.w)
|
||||
|
||||
# # self.path.moveTo(
|
||||
# # float(istop - self.w),
|
||||
# # float(append_bars[0]['open'])
|
||||
# # )
|
||||
# # self.path.addPath(append_path)
|
||||
|
||||
# # profiler('path APPEND')
|
||||
# # fp = self.fast_path
|
||||
# # if fp is None:
|
||||
# # self.fast_path = append_path
|
||||
|
||||
# # else:
|
||||
# # fp.moveTo(
|
||||
# # float(istop - self.w), float(new_bars[0]['open'])
|
||||
# # )
|
||||
# # fp.addPath(append_path)
|
||||
|
||||
# # self.setCacheMode(QtWidgets.QGraphicsItem.NoCache)
|
||||
# # flip_cache = True
|
||||
|
||||
# self._xrange = first_index, last_index
|
||||
|
||||
# # trigger redraw despite caching
|
||||
# self.prepareGeometryChange()
|
||||
|
||||
# self.draw_last(last)
|
||||
|
||||
# # # generate new lines objects for updatable "current bar"
|
||||
# # self._last_bar_lines = bar_from_ohlc_row(last, self.w)
|
||||
|
||||
# # # last bar update
|
||||
# # i, o, h, l, last, v = last[
|
||||
# # ['index', 'open', 'high', 'low', 'close', 'volume']
|
||||
# # ]
|
||||
# # # assert i == self.start_index - 1
|
||||
# # # assert i == last_index
|
||||
# # body, larm, rarm = self._last_bar_lines
|
||||
|
||||
# # # XXX: is there a faster way to modify this?
|
||||
# # rarm.setLine(rarm.x1(), last, rarm.x2(), last)
|
||||
|
||||
# # # writer is responsible for changing open on "first" volume of bar
|
||||
# # larm.setLine(larm.x1(), o, larm.x2(), o)
|
||||
|
||||
# # if l != h: # noqa
|
||||
|
||||
# # if body is None:
|
||||
# # body = self._last_bar_lines[0] = QLineF(i, l, i, h)
|
||||
# # else:
|
||||
# # # update body
|
||||
# # body.setLine(i, l, i, h)
|
||||
|
||||
# # # XXX: pretty sure this is causing an issue where the bar has
|
||||
# # # a large upward move right before the next sample and the body
|
||||
# # # is getting set to None since the next bar is flat but the shm
|
||||
# # # array index update wasn't read by the time this code runs. Iow
|
||||
# # # we're doing this removal of the body for a bar index that is
|
||||
# # # now out of date / from some previous sample. It's weird
|
||||
# # # though because i've seen it do this to bars i - 3 back?
|
||||
|
||||
# profiler('last bar set')
|
||||
|
||||
# self.update()
|
||||
# profiler('.update()')
|
||||
|
||||
# if flip_cache:
|
||||
# self.setCacheMode(QtWidgets.QGraphicsItem.DeviceCoordinateCache)
|
||||
|
||||
# # profiler.finish()
|
||||
|
||||
def draw_last(
|
||||
self,
|
||||
last: np.ndarray,
|
||||
|
|
|
|||
Loading…
Reference in New Issue