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Code Issues 5 Pull Requests 7 Packages Projects Releases Wiki Activity

Expect `index_field: str` in all graphics objects

epoch_indexing_and_dataviz_layer
Tyler Goodlet 2022-11-30 10:06:20 -05:00
parent 344d2eeb9e
commit ac1f37a2c2
3 changed files with 30 additions and 25 deletions
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11
piker/data/_compression.py
View File

@ -35,13 +35,17 @@ from ..log import get_logger
log = get_logger(__name__) log = get_logger(__name__)
def hl2mxmn(ohlc: np.ndarray) -> np.ndarray: def hl2mxmn(
ohlc: np.ndarray,
index_field: str = 'index',
) -> np.ndarray:
''' '''
Convert a OHLC struct-array containing 'high'/'low' columns Convert a OHLC struct-array containing 'high'/'low' columns
to a "joined" max/min 1-d array. to a "joined" max/min 1-d array.
''' '''
index = ohlc['index'] index = ohlc[index_field]
hls = ohlc[[ hls = ohlc[[
'low', 'low',
'high', 'high',
@ -109,6 +113,7 @@ def trace_hl(
def ohlc_flatten( def ohlc_flatten(
ohlc: np.ndarray, ohlc: np.ndarray,
use_mxmn: bool = True, use_mxmn: bool = True,
index_field: str = 'index',
) -> tuple[np.ndarray, np.ndarray]: ) -> tuple[np.ndarray, np.ndarray]:
''' '''
@ -117,7 +122,7 @@ def ohlc_flatten(
evenly (by 0.5 steps) over each index. evenly (by 0.5 steps) over each index.
''' '''
index = ohlc['index'] index = ohlc[index_field]
if use_mxmn: if use_mxmn:
# traces a line optimally over highs to lows # traces a line optimally over highs to lows

15
piker/ui/_curve.py
View File

@ -360,11 +360,12 @@ class Curve(pg.GraphicsObject):
render_data: np.ndarray, render_data: np.ndarray,
reset: bool, reset: bool,
array_key: str, array_key: str,
index_field: str,
) -> None: ) -> None:
# default line draw last call # default line draw last call
# with self.reset_cache(): # with self.reset_cache():
x = render_data['index'] x = render_data[index_field]
y = render_data[array_key] y = render_data[array_key]
# draw the "current" step graphic segment so it # draw the "current" step graphic segment so it
@ -391,10 +392,11 @@ class FlattenedOHLC(Curve):
render_data: np.ndarray, render_data: np.ndarray,
reset: bool, reset: bool,
array_key: str, array_key: str,
index_field: str,
) -> None: ) -> None:
lasts = src_data[-2:] lasts = src_data[-2:]
x = lasts['index'] x = lasts[index_field]
y = lasts['close'] y = lasts['close']
# draw the "current" step graphic segment so it # draw the "current" step graphic segment so it
@ -421,6 +423,7 @@ class StepCurve(Curve):
render_data: np.ndarray, render_data: np.ndarray,
reset: bool, reset: bool,
array_key: str, array_key: str,
index_field: str,
w: float = 0.5, w: float = 0.5,
@ -429,7 +432,7 @@ class StepCurve(Curve):
# TODO: remove this and instead place all step curve # TODO: remove this and instead place all step curve
# updating into pre-path data render callbacks. # updating into pre-path data render callbacks.
# full input data # full input data
x = src_data['index'] x = src_data[index_field]
y = src_data[array_key] y = src_data[array_key]
x_last = x[-1] x_last = x[-1]
@ -458,9 +461,3 @@ class StepCurve(Curve):
# p.drawLines(*tuple(filter(bool, self._last_step_lines))) # p.drawLines(*tuple(filter(bool, self._last_step_lines)))
# p.drawRect(self._last_step_rect) # p.drawRect(self._last_step_rect)
p.fillRect(self._last_step_rect, self._brush) p.fillRect(self._last_step_rect, self._brush)
# def sub_br(
# self,
# parent_br: QRectF | None = None,
# ) -> QRectF:
# return self._last_step_rect

29
piker/ui/_ohlc.py
View File

@ -59,8 +59,8 @@ def bar_from_ohlc_row(
OHLC "bar" for use in the "last datum" of a series. OHLC "bar" for use in the "last datum" of a series.
''' '''
open, high, low, close, index = row[ open, high, low, close, index = row #[fields]
['open', 'high', 'low', 'close', 'index']] # ['open', 'high', 'low', 'close', 'index']]
# TODO: maybe consider using `QGraphicsLineItem` ?? # TODO: maybe consider using `QGraphicsLineItem` ??
# gives us a ``.boundingRect()`` on the objects which may make # gives us a ``.boundingRect()`` on the objects which may make
@ -217,30 +217,33 @@ class BarItems(pg.GraphicsObject):
render_data: np.ndarray, render_data: np.ndarray,
reset: bool, reset: bool,
array_key: str, array_key: str,
index_field: str,
fields: list[str] = [
'index',
'open',
'high',
'low',
'close',
],
) -> None: ) -> None:
# relevant fields # relevant fields
fields: list[str] = [
'open',
'high',
'low',
'close',
index_field,
]
ohlc = src_data[fields] ohlc = src_data[fields]
# last_row = ohlc[-1:] # last_row = ohlc[-1:]
# individual values # individual values
last_row = i, o, h, l, last = ohlc[-1] last_row = o, h, l, last, i = ohlc[-1]
# times = src_data['time'] # times = src_data['time']
# if times[-1] - times[-2]: # if times[-1] - times[-2]:
# breakpoint() # breakpoint()
# generate new lines objects for updatable "current bar" # generate new lines objects for updatable "current bar"
self._last_bar_lines = bar_from_ohlc_row(last_row) self._last_bar_lines = bar_from_ohlc_row(
last_row,
# fields,
)
# assert i == graphics.start_index - 1 # assert i == graphics.start_index - 1
# assert i == last_index # assert i == last_index
@ -270,4 +273,4 @@ class BarItems(pg.GraphicsObject):
# because i've seen it do this to bars i - 3 back? # because i've seen it do this to bars i - 3 back?
# return ohlc['time'], ohlc['close'] # return ohlc['time'], ohlc['close']
return ohlc['index'], ohlc['close'] return ohlc[index_field], ohlc['close']