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Merge pull request #302 from pikers/incremental_update_paths 

Incremental update paths
flexxin
goodboy 2022-06-06 10:39:58 -04:00 committed by GitHub
parent be7c4e70f0 44c242a794
commit f6b54f02c0
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
25 changed files with 2429 additions and 1621 deletions
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10
piker/brokers/kraken.py
View File

@ -21,6 +21,7 @@ Kraken backend.
from contextlib import asynccontextmanager as acm
from dataclasses import asdict, field
from datetime import datetime
from pprint import pformat
from typing import Any, Optional, AsyncIterator, Callable, Union
import time
@ -569,7 +570,10 @@ async def handle_order_requests(
order: BrokerdOrder
async for request_msg in ems_order_stream:
log.info(f'Received order request {request_msg}')
log.info(
'Received order request:\n'
f'{pformat(request_msg)}'
)
action = request_msg['action']
@ -628,6 +632,7 @@ async def handle_order_requests(
# update the internal pairing of oid to krakens
# txid with the new txid that is returned on edit
reqid = resp['result']['txid']
# deliver ack that order has been submitted to broker routing
await ems_order_stream.send(
BrokerdOrderAck(
@ -788,7 +793,10 @@ async def trades_dialogue(
# Get websocket token for authenticated data stream
# Assert that a token was actually received.
resp = await client.endpoint('GetWebSocketsToken', {})
# lol wtf is this..
assert resp['error'] == []
token = resp['result']['token']
async with (

28
piker/clearing/_ems.py
View File

@ -80,7 +80,9 @@ def mk_check(
return check_lt
raise ValueError('trigger: {trigger_price}, last: {known_last}')
raise ValueError(
f'trigger: {trigger_price}, last: {known_last}'
)
@dataclass
@ -561,7 +563,10 @@ async def translate_and_relay_brokerd_events(
name = brokerd_msg['name']
log.info(f'Received broker trade event:\n{pformat(brokerd_msg)}')
log.info(
f'Received broker trade event:\n'
f'{pformat(brokerd_msg)}'
)
if name == 'position':
@ -613,19 +618,28 @@ async def translate_and_relay_brokerd_events(
# packed at submission since we already know it ahead of
# time
paper = brokerd_msg['broker_details'].get('paper_info')
ext = brokerd_msg['broker_details'].get('external')
if paper:
# paperboi keeps the ems id up front
oid = paper['oid']
else:
elif ext:
# may be an order msg specified as "external" to the
# piker ems flow (i.e. generated by some other
# external broker backend client (like tws for ib)
ext = brokerd_msg['broker_details'].get('external')
if ext:
log.error(f"External trade event {ext}")
continue
else:
# something is out of order, we don't have an oid for
# this broker-side message.
log.error(
'Unknown oid:{oid} for msg:\n'
f'{pformat(brokerd_msg)}'
'Unable to relay message to client side!?'
)
else:
# check for existing live flow entry
entry = book._ems_entries.get(oid)
@ -823,7 +837,9 @@ async def process_client_order_cmds(
if reqid:
# send cancel to brokerd immediately!
log.info("Submitting cancel for live order {reqid}")
log.info(
f'Submitting cancel for live order {reqid}'
)
await brokerd_order_stream.send(msg.dict())

82
piker/config.py
View File

@ -1,5 +1,5 @@
# piker: trading gear for hackers
# Copyright (C) 2018-present Tyler Goodlet (in stewardship of piker0)
# Copyright (C) 2018-present Tyler Goodlet (in stewardship for pikers)
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
@ -16,6 +16,7 @@
"""
Broker configuration mgmt.
"""
import platform
import sys
@ -50,7 +51,7 @@ def get_app_dir(app_name, roaming=True, force_posix=False):
Unix (POSIX):
``~/.foo-bar``
Win XP (roaming):
``C:\Documents and Settings\<user>\Local Settings\Application Data\Foo Bar``
``C:\Documents and Settings\<user>\Local Settings\Application Data\Foo``
Win XP (not roaming):
``C:\Documents and Settings\<user>\Application Data\Foo Bar``
Win 7 (roaming):
@ -81,7 +82,8 @@ def get_app_dir(app_name, roaming=True, force_posix=False):
folder = os.path.expanduser("~")
return os.path.join(folder, app_name)
if force_posix:
return os.path.join(os.path.expanduser("~/.{}".format(_posixify(app_name))))
return os.path.join(
os.path.expanduser("~/.{}".format(_posixify(app_name))))
if sys.platform == "darwin":
return os.path.join(
os.path.expanduser("~/Library/Application Support"), app_name
@ -107,7 +109,12 @@ if _parent_user:
]
)
_file_name = 'brokers.toml'
_conf_names: set[str] = {
'brokers',
'trades',
'watchlists',
}
_watchlists_data_path = os.path.join(_config_dir, 'watchlists.json')
_context_defaults = dict(
default_map={
@ -129,23 +136,43 @@ def _override_config_dir(
_config_dir = path
def get_broker_conf_path():
def _conf_fn_w_ext(
name: str,
) -> str:
# change this if we ever change the config file format.
return f'{name}.toml'
def get_conf_path(
conf_name: str = 'brokers',
) -> str:
"""Return the default config path normally under
``~/.config/piker`` on linux.
Contains files such as:
- brokers.toml
- watchlists.toml
- trades.toml
# maybe coming soon ;)
- signals.toml
- strats.toml
"""
return os.path.join(_config_dir, _file_name)
assert conf_name in _conf_names
fn = _conf_fn_w_ext(conf_name)
return os.path.join(
_config_dir,
fn,
)
def repodir():
"""Return the abspath to the repo directory.
"""
'''
Return the abspath to the repo directory.
'''
dirpath = os.path.abspath(
# we're 3 levels down in **this** module file
dirname(dirname(os.path.realpath(__file__)))
@ -154,16 +181,27 @@ def repodir():
def load(
conf_name: str = 'brokers',
path: str = None
) -> (dict, str):
"""Load broker config.
"""
path = path or get_broker_conf_path()
'''
Load config file by name.
'''
path = path or get_conf_path(conf_name)
if not os.path.isfile(path):
shutil.copyfile(
os.path.join(repodir(), 'config', 'brokers.toml'),
path,
fn = _conf_fn_w_ext(conf_name)
template = os.path.join(
repodir(),
'config',
fn
)
# try to copy in a template config to the user's directory
# if one exists.
if os.path.isfile(template):
shutil.copyfile(template, path)
config = toml.load(path)
log.debug(f"Read config file {path}")
@ -172,13 +210,17 @@ def load(
def write(
config: dict, # toml config as dict
name: str = 'brokers',
path: str = None,
) -> None:
"""Write broker config to disk.
''''
Write broker config to disk.
Create a ``brokers.ini`` file if one does not exist.
"""
path = path or get_broker_conf_path()
'''
path = path or get_conf_path(name)
dirname = os.path.dirname(path)
if not os.path.isdir(dirname):
log.debug(f"Creating config dir {_config_dir}")
@ -188,7 +230,10 @@ def write(
raise ValueError(
"Watch out you're trying to write a blank config!")
log.debug(f"Writing config file {path}")
log.debug(
f"Writing config `{name}` file to:\n"
f"{path}"
)
with open(path, 'w') as cf:
return toml.dump(config, cf)
@ -218,4 +263,5 @@ def load_accounts(
# our default paper engine entry
accounts['paper'] = None
return accounts

2
piker/data/_ahab.py
View File

@ -98,8 +98,6 @@ async def open_docker(
finally:
if client:
client.close()
for c in client.containers.list():
c.kill()
class Container:

77
piker/data/_sampling.py
View File

@ -22,7 +22,7 @@ financial data flows.
from __future__ import annotations
from collections import Counter
import time
from typing import TYPE_CHECKING, Optional
from typing import TYPE_CHECKING, Optional, Union
import tractor
import trio
@ -32,6 +32,7 @@ from ..log import get_logger
if TYPE_CHECKING:
from ._sharedmem import ShmArray
from .feed import _FeedsBus
log = get_logger(__name__)
@ -142,11 +143,17 @@ async def broadcast(
shm: Optional[ShmArray] = None,
) -> None:
# broadcast the buffer index step to any subscribers for
# a given sample period.
'''
Broadcast the given ``shm: ShmArray``'s buffer index step to any
subscribers for a given sample period.
The sent msg will include the first and last index which slice into
the buffer's non-empty data.
'''
subs = sampler.subscribers.get(delay_s, ())
last = -1
first = last = -1
if shm is None:
periods = sampler.ohlcv_shms.keys()
@ -156,11 +163,16 @@ async def broadcast(
if periods:
lowest = min(periods)
shm = sampler.ohlcv_shms[lowest][0]
first = shm._first.value
last = shm._last.value
for stream in subs:
try:
await stream.send({'index': last})
await stream.send({
'first': first,
'last': last,
'index': last,
})
except (
trio.BrokenResourceError,
trio.ClosedResourceError
@ -168,7 +180,12 @@ async def broadcast(
log.error(
f'{stream._ctx.chan.uid} dropped connection'
)
try:
subs.remove(stream)
except ValueError:
log.warning(
f'{stream._ctx.chan.uid} sub already removed!?'
)
@tractor.context
@ -203,7 +220,7 @@ async def iter_ohlc_periods(
async def sample_and_broadcast(
bus: '_FeedsBus', # noqa
bus: _FeedsBus, # noqa
shm: ShmArray,
quote_stream: trio.abc.ReceiveChannel,
brokername: str,
@ -282,7 +299,13 @@ async def sample_and_broadcast(
# end up triggering backpressure which which will
# eventually block this producer end of the feed and
# thus other consumers still attached.
subs = bus._subscribers[broker_symbol.lower()]
subs: list[
tuple[
Union[tractor.MsgStream, trio.MemorySendChannel],
tractor.Context,
Optional[float], # tick throttle in Hz
]
] = bus._subscribers[broker_symbol.lower()]
# NOTE: by default the broker backend doesn't append
# it's own "name" into the fqsn schema (but maybe it
@ -291,7 +314,7 @@ async def sample_and_broadcast(
bsym = f'{broker_symbol}.{brokername}'
lags: int = 0
for (stream, tick_throttle) in subs:
for (stream, ctx, tick_throttle) in subs:
try:
with trio.move_on_after(0.2) as cs:
@ -303,25 +326,41 @@ async def sample_and_broadcast(
(bsym, quote)
)
except trio.WouldBlock:
ctx = getattr(stream, '_ctx', None)
chan = ctx.chan
if ctx:
log.warning(
f'Feed overrun {bus.brokername} ->'
f'{ctx.channel.uid} !!!'
f'{chan.uid} !!!'
)
else:
key = id(stream)
overruns[key] += 1
log.warning(
f'Feed overrun {bus.brokername} -> '
f'Feed overrun {broker_symbol}'
'@{bus.brokername} -> '
f'feed @ {tick_throttle} Hz'
)
if overruns[key] > 6:
# TODO: should we check for the
# context being cancelled? this
# could happen but the
# channel-ipc-pipe is still up.
if not chan.connected():
log.warning(
f'Dropping consumer {stream}'
'Dropping broken consumer:\n'
f'{broker_symbol}:'
f'{ctx.cid}@{chan.uid}'
)
await stream.aclose()
raise trio.BrokenResourceError
else:
log.warning(
'Feed getting overrun bro!\n'
f'{broker_symbol}:'
f'{ctx.cid}@{chan.uid}'
)
continue
else:
await stream.send(
{bsym: quote}
@ -337,11 +376,12 @@ async def sample_and_broadcast(
trio.ClosedResourceError,
trio.EndOfChannel,
):
ctx = getattr(stream, '_ctx', None)
chan = ctx.chan
if ctx:
log.warning(
f'{ctx.chan.uid} dropped '
'`brokerd`-quotes-feed connection'
'Dropped `brokerd`-quotes-feed connection:\n'
f'{broker_symbol}:'
f'{ctx.cid}@{chan.uid}'
)
if tick_throttle:
assert stream._closed
@ -354,7 +394,11 @@ async def sample_and_broadcast(
try:
subs.remove((stream, tick_throttle))
except ValueError:
log.error(f'{stream} was already removed from subs!?')
log.error(
f'Stream was already removed from subs!?\n'
f'{broker_symbol}:'
f'{ctx.cid}@{chan.uid}'
)
# TODO: a less naive throttler, here's some snippets:
@ -466,6 +510,7 @@ async def uniform_rate_send(
# if the feed consumer goes down then drop
# out of this rate limiter
log.warning(f'{stream} closed')
await stream.aclose()
return
# reset send cycle state

28
piker/data/_sharedmem.py
View File

@ -20,6 +20,7 @@ NumPy compatible shared memory buffers for real-time IPC streaming.
"""
from __future__ import annotations
from sys import byteorder
import time
from typing import Optional
from multiprocessing.shared_memory import SharedMemory, _USE_POSIX
@ -98,7 +99,12 @@ class SharedInt:
if _USE_POSIX:
# We manually unlink to bypass all the "resource tracker"
# nonsense meant for non-SC systems.
shm_unlink(self._shm.name)
name = self._shm.name
try:
shm_unlink(name)
except FileNotFoundError:
# might be a teardown race here?
log.warning(f'Shm for {name} already unlinked?')
class _Token(BaseModel):
@ -536,8 +542,26 @@ def attach_shm_array(
if key in _known_tokens:
assert _Token.from_msg(_known_tokens[key]) == token, "WTF"
# XXX: ugh, looks like due to the ``shm_open()`` C api we can't
# actually place files in a subdir, see discussion here:
# https://stackoverflow.com/a/11103289
# attach to array buffer and view as per dtype
shm = SharedMemory(name=key)
_err: Optional[Exception] = None
for _ in range(3):
try:
shm = SharedMemory(
name=key,
create=False,
)
break
except OSError as oserr:
_err = oserr
time.sleep(0.1)
else:
if _err:
raise _err
shmarr = np.ndarray(
(size,),
dtype=token.dtype,

2
piker/data/_source.py
View File

@ -33,7 +33,7 @@ ohlc_fields = [
('high', float),
('low', float),
('close', float),
('volume', int),
('volume', float),
('bar_wap', float),
]

66
piker/data/feed.py
View File

@ -33,6 +33,7 @@ from typing import (
Generator,
Awaitable,
TYPE_CHECKING,
Union,
)
import trio
@ -40,12 +41,12 @@ from trio.abc import ReceiveChannel
from trio_typing import TaskStatus
import trimeter
import tractor
from tractor.trionics import maybe_open_context
from pydantic import BaseModel
import pendulum
import numpy as np
from ..brokers import get_brokermod
from .._cacheables import maybe_open_context
from ..calc import humanize
from ..log import get_logger, get_console_log
from .._daemon import (
@ -116,7 +117,13 @@ class _FeedsBus(BaseModel):
# https://github.com/samuelcolvin/pydantic/issues/2816
_subscribers: dict[
str,
list[tuple[tractor.MsgStream, Optional[float]]]
list[
tuple[
Union[tractor.MsgStream, trio.MemorySendChannel],
tractor.Context,
Optional[float], # tick throttle in Hz
]
]
] = {}
async def start_task(
@ -228,7 +235,7 @@ def diff_history(
# the + 1 is because ``last_tsdb_dt`` is pulled from
# the last row entry for the ``'time'`` field retreived
# from the tsdb.
to_push = array[abs(s_diff)+1:]
to_push = array[abs(s_diff) + 1:]
else:
# pass back only the portion of the array that is
@ -251,6 +258,7 @@ async def start_backfill(
last_tsdb_dt: Optional[datetime] = None,
storage: Optional[Storage] = None,
write_tsdb: bool = True,
tsdb_is_up: bool = False,
task_status: TaskStatus[trio.CancelScope] = trio.TASK_STATUS_IGNORED,
@ -266,8 +274,8 @@ async def start_backfill(
# sample period step size in seconds
step_size_s = (
pendulum.from_timestamp(times[-1]) -
pendulum.from_timestamp(times[-2])
pendulum.from_timestamp(times[-1])
- pendulum.from_timestamp(times[-2])
).seconds
# "frame"'s worth of sample period steps in seconds
@ -292,25 +300,33 @@ async def start_backfill(
# let caller unblock and deliver latest history frame
task_status.started((shm, start_dt, end_dt, bf_done))
# based on the sample step size, maybe load a certain amount history
if last_tsdb_dt is None:
# maybe a better default (they don't seem to define epoch?!)
# based on the sample step size load a certain amount
# history
if step_size_s == 1:
last_tsdb_dt = pendulum.now().subtract(days=2)
elif step_size_s == 60:
last_tsdb_dt = pendulum.now().subtract(years=2)
else:
if step_size_s not in (1, 60):
raise ValueError(
'`piker` only needs to support 1m and 1s sampling '
'but ur api is trying to deliver a longer '
f'timeframe of {step_size_s} ' 'seconds.. so ye, dun '
'do dat bruh.'
'do dat brudder.'
)
# when no tsdb "last datum" is provided, we just load
# some near-term history.
periods = {
1: {'days': 1},
60: {'days': 14},
}
if tsdb_is_up:
# do a decently sized backfill and load it into storage.
periods = {
1: {'days': 6},
60: {'years': 2},
}
kwargs = periods[step_size_s]
last_tsdb_dt = start_dt.subtract(**kwargs)
# configure async query throttling
erlangs = config.get('erlangs', 1)
rate = config.get('rate', 1)
@ -328,7 +344,7 @@ async def start_backfill(
log.debug(f'New datetime index:\n{pformat(dtrange)}')
for end_dt in dtrange:
log.warning(f'Yielding next frame start {end_dt}')
log.info(f'Yielding next frame start {end_dt}')
start = yield end_dt
# if caller sends a new start date, reset to that
@ -712,6 +728,7 @@ async def manage_history(
bfqsn,
shm,
last_tsdb_dt=last_tsdb_dt,
tsdb_is_up=True,
storage=storage,
)
)
@ -795,6 +812,15 @@ async def manage_history(
# manually trigger step update to update charts/fsps
# which need an incremental update.
# NOTE: the way this works is super duper
# un-intuitive right now:
# - the broadcaster fires a msg to the fsp subsystem.
# - fsp subsys then checks for a sample step diff and
# possibly recomputes prepended history.
# - the fsp then sends back to the parent actor
# (usually a chart showing graphics for said fsp)
# which tells the chart to conduct a manual full
# graphics loop cycle.
for delay_s in sampler.subscribers:
await broadcast(delay_s)
@ -1098,10 +1124,10 @@ async def open_feed_bus(
recv,
stream,
)
sub = (send, tick_throttle)
sub = (send, ctx, tick_throttle)
else:
sub = (stream, tick_throttle)
sub = (stream, ctx, tick_throttle)
subs = bus._subscribers[bfqsn]
subs.append(sub)

24
piker/data/marketstore.py
View File

@ -230,8 +230,8 @@ _ohlcv_dt = [
# ohlcv sampling
('Open', 'f4'),
('High', 'f4'),
('Low', 'i8'),
('Close', 'i8'),
('Low', 'f4'),
('Close', 'f4'),
('Volume', 'f4'),
]
@ -547,6 +547,17 @@ class Storage:
if err:
raise MarketStoreError(err)
# XXX: currently the only way to do this is through the CLI:
# sudo ./marketstore connect --dir ~/.config/piker/data
# >> \show mnq.globex.20220617.ib/1Sec/OHLCV 2022-05-15
# and this seems to block and use up mem..
# >> \trim mnq.globex.20220617.ib/1Sec/OHLCV 2022-05-15
# relevant source code for this is here:
# https://github.com/alpacahq/marketstore/blob/master/cmd/connect/session/trim.go#L14
# def delete_range(self, start_dt, end_dt) -> None:
# ...
@acm
async def open_storage_client(
@ -628,12 +639,13 @@ async def tsdb_history_update(
tsdb_arrays = await storage.read_ohlcv(fqsn)
# hist diffing
if tsdb_arrays:
onesec = tsdb_arrays[1]
for secs in (1, 60):
ts = tsdb_arrays.get(secs)
if ts is not None and len(ts):
# these aren't currently used but can be referenced from
# within the embedded ipython shell below.
to_append = ohlcv[ohlcv['time'] > onesec['Epoch'][-1]]
to_prepend = ohlcv[ohlcv['time'] < onesec['Epoch'][0]]
to_append = ohlcv[ohlcv['time'] > ts['Epoch'][-1]]
to_prepend = ohlcv[ohlcv['time'] < ts['Epoch'][0]]
profiler('Finished db arrays diffs')

7
piker/fsp/_engine.py
View File

@ -369,7 +369,12 @@ async def cascade(
# always trigger UI refresh after history update,
# see ``piker.ui._fsp.FspAdmin.open_chain()`` and
# ``piker.ui._display.trigger_update()``.
await client_stream.send('update')
await client_stream.send({
'fsp_update': {
'key': dst_shm_token,
'first': dst._first.value,
'last': dst._last.value,
}})
return tracker, index
def is_synced(

7
piker/log.py
View File

@ -25,10 +25,13 @@ from pygments import highlight, lexers, formatters
# Makes it so we only see the full module name when using ``__name__``
# without the extra "piker." prefix.
_proj_name = 'piker'
_proj_name: str = 'piker'
def get_logger(name: str = None) -> logging.Logger:
def get_logger(
name: str = None,
) -> logging.Logger:
'''Return the package log or a sub-log for `name` if provided.
'''
return tractor.log.get_logger(name=name, _root_name=_proj_name)

5
piker/ui/_axes.py
View File

@ -223,8 +223,9 @@ class DynamicDateAxis(Axis):
) -> list[str]:
chart = self.linkedsplits.chart
bars = chart._arrays[chart.name]
shm = self.linkedsplits.chart._shm
flow = chart._flows[chart.name]
shm = flow.shm
bars = shm.array
first = shm._first.value
bars_len = len(bars)

319
piker/ui/_chart.py
View File

@ -34,9 +34,7 @@ from PyQt5.QtWidgets import (
QVBoxLayout,
QSplitter,
)
import msgspec
import numpy as np
# from pydantic import BaseModel
import pyqtgraph as pg
import trio
@ -49,9 +47,13 @@ from ._cursor import (
Cursor,
ContentsLabel,
)
from ..data._sharedmem import ShmArray
from ._l1 import L1Labels
from ._ohlc import BarItems
from ._curve import FastAppendCurve
from ._curve import (
Curve,
StepCurve,
)
from ._style import (
hcolor,
CHART_MARGINS,
@ -60,15 +62,12 @@ from ._style import (
)
from ..data.feed import Feed
from ..data._source import Symbol
from ..data._sharedmem import (
ShmArray,
# _Token,
)
from ..log import get_logger
from ._interaction import ChartView
from ._forms import FieldsForm
from .._profile import pg_profile_enabled, ms_slower_then
from ._overlay import PlotItemOverlay
from ._flows import Flow
if TYPE_CHECKING:
from ._display import DisplayState
@ -419,7 +418,7 @@ class LinkedSplits(QWidget):
self,
symbol: Symbol,
array: np.ndarray,
shm: ShmArray,
sidepane: FieldsForm,
style: str = 'bar',
@ -444,7 +443,7 @@ class LinkedSplits(QWidget):
self.chart = self.add_plot(
name=symbol.key,
array=array,
shm=shm,
style=style,
_is_main=True,
@ -472,7 +471,7 @@ class LinkedSplits(QWidget):
self,
name: str,
array: np.ndarray,
shm: ShmArray,
array_key: Optional[str] = None,
style: str = 'line',
@ -516,7 +515,6 @@ class LinkedSplits(QWidget):
name=name,
data_key=array_key or name,
array=array,
parent=qframe,
linkedsplits=self,
axisItems=axes,
@ -580,7 +578,7 @@ class LinkedSplits(QWidget):
graphics, data_key = cpw.draw_ohlc(
name,
array,
shm,
array_key=array_key
)
self.cursor.contents_labels.add_label(
@ -594,7 +592,7 @@ class LinkedSplits(QWidget):
add_label = True
graphics, data_key = cpw.draw_curve(
name,
array,
shm,
array_key=array_key,
color='default_light',
)
@ -603,7 +601,7 @@ class LinkedSplits(QWidget):
add_label = True
graphics, data_key = cpw.draw_curve(
name,
array,
shm,
array_key=array_key,
step_mode=True,
color='davies',
@ -691,7 +689,6 @@ class ChartPlotWidget(pg.PlotWidget):
# the "data view" we generate graphics from
name: str,
array: np.ndarray,
data_key: str,
linkedsplits: LinkedSplits,
@ -744,14 +741,6 @@ class ChartPlotWidget(pg.PlotWidget):
self._max_l1_line_len: float = 0
# self.setViewportMargins(0, 0, 0, 0)
# self._ohlc = array # readonly view of ohlc data
# TODO: move to Aggr above XD
# readonly view of data arrays
self._arrays = {
self.data_key: array,
}
self._graphics = {} # registry of underlying graphics
# registry of overlay curve names
self._flows: dict[str, Flow] = {}
@ -767,7 +756,6 @@ class ChartPlotWidget(pg.PlotWidget):
# show background grid
self.showGrid(x=False, y=True, alpha=0.3)
self.default_view()
self.cv.enable_auto_yrange()
self.pi_overlay: PlotItemOverlay = PlotItemOverlay(self.plotItem)
@ -816,14 +804,8 @@ class ChartPlotWidget(pg.PlotWidget):
Return a range tuple for the bars present in view.
'''
l, r = self.view_range()
array = self._arrays[self.name]
start, stop = self._xrange = (
array[0]['index'],
array[-1]['index'],
)
lbar = max(l, start)
rbar = min(r, stop)
main_flow = self._flows[self.name]
ifirst, l, lbar, rbar, r, ilast = main_flow.datums_range()
return l, lbar, rbar, r
def curve_width_pxs(
@ -877,40 +859,51 @@ class ChartPlotWidget(pg.PlotWidget):
def default_view(
self,
steps_on_screen: Optional[int] = None
bars_from_y: int = 3000,
) -> None:
'''
Set the view box to the "default" startup view of the scene.
'''
try:
index = self._arrays[self.name]['index']
except IndexError:
log.warning(f'array for {self.name} not loaded yet?')
flow = self._flows.get(self.name)
if not flow:
log.warning(f'`Flow` for {self.name} not loaded yet?')
return
index = flow.shm.array['index']
xfirst, xlast = index[0], index[-1]
l, lbar, rbar, r = self.bars_range()
marker_pos, l1_len = self.pre_l1_xs()
end = xlast + l1_len + 1
view = self.view
if (
rbar < 0
or l < xfirst
or l < 0
or (rbar - lbar) < 6
):
# set fixed bars count on screen that approx includes as
# TODO: set fixed bars count on screen that approx includes as
# many bars as possible before a downsample line is shown.
begin = xlast - round(6116 / 6)
begin = xlast - bars_from_y
view.setXRange(
min=begin,
max=xlast,
padding=0,
)
# re-get range
l, lbar, rbar, r = self.bars_range()
else:
# we get the L1 spread label "length" in view coords
# terms now that we've scaled either by user control
# or to the default set of bars as per the immediate block
# above.
marker_pos, l1_len = self.pre_l1_xs()
end = xlast + l1_len + 1
begin = end - (r - l)
# for debugging
# print(
# f'bars range: {brange}\n'
# # f'bars range: {brange}\n'
# f'xlast: {xlast}\n'
# f'marker pos: {marker_pos}\n'
# f'l1 len: {l1_len}\n'
@ -922,14 +915,13 @@ class ChartPlotWidget(pg.PlotWidget):
if self._static_yrange == 'axis':
self._static_yrange = None
view = self.view
view.setXRange(
min=begin,
max=end,
padding=0,
)
view._set_yrange()
self.view.maybe_downsample_graphics()
view._set_yrange()
try:
self.linked.graphics_cycle()
except IndexError:
@ -960,7 +952,7 @@ class ChartPlotWidget(pg.PlotWidget):
def draw_ohlc(
self,
name: str,
data: np.ndarray,
shm: ShmArray,
array_key: Optional[str] = None,
@ -980,15 +972,12 @@ class ChartPlotWidget(pg.PlotWidget):
# the np array buffer to be drawn on next render cycle
self.plotItem.addItem(graphics)
# draw after to allow self.scene() to work...
graphics.draw_from_data(data)
data_key = array_key or name
self._graphics[data_key] = graphics
self._flows[data_key] = Flow(
name=name,
plot=self.plotItem,
_shm=shm,
is_ohlc=True,
graphics=graphics,
)
@ -1058,20 +1047,21 @@ class ChartPlotWidget(pg.PlotWidget):
self,
name: str,
data: np.ndarray,
shm: ShmArray,
array_key: Optional[str] = None,
overlay: bool = False,
color: Optional[str] = None,
add_label: bool = True,
pi: Optional[pg.PlotItem] = None,
step_mode: bool = False,
**pdi_kwargs,
) -> (pg.PlotDataItem, str):
'''
Draw a "curve" (line plot graphics) for the provided data in
the input array ``data``.
the input shm array ``shm``.
'''
color = color or self.pen_color or 'default_light'
@ -1081,40 +1071,26 @@ class ChartPlotWidget(pg.PlotWidget):
data_key = array_key or name
# yah, we wrote our own B)
curve = FastAppendCurve(
y=data[data_key],
x=data['index'],
# antialias=True,
curve_type = {
None: Curve,
'step': StepCurve,
# TODO:
# 'bars': BarsItems
}['step' if step_mode else None]
curve = curve_type(
name=name,
# XXX: pretty sure this is just more overhead
# on data reads and makes graphics rendering no faster
# clipToView=True,
**pdi_kwargs,
)
# XXX: see explanation for different caching modes:
# https://stackoverflow.com/a/39410081
# seems to only be useful if we don't re-generate the entire
# QPainterPath every time
# curve.setCacheMode(QtWidgets.QGraphicsItem.DeviceCoordinateCache)
# don't ever use this - it's a colossal nightmare of artefacts
# and is disastrous for performance.
# curve.setCacheMode(QtWidgets.QGraphicsItem.ItemCoordinateCache)
# register curve graphics and backing array for name
self._graphics[name] = curve
self._arrays[data_key] = data
pi = pi or self.plotItem
self._flows[data_key] = Flow(
name=name,
plot=pi,
_shm=shm,
is_ohlc=False,
# register curve graphics with this flow
graphics=curve,
)
@ -1175,16 +1151,11 @@ class ChartPlotWidget(pg.PlotWidget):
)
return last
def update_graphics_from_array(
def update_graphics_from_flow(
self,
graphics_name: str,
array: Optional[np.ndarray] = None,
array_key: Optional[str] = None,
use_vr: bool = True,
render: bool = True,
**kwargs,
) -> pg.GraphicsObject:
@ -1192,64 +1163,12 @@ class ChartPlotWidget(pg.PlotWidget):
Update the named internal graphics from ``array``.
'''
if array is not None:
assert len(array)
data_key = array_key or graphics_name
if graphics_name not in self._flows:
data_key = self.name
if array is not None:
# write array to internal graphics table
self._arrays[data_key] = array
else:
array = self._arrays[data_key]
# array key and graphics "name" might be different..
graphics = self._graphics[graphics_name]
# compute "in-view" indices
l, lbar, rbar, r = self.bars_range()
indexes = array['index']
ifirst = indexes[0]
ilast = indexes[-1]
lbar_i = max(l, ifirst) - ifirst
rbar_i = min(r, ilast) - ifirst
# TODO: we could do it this way as well no?
# to_draw = array[lbar - ifirst:(rbar - ifirst) + 1]
in_view = array[lbar_i: rbar_i + 1]
if (
not in_view.size
or not render
):
return graphics
if isinstance(graphics, BarItems):
graphics.update_from_array(
array,
in_view,
view_range=(lbar_i, rbar_i) if use_vr else None,
flow = self._flows[array_key or graphics_name]
return flow.update_graphics(
array_key=array_key,
**kwargs,
)
else:
graphics.update_from_array(
x=array['index'],
y=array[data_key],
x_iv=in_view['index'],
y_iv=in_view[data_key],
view_range=(lbar_i, rbar_i) if use_vr else None,
**kwargs
)
return graphics
# def _label_h(self, yhigh: float, ylow: float) -> float:
# # compute contents label "height" in view terms
# # to avoid having data "contents" overlap with them
@ -1295,7 +1214,7 @@ class ChartPlotWidget(pg.PlotWidget):
# TODO: this should go onto some sort of
# data-view thinger..right?
ohlc = self._shm.array
ohlc = self._flows[self.name].shm.array
# XXX: not sure why the time is so off here
# looks like we're gonna have to do some fixing..
@ -1325,7 +1244,9 @@ class ChartPlotWidget(pg.PlotWidget):
def maxmin(
self,
name: Optional[str] = None,
bars_range: Optional[tuple[int, int, int, int]] = None,
bars_range: Optional[tuple[
int, int, int, int, int, int
]] = None,
) -> tuple[float, float]:
'''
@ -1334,16 +1255,14 @@ class ChartPlotWidget(pg.PlotWidget):
If ``bars_range`` is provided use that range.
'''
# print(f'Chart[{self.name}].maxmin()')
profiler = pg.debug.Profiler(
msg=f'`{str(self)}.maxmin()` loop cycle for: `{self.name}`',
msg=f'`{str(self)}.maxmin(name={name})`: `{self.name}`',
disabled=not pg_profile_enabled(),
gt=ms_slower_then,
ms_threshold=ms_slower_then,
delayed=True,
)
l, lbar, rbar, r = bars_range or self.bars_range()
profiler(f'{self.name} got bars range')
# TODO: here we should instead look up the ``Flow.shm.array``
# and read directly from shm to avoid copying to memory first
# and then reading it again here.
@ -1353,112 +1272,26 @@ class ChartPlotWidget(pg.PlotWidget):
flow is None
):
log.error(f"flow {flow_key} doesn't exist in chart {self.name} !?")
res = 0, 0
key = res = 0, 0
else:
(
first,
l,
lbar,
rbar,
r,
last,
) = bars_range or flow.datums_range()
profiler(f'{self.name} got bars range')
key = round(lbar), round(rbar)
res = flow.maxmin(*key)
profiler(f'yrange mxmn: {key} -> {res}')
if res == (None, None):
log.error(
f"{flow_key} no mxmn for bars_range => {key} !?"
)
res = 0, 0
profiler(f'yrange mxmn: {key} -> {res}')
return res
# class FlowsTable(pydantic.BaseModel):
# '''
# Data-AGGRegate: high level API onto multiple (categorized)
# ``Flow``s with high level processing routines for
# multi-graphics computations and display.
# '''
# flows: dict[str, np.ndarray] = {}
class Flow(msgspec.Struct): # , frozen=True):
'''
(FinancialSignal-)Flow compound type which wraps a real-time
graphics (curve) and its backing data stream together for high level
access and control.
The intention is for this type to eventually be capable of shm-passing
of incrementally updated graphics stream data between actors.
'''
name: str
plot: pg.PlotItem
is_ohlc: bool = False
graphics: pg.GraphicsObject
# TODO: hackery to be able to set a shm later
# but whilst also allowing this type to hashable,
# likely will require serializable token that is used to attach
# to the underlying shm ref after startup?
_shm: Optional[ShmArray] = None # currently, may be filled in "later"
# cache of y-range values per x-range input.
_mxmns: dict[tuple[int, int], tuple[float, float]] = {}
@property
def shm(self) -> ShmArray:
return self._shm
@shm.setter
def shm(self, shm: ShmArray) -> ShmArray:
self._shm = shm
def maxmin(
self,
lbar,
rbar,
) -> tuple[float, float]:
'''
Compute the cached max and min y-range values for a given
x-range determined by ``lbar`` and ``rbar``.
'''
rkey = (lbar, rbar)
cached_result = self._mxmns.get(rkey)
if cached_result:
return cached_result
shm = self.shm
if shm is None:
mxmn = None
else: # new block for profiling?..
arr = shm.array
# build relative indexes into shm array
# TODO: should we just add/use a method
# on the shm to do this?
ifirst = arr[0]['index']
slice_view = arr[
lbar - ifirst:
(rbar - ifirst) + 1
]
if not slice_view.size:
mxmn = None
else:
if self.is_ohlc:
ylow = np.min(slice_view['low'])
yhigh = np.max(slice_view['high'])
else:
view = slice_view[self.name]
ylow = np.min(view)
yhigh = np.max(view)
mxmn = ylow, yhigh
if mxmn is not None:
# cache new mxmn result
self._mxmns[rkey] = mxmn
return mxmn

97
piker/ui/_compression.py
View File

@ -138,50 +138,20 @@ def ohlc_flatten(
return x, flat
def ohlc_to_m4_line(
ohlc: np.ndarray,
px_width: int,
downsample: bool = False,
uppx: Optional[float] = None,
pretrace: bool = False,
) -> tuple[np.ndarray, np.ndarray]:
'''
Convert an OHLC struct-array to a m4 downsampled 1-d array.
'''
xpts, flat = ohlc_flatten(
ohlc,
use_mxmn=pretrace,
)
if downsample:
bins, x, y = ds_m4(
xpts,
flat,
px_width=px_width,
uppx=uppx,
log_scale=bool(uppx)
)
x = np.broadcast_to(x[:, None], y.shape)
x = (x + np.array([-0.43, 0, 0, 0.43])).flatten()
y = y.flatten()
return x, y
else:
return xpts, flat
def ds_m4(
x: np.ndarray,
y: np.ndarray,
# units-per-pixel-x(dimension)
uppx: float,
# this is the width of the data in view
# in display-device-local pixel units.
px_width: int,
uppx: Optional[float] = None,
log_scale: bool = True,
# XXX: troll zone / easter egg..
# want to mess with ur pal, pass in the actual
# pixel width here instead of uppx-proper (i.e. pass
# in our ``pg.GraphicsObject`` derivative's ``.px_width()``
# gto mega-trip-out ur bud). Hint, it used to be implemented
# (wrongly) using "pixel width", so check the git history ;)
xrange: Optional[float] = None,
) -> tuple[int, np.ndarray, np.ndarray]:
'''
@ -208,52 +178,49 @@ def ds_m4(
# "i didn't show it in the sample code, but it's accounted for
# in the start and end indices and number of bins"
# optionally log-scale down the "supposed pxs on screen"
# as the units-per-px (uppx) get's large.
if log_scale:
assert uppx, 'You must provide a `uppx` value to use log scaling!'
# scaler = 2**7 / (1 + math.log(uppx, 2))
scaler = round(
max(
# NOTE: found that a 16x px width brought greater
# detail, likely due to dpi scaling?
# px_width=px_width * 16,
2**7 / (1 + math.log(uppx, 2)),
1
)
)
px_width *= scaler
assert px_width > 1 # width of screen in pxs?
# should never get called unless actually needed
assert uppx > 1
# NOTE: if we didn't pre-slice the data to downsample
# you could in theory pass these as the slicing params,
# do we care though since we can always just pre-slice the
# input?
x_start = x[0] # x value start/lowest in domain
if xrange is None:
x_end = x[-1] # x end value/highest in domain
xrange = (x_end - x_start)
# XXX: always round up on the input pixels
px_width = math.ceil(px_width)
# lnx = len(x)
# uppx *= max(4 / (1 + math.log(uppx, 2)), 1)
x_range = x_end - x_start
pxw = math.ceil(xrange / uppx)
# ratio of indexed x-value to width of raster in pixels.
# this is more or less, uppx: units-per-pixel.
w = x_range / float(px_width)
# scale up the frame "width" directly with uppx
w = uppx
# ensure we make more then enough
# frames (windows) for the output pixel
frames = px_width
frames = pxw
# if we have more and then exact integer's
# (uniform quotient output) worth of datum-domain-points
# per windows-frame, add one more window to ensure
# we have room for all output down-samples.
pts_per_pixel, r = divmod(len(x), frames)
pts_per_pixel, r = divmod(xrange, frames)
if r:
# while r:
frames += 1
pts_per_pixel, r = divmod(xrange, frames)
# print(
# f'uppx: {uppx}\n'
# f'xrange: {xrange}\n'
# f'pxw: {pxw}\n'
# f'frames: {frames}\n'
# )
assert frames >= (xrange / uppx)
# call into ``numba``
nb, i_win, y_out = _m4(

50
piker/ui/_cursor.py
View File

@ -43,8 +43,8 @@ log = get_logger(__name__)
# latency (in terms of perceived lag in cross hair) so really be sure
# there's an improvement if you want to change it!
_mouse_rate_limit = 120 # TODO; should we calc current screen refresh rate?
_debounce_delay = 1 / 40
_mouse_rate_limit = 60 # TODO; should we calc current screen refresh rate?
_debounce_delay = 0
_ch_label_opac = 1
@ -98,25 +98,30 @@ class LineDot(pg.CurvePoint):
ev: QtCore.QEvent,
) -> bool:
if not isinstance(
ev, QtCore.QDynamicPropertyChangeEvent
) or self.curve() is None:
if (
not isinstance(ev, QtCore.QDynamicPropertyChangeEvent)
or self.curve() is None
):
return False
# TODO: get rid of this ``.getData()`` and
# make a more pythonic api to retreive backing
# numpy arrays...
(x, y) = self.curve().getData()
index = self.property('index')
# first = self._plot._arrays['ohlc'][0]['index']
# first = x[0]
# i = index - first
if index:
i = round(index - x[0])
if i > 0 and i < len(y):
newPos = (index, y[i])
QtWidgets.QGraphicsItem.setPos(self, *newPos)
return True
# (x, y) = self.curve().getData()
# index = self.property('index')
# # first = self._plot._arrays['ohlc'][0]['index']
# # first = x[0]
# # i = index - first
# if index:
# i = round(index - x[0])
# if i > 0 and i < len(y):
# newPos = (index, y[i])
# QtWidgets.QGraphicsItem.setPos(
# self,
# *newPos,
# )
# return True
return False
@ -254,13 +259,13 @@ class ContentsLabels:
def update_labels(
self,
index: int,
# array_name: str,
) -> None:
# for name, (label, update) in self._labels.items():
for chart, name, label, update in self._labels:
array = chart._arrays[name]
flow = chart._flows[name]
array = flow.shm.array
if not (
index >= 0
and index < array[-1]['index']
@ -269,8 +274,6 @@ class ContentsLabels:
print('WTF out of range?')
continue
# array = chart._arrays[name]
# call provided update func with data point
try:
label.show()
@ -472,9 +475,12 @@ class Cursor(pg.GraphicsObject):
) -> LineDot:
# if this plot contains curves add line dot "cursors" to denote
# the current sample under the mouse
main_flow = plot._flows[plot.name]
# read out last index
i = main_flow.shm.array[-1]['index']
cursor = LineDot(
curve,
index=plot._arrays[plot.name][-1]['index'],
index=i,
plot=plot
)
plot.addItem(cursor)

719
piker/ui/_curve.py
View File

@ -18,83 +18,37 @@
Fast, smooth, sexy curves.
"""
from typing import Optional
from contextlib import contextmanager as cm
from typing import Optional, Callable
import numpy as np
import pyqtgraph as pg
from PyQt5 import QtGui, QtWidgets
from PyQt5 import QtWidgets
from PyQt5.QtWidgets import QGraphicsItem
from PyQt5.QtCore import (
Qt,
QLineF,
QSizeF,
QRectF,
# QRect,
QPointF,
)
from PyQt5.QtGui import (
QPainter,
QPainterPath,
)
from .._profile import pg_profile_enabled, ms_slower_then
from ._style import hcolor
from ._compression import (
# ohlc_to_m4_line,
ds_m4,
)
# from ._compression import (
# # ohlc_to_m4_line,
# ds_m4,
# )
from ..log import get_logger
log = get_logger(__name__)
def step_path_arrays_from_1d(
x: np.ndarray,
y: np.ndarray,
include_endpoints: bool = False,
) -> (np.ndarray, np.ndarray):
'''
Generate a "step mode" curve aligned with OHLC style bars
such that each segment spans each bar (aka "centered" style).
'''
y_out = y.copy()
x_out = x.copy()
x2 = np.empty(
# the data + 2 endpoints on either end for
# "termination of the path".
(len(x) + 1, 2),
# we want to align with OHLC or other sampling style
# bars likely so we need fractinal values
dtype=float,
)
x2[0] = x[0] - 0.5
x2[1] = x[0] + 0.5
x2[1:] = x[:, np.newaxis] + 0.5
# flatten to 1-d
x_out = x2.reshape(x2.size)
# we create a 1d with 2 extra indexes to
# hold the start and (current) end value for the steps
# on either end
y2 = np.empty((len(y), 2), dtype=y.dtype)
y2[:] = y[:, np.newaxis]
y_out = np.empty(
2*len(y) + 2,
dtype=y.dtype
)
# flatten and set 0 endpoints
y_out[1:-1] = y2.reshape(y2.size)
y_out[0] = 0
y_out[-1] = 0
if not include_endpoints:
return x_out[:-1], y_out[:-1]
else:
return x_out, y_out
_line_styles: dict[str, int] = {
'solid': Qt.PenStyle.SolidLine,
'dash': Qt.PenStyle.DashLine,
@ -103,24 +57,43 @@ _line_styles: dict[str, int] = {
}
class FastAppendCurve(pg.GraphicsObject):
class Curve(pg.GraphicsObject):
'''
A faster, append friendly version of ``pyqtgraph.PlotCurveItem``
built for real-time data updates.
A faster, simpler, append friendly version of
``pyqtgraph.PlotCurveItem`` built for highly customizable real-time
updates.
The main difference is avoiding regeneration of the entire
historical path where possible and instead only updating the "new"
segment(s) via a ``numpy`` array diff calc. Further the "last"
graphic segment is drawn independently such that near-term (high
frequency) discrete-time-sampled style updates don't trigger a full
path redraw.
This type is a much stripped down version of a ``pyqtgraph`` style
"graphics object" in the sense that the internal lower level
graphics which are drawn in the ``.paint()`` method are actually
rendered outside of this class entirely and instead are assigned as
state (instance vars) here and then drawn during a Qt graphics
cycle.
The main motivation for this more modular, composed design is that
lower level graphics data can be rendered in different threads and
then read and drawn in this main thread without having to worry
about dealing with Qt's concurrency primitives. See
``piker.ui._flows.Renderer`` for details and logic related to lower
level path generation and incremental update. The main differences in
the path generation code include:
- avoiding regeneration of the entire historical path where possible
and instead only updating the "new" segment(s) via a ``numpy``
array diff calc.
- here, the "last" graphics datum-segment is drawn independently
such that near-term (high frequency) discrete-time-sampled style
updates don't trigger a full path redraw.
'''
# sub-type customization methods
sub_br: Optional[Callable] = None
sub_paint: Optional[Callable] = None
declare_paintables: Optional[Callable] = None
def __init__(
self,
x: np.ndarray,
y: np.ndarray,
*args,
step_mode: bool = False,
@ -134,27 +107,25 @@ class FastAppendCurve(pg.GraphicsObject):
) -> None:
# brutaaalll, see comments within..
self._y = self.yData = y
self._x = self.xData = x
self._name = name
self.path: Optional[QtGui.QPainterPath] = None
# brutaaalll, see comments within..
self.yData = None
self.xData = None
# self._last_cap: int = 0
self.path: Optional[QPainterPath] = None
# additional path used for appends which tries to avoid
# triggering an update/redraw of the presumably larger
# historical ``.path`` above.
self.use_fpath = use_fpath
self.fast_path: Optional[QtGui.QPainterPath] = None
self.fast_path: Optional[QPainterPath] = None
# TODO: we can probably just dispense with the parent since
# we're basically only using the pen setting now...
super().__init__(*args, **kwargs)
# self._xrange: tuple[int, int] = self.dataBounds(ax=0)
self._xrange: Optional[tuple[int, int]] = None
# self._last_draw = time.time()
self._in_ds: bool = False
self._last_uppx: float = 0
# all history of curve is drawn in single px thickness
pen = pg.mkPen(hcolor(color))
pen.setStyle(_line_styles[style])
@ -168,29 +139,43 @@ class FastAppendCurve(pg.GraphicsObject):
# self.last_step_pen = pg.mkPen(hcolor(color), width=2)
self.last_step_pen = pg.mkPen(pen, width=2)
self._last_line: Optional[QLineF] = None
self._last_step_rect: Optional[QRectF] = None
# self._last_line: Optional[QLineF] = None
self._last_line = QLineF()
self._last_w: float = 1
# flat-top style histogram-like discrete curve
self._step_mode: bool = step_mode
# self._step_mode: bool = step_mode
# self._fill = True
self._brush = pg.functions.mkBrush(hcolor(fill_color or color))
# NOTE: this setting seems to mostly prevent redraws on mouse
# interaction which is a huge boon for avg interaction latency.
# TODO: one question still remaining is if this makes trasform
# interactions slower (such as zooming) and if so maybe if/when
# we implement a "history" mode for the view we disable this in
# that mode?
if step_mode:
# don't enable caching by default for the case where the
# only thing drawn is the "last" line segment which can
# have a weird artifact where it won't be fully drawn to its
# endpoint (something we saw on trade rate curves)
self.setCacheMode(
QGraphicsItem.DeviceCoordinateCache
)
self.setCacheMode(QGraphicsItem.DeviceCoordinateCache)
self.update()
# XXX: see explanation for different caching modes:
# https://stackoverflow.com/a/39410081
# seems to only be useful if we don't re-generate the entire
# QPainterPath every time
# curve.setCacheMode(QtWidgets.QGraphicsItem.DeviceCoordinateCache)
# don't ever use this - it's a colossal nightmare of artefacts
# and is disastrous for performance.
# curve.setCacheMode(QtWidgets.QGraphicsItem.ItemCoordinateCache)
# allow sub-type customization
declare = self.declare_paintables
if declare:
declare()
# TODO: probably stick this in a new parent
# type which will contain our own version of
@ -214,9 +199,6 @@ class FastAppendCurve(pg.GraphicsObject):
vr = self.viewRect()
l, r = int(vr.left()), int(vr.right())
if not self._xrange:
return 0
start, stop = self._xrange
lbar = max(l, start)
rbar = min(r, stop)
@ -225,352 +207,10 @@ class FastAppendCurve(pg.GraphicsObject):
QLineF(lbar, 0, rbar, 0)
).length()
def downsample(
self,
x,
y,
px_width,
uppx,
) -> tuple[np.ndarray, np.ndarray]:
# downsample whenever more then 1 pixels per datum can be shown.
# always refresh data bounds until we get diffing
# working properly, see above..
bins, x, y = ds_m4(
x,
y,
px_width=px_width,
uppx=uppx,
log_scale=bool(uppx)
)
x = np.broadcast_to(x[:, None], y.shape)
# x = (x + np.array([-0.43, 0, 0, 0.43])).flatten()
x = (x + np.array([-0.5, 0, 0, 0.5])).flatten()
y = y.flatten()
# presumably?
self._in_ds = True
return x, y
def update_from_array(
self,
# full array input history
x: np.ndarray,
y: np.ndarray,
# pre-sliced array data that's "in view"
x_iv: np.ndarray,
y_iv: np.ndarray,
view_range: Optional[tuple[int, int]] = None,
profiler: Optional[pg.debug.Profiler] = None,
) -> QtGui.QPainterPath:
'''
Update curve from input 2-d data.
Compare with a cached "x-range" state and (pre/a)ppend based on
a length diff.
'''
profiler = profiler or pg.debug.Profiler(
msg=f'FastAppendCurve.update_from_array(): `{self._name}`',
disabled=not pg_profile_enabled(),
gt=ms_slower_then,
)
# flip_cache = False
if self._xrange:
istart, istop = self._xrange
else:
self._xrange = istart, istop = x[0], x[-1]
# print(f"xrange: {self._xrange}")
# XXX: lol brutal, the internals of `CurvePoint` (inherited by
# our `LineDot`) required ``.getData()`` to work..
self.xData = x
self.yData = y
self._x, self._y = x, y
if view_range:
profiler(f'view range slice {view_range}')
# downsampling incremental state checking
uppx = self.x_uppx()
px_width = self.px_width()
uppx_diff = (uppx - self._last_uppx)
should_ds = False
should_redraw = False
# if a view range is passed, plan to draw the
# source ouput that's "in view" of the chart.
if view_range and not self._in_ds:
# print(f'{self._name} vr: {view_range}')
# by default we only pull data up to the last (current) index
x_out, y_out = x_iv[:-1], y_iv[:-1]
# step mode: draw flat top discrete "step"
# over the index space for each datum.
if self._step_mode:
# TODO: numba this bish
x_out, y_out = step_path_arrays_from_1d(
x_out,
y_out
)
profiler('generated step arrays')
should_redraw = True
profiler('sliced in-view array history')
# x_last = x_iv[-1]
# y_last = y_iv[-1]
self._last_vr = view_range
# self.disable_cache()
# flip_cache = True
else:
self._xrange = x[0], x[-1]
x_last = x[-1]
y_last = y[-1]
# check for downsampling conditions
if (
# std m4 downsample conditions
px_width
and uppx_diff >= 4
or uppx_diff <= -3
or self._step_mode and abs(uppx_diff) >= 4
):
log.info(
f'{self._name} sampler change: {self._last_uppx} -> {uppx}'
)
self._last_uppx = uppx
should_ds = True
elif (
uppx <= 2
and self._in_ds
):
# we should de-downsample back to our original
# source data so we clear our path data in prep
# to generate a new one from original source data.
should_redraw = True
should_ds = False
# compute the length diffs between the first/last index entry in
# the input data and the last indexes we have on record from the
# last time we updated the curve index.
prepend_length = int(istart - x[0])
append_length = int(x[-1] - istop)
# no_path_yet = self.path is None
if (
self.path is None
or should_redraw
or should_ds
or prepend_length > 0
):
if (
not view_range
or self._in_ds
):
# by default we only pull data up to the last (current) index
x_out, y_out = x[:-1], y[:-1]
# step mode: draw flat top discrete "step"
# over the index space for each datum.
if self._step_mode:
x_out, y_out = step_path_arrays_from_1d(
x_out,
y_out,
)
# TODO: numba this bish
profiler('generated step arrays')
if should_redraw:
profiler('path reversion to non-ds')
if self.path:
self.path.clear()
if self.fast_path:
self.fast_path.clear()
if should_redraw and not should_ds:
if self._in_ds:
log.info(f'DEDOWN -> {self._name}')
self._in_ds = False
elif should_ds and px_width:
x_out, y_out = self.downsample(
x_out,
y_out,
px_width,
uppx,
)
profiler(f'FULL PATH downsample redraw={should_ds}')
self._in_ds = True
self.path = pg.functions.arrayToQPath(
x_out,
y_out,
connect='all',
finiteCheck=False,
path=self.path,
)
profiler('generated fresh path')
# profiler(f'DRAW PATH IN VIEW -> {self._name}')
# reserve mem allocs see:
# - https://doc.qt.io/qt-5/qpainterpath.html#reserve
# - https://doc.qt.io/qt-5/qpainterpath.html#capacity
# - https://doc.qt.io/qt-5/qpainterpath.html#clear
# XXX: right now this is based on had hoc checks on a
# hidpi 3840x2160 4k monitor but we should optimize for
# the target display(s) on the sys.
# if no_path_yet:
# self.path.reserve(int(500e3))
# TODO: get this piecewise prepend working - right now it's
# giving heck on vwap...
# elif prepend_length:
# breakpoint()
# prepend_path = pg.functions.arrayToQPath(
# x[0:prepend_length],
# y[0:prepend_length],
# connect='all'
# )
# # swap prepend path in "front"
# old_path = self.path
# self.path = prepend_path
# # self.path.moveTo(new_x[0], new_y[0])
# self.path.connectPath(old_path)
elif (
append_length > 0
and not view_range
):
new_x = x[-append_length - 2:-1]
new_y = y[-append_length - 2:-1]
if self._step_mode:
new_x, new_y = step_path_arrays_from_1d(
new_x,
new_y,
)
# [1:] since we don't need the vertical line normally at
# the beginning of the step curve taking the first (x,
# y) poing down to the x-axis **because** this is an
# appended path graphic.
new_x = new_x[1:]
new_y = new_y[1:]
profiler('diffed append arrays')
if should_ds:
new_x, new_y = self.downsample(
new_x,
new_y,
**should_ds,
)
profiler(f'fast path downsample redraw={should_ds}')
append_path = pg.functions.arrayToQPath(
new_x,
new_y,
connect='all',
finiteCheck=False,
path=self.fast_path,
)
if self.use_fpath:
# an attempt at trying to make append-updates faster..
if self.fast_path is None:
self.fast_path = append_path
self.fast_path.reserve(int(6e3))
else:
self.fast_path.connectPath(append_path)
size = self.fast_path.capacity()
profiler(f'connected fast path w size: {size}')
# print(f"append_path br: {append_path.boundingRect()}")
# self.path.moveTo(new_x[0], new_y[0])
# path.connectPath(append_path)
# XXX: lol this causes a hang..
# self.path = self.path.simplified()
else:
size = self.path.capacity()
profiler(f'connected history path w size: {size}')
self.path.connectPath(append_path)
# other merging ideas:
# https://stackoverflow.com/questions/8936225/how-to-merge-qpainterpaths
# path.addPath(append_path)
# path.closeSubpath()
# TODO: try out new work from `pyqtgraph` main which
# should repair horrid perf:
# https://github.com/pyqtgraph/pyqtgraph/pull/2032
# ok, nope still horrible XD
# if self._fill:
# # XXX: super slow set "union" op
# self.path = self.path.united(append_path).simplified()
# self.disable_cache()
# flip_cache = True
# draw the "current" step graphic segment so it lines up with
# the "middle" of the current (OHLC) sample.
if self._step_mode:
self._last_line = QLineF(
x_last - 0.5, 0,
x_last + 0.5, 0,
)
self._last_step_rect = QRectF(
x_last - 0.5, 0,
x_last + 0.5, y_last
)
# print(
# f"path br: {self.path.boundingRect()}",
# f"fast path br: {self.fast_path.boundingRect()}",
# f"last rect br: {self._last_step_rect}",
# )
else:
self._last_line = QLineF(
x[-2], y[-2],
x[-1], y_last
)
profiler('draw last segment')
# trigger redraw of path
# do update before reverting to cache mode
# self.prepareGeometryChange()
self.update()
profiler('.update()')
# if flip_cache:
# # XXX: seems to be needed to avoid artifacts (see above).
# self.setCacheMode(QGraphicsItem.DeviceCoordinateCache)
# XXX: lol brutal, the internals of `CurvePoint` (inherited by
# our `LineDot`) required ``.getData()`` to work..
def getData(self):
return self._x, self._y
# TODO: drop the above after ``Cursor`` re-work
def get_arrays(self) -> tuple[np.ndarray, np.ndarray]:
return self._x, self._y
return self.xData, self.yData
def clear(self):
'''
@ -593,25 +233,18 @@ class FastAppendCurve(pg.GraphicsObject):
# self.fast_path.clear()
self.fast_path = None
# self.disable_cache()
# self.setCacheMode(QGraphicsItem.DeviceCoordinateCache)
def disable_cache(self) -> None:
'''
Disable the use of the pixel coordinate cache and trigger a geo event.
'''
# XXX: pretty annoying but, without this there's little
# artefacts on the append updates to the curve...
@cm
def reset_cache(self) -> None:
self.setCacheMode(QtWidgets.QGraphicsItem.NoCache)
self.prepareGeometryChange()
yield
self.setCacheMode(QGraphicsItem.DeviceCoordinateCache)
def boundingRect(self):
'''
Compute and then cache our rect.
'''
if self.path is None:
return QtGui.QPainterPath().boundingRect()
return QPainterPath().boundingRect()
else:
# dynamically override this method after initial
# path is created to avoid requiring the above None check
@ -623,6 +256,7 @@ class FastAppendCurve(pg.GraphicsObject):
Post init ``.boundingRect()```.
'''
# hb = self.path.boundingRect()
hb = self.path.controlPointRect()
hb_size = hb.size()
@ -630,17 +264,60 @@ class FastAppendCurve(pg.GraphicsObject):
if fp:
fhb = fp.controlPointRect()
hb_size = fhb.size() + hb_size
# print(f'hb_size: {hb_size}')
w = hb_size.width() + 1
h = hb_size.height() + 1
# if self._last_step_rect:
# hb_size += self._last_step_rect.size()
# if self._line:
# br = self._last_step_rect.bottomRight()
# tl = QPointF(
# # self._vr[0],
# # hb.topLeft().y(),
# # 0,
# # hb_size.height() + 1
# )
# br = self._last_step_rect.bottomRight()
w = hb_size.width()
h = hb_size.height()
sbr = self.sub_br
if sbr:
w, h = self.sub_br(w, h)
else:
# assume plain line graphic and use
# default unit step in each direction.
# only on a plane line do we include
# and extra index step's worth of width
# since in the step case the end of the curve
# actually terminates earlier so we don't need
# this for the last step.
w += self._last_w
# ll = self._last_line
h += 1 # ll.y2() - ll.y1()
# br = QPointF(
# self._vr[-1],
# # tl.x() + w,
# tl.y() + h,
# )
br = QRectF(
# top left
# hb.topLeft()
# tl,
QPointF(hb.topLeft()),
# br,
# total size
# QSizeF(hb_size)
# hb_size,
QSizeF(w, h)
)
# print(f'bounding rect: {br}')
@ -648,40 +325,36 @@ class FastAppendCurve(pg.GraphicsObject):
def paint(
self,
p: QtGui.QPainter,
p: QPainter,
opt: QtWidgets.QStyleOptionGraphicsItem,
w: QtWidgets.QWidget
) -> None:
profiler = pg.debug.Profiler(
msg=f'FastAppendCurve.paint(): `{self._name}`',
msg=f'Curve.paint(): `{self._name}`',
disabled=not pg_profile_enabled(),
gt=ms_slower_then,
ms_threshold=ms_slower_then,
)
if (
self._step_mode
and self._last_step_rect
):
brush = self._brush
sub_paint = self.sub_paint
if sub_paint:
sub_paint(p, profiler)
# p.drawLines(*tuple(filter(bool, self._last_step_lines)))
# p.drawRect(self._last_step_rect)
p.fillRect(self._last_step_rect, brush)
profiler('.fillRect()')
if self._last_line:
p.setPen(self.last_step_pen)
p.drawLine(self._last_line)
profiler('.drawLine()')
p.setPen(self._pen)
path = self.path
# cap = path.capacity()
# if cap != self._last_cap:
# print(f'NEW CAPACITY: {self._last_cap} -> {cap}')
# self._last_cap = cap
if path:
p.drawPath(path)
profiler('.drawPath(path)')
profiler(f'.drawPath(path): {path.capacity()}')
fp = self.fast_path
if fp:
@ -695,3 +368,117 @@ class FastAppendCurve(pg.GraphicsObject):
# if self._fill:
# brush = self.opts['brush']
# p.fillPath(self.path, brush)
def draw_last_datum(
self,
path: QPainterPath,
src_data: np.ndarray,
render_data: np.ndarray,
reset: bool,
array_key: str,
) -> None:
# default line draw last call
with self.reset_cache():
x = render_data['index']
y = render_data[array_key]
# draw the "current" step graphic segment so it
# lines up with the "middle" of the current
# (OHLC) sample.
self._last_line = QLineF(
x[-2], y[-2],
x[-1], y[-1],
)
return x, y
# TODO: this should probably be a "downsampled" curve type
# that draws a bar-style (but for the px column) last graphics
# element such that the current datum in view can be shown
# (via it's max / min) even when highly zoomed out.
class FlattenedOHLC(Curve):
def draw_last_datum(
self,
path: QPainterPath,
src_data: np.ndarray,
render_data: np.ndarray,
reset: bool,
array_key: str,
) -> None:
lasts = src_data[-2:]
x = lasts['index']
y = lasts['close']
# draw the "current" step graphic segment so it
# lines up with the "middle" of the current
# (OHLC) sample.
self._last_line = QLineF(
x[-2], y[-2],
x[-1], y[-1]
)
return x, y
class StepCurve(Curve):
def declare_paintables(
self,
) -> None:
self._last_step_rect = QRectF()
def draw_last_datum(
self,
path: QPainterPath,
src_data: np.ndarray,
render_data: np.ndarray,
reset: bool,
array_key: str,
w: float = 0.5,
) -> None:
# TODO: remove this and instead place all step curve
# updating into pre-path data render callbacks.
# full input data
x = src_data['index']
y = src_data[array_key]
x_last = x[-1]
y_last = y[-1]
# lol, commenting this makes step curves
# all "black" for me :eyeroll:..
self._last_line = QLineF(
x_last - w, 0,
x_last + w, 0,
)
self._last_step_rect = QRectF(
x_last - w, 0,
x_last + w, y_last,
)
return x, y
def sub_paint(
self,
p: QPainter,
profiler: pg.debug.Profiler,
) -> None:
# p.drawLines(*tuple(filter(bool, self._last_step_lines)))
# p.drawRect(self._last_step_rect)
p.fillRect(self._last_step_rect, self._brush)
profiler('.fillRect()')
def sub_br(
self,
path_w: float,
path_h: float,
) -> (float, float):
# passthrough
return path_w, path_h

179
piker/ui/_display.py
View File

@ -32,7 +32,7 @@ import trio
import pendulum
import pyqtgraph as pg
from .. import brokers
# from .. import brokers
from ..data.feed import open_feed
from ._axes import YAxisLabel
from ._chart import (
@ -54,16 +54,16 @@ from ._forms import (
mk_order_pane_layout,
)
from .order_mode import open_order_mode
# from .._profile import (
# pg_profile_enabled,
# ms_slower_then,
# )
from .._profile import (
pg_profile_enabled,
ms_slower_then,
)
from ..log import get_logger
log = get_logger(__name__)
# TODO: load this from a config.toml!
_quote_throttle_rate: int = 12 # Hz
_quote_throttle_rate: int = 22 # Hz
# a working tick-type-classes template
@ -96,28 +96,19 @@ def chart_maxmin(
Compute max and min datums "in view" for range limits.
'''
array = ohlcv_shm.array
ifirst = array[0]['index']
last_bars_range = chart.bars_range()
l, lbar, rbar, r = last_bars_range
in_view = array[lbar - ifirst:rbar - ifirst + 1]
out = chart.maxmin()
if not in_view.size:
log.warning('Resetting chart to data')
chart.default_view()
if out is None:
return (last_bars_range, 0, 0, 0)
mx, mn = (
np.nanmax(in_view['high']),
np.nanmin(in_view['low'],)
)
mn, mx = out
mx_vlm_in_view = 0
if vlm_chart:
mx_vlm_in_view = np.max(
in_view['volume']
)
out = vlm_chart.maxmin()
if out:
_, mx_vlm_in_view = out
return (
last_bars_range,
@ -272,6 +263,7 @@ async def graphics_update_loop(
'vars': {
'tick_margin': tick_margin,
'i_last': i_last,
'i_last_append': i_last,
'last_mx_vlm': last_mx_vlm,
'last_mx': last_mx,
'last_mn': last_mn,
@ -318,6 +310,7 @@ def graphics_update_cycle(
ds: DisplayState,
wap_in_history: bool = False,
trigger_all: bool = False, # flag used by prepend history updates
prepend_update_index: Optional[int] = None,
) -> None:
# TODO: eventually optimize this whole graphics stack with ``numba``
@ -327,9 +320,12 @@ def graphics_update_cycle(
profiler = pg.debug.Profiler(
msg=f'Graphics loop cycle for: `{chart.name}`',
disabled=True, # not pg_profile_enabled(),
gt=1/12 * 1e3,
# gt=ms_slower_then,
delayed=True,
disabled=not pg_profile_enabled(),
# disabled=True,
ms_threshold=ms_slower_then,
# ms_threshold=1/12 * 1e3,
)
# unpack multi-referenced components
@ -340,12 +336,12 @@ def graphics_update_cycle(
vars = ds.vars
tick_margin = vars['tick_margin']
update_uppx = 6
update_uppx = 16
for sym, quote in ds.quotes.items():
# compute the first available graphic's x-units-per-pixel
xpx = vlm_chart.view.x_uppx()
uppx = vlm_chart.view.x_uppx()
# NOTE: vlm may be written by the ``brokerd`` backend
# event though a tick sample is not emitted.
@ -364,26 +360,58 @@ def graphics_update_cycle(
i_diff = i_step - vars['i_last']
vars['i_last'] = i_step
append_diff = i_step - vars['i_last_append']
# update the "last datum" (aka extending the flow graphic with
# new data) only if the number of unit steps is >= the number of
# such unit steps per pixel (aka uppx). Iow, if the zoom level
# is such that a datum(s) update to graphics wouldn't span
# to a new pixel, we don't update yet.
do_append = (append_diff >= uppx)
if do_append:
vars['i_last_append'] = i_step
do_rt_update = uppx < update_uppx
# print(
# f'append_diff:{append_diff}\n'
# f'uppx:{uppx}\n'
# f'do_append: {do_append}'
# )
# TODO: we should only run mxmn when we know
# an update is due via ``do_append`` above.
(
brange,
mx_in_view,
mn_in_view,
mx_vlm_in_view,
) = ds.maxmin()
l, lbar, rbar, r = brange
mx = mx_in_view + tick_margin
mn = mn_in_view - tick_margin
profiler('maxmin call')
liv = r > i_step # the last datum is in view
profiler('`ds.maxmin()` call')
liv = r >= i_step # the last datum is in view
if (
prepend_update_index is not None
and lbar > prepend_update_index
):
# on a history update (usually from the FSP subsys)
# if the segment of history that is being prepended
# isn't in view there is no reason to do a graphics
# update.
log.debug('Skipping prepend graphics cycle: frame not in view')
return
# don't real-time "shift" the curve to the
# left unless we get one of the following:
if (
(
i_diff > 0 # no new sample step
and xpx < 4 # chart is zoomed out very far
and r >= i_step # the last datum isn't in view
# i_diff > 0 # no new sample step
do_append
# and uppx < 4 # chart is zoomed out very far
and liv
)
or trigger_all
@ -393,6 +421,11 @@ def graphics_update_cycle(
# and then iff update curves and shift?
chart.increment_view(steps=i_diff)
if vlm_chart:
vlm_chart.increment_view(steps=i_diff)
profiler('view incremented')
if vlm_chart:
# always update y-label
ds.vlm_sticky.update_from_data(
@ -401,17 +434,16 @@ def graphics_update_cycle(
if (
(
xpx < update_uppx or i_diff > 0
do_rt_update
or do_append
and liv
)
or trigger_all
):
# TODO: make it so this doesn't have to be called
# once the $vlm is up?
vlm_chart.update_graphics_from_array(
vlm_chart.update_graphics_from_flow(
'volume',
array,
# UGGGh, see ``maxmin()`` impl in `._fsp` for
# the overlayed plotitems... we need a better
# bay to invoke a maxmin per overlay..
@ -424,6 +456,7 @@ def graphics_update_cycle(
# connected to update accompanying overlay
# graphics..
)
profiler('`vlm_chart.update_graphics_from_flow()`')
if (
mx_vlm_in_view != vars['last_mx_vlm']
@ -432,22 +465,29 @@ def graphics_update_cycle(
vlm_chart.view._set_yrange(
yrange=yrange,
)
profiler('`vlm_chart.view._set_yrange()`')
# print(f'mx vlm: {last_mx_vlm} -> {mx_vlm_in_view}')
vars['last_mx_vlm'] = mx_vlm_in_view
for curve_name, flow in vlm_chart._flows.items():
if not flow.render:
continue
update_fsp_chart(
vlm_chart,
flow,
curve_name,
array_key=curve_name,
# do_append=uppx < update_uppx,
do_append=do_append,
)
# is this even doing anything?
# (pretty sure it's the real-time
# resizing from last quote?)
fvb = flow.plot.vb
fvb._set_yrange(
autoscale_linked_plots=False,
# autoscale_linked_plots=False,
name=curve_name,
)
@ -496,13 +536,17 @@ def graphics_update_cycle(
# update ohlc sampled price bars
if (
xpx < update_uppx
or i_diff > 0
do_rt_update
or do_append
or trigger_all
):
chart.update_graphics_from_array(
# TODO: we should always update the "last" datum
# since the current range should at least be updated
# to it's max/min on the last pixel.
chart.update_graphics_from_flow(
chart.name,
array,
# do_append=uppx < update_uppx,
do_append=do_append,
)
# iterate in FIFO order per tick-frame
@ -515,6 +559,7 @@ def graphics_update_cycle(
# tick frames to determine the y-range for chart
# auto-scaling.
# TODO: we need a streaming minmax algo here, see def above.
if liv:
mx = max(price + tick_margin, mx)
mn = min(price - tick_margin, mn)
@ -539,9 +584,8 @@ def graphics_update_cycle(
if wap_in_history:
# update vwap overlay line
chart.update_graphics_from_array(
chart.update_graphics_from_flow(
'bar_wap',
array,
)
# L1 book label-line updates
@ -557,7 +601,7 @@ def graphics_update_cycle(
if (
label is not None
# and liv
and liv
):
label.update_fields(
{'level': price, 'size': size}
@ -571,7 +615,7 @@ def graphics_update_cycle(
typ in _tick_groups['asks']
# TODO: instead we could check if the price is in the
# y-view-range?
# and liv
and liv
):
l1.ask_label.update_fields({'level': price, 'size': size})
@ -579,7 +623,7 @@ def graphics_update_cycle(
typ in _tick_groups['bids']
# TODO: instead we could check if the price is in the
# y-view-range?
# and liv
and liv
):
l1.bid_label.update_fields({'level': price, 'size': size})
@ -594,6 +638,7 @@ def graphics_update_cycle(
main_vb._ic is None
or not main_vb._ic.is_set()
):
# print(f'updating range due to mxmn')
main_vb._set_yrange(
# TODO: we should probably scale
# the view margin based on the size
@ -604,10 +649,24 @@ def graphics_update_cycle(
yrange=(mn, mx),
)
# XXX: update this every draw cycle to make L1-always-in-view work.
vars['last_mx'], vars['last_mn'] = mx, mn
# run synchronous update on all linked flows
for curve_name, flow in chart._flows.items():
if (
not (do_rt_update or do_append)
and liv
# even if we're downsampled bigly
# draw the last datum in the final
# px column to give the user the mx/mn
# range of that set.
):
# always update the last datum-element
# graphic for all flows
flow.draw_last(array_key=curve_name)
# TODO: should the "main" (aka source) flow be special?
if curve_name == chart.data_key:
continue
@ -643,7 +702,7 @@ async def display_symbol_data(
)
# historical data fetch
brokermod = brokers.get_brokermod(provider)
# brokermod = brokers.get_brokermod(provider)
# ohlc_status_done = sbar.open_status(
# 'retreiving OHLC history.. ',
@ -692,32 +751,31 @@ async def display_symbol_data(
# create main OHLC chart
chart = linked.plot_ohlc_main(
symbol,
bars,
ohlcv,
sidepane=pp_pane,
)
chart.default_view()
chart._feeds[symbol.key] = feed
chart.setFocus()
# plot historical vwap if available
wap_in_history = False
if brokermod._show_wap_in_history:
# XXX: FOR SOME REASON THIS IS CAUSING HANGZ!?!
# if brokermod._show_wap_in_history:
if 'bar_wap' in bars.dtype.fields:
wap_in_history = True
chart.draw_curve(
name='bar_wap',
data=bars,
add_label=False,
)
# if 'bar_wap' in bars.dtype.fields:
# wap_in_history = True
# chart.draw_curve(
# name='bar_wap',
# shm=ohlcv,
# color='default_light',
# add_label=False,
# )
# size view to data once at outset
chart.cv._set_yrange()
# TODO: a data view api that makes this less shit
chart._shm = ohlcv
chart._flows[chart.data_key].shm = ohlcv
# NOTE: we must immediately tell Qt to show the OHLC chart
# to avoid a race where the subplots get added/shown to
# the linked set *before* the main price chart!
@ -780,6 +838,5 @@ async def display_symbol_data(
sbar._status_groups[loading_sym_key][1]()
# let the app run.. bby
chart.default_view()
# linked.graphics_cycle()
await trio.sleep_forever()

2
piker/ui/_editors.py
View File

@ -343,7 +343,7 @@ class SelectRect(QtGui.QGraphicsRectItem):
nbars = ixmx - ixmn + 1
chart = self._chart
data = chart._arrays[chart.name][ixmn:ixmx]
data = chart._flows[chart.name].shm.array[ixmn:ixmx]
if len(data):
std = data['close'].std()

4
piker/ui/_exec.py
View File

@ -49,10 +49,6 @@ from . import _style
log = get_logger(__name__)
# pyqtgraph global config
# might as well enable this for now?
pg.useOpenGL = True
pg.enableExperimental = True
# engage core tweaks that give us better response
# latency then the average pg user
_do_overrides()

1204
piker/ui/_flows.py 100644
View File

File diff suppressed because it is too large Load Diff

85
piker/ui/_fsp.py
View File

@ -75,6 +75,7 @@ def update_fsp_chart(
flow,
graphics_name: str,
array_key: Optional[str],
**kwargs,
) -> None:
@ -93,10 +94,10 @@ def update_fsp_chart(
# update graphics
# NOTE: this does a length check internally which allows it
# staying above the last row check below..
chart.update_graphics_from_array(
chart.update_graphics_from_flow(
graphics_name,
array,
array_key=array_key or graphics_name,
**kwargs,
)
# XXX: re: ``array_key``: fsp func names must be unique meaning we
@ -106,9 +107,6 @@ def update_fsp_chart(
# read from last calculated value and update any label
last_val_sticky = chart._ysticks.get(graphics_name)
if last_val_sticky:
# array = shm.array[array_key]
# if len(array):
# value = array[-1]
last = last_row[array_key]
last_val_sticky.update_from_data(-1, last)
@ -246,20 +244,18 @@ async def run_fsp_ui(
chart.draw_curve(
name=name,
data=shm.array,
shm=shm,
overlay=True,
color='default_light',
array_key=name,
**conf.get('chart_kwargs', {})
)
# specially store ref to shm for lookup in display loop
chart._flows[name].shm = shm
else:
# create a new sub-chart widget for this fsp
chart = linkedsplits.add_plot(
name=name,
array=shm.array,
shm=shm,
array_key=name,
sidepane=sidepane,
@ -271,12 +267,6 @@ async def run_fsp_ui(
**conf.get('chart_kwargs', {})
)
# XXX: ONLY for sub-chart fsps, overlays have their
# data looked up from the chart's internal array set.
# TODO: we must get a data view api going STAT!!
chart._shm = shm
chart._flows[chart.data_key].shm = shm
# should **not** be the same sub-chart widget
assert chart.name != linkedsplits.chart.name
@ -445,12 +435,16 @@ class FspAdmin:
# wait for graceful shutdown signal
async with stream.subscribe() as stream:
async for msg in stream:
if msg == 'update':
info = msg.get('fsp_update')
if info:
# if the chart isn't hidden try to update
# the data on screen.
if not self.linked.isHidden():
log.info(f'Re-syncing graphics for fsp: {ns_path}')
self.linked.graphics_cycle(trigger_all=True)
self.linked.graphics_cycle(
trigger_all=True,
prepend_update_index=info['first'],
)
else:
log.info(f'recved unexpected fsp engine msg: {msg}')
@ -626,7 +620,7 @@ async def open_vlm_displays(
shm = ohlcv
chart = linked.add_plot(
name='volume',
array=shm.array,
shm=shm,
array_key='volume',
sidepane=sidepane,
@ -639,10 +633,9 @@ async def open_vlm_displays(
# the curve item internals are pretty convoluted.
style='step',
)
chart._flows['volume'].shm = ohlcv
# force 0 to always be in view
def maxmin(
def multi_maxmin(
names: list[str],
) -> tuple[float, float]:
@ -658,7 +651,7 @@ async def open_vlm_displays(
return 0, mx
chart.view.maxmin = partial(maxmin, names=['volume'])
chart.view.maxmin = partial(multi_maxmin, names=['volume'])
# TODO: fix the x-axis label issue where if you put
# the axis on the left it's totally not lined up...
@ -666,11 +659,6 @@ async def open_vlm_displays(
# chart.hideAxis('right')
# chart.showAxis('left')
# XXX: ONLY for sub-chart fsps, overlays have their
# data looked up from the chart's internal array set.
# TODO: we must get a data view api going STAT!!
chart._shm = shm
# send back new chart to caller
task_status.started(chart)
@ -685,9 +673,9 @@ async def open_vlm_displays(
last_val_sticky.update_from_data(-1, value)
vlm_curve = chart.update_graphics_from_array(
vlm_curve = chart.update_graphics_from_flow(
'volume',
shm.array,
# shm.array,
)
# size view to data once at outset
@ -753,19 +741,20 @@ async def open_vlm_displays(
'dolla_vlm',
'dark_vlm',
]
dvlm_rate_fields = [
'dvlm_rate',
'dark_dvlm_rate',
]
# dvlm_rate_fields = [
# 'dvlm_rate',
# 'dark_dvlm_rate',
# ]
trade_rate_fields = [
'trade_rate',
'dark_trade_rate',
]
group_mxmn = partial(
maxmin,
multi_maxmin,
# keep both regular and dark vlm in view
names=fields + dvlm_rate_fields,
names=fields,
# names=fields + dvlm_rate_fields,
)
# add custom auto range handler
@ -795,9 +784,8 @@ async def open_vlm_displays(
color = 'bracket'
curve, _ = chart.draw_curve(
# name='dolla_vlm',
name=name,
data=shm.array,
shm=shm,
array_key=name,
overlay=pi,
color=color,
@ -812,7 +800,6 @@ async def open_vlm_displays(
# ``.draw_curve()``.
flow = chart._flows[name]
assert flow.plot is pi
flow.shm = shm
chart_curves(
fields,
@ -834,11 +821,11 @@ async def open_vlm_displays(
)
await started.wait()
chart_curves(
dvlm_rate_fields,
dvlm_pi,
fr_shm,
)
# chart_curves(
# dvlm_rate_fields,
# dvlm_pi,
# fr_shm,
# )
# TODO: is there a way to "sync" the dual axes such that only
# one curve is needed?
@ -847,7 +834,9 @@ async def open_vlm_displays(
# liquidity events (well at least on low OHLC periods - 1s).
vlm_curve.hide()
chart.removeItem(vlm_curve)
chart._flows.pop('volume')
vflow = chart._flows['volume']
vflow.render = False
# avoid range sorting on volume once disabled
chart.view.disable_auto_yrange()
@ -874,7 +863,7 @@ async def open_vlm_displays(
)
# add custom auto range handler
tr_pi.vb.maxmin = partial(
maxmin,
multi_maxmin,
# keep both regular and dark vlm in view
names=trade_rate_fields,
)
@ -902,10 +891,10 @@ async def open_vlm_displays(
# built-in vlm fsps
for target, conf in {
tina_vwap: {
'overlay': 'ohlc', # overlays with OHLCV (main) chart
'anchor': 'session',
},
# tina_vwap: {
# 'overlay': 'ohlc', # overlays with OHLCV (main) chart
# 'anchor': 'session',
# },
}.items():
started = await admin.open_fsp_chart(
target,

169
piker/ui/_interaction.py
View File

@ -20,7 +20,6 @@ Chart view box primitives
"""
from __future__ import annotations
from contextlib import asynccontextmanager
# import itertools
import time
from typing import Optional, Callable
@ -35,10 +34,9 @@ import trio
from ..log import get_logger
from .._profile import pg_profile_enabled, ms_slower_then
from ._style import _min_points_to_show
# from ._style import _min_points_to_show
from ._editors import SelectRect
from . import _event
from ._ohlc import BarItems
log = get_logger(__name__)
@ -486,15 +484,18 @@ class ChartView(ViewBox):
# don't zoom more then the min points setting
l, lbar, rbar, r = chart.bars_range()
vl = r - l
# vl = r - l
if ev.delta() > 0 and vl <= _min_points_to_show:
log.debug("Max zoom bruh...")
return
# if ev.delta() > 0 and vl <= _min_points_to_show:
# log.debug("Max zoom bruh...")
# return
if ev.delta() < 0 and vl >= len(chart._arrays[chart.name]) + 666:
log.debug("Min zoom bruh...")
return
# if (
# ev.delta() < 0
# and vl >= len(chart._flows[chart.name].shm.array) + 666
# ):
# log.debug("Min zoom bruh...")
# return
# actual scaling factor
s = 1.015 ** (ev.delta() * -1 / 20) # self.state['wheelScaleFactor'])
@ -568,11 +569,23 @@ class ChartView(ViewBox):
self._resetTarget()
self.scaleBy(s, focal)
# XXX: the order of the next 2 lines i'm pretty sure
# matters, we want the resize to trigger before the graphics
# update, but i gotta feelin that because this one is signal
# based (and thus not necessarily sync invoked right away)
# that calling the resize method manually might work better.
self.sigRangeChangedManually.emit(mask)
# self._ic.set()
# self._ic = None
# self.chart.resume_all_feeds()
# XXX: without this is seems as though sometimes
# when zooming in from far out (and maybe vice versa?)
# the signal isn't being fired enough since if you pan
# just after you'll see further downsampling code run
# (pretty noticeable on the OHLC ds curve) but with this
# that never seems to happen? Only question is how much this
# "double work" is causing latency when these missing event
# fires don't happen?
self.maybe_downsample_graphics()
ev.accept()
@ -734,9 +747,8 @@ class ChartView(ViewBox):
# flag to prevent triggering sibling charts from the same linked
# set from recursion errors.
autoscale_linked_plots: bool = True,
autoscale_linked_plots: bool = False,
name: Optional[str] = None,
# autoscale_overlays: bool = False,
) -> None:
'''
@ -747,9 +759,12 @@ class ChartView(ViewBox):
data set.
'''
name = self.name
# print(f'YRANGE ON {name}')
profiler = pg.debug.Profiler(
msg=f'`ChartView._set_yrange()`: `{name}`',
disabled=not pg_profile_enabled(),
gt=ms_slower_then,
ms_threshold=ms_slower_then,
delayed=True,
)
set_range = True
@ -775,45 +790,22 @@ class ChartView(ViewBox):
elif yrange is not None:
ylow, yhigh = yrange
# calculate max, min y values in viewable x-range from data.
# Make sure min bars/datums on screen is adhered.
else:
br = bars_range or chart.bars_range()
profiler(f'got bars range: {br}')
# TODO: maybe should be a method on the
# chart widget/item?
# if False:
# if autoscale_linked_plots:
# # avoid recursion by sibling plots
# linked = self.linkedsplits
# plots = list(linked.subplots.copy().values())
# main = linked.chart
# if main:
# plots.append(main)
# for chart in plots:
# if chart and not chart._static_yrange:
# chart.cv._set_yrange(
# bars_range=br,
# autoscale_linked_plots=False,
# )
# profiler('autoscaled linked plots')
if set_range:
if not yrange:
# XXX: only compute the mxmn range
# if none is provided as input!
if not yrange:
# flow = chart._flows[name]
yrange = self._maxmin()
if yrange is None:
log.warning(f'No yrange provided for {self.name}!?')
log.warning(f'No yrange provided for {name}!?')
print(f"WTF NO YRANGE {name}")
return
ylow, yhigh = yrange
profiler(f'maxmin(): {yrange}')
profiler(f'callback ._maxmin(): {yrange}')
# view margins: stay within a % of the "true range"
diff = yhigh - ylow
@ -830,6 +822,8 @@ class ChartView(ViewBox):
self.setYRange(ylow, yhigh)
profiler(f'set limits: {(ylow, yhigh)}')
profiler.finish()
def enable_auto_yrange(
self,
src_vb: Optional[ChartView] = None,
@ -843,17 +837,9 @@ class ChartView(ViewBox):
if src_vb is None:
src_vb = self
# such that when a linked chart changes its range
# this local view is also automatically changed and
# resized to data.
src_vb.sigXRangeChanged.connect(self._set_yrange)
# splitter(s) resizing
src_vb.sigResized.connect(self._set_yrange)
# mouse wheel doesn't emit XRangeChanged
src_vb.sigRangeChangedManually.connect(self._set_yrange)
# TODO: a smarter way to avoid calling this needlessly?
# 2 things i can think of:
# - register downsample-able graphics specially and only
@ -864,15 +850,16 @@ class ChartView(ViewBox):
self.maybe_downsample_graphics
)
def disable_auto_yrange(
self,
) -> None:
# mouse wheel doesn't emit XRangeChanged
src_vb.sigRangeChangedManually.connect(self._set_yrange)
# self._chart._static_yrange = 'axis'
# src_vb.sigXRangeChanged.connect(self._set_yrange)
# src_vb.sigXRangeChanged.connect(
# self.maybe_downsample_graphics
# )
def disable_auto_yrange(self) -> None:
self.sigXRangeChanged.disconnect(
self._set_yrange,
)
self.sigResized.disconnect(
self._set_yrange,
)
@ -883,6 +870,11 @@ class ChartView(ViewBox):
self._set_yrange,
)
# self.sigXRangeChanged.disconnect(self._set_yrange)
# self.sigXRangeChanged.disconnect(
# self.maybe_downsample_graphics
# )
def x_uppx(self) -> float:
'''
Return the "number of x units" within a single
@ -890,7 +882,7 @@ class ChartView(ViewBox):
graphics items which are our children.
'''
graphics = list(self._chart._graphics.values())
graphics = [f.graphics for f in self._chart._flows.values()]
if not graphics:
return 0
@ -901,25 +893,21 @@ class ChartView(ViewBox):
else:
return 0
def maybe_downsample_graphics(self):
uppx = self.x_uppx()
if (
# we probably want to drop this once we are "drawing in
# view" for downsampled flows..
uppx and uppx > 16
and self._ic is not None
def maybe_downsample_graphics(
self,
autoscale_overlays: bool = True,
):
# don't bother updating since we're zoomed out bigly and
# in a pan-interaction, in which case we shouldn't be
# doing view-range based rendering (at least not yet).
# print(f'{uppx} exiting early!')
return
profiler = pg.debug.Profiler(
msg=f'ChartView.maybe_downsample_graphics() for {self.name}',
disabled=not pg_profile_enabled(),
gt=3,
delayed=True,
# XXX: important to avoid not seeing underlying
# ``.update_graphics_from_flow()`` nested profiling likely
# due to the way delaying works and garbage collection of
# the profiler in the delegated method calls.
ms_threshold=6,
# ms_threshold=ms_slower_then,
)
# TODO: a faster single-loop-iterator way of doing this XD
@ -928,19 +916,32 @@ class ChartView(ViewBox):
plots = linked.subplots | {chart.name: chart}
for chart_name, chart in plots.items():
for name, flow in chart._flows.items():
graphics = flow.graphics
use_vr = False
if isinstance(graphics, BarItems):
use_vr = True
if (
not flow.render
# XXX: super important to be aware of this.
# or not flow.graphics.isVisible()
):
continue
# pass in no array which will read and render from the last
# passed array (normally provided by the display loop.)
chart.update_graphics_from_array(
chart.update_graphics_from_flow(
name,
use_vr=use_vr,
profiler=profiler,
use_vr=True,
)
profiler(f'range change updated {chart_name}:{name}')
profiler.finish()
# for each overlay on this chart auto-scale the
# y-range to max-min values.
if autoscale_overlays:
overlay = chart.pi_overlay
if overlay:
for pi in overlay.overlays:
pi.vb._set_yrange(
# TODO: get the range once up front...
# bars_range=br,
)
profiler('autoscaled linked plots')
profiler(f'<{chart_name}>.update_graphics_from_flow({name})')

580
piker/ui/_ohlc.py
View File

@ -25,17 +25,13 @@ from typing import (
import numpy as np
import pyqtgraph as pg
from numba import njit, float64, int64 # , optional
from PyQt5 import QtCore, QtGui, QtWidgets
from PyQt5.QtCore import QLineF, QPointF
# from numba import types as ntypes
# from ..data._source import numba_ohlc_dtype
from PyQt5.QtGui import QPainterPath
from .._profile import pg_profile_enabled, ms_slower_then
from ._style import hcolor
from ..log import get_logger
from ._curve import FastAppendCurve
from ._compression import ohlc_flatten
if TYPE_CHECKING:
from ._chart import LinkedSplits
@ -46,7 +42,8 @@ log = get_logger(__name__)
def bar_from_ohlc_row(
row: np.ndarray,
w: float
# 0.5 is no overlap between arms, 1.0 is full overlap
w: float = 0.43
) -> tuple[QLineF]:
'''
@ -84,128 +81,11 @@ def bar_from_ohlc_row(
return [hl, o, c]
@njit(
# TODO: for now need to construct this manually for readonly arrays, see
# https://github.com/numba/numba/issues/4511
# ntypes.tuple((float64[:], float64[:], float64[:]))(
# numba_ohlc_dtype[::1], # contiguous
# int64,
# optional(float64),
# ),
nogil=True
)
def path_arrays_from_ohlc(
data: np.ndarray,
start: int64,
bar_gap: float64 = 0.43,
) -> np.ndarray:
'''
Generate an array of lines objects from input ohlc data.
'''
size = int(data.shape[0] * 6)
x = np.zeros(
# data,
shape=size,
dtype=float64,
)
y, c = x.copy(), x.copy()
# TODO: report bug for assert @
# /home/goodboy/repos/piker/env/lib/python3.8/site-packages/numba/core/typing/builtins.py:991
for i, q in enumerate(data[start:], start):
# TODO: ask numba why this doesn't work..
# open, high, low, close, index = q[
# ['open', 'high', 'low', 'close', 'index']]
open = q['open']
high = q['high']
low = q['low']
close = q['close']
index = float64(q['index'])
istart = i * 6
istop = istart + 6
# x,y detail the 6 points which connect all vertexes of a ohlc bar
x[istart:istop] = (
index - bar_gap,
index,
index,
index,
index,
index + bar_gap,
)
y[istart:istop] = (
open,
open,
low,
high,
close,
close,
)
# specifies that the first edge is never connected to the
# prior bars last edge thus providing a small "gap"/"space"
# between bars determined by ``bar_gap``.
c[istart:istop] = (1, 1, 1, 1, 1, 0)
return x, y, c
def gen_qpath(
data: np.ndarray,
start: int, # XXX: do we need this?
w: float,
path: Optional[QtGui.QPainterPath] = None,
) -> QtGui.QPainterPath:
path_was_none = path is None
profiler = pg.debug.Profiler(
msg='gen_qpath ohlc',
disabled=not pg_profile_enabled(),
gt=ms_slower_then,
)
x, y, c = path_arrays_from_ohlc(
data,
start,
bar_gap=w,
)
profiler("generate stream with numba")
# TODO: numba the internals of this!
path = pg.functions.arrayToQPath(
x,
y,
connect=c,
path=path,
)
# avoid mem allocs if possible
if path_was_none:
path.reserve(path.capacity())
profiler("generate path with arrayToQPath")
return path
class BarItems(pg.GraphicsObject):
'''
"Price range" bars graphics rendered from a OHLC sampled sequence.
'''
sigPlotChanged = QtCore.pyqtSignal(object)
# 0.5 is no overlap between arms, 1.0 is full overlap
w: float = 0.43
def __init__(
self,
linked: LinkedSplits,
@ -225,389 +105,14 @@ class BarItems(pg.GraphicsObject):
self.last_bar_pen = pg.mkPen(hcolor(last_bar_color), width=2)
self._name = name
self._ds_line_xy: Optional[
tuple[np.ndarray, np.ndarray]
] = None
# NOTE: this prevents redraws on mouse interaction which is
# a huge boon for avg interaction latency.
# TODO: one question still remaining is if this makes trasform
# interactions slower (such as zooming) and if so maybe if/when
# we implement a "history" mode for the view we disable this in
# that mode?
self.setCacheMode(QtWidgets.QGraphicsItem.DeviceCoordinateCache)
self._pi = plotitem
self.path = QtGui.QPainterPath()
self.fast_path = QtGui.QPainterPath()
self._xrange: tuple[int, int]
self._yrange: tuple[float, float]
self._vrange = None
# TODO: don't render the full backing array each time
# self._path_data = None
self.path = QPainterPath()
self._last_bar_lines: Optional[tuple[QLineF, ...]] = None
# track the current length of drawable lines within the larger array
self.start_index: int = 0
self.stop_index: int = 0
# downsampler-line state
self._in_ds: bool = False
self._ds_line: Optional[FastAppendCurve] = None
self._dsi: tuple[int, int] = 0, 0
self._xs_in_px: float = 0
def draw_from_data(
self,
ohlc: np.ndarray,
start: int = 0,
) -> QtGui.QPainterPath:
'''
Draw OHLC datum graphics from a ``np.ndarray``.
This routine is usually only called to draw the initial history.
'''
hist, last = ohlc[:-1], ohlc[-1]
self.path = gen_qpath(hist, start, self.w)
# save graphics for later reference and keep track
# of current internal "last index"
# self.start_index = len(ohlc)
index = ohlc['index']
self._xrange = (index[0], index[-1])
self._yrange = (
np.nanmax(ohlc['high']),
np.nanmin(ohlc['low']),
)
# up to last to avoid double draw of last bar
self._last_bar_lines = bar_from_ohlc_row(last, self.w)
x, y = self._ds_line_xy = ohlc_flatten(ohlc)
# TODO: figuring out the most optimial size for the ideal
# curve-path by,
# - calcing the display's max px width `.screen()`
# - drawing a curve and figuring out it's capacity:
# https://doc.qt.io/qt-5/qpainterpath.html#capacity
# - reserving that cap for each curve-mapped-to-shm with
# - leveraging clearing when needed to redraw the entire
# curve that does not release mem allocs:
# https://doc.qt.io/qt-5/qpainterpath.html#clear
curve = FastAppendCurve(
y=y,
x=x,
name='OHLC',
color=self._color,
)
curve.hide()
self._pi.addItem(curve)
self._ds_line = curve
self._ds_xrange = (index[0], index[-1])
# trigger render
# https://doc.qt.io/qt-5/qgraphicsitem.html#update
self.update()
return self.path
def x_uppx(self) -> int:
if self._ds_line:
return self._ds_line.x_uppx()
else:
# we expect the downsample curve report this.
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(),
gt=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.
profiler.finish()
# print('terminating early')
return
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()
# 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 boundingRect(self):
# Qt docs: https://doc.qt.io/qt-5/qgraphicsitem.html#boundingRect
@ -630,16 +135,6 @@ class BarItems(pg.GraphicsObject):
hb.bottomRight(),
)
# fp = self.fast_path
# if fp:
# fhb = fp.controlPointRect()
# print((hb_tl, hb_br))
# print(fhb)
# hb_tl, hb_br = (
# fhb.topLeft() + hb.topLeft(),
# fhb.bottomRight() + hb.bottomRight(),
# )
# need to include last bar height or BR will be off
mx_y = hb_br.y()
mn_y = hb_tl.y()
@ -675,12 +170,9 @@ class BarItems(pg.GraphicsObject):
) -> None:
if self._in_ds:
return
profiler = pg.debug.Profiler(
disabled=not pg_profile_enabled(),
gt=ms_slower_then,
ms_threshold=ms_slower_then,
)
# p.setCompositionMode(0)
@ -692,6 +184,7 @@ class BarItems(pg.GraphicsObject):
# lead to any perf gains other then when zoomed in to less bars
# in view.
p.setPen(self.last_bar_pen)
if self._last_bar_lines:
p.drawLines(*tuple(filter(bool, self._last_bar_lines)))
profiler('draw last bar')
@ -699,6 +192,59 @@ class BarItems(pg.GraphicsObject):
p.drawPath(self.path)
profiler(f'draw history path: {self.path.capacity()}')
# if self.fast_path:
# p.drawPath(self.fast_path)
# profiler('draw fast path')
def draw_last_datum(
self,
path: QPainterPath,
src_data: np.ndarray,
render_data: np.ndarray,
reset: bool,
array_key: str,
fields: list[str] = [
'index',
'open',
'high',
'low',
'close',
],
) -> None:
# relevant fields
ohlc = src_data[fields]
last_row = ohlc[-1:]
# individual values
last_row = i, o, h, l, last = ohlc[-1]
# generate new lines objects for updatable "current bar"
self._last_bar_lines = bar_from_ohlc_row(last_row)
# assert i == graphics.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?
return ohlc['index'], ohlc['close']

236
piker/ui/_pathops.py 100644
View File

@ -0,0 +1,236 @@
# piker: trading gear for hackers
# Copyright (C) 2018-present Tyler Goodlet (in stewardship of piker0)
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Affero General Public License for more details.
# You should have received a copy of the GNU Affero General Public License
# along with this program. If not, see <https://www.gnu.org/licenses/>.
"""
Super fast ``QPainterPath`` generation related operator routines.
"""
from __future__ import annotations
from typing import (
# Optional,
TYPE_CHECKING,
)
import numpy as np
from numpy.lib import recfunctions as rfn
from numba import njit, float64, int64 # , optional
# import pyqtgraph as pg
from PyQt5 import QtGui
# from PyQt5.QtCore import QLineF, QPointF
from ..data._sharedmem import (
ShmArray,
)
# from .._profile import pg_profile_enabled, ms_slower_then
from ._compression import (
ds_m4,
)
if TYPE_CHECKING:
from ._flows import Renderer
def xy_downsample(
x,
y,
uppx,
x_spacer: float = 0.5,
) -> tuple[np.ndarray, np.ndarray]:
# downsample whenever more then 1 pixels per datum can be shown.
# always refresh data bounds until we get diffing
# working properly, see above..
bins, x, y = ds_m4(
x,
y,
uppx,
)
# flatten output to 1d arrays suitable for path-graphics generation.
x = np.broadcast_to(x[:, None], y.shape)
x = (x + np.array(
[-x_spacer, 0, 0, x_spacer]
)).flatten()
y = y.flatten()
return x, y
@njit(
# TODO: for now need to construct this manually for readonly arrays, see
# https://github.com/numba/numba/issues/4511
# ntypes.tuple((float64[:], float64[:], float64[:]))(
# numba_ohlc_dtype[::1], # contiguous
# int64,
# optional(float64),
# ),
nogil=True
)
def path_arrays_from_ohlc(
data: np.ndarray,
start: int64,
bar_gap: float64 = 0.43,
) -> np.ndarray:
'''
Generate an array of lines objects from input ohlc data.
'''
size = int(data.shape[0] * 6)
x = np.zeros(
# data,
shape=size,
dtype=float64,
)
y, c = x.copy(), x.copy()
# TODO: report bug for assert @
# /home/goodboy/repos/piker/env/lib/python3.8/site-packages/numba/core/typing/builtins.py:991
for i, q in enumerate(data[start:], start):
# TODO: ask numba why this doesn't work..
# open, high, low, close, index = q[
# ['open', 'high', 'low', 'close', 'index']]
open = q['open']
high = q['high']
low = q['low']
close = q['close']
index = float64(q['index'])
istart = i * 6
istop = istart + 6
# x,y detail the 6 points which connect all vertexes of a ohlc bar
x[istart:istop] = (
index - bar_gap,
index,
index,
index,
index,
index + bar_gap,
)
y[istart:istop] = (
open,
open,
low,
high,
close,
close,
)
# specifies that the first edge is never connected to the
# prior bars last edge thus providing a small "gap"/"space"
# between bars determined by ``bar_gap``.
c[istart:istop] = (1, 1, 1, 1, 1, 0)
return x, y, c
def gen_ohlc_qpath(
r: Renderer,
data: np.ndarray,
array_key: str, # we ignore this
vr: tuple[int, int],
start: int = 0, # XXX: do we need this?
# 0.5 is no overlap between arms, 1.0 is full overlap
w: float = 0.43,
) -> QtGui.QPainterPath:
'''
More or less direct proxy to ``path_arrays_from_ohlc()``
but with closed in kwargs for line spacing.
'''
x, y, c = path_arrays_from_ohlc(
data,
start,
bar_gap=w,
)
return x, y, c
def ohlc_to_line(
ohlc_shm: ShmArray,
data_field: str,
fields: list[str] = ['open', 'high', 'low', 'close']
) -> tuple[
np.ndarray,
np.ndarray,
]:
'''
Convert an input struct-array holding OHLC samples into a pair of
flattened x, y arrays with the same size (datums wise) as the source
data.
'''
y_out = ohlc_shm.ustruct(fields)
first = ohlc_shm._first.value
last = ohlc_shm._last.value
# write pushed data to flattened copy
y_out[first:last] = rfn.structured_to_unstructured(
ohlc_shm.array[fields]
)
# generate an flat-interpolated x-domain
x_out = (
np.broadcast_to(
ohlc_shm._array['index'][:, None],
(
ohlc_shm._array.size,
# 4, # only ohlc
y_out.shape[1],
),
) + np.array([-0.5, 0, 0, 0.5])
)
assert y_out.any()
return (
x_out,
y_out,
)
def to_step_format(
shm: ShmArray,
data_field: str,
index_field: str = 'index',
) -> tuple[int, np.ndarray, np.ndarray]:
'''
Convert an input 1d shm array to a "step array" format
for use by path graphics generation.
'''
i = shm._array['index'].copy()
out = shm._array[data_field].copy()
x_out = np.broadcast_to(
i[:, None],
(i.size, 2),
) + np.array([-0.5, 0.5])
y_out = np.empty((len(out), 2), dtype=out.dtype)
y_out[:] = out[:, np.newaxis]
# start y at origin level
y_out[0, 0] = 0
return x_out, y_out

4
piker/ui/order_mode.py
View File

@ -873,7 +873,9 @@ async def process_trades_and_update_ui(
mode.lines.remove_line(uuid=oid)
# each clearing tick is responded individually
elif resp in ('broker_filled',):
elif resp in (
'broker_filled',
):
known_order = book._sent_orders.get(oid)
if not known_order: