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Add a "lines editor" api/component

basic_alerts
Tyler Goodlet 2021-01-05 13:37:03 -05:00
parent 268f207a6c
commit 8d66a17daf
3 changed files with 161 additions and 96 deletions
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14
piker/_ems.py
View File

@ -1,5 +1,5 @@
# piker: trading gear for hackers
# Copyright (C) 2018-present Tyler Goodlet (in stewardship for piker0)
# Copyright (C) Tyler Goodlet (in stewardship for 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
@ -47,8 +47,8 @@ _local_book = {}
@dataclass
class OrderBook:
"""Send (client?) side order book tracking.
class OrderBoi:
"""'Buy' (client ?) side order book ctl and tracking.
Mostly for keeping local state to match the EMS and use
events to trigger graphics updates.
@ -73,14 +73,14 @@ class OrderBook:
...
_orders: OrderBook = None
_orders: OrderBoi = None
def get_orders() -> OrderBook:
def get_orders() -> OrderBoi:
global _orders
if _orders is None:
_orders = OrderBook
_orders = OrderBoi
return _orders
@ -392,6 +392,8 @@ async def spawn_router_stream_alerts(
oid = alert['oid']
print(f'_lines: {_lines}')
print(f'deleting line with oid: {oid}')
chart._vb._lines_editor
_lines.pop(oid).delete()
# TODO: this in another task?

20
piker/ui/_graphics/_lines.py
View File

@ -18,6 +18,7 @@
Lines for orders, alerts, L2.
"""
from dataclasses import dataclass
from typing import Tuple
import pyqtgraph as pg
@ -87,10 +88,11 @@ class LevelLabel(YSticky):
self.level = level
def set_label_str(self, level: float):
# this is read inside ``.paint()``
# self.label_str = '{size} x {level:.{digits}f}'.format(
self.label_str = '{level:.{digits}f}'.format(
# size=self._size,
# this is read inside ``.paint()``
self.label_str = '{level:.{digits}f}'.format(
digits=self.digits,
level=level
).replace(',', ' ')
@ -200,14 +202,16 @@ class LevelLine(pg.InfiniteLine):
chart: 'ChartPlotWidget', # type: ignore # noqa
label: LevelLabel,
highlight_color: str = 'default_light',
hl_on_hover: bool = True,
**kwargs,
) -> None:
self.label = label
super().__init__(**kwargs)
self.label = label
self.sigPositionChanged.connect(self.set_level)
self._chart = chart
self._hoh = hl_on_hover
# use slightly thicker highlight
pen = pg.mkPen(hcolor(highlight_color))
@ -231,7 +235,8 @@ class LevelLine(pg.InfiniteLine):
"""Mouse hover callback.
"""
if self.mouseHovering == hover:
# XXX: currently we'll just return if _hoh is False
if self.mouseHovering == hover or not self._hoh:
return
self.mouseHovering = hover
@ -315,6 +320,10 @@ def level_line(
show_label: bool = True,
# whether or not the line placed in view should highlight
# when moused over (aka "hovered")
hl_on_hover: bool = True,
**linelabelkwargs
) -> LevelLine:
"""Convenience routine to add a styled horizontal line to a plot.
@ -346,6 +355,7 @@ def level_line(
highlight_color=color + '_light',
movable=True,
angle=0,
hl_on_hover=hl_on_hover,
)
line.setValue(level)
line.setPen(pg.mkPen(hcolor(color)))

223
piker/ui/_interaction.py
View File

@ -1,5 +1,5 @@
# piker: trading gear for hackers
# Copyright (C) 2018-present Tyler Goodlet (in stewardship of piker0)
# Copyright (C) Tyler Goodlet (in stewardship for 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
@ -17,7 +17,7 @@
"""
UX interaction customs.
"""
from dataclasses import dataclass
from dataclasses import dataclass, field
from typing import Optional
import uuid
@ -28,7 +28,7 @@ import numpy as np
from ..log import get_logger
from ._style import _min_points_to_show, hcolor, _font
from ._graphics._lines import level_line
from ._graphics._lines import level_line, LevelLine
from .._ems import _lines
@ -199,19 +199,133 @@ class SelectRect(QtGui.QGraphicsRectItem):
@dataclass
class LinesEditor:
class LineEditor:
view: 'ChartView'
chart: 'ChartPlotWidget'
active_line: 'LevelLine'
_lines: field(default_factory=dict)
chart: 'ChartPlotWidget' = None # type: ignore # noqa
_active_staged_line: LevelLine = None
_stage_line: LevelLine = None
def stage_line(self) -> 'LevelLine':
...
def stage_line(self, color: str = 'alert_yellow') -> LevelLine:
"""Stage a line at the current chart's cursor position
and return it.
def commit_line(self) -> 'LevelLine':
...
"""
chart = self.chart._cursor.active_plot
chart.setCursor(QtCore.Qt.PointingHandCursor)
cursor = chart._cursor
y = chart._cursor._datum_xy[1]
def remove_line(self, line) -> None:
...
line = self._stage_line
if not line:
# add a "staged" cursor-tracking line to view
# and cash it in a a var
line = level_line(
chart,
level=y,
color=color,
# don't highlight the "staging" line
hl_on_hover=False,
)
self._stage_line = line
else:
# use the existing staged line instead
# of allocating more mem / objects repeatedly
line.setValue(y)
line.show()
line.label.show()
self._active_staged_line = line
# hide crosshair y-line
cursor.graphics[chart]['hl'].hide()
# add line to cursor trackers
cursor._trackers.add(line)
return line
def unstage_line(self) -> LevelLine:
"""Inverse of ``.stage_line()``.
"""
chart = self.chart._cursor.active_plot
chart.setCursor(QtCore.Qt.ArrowCursor)
cursor = chart._cursor
# delete "staged" cursor tracking line from view
line = self._active_staged_line
cursor._trackers.remove(line)
if self._stage_line:
self._stage_line.hide()
self._stage_line.label.hide()
# if line:
# line.delete()
self._active_staged_line = None
# show the crosshair y line
hl = cursor.graphics[chart]['hl']
hl.show()
def commit_line(self) -> LevelLine:
line = self._active_staged_line
if line:
chart = self.chart._cursor.active_plot
y = chart._cursor._datum_xy[1]
# XXX: should make this an explicit attr
# it's assigned inside ``.add_plot()``
lc = self.view.linked_charts
oid = str(uuid.uuid4())
lc._to_router.send_nowait({
'chart': lc,
'type': 'alert',
'price': y,
'oid': oid,
# 'symbol': lc.chart.name,
# 'brokers': lc.symbol.brokers,
# 'price': y,
})
line = level_line(
chart,
level=y,
color='alert_yellow',
)
# register for later
_lines[oid] = line
log.debug(f'clicked y: {y}')
def remove_line(
self,
line: LevelLine = None,
uuid: str = None,
) -> None:
"""Remove a line by refernce or uuid.
If no lines or ids are provided remove all lines under the
cursor position.
"""
# Delete any hoverable under the cursor
cursor = self.chart._cursor
if line:
line.delete()
else:
for item in cursor._hovered:
# hovered items must also offer
# a ``.delete()`` method
item.delete()
class ChartView(ViewBox):
@ -236,8 +350,9 @@ class ChartView(ViewBox):
self.addItem(self.select_box, ignoreBounds=True)
self._chart: 'ChartPlotWidget' = None # noqa
self._lines_editor = LineEditor(view=self, _lines=_lines)
self._key_buffer = []
self._active_staged_line: 'LevelLine' = None # noqa
self._active_staged_line: LevelLine = None # noqa
@property
def chart(self) -> 'ChartPlotWidget': # type: ignore # noqa
@ -247,6 +362,7 @@ class ChartView(ViewBox):
def chart(self, chart: 'ChartPlotWidget') -> None: # type: ignore # noqa
self._chart = chart
self.select_box.chart = chart
self._lines_editor.chart = chart
def wheelEvent(self, ev, axis=None):
"""Override "center-point" location for scrolling.
@ -407,7 +523,7 @@ class ChartView(ViewBox):
"""
button = ev.button()
pos = ev.pos()
# pos = ev.pos()
if button == QtCore.Qt.RightButton and self.menuEnabled():
ev.accept()
@ -417,33 +533,8 @@ class ChartView(ViewBox):
ev.accept()
line = self._active_staged_line
if line:
chart = self.chart._cursor.active_plot
y = chart._cursor._datum_xy[1]
# XXX: should make this an explicit attr
# it's assigned inside ``.add_plot()``
lc = self.linked_charts
oid = str(uuid.uuid4())
lc._to_router.send_nowait({
'chart': lc,
'type': 'alert',
'price': y,
'oid': oid,
# 'symbol': lc.chart.name,
# 'brokers': lc.symbol.brokers,
# 'price': y,
})
line = level_line(
chart,
level=y,
color='alert_yellow',
)
_lines[oid] = line
log.info(f'clicked {pos}')
# commit the "staged" line under the cursor
self._lines_editor.commit_line()
def keyReleaseEvent(self, ev):
"""
@ -465,23 +556,8 @@ class ChartView(ViewBox):
self.setMouseMode(ViewBox.PanMode)
if text == 'a':
chart = self.chart._cursor.active_plot
chart.setCursor(QtCore.Qt.ArrowCursor)
cursor = chart._cursor
# delete "staged" cursor tracking line from view
line = self._active_staged_line
cursor._trackers.remove(line)
if line:
line.delete()
self._active_staged_line = None
# show the crosshair y line
hl = cursor.graphics[chart]['hl']
hl.show()
# draw "staged" line under cursor position
self._lines_editor.unstage_line()
def keyPressEvent(self, ev):
"""
@ -526,35 +602,12 @@ class ChartView(ViewBox):
self.chart.default_view()
elif text == 'a':
chart = self.chart._cursor.active_plot
chart.setCursor(QtCore.Qt.PointingHandCursor)
cursor = chart._cursor
# add a "staged" cursor-tracking alert line
line = level_line(
chart,
level=chart._cursor._datum_xy[1],
color='alert_yellow',
)
self._active_staged_line = line
# hide crosshair y-line
cursor.graphics[chart]['hl'].hide()
# add line to cursor trackers
cursor._trackers.add(line)
# add a line at the current cursor
self._lines_editor.stage_line()
elif text == 'd':
# Delete any hoverable under the cursor
cursor = self.chart._cursor
chart = cursor.active_plot
for item in cursor._hovered:
# hovered items must also offer
# a ``.delete()`` method
item.delete()
# delete any lines under the cursor
self._lines_editor.remove_line()
# Leaving this for light reference purposes