Rejig order line creation / config
In an effort to simplify line creation and management from an order mode here's a slew of changes: - use our new ``LevelMarker`` for order lines and fully drop usage of the original marker implementation stuff from `pg.InfiniteLine` - add a left side label which shows the instrument's "units" value - the most fundamental unit for the "size" of the order - allow passing in an optional `marker_size: str` so that `action: str` doesn't necessarily have to be passed (eg. when copying from an existing line) - change a couple of internal line config options to be public attrs which can now be configured dynamically in real-time (since they're all `bool` anyway): * `hl_on_hover` -> `highlight_on_hover` * `_always_show_labels` -> `always_show_labels` - `LevelLine.set_level()` now only sets the position if it was **not** called from the position changed signal (which would be redundant)fsp_feeds
Tyler Goodlet
parent
c37ce664f5
commit
92d6b19777
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@ -18,22 +18,20 @@
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Lines for orders, alerts, L2.
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"""
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from functools import partial
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from math import floor
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from typing import Tuple, Optional, List
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from typing import Tuple, Optional, List, Callable
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import pyqtgraph as pg
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from pyqtgraph import Point, functions as fn
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from PyQt5 import QtCore, QtGui, QtWidgets
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from PyQt5.QtCore import QPointF
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from PyQt5.QtGui import QGraphicsPathItem
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from ._annotate import mk_marker_path, qgo_draw_markers
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from ._annotate import qgo_draw_markers, LevelMarker
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from ._anchors import (
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marker_right_points,
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vbr_left,
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right_axis,
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gpath_pin,
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# gpath_pin,
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)
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from ._label import Label
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from ._style import hcolor, _font
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@ -52,15 +50,13 @@ class LevelLine(pg.InfiniteLine):
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color: str = 'default',
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highlight_color: str = 'default_light',
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dotted: bool = False,
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# marker_size: int = 20,
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# UX look and feel opts
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always_show_labels: bool = False,
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hl_on_hover: bool = True,
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highlight_on_hover: bool = True,
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hide_xhair_on_hover: bool = True,
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only_show_markers_on_hover: bool = True,
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use_marker_margin: bool = False,
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movable: bool = True,
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) -> None:
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@ -77,7 +73,7 @@ class LevelLine(pg.InfiniteLine):
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)
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self._chart = chart
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self._hoh = hl_on_hover
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self.highlight_on_hover = highlight_on_hover
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self._dotted = dotted
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self._hide_xhair_on_hover = hide_xhair_on_hover
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@ -117,7 +113,7 @@ class LevelLine(pg.InfiniteLine):
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# TODO: for when we want to move groups of lines?
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self._track_cursor: bool = False
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self._always_show_labels = always_show_labels
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self.always_show_labels = always_show_labels
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self._on_drag_start = lambda l: None
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self._on_drag_end = lambda l: None
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@ -156,7 +152,9 @@ class LevelLine(pg.InfiniteLine):
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"""Position changed handler.
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"""
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self.update_labels({'level': self.value()})
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level = self.value()
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self.update_labels({'level': level})
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self.set_level(level, called_from_on_pos_change=True)
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def update_labels(
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self,
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@ -190,8 +188,11 @@ class LevelLine(pg.InfiniteLine):
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def set_level(
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self,
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level: float,
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called_from_on_pos_change: bool = False,
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) -> None:
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if not called_from_on_pos_change:
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last = self.value()
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# if the position hasn't changed then ``.update_labels()``
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@ -203,6 +204,7 @@ class LevelLine(pg.InfiniteLine):
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self.update_labels({'level': level})
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self.setPos(level)
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self.level = self.value()
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self.update()
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@ -453,7 +455,7 @@ class LevelLine(pg.InfiniteLine):
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self._marker.show()
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# highlight if so configured
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if self._hoh:
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if self.highlight_on_hover:
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self.currentPen = self.hoverPen
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@ -502,7 +504,7 @@ class LevelLine(pg.InfiniteLine):
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if self not in cur._trackers:
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cur.show_xhair(y_label_level=self.value())
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if not self._always_show_labels:
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if not self.always_show_labels:
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for label in self._labels:
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label.hide()
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label.txt.update()
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@ -514,6 +516,7 @@ class LevelLine(pg.InfiniteLine):
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def level_line(
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chart: 'ChartPlotWidget', # noqa
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level: float,
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@ -522,7 +525,7 @@ def level_line(
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color: str = 'default',
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# ux
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hl_on_hover: bool = True,
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highlight_on_hover: bool = True,
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# label fields and options
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always_show_labels: bool = False,
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@ -534,7 +537,7 @@ def level_line(
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"""Convenience routine to add a styled horizontal line to a plot.
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"""
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hl_color = color + '_light' if hl_on_hover else color
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hl_color = color + '_light' if highlight_on_hover else color
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line = LevelLine(
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chart,
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@ -546,7 +549,7 @@ def level_line(
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dotted=dotted,
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# UX related options
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hl_on_hover=hl_on_hover,
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highlight_on_hover=highlight_on_hover,
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# when set to True the label is always shown instead of just on
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# highlight (which is a privacy thing for orders)
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@ -599,15 +602,14 @@ def order_line(
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chart,
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level: float,
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level_digits: float,
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action: str, # buy or sell
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marker_style: Optional[str] = None,
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level_digits: Optional[float] = 3,
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size: Optional[int] = 1,
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size_digits: int = 1,
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show_markers: bool = False,
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submit_price: float = None,
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exec_type: str = 'dark',
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order_type: str = 'limit',
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orient_v: str = 'bottom',
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**line_kwargs,
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@ -626,18 +628,72 @@ def order_line(
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**line_kwargs
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)
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if show_markers:
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font_size = _font.font.pixelSize()
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# scale marker size with dpi-aware font size
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arrow_size = floor(1.375 * font_size)
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alert_size = arrow_size * 0.666
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marker_size = floor(1.375 * font_size)
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orient_v = 'top' if action == 'sell' else 'bottom'
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if action == 'alert':
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label = Label(
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view=line.getViewBox(),
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color=line.color,
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# completely different labelling for alerts
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fmt_str='alert => {level}',
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)
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# for now, we're just duplicating the label contents i guess..
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line._labels.append(label)
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# anchor to left side of view / line
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label.set_x_anchor_func(vbr_left(label))
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label.fields = {
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'level': level,
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'level_digits': level_digits,
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}
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marker_size = marker_size * 0.666
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else:
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# pp_label.scene_anchor = partial(
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# gpath_pin,
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# location_description='right-of-path-centered',
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# gpath=marker,
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# label=label,
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# )
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label = Label(
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view=line.getViewBox(),
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# display the order pos size, which is some multiple
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# of the user defined base unit size
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fmt_str=('units: {size:.{size_digits}f}'), # old
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color=line.color,
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)
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label.set_x_anchor_func(vbr_left(label))
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line._labels.append(label)
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label.fields = {
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'size': size,
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'size_digits': 0,
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}
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label.orient_v = orient_v
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label.render()
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label.show()
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if show_markers:
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# add arrow marker on end of line nearest y-axis
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marker_style, marker_size = {
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'buy': ('|<', arrow_size),
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'sell': ('>|', arrow_size),
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'alert': ('v', alert_size),
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marker_style = marker_style or {
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'buy': '|<',
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'sell': '>|',
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'alert': 'v',
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}[action]
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# this fixes it the artifact issue! .. of course, bounding rect stuff
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@ -648,18 +704,27 @@ def order_line(
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# resetting the graphics item transform intermittently
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# the old way which is still somehow faster?
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marker = QGraphicsPathItem(
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mk_marker_path(
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marker_style,
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# the "position" here is now ignored since we modified
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# internals to pin markers to the right end of the line
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# marker_size,
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marker = LevelMarker(
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chart=chart,
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style=marker_style,
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get_level=line.value,
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size=marker_size,
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keep_in_view=False,
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# on_paint=self.update_graphics,
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)
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# uncommment for the old transform / .paint() marker method
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# use_qgpath=False,
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)
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)
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marker.scale(marker_size, marker_size)
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# marker = QGraphicsPathItem(
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# mk_marker_path(
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# marker_style,
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# # the "position" here is now ignored since we modified
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# # internals to pin markers to the right end of the line
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# # marker_size,
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# # uncommment for the old transform / .paint() marker method
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# # use_qgpath=False,
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# )
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# )
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# marker.scale(marker_size, marker_size)
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# XXX: this is our new approach but seems slower?
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marker = line.add_marker(marker)
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@ -677,65 +742,7 @@ def order_line(
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# # testing to figure out why tf that's true.
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# line.markers.append((marker, 0, marker_size))
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orient_v = 'top' if action == 'sell' else 'bottom'
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if action == 'alert':
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llabel = Label(
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view=line.getViewBox(),
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color=line.color,
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# completely different labelling for alerts
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fmt_str='alert => {level}',
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)
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# for now, we're just duplicating the label contents i guess..
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line._labels.append(llabel)
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# anchor to left side of view / line
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llabel.set_x_anchor_func(vbr_left(llabel))
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llabel.fields = {
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'level': level,
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'level_digits': level_digits,
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}
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llabel.orient_v = orient_v
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llabel.render()
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llabel.show()
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marker.label = llabel
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else:
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rlabel = Label(
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view=line.getViewBox(),
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# display the order pos size, which is some multiple
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# of the user defined base unit size
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fmt_str=('{size:.{size_digits}f}'), # old
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color=line.color,
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)
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marker.label = rlabel
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rlabel.scene_anchor = partial(
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gpath_pin,
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location_description='right-of-path-centered',
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gpath=marker,
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label=rlabel,
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)
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line._labels.append(rlabel)
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rlabel.fields = {
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'size': size,
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'size_digits': 0,
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}
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rlabel.orient_v = orient_v
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rlabel.render()
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rlabel.show()
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marker.label = label
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# sanity check
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line.update_labels({'level': level})
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