First draft: symbol switching via QLineEdit widget
Tyler Goodlet
parent
27aed85404
commit
0627f7dcee
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@ -24,6 +24,8 @@ from types import ModuleType
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from functools import partial
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from PyQt5 import QtCore, QtGui
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from PyQt5.QtCore import Qt
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from PyQt5 import QtWidgets
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import numpy as np
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import pyqtgraph as pg
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import tractor
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@ -48,6 +50,7 @@ from ._graphics._ohlc import BarItems
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from ._graphics._curve import FastAppendCurve
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from ._style import (
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_font,
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DpiAwareFont,
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hcolor,
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CHART_MARGINS,
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_xaxis_at,
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@ -70,6 +73,99 @@ from .. import fsp
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log = get_logger(__name__)
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class FontSizedQLineEdit(QtWidgets.QLineEdit):
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def __init__(
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self,
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parent_chart: 'ChartSpace',
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font: DpiAwareFont = _font,
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) -> None:
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super().__init__(parent_chart)
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self.dpi_font = font
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self.chart_app = parent_chart
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# size it as we specify
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self.setSizePolicy(
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QtWidgets.QSizePolicy.Fixed,
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QtWidgets.QSizePolicy.Fixed,
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)
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self.setFont(font.font)
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# witty bit of margin
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self.setTextMargins(2, 2, 2, 2)
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def sizeHint(self) -> QtCore.QSize:
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psh = super().sizeHint()
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psh.setHeight(self.dpi_font.px_size + 2)
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return psh
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def unfocus(self) -> None:
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self.hide()
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self.clearFocus()
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def keyPressEvent(self, ev: QtCore.QEvent) -> None:
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# by default we don't markt it as consumed?
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# ev.ignore()
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super().keyPressEvent(ev)
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ev.accept()
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# text = ev.text()
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key = ev.key()
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mods = ev.modifiers()
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ctrl = False
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if mods == QtCore.Qt.ControlModifier:
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ctrl = True
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if ctrl:
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if key == QtCore.Qt.Key_C:
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self.unfocus()
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self.chart_app.linkedcharts.focus()
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# TODO:
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elif key == QtCore.Qt.Key_K:
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print('move up')
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elif key == QtCore.Qt.Key_J:
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print('move down')
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elif key in (QtCore.Qt.Key_Enter, QtCore.Qt.Key_Return):
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print(f'Requesting symbol: {self.text()}')
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symbol = self.text()
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app = self.chart_app
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self.chart_app.load_symbol(
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app.linkedcharts.symbol.brokers[0],
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symbol,
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'info',
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)
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# self.hide()
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self.unfocus()
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# if self._executing():
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# # ignore all key presses while executing, except for Ctrl-C
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# if event.modifiers() == Qt.ControlModifier and key == Qt.Key_C:
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# self._handle_ctrl_c()
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# return True
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# handler = self._key_event_handlers.get(key)
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# intercepted = handler and handler(event)
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# Assumes that Control+Key is a movement command, i.e. should not be
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# handled as text insertion. However, on win10 AltGr is reported as
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# Alt+Control which is why we handle this case like regular
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# # keypresses, see #53:
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# if not event.modifiers() & Qt.ControlModifier or \
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# event.modifiers() & Qt.AltModifier:
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# self._keep_cursor_in_buffer()
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# if not intercepted and event.text():
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# intercepted = True
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# self.insert_input_text(event.text())
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# return False
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class ChartSpace(QtGui.QWidget):
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"""High level widget which contains layouts for organizing
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lower level charts as well as other widgets used to control
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@ -80,7 +176,7 @@ class ChartSpace(QtGui.QWidget):
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self.v_layout = QtGui.QVBoxLayout(self)
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self.v_layout.setContentsMargins(0, 0, 0, 0)
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self.v_layout.setSpacing(0)
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self.v_layout.setSpacing(1)
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self.toolbar_layout = QtGui.QHBoxLayout()
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self.toolbar_layout.setContentsMargins(0, 0, 0, 0)
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@ -93,21 +189,18 @@ class ChartSpace(QtGui.QWidget):
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self.v_layout.addLayout(self.toolbar_layout)
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self.v_layout.addLayout(self.h_layout)
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self._chart_cache = {}
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self.linkedcharts: 'LinkedSplitCharts' = None
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self.symbol_label: Optional[QtGui.QLabel] = None
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def init_search(self):
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self.symbol_label = label = QtGui.QLabel()
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label.setTextFormat(3) # markdown
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label.setFont(_font.font)
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label.setMargin(0)
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# title = f'sym: {self.symbol}'
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# label.setText(title)
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self._root_n: Optional[trio.Nursery] = None
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label.setAlignment(
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QtCore.Qt.AlignVCenter
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| QtCore.Qt.AlignLeft
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)
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self.v_layout.addWidget(label)
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def open_search(self):
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# search = self.search = QtWidgets.QLineEdit()
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self.search = FontSizedQLineEdit(self)
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self.search.unfocus()
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self.v_layout.addWidget(self.search)
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# search.installEventFilter(self)
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def init_timeframes_ui(self):
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self.tf_layout = QtGui.QHBoxLayout()
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@ -130,38 +223,59 @@ class ChartSpace(QtGui.QWidget):
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# def init_strategy_ui(self):
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# self.strategy_box = StrategyBoxWidget(self)
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# self.toolbar_layout.addWidget(self.strategy_box)
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def load_symbol(
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self,
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brokername: str,
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symbol_key: str,
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data: np.ndarray,
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loglevel: str,
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ohlc: bool = True,
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reset: bool = False,
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) -> None:
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"""Load a new contract into the charting app.
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Expects a ``numpy`` structured array containing all the ohlcv fields.
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"""
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# TODO: symbol search
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# # of course this doesn't work :eyeroll:
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# h = _font.boundingRect('Ag').height()
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# print(f'HEIGHT {h}')
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# self.symbol_label.setFixedHeight(h + 4)
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# self.v_layout.update()
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# self.symbol_label.setText(f'/`{symbol}`')
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linkedcharts = self._chart_cache.setdefault(
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symbol_key,
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LinkedSplitCharts(self)
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)
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self.linkedcharts = linkedcharts
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"""
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linkedcharts = self._chart_cache.get(symbol_key)
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# switching to a new viewable chart
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if not self.v_layout.isEmpty():
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# and not (
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# self.linkedcharts is linkedcharts
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# ):
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# XXX: this is CRITICAL especially with pixel buffer caching
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self.linkedcharts.hide()
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# remove any existing plots
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if not self.v_layout.isEmpty():
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self.v_layout.removeWidget(linkedcharts)
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self.v_layout.removeWidget(self.linkedcharts)
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if linkedcharts is None or reset:
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# we must load a fresh linked charts set
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linkedcharts = LinkedSplitCharts(self)
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self._root_n.start_soon(
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chart_symbol,
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self,
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brokername,
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symbol_key,
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loglevel,
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)
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self.v_layout.addWidget(linkedcharts)
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return linkedcharts
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# if linkedcharts.chart:
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# breakpoint()
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# else:
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# chart is already in memory so just focus it
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if self.linkedcharts:
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self.linkedcharts.unfocus()
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# self.v_layout.addWidget(linkedcharts)
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self.linkedcharts = linkedcharts
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linkedcharts.focus()
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# return linkedcharts
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# TODO: add signalling painter system
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# def add_signals(self):
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@ -184,8 +298,10 @@ class LinkedSplitCharts(QtGui.QWidget):
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zoomIsDisabled = QtCore.pyqtSignal(bool)
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def __init__(
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self,
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chart_space: ChartSpace,
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) -> None:
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super().__init__()
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self.signals_visible: bool = False
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@ -194,6 +310,8 @@ class LinkedSplitCharts(QtGui.QWidget):
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self.subplots: Dict[Tuple[str, ...], ChartPlotWidget] = {}
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self.chart_space = chart_space
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self.chart_space = chart_space
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self.xaxis = DynamicDateAxis(
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orientation='bottom',
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linked_charts=self
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@ -232,6 +350,14 @@ class LinkedSplitCharts(QtGui.QWidget):
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sizes.extend([min_h_ind] * len(self.subplots))
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self.splitter.setSizes(sizes) # , int(self.height()*0.2)
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def focus(self) -> None:
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if self.chart is not None:
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self.chart.setFocus()
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def unfocus(self) -> None:
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if self.chart is not None:
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self.chart.clearFocus()
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def plot_ohlc_main(
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self,
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symbol: Symbol,
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@ -1159,7 +1285,7 @@ async def spawn_fsps(
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# XXX: fsp may have been opened by a duplicate chart. Error for
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# now until we figure out how to wrap fsps as "feeds".
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assert opened, f"A chart for {key} likely already exists?"
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# assert opened, f"A chart for {key} likely already exists?"
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conf['shm'] = shm
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@ -1253,6 +1379,8 @@ async def run_fsp(
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# fsp_func_name
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)
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chart._lc.focus()
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# read last value
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array = shm.array
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value = array[fsp_func_name][-1]
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@ -1261,7 +1389,6 @@ async def run_fsp(
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last_val_sticky.update_from_data(-1, value)
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chart.update_curve_from_array(fsp_func_name, array)
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chart._shm = shm
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# TODO: figure out if we can roll our own `FillToThreshold` to
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@ -1387,14 +1514,7 @@ async def chart_symbol(
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brokername: str,
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sym: str,
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loglevel: str,
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task_status: TaskStatus[Symbol] = trio.TASK_STATUS_IGNORED,
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) -> None:
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"""Spawn a real-time chart widget for this symbol and app session.
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These widgets can remain up but hidden so that multiple symbols
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can be viewed and switched between extremely fast.
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"""
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# historical data fetch
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brokermod = brokers.get_brokermod(brokername)
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@ -1404,24 +1524,21 @@ async def chart_symbol(
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loglevel=loglevel,
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) as feed:
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ohlcv: ShmArray = feed.shm
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ohlcv = feed.shm
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bars = ohlcv.array
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symbol = feed.symbols[sym]
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task_status.started(symbol)
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# load in symbol's ohlc data
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chart_app.window.setWindowTitle(
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f'{symbol.key}@{symbol.brokers} '
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f'tick:{symbol.tick_size}'
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)
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# await tractor.breakpoint()
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linked_charts = chart_app.linkedcharts
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linked_charts._symbol = symbol
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chart = linked_charts.plot_ohlc_main(symbol, bars)
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chart.setFocus()
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linked_charts.focus()
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# plot historical vwap if available
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wap_in_history = False
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@ -1494,6 +1611,9 @@ async def chart_symbol(
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wap_in_history,
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)
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# await tractor.breakpoint()
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# chart_app.linkedcharts.focus()
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# wait for a first quote before we start any update tasks
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quote = await feed.receive()
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@ -1514,7 +1634,7 @@ async def chart_symbol(
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# chart,
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# linked_charts,
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# )
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chart_app.linkedcharts.focus()
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await start_order_mode(chart, symbol, brokername)
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@ -1522,7 +1642,7 @@ async def _async_main(
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# implicit required argument provided by ``qtractor_run()``
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widgets: Dict[str, Any],
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symbol_key: str,
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sym: str,
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brokername: str,
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loglevel: str,
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@ -1550,29 +1670,24 @@ async def _async_main(
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# configure global DPI aware font size
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_font.configure_to_dpi(screen)
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# try:
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async with trio.open_nursery() as root_n:
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# set root nursery for spawning other charts/feeds
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# that run cached in the bg
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chart_app._root_n = root_n
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chart_app.load_symbol(brokername, symbol_key, loglevel)
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# TODO: trigger on ctlr-k
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chart_app.open_search()
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symbol = await root_n.start(
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chart_symbol,
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chart_app,
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brokername,
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symbol_key,
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loglevel,
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)
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chart_app.window.setWindowTitle(
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f'{symbol.key}@{symbol.brokers} '
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f'tick:{symbol.tick_size}'
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)
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# this internally starts a ``chart_symbol()`` task above
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chart_app.load_symbol(brokername, sym, loglevel)
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await trio.sleep_forever()
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# finally:
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# root_n.cancel()
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def _main(
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sym: str,
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@ -486,6 +486,8 @@ class ChartView(ViewBox):
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self._key_buffer = []
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self._key_active: bool = False
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self.setFocusPolicy(QtCore.Qt.StrongFocus)
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@property
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def chart(self) -> 'ChartPlotWidget': # type: ignore # noqa
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return self._chart
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@ -757,6 +759,12 @@ class ChartView(ViewBox):
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if mods == QtCore.Qt.AltModifier:
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pass
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# ctlr-k
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if key == QtCore.Qt.Key_K and ctrl:
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search = self._chart._lc.chart_space.search
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search.show()
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search.setFocus()
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# esc
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if key == QtCore.Qt.Key_Escape or (ctrl and key == QtCore.Qt.Key_C):
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# ctrl-c as cancel
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