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Use an ordered dict to get LIFO cache sorting on sym selection

symbol_search
Tyler Goodlet 2021-05-24 13:13:22 -04:00
parent 9bfc230dde
commit af9dcf9230
1 changed files with 7 additions and 3 deletions
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10
piker/ui/_chart.py
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@ -19,10 +19,11 @@ High level Qt chart widgets.
""" """
import time import time
from collections import OrderedDict
from contextlib import AsyncExitStack
from typing import Tuple, Dict, Any, Optional, Callable from typing import Tuple, Dict, Any, Optional, Callable
from types import ModuleType from types import ModuleType
from functools import partial from functools import partial
from contextlib import AsyncExitStack
from PyQt5 import QtCore, QtGui from PyQt5 import QtCore, QtGui
from PyQt5.QtCore import Qt from PyQt5.QtCore import Qt
@ -104,7 +105,7 @@ class ChartSpace(QtGui.QWidget):
self.vbox.addLayout(self.toolbar_layout) self.vbox.addLayout(self.toolbar_layout)
# self.vbox.addLayout(self.hbox) # self.vbox.addLayout(self.hbox)
self._chart_cache = {} self._chart_cache = OrderedDict()
self.linkedcharts: 'LinkedSplitCharts' = None self.linkedcharts: 'LinkedSplitCharts' = None
self.symbol_label: Optional[QtGui.QLabel] = None self.symbol_label: Optional[QtGui.QLabel] = None
@ -116,6 +117,8 @@ class ChartSpace(QtGui.QWidget):
linked_charts: 'LinkedSplitCharts', # type: ignore linked_charts: 'LinkedSplitCharts', # type: ignore
) -> None: ) -> None:
self._chart_cache[symbol_key] = linked_charts self._chart_cache[symbol_key] = linked_charts
# re-sort list in LIFO order
self._chart_cache.move_to_end(symbol_key, last=False)
def get_chart_symbol( def get_chart_symbol(
self, self,
@ -191,7 +194,8 @@ class ChartSpace(QtGui.QWidget):
) )
self.vbox.addWidget(linkedcharts) self.vbox.addWidget(linkedcharts)
self.set_chart_symbol(fqsn, linkedcharts)
self.set_chart_symbol(fqsn, linkedcharts)
# chart is already in memory so just focus it # chart is already in memory so just focus it
if self.linkedcharts: if self.linkedcharts: