As you can see, my code is very simple, it only calls QLineSeries.replace(QPolygonF) periodically.
But when the code executes, memory the application used keeps on increasing.
import sys
from PyQt5.QtCore import QTimer
from PyQt5.QtGui import QPolygonF
from PyQt5.QtWidgets import QApplication, QMainWindow
from PyQt5.QtChart import QChart, QChartView, QLineSeries
class DemoWindow(QMainWindow):
def __init__(self, parent=None):
super(DemoWindow, self).__init__(parent=parent)
self.plotChart = QChart()
self.plotChart.legend().hide()
self.plotView = QChartView(self.plotChart)
self.setCentralWidget(self.plotView)
self.plotCurve = QLineSeries()
self.plotChart.addSeries(self.plotCurve)
self.plotChart.createDefaultAxes()
self.polyline = QPolygonF(1000)
self.tmrPlot = QTimer()
self.tmrPlot.setInterval(100)
self.tmrPlot.timeout.connect(self.on_tmrPlot_timeout)
self.tmrPlot.start()
def on_tmrPlot_timeout(self):
self.plotCurve.replace(self.polyline)
if __name__ == '__main__':
app = QApplication(sys.argv)
win = DemoWindow()
win.show()
sys.exit(app.exec_())
