代码拉取完成,页面将自动刷新
#!/usr/bin/env python
# -*- coding: utf-8 -*-
"""
Created on 2021/5/13
@author: Irony
@site: https://pyqt.site , https://github.com/PyQt5
@email: 892768447@qq.com
@file: CpuLineChart
@description:
"""
import sys
from PyQt5.QtChart import QChartView, QChart, QSplineSeries, QDateTimeAxis, QValueAxis
from PyQt5.QtCore import Qt, QTimer, QDateTime, QPointF
from PyQt5.QtGui import QPainter, QPen, QColor
from PyQt5.QtWidgets import QApplication
from psutil import cpu_percent
class CpuLineChart(QChart):
def __init__(self, *args, **kwargs):
super(CpuLineChart, self).__init__(*args, **kwargs)
self.m_count = 10
# 隐藏图例
self.legend().hide()
self.m_series = QSplineSeries(self)
# 设置画笔
self.m_series.setPen(QPen(QColor('#3B8CFF'), 2, Qt.SolidLine, Qt.RoundCap, Qt.RoundJoin))
self.addSeries(self.m_series)
# x轴
self.m_axisX = QDateTimeAxis(self)
self.m_axisX.setTickCount(self.m_count + 1) # 设置刻度数量
self.m_axisX.setFormat('hh:mm:ss') # 设置时间显示格式
now = QDateTime.currentDateTime() # 前10秒到现在
self.m_axisX.setRange(now.addSecs(-self.m_count), now)
self.addAxis(self.m_axisX, Qt.AlignBottom)
self.m_series.attachAxis(self.m_axisX)
# y轴
self.m_axisY = QValueAxis(self)
self.m_axisY.setLabelFormat('%d') # 设置文本格式
self.m_axisY.setMinorTickCount(4) # 设置小刻度线的数目
self.m_axisY.setTickCount(self.m_count + 1)
self.m_axisY.setRange(0, 100)
self.addAxis(self.m_axisY, Qt.AlignLeft)
self.m_series.attachAxis(self.m_axisY)
# 填充11个初始点,注意x轴 需要转为秒的时间戳
self.m_series.append(
[QPointF(now.addSecs(-i).toMSecsSinceEpoch(), 0) for i in range(self.m_count, -1, -1)])
# 定时器获取数据
self.m_timer = QTimer()
self.m_timer.timeout.connect(self.update_data)
self.m_timer.start(1000)
def update_data(self):
value = cpu_percent()
now = QDateTime.currentDateTime()
self.m_axisX.setRange(now.addSecs(-self.m_count), now) # 重新调整x轴的时间范围
# 获取原来的所有点,去掉第一个并追加新的一个
points = self.m_series.pointsVector()
points.pop(0)
points.append(QPointF(now.toMSecsSinceEpoch(), value))
# 替换法速度更快
self.m_series.replace(points)
if __name__ == '__main__':
app = QApplication(sys.argv)
chart = CpuLineChart()
chart.setTitle('cpu')
# chart.setAnimationOptions(QChart.SeriesAnimations)
view = QChartView(chart)
view.setRenderHint(QPainter.Antialiasing) # 抗锯齿
view.resize(800, 600)
view.show()
sys.exit(app.exec_())
此处可能存在不合适展示的内容,页面不予展示。您可通过相关编辑功能自查并修改。
如您确认内容无涉及 不当用语 / 纯广告导流 / 暴力 / 低俗色情 / 侵权 / 盗版 / 虚假 / 无价值内容或违法国家有关法律法规的内容,可点击提交进行申诉,我们将尽快为您处理。