75 lines
2.2 KiB
Python
75 lines
2.2 KiB
Python
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#!/usr/bin/env python
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# -*- coding: utf-8 -*-
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"""
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Created on 2019年5月5日
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@author: Yimelia
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@site: https://github.com/yimelia
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@file: DynamicSpline
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@description: This example shows how to draw dynamic data. https://doc.qt.io/qt-5/qtcharts-dynamicspline-example.html
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"""
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import sys
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from PyQt5.QtCore import Qt, QTimer, QRandomGenerator
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from PyQt5.QtChart import QChartView, QLineSeries, QChart, QSplineSeries, QValueAxis
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from PyQt5.QtGui import QPainter, QPen
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from PyQt5.QtWidgets import QApplication
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__version__ = "0.0.1"
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class DynamicSpline(QChart):
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def __init__(self):
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super().__init__()
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self.m_step = 0
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self.m_x = 5
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self.m_y = 1
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# 初始化图像
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self.series = QSplineSeries(self)
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green_pen = QPen(Qt.red)
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green_pen.setWidth(3)
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self.series.setPen(green_pen)
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self.axisX = QValueAxis()
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self.axisY = QValueAxis()
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self.series.append(self.m_x, self.m_y)
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self.addSeries(self.series)
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self.addAxis(self.axisX, Qt.AlignBottom)
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self.addAxis(self.axisY, Qt.AlignLeft)
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self.series.attachAxis(self.axisX)
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self.series.attachAxis(self.axisY)
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self.axisX.setTickCount(5)
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self.axisX.setRange(0, 10)
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self.axisY.setRange(-5, 10)
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self.timer = QTimer(self)
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self.timer.setInterval(1000)
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self.timer.timeout.connect(self.handleTimeout)
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self.timer.start()
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def handleTimeout(self):
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x = self.plotArea().width() / self.axisX.tickCount()
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y = (self.axisX.max() - self.axisX.min()) / self.axisX.tickCount()
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self.m_x += y
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# 在PyQt5.11.3及以上版本中，QRandomGenerator.global()被重命名为global_()
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self.m_y = QRandomGenerator.global_().bounded(5) - 2.5
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self.series.append(self.m_x, self.m_y)
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self.scroll(x, 0)
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if self.m_x >= 100:
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self.timer.stop()
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if __name__ == "__main__":
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app = QApplication(sys.argv)
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chart = DynamicSpline()
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chart.setTitle("Dynamic spline chart")
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chart.legend().hide()
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chart.setAnimationOptions(QChart.AllAnimations)
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view = QChartView(chart)
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view.setRenderHint(QPainter.Antialiasing) # 抗锯齿
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view.resize(400, 300)
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view.show()
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sys.exit(app.exec_())
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