PyQt5 使用matplotlib.pylot画图
2019-08-30 python 2464
import sys import numpy as np from PyQt5.QtWidgets import QMainWindow,QWidget,QApplication,QDesktopWidget,QPushButton,QVBoxLayout import matplotlib.pyplot as plt from matplotlib.backends.backend_qt5agg import FigureCanvasQTAgg as FC class QtDraw(QMainWindow): def __init__(self): super().__init__() self.initUI() def initUI(self): # matlib PyQt5 print("matplotlib") # 载入matplotlib self.fig = plt.Figure() self.canvas = FC(self.fig) self.btn_start = QPushButton("开始") self.btn_start.clicked.connect(self.draw) v = QVBoxLayout() v.addWidget(self.btn_start) v.addWidget(self.canvas) w = QWidget() w.setLayout(v) self.setCentralWidget(w) self.setGeometry(300,300,800,600) self.center() self.setWindowTitle("PyQt5 与 matplotlib") def draw(self): print("绘画开始") try: ax = self.fig.add_subplot(111) x = np.linspace(0,100,100) y = np.random.random(100) ax.cla() #删除原图,让画布上只有新的一次的图 ax.plot(x,y) self.canvas.draw() except Exception as e: print(str(e)) def center(self): qr = self.frameGeometry() cp = QDesktopWidget().availableGeometry().center() qr.moveCenter(cp) self.move(qr.topLeft()) if __name__ == "__main__": app = QApplication(sys.argv) draw = QtDraw() draw.show() sys.exit(app.exec_())
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