Buy Me a Coffee? Your support is much appreciated!
demo.py
import sys
import matplotlib
matplotlib.use("Qt5Agg")
import numpy as np
from matplotlib.backends.backend_qt5agg import FigureCanvasQTAgg as FigureCanvas
from matplotlib.figure import Figure
# pip install pyqt5
from PyQt5.QtWidgets import QApplication, QSizePolicy, QWidget, QMainWindow, QMenu, QVBoxLayout, QSpinBox
from PyQt5.QtCore import Qt
class MyMplCanvas(FigureCanvas):
def __init__(self, parent=None, width=10, height=7, dpi=200):
fig = Figure(figsize=(width, height), dpi=dpi)
self.axes = fig.add_subplot(111)
FigureCanvas.__init__(self, fig)
self.setParent(parent)
self.axes.plot()
FigureCanvas.setSizePolicy(self,
QSizePolicy.Expanding,
QSizePolicy.Expanding)
FigureCanvas.updateGeometry(self)
class MyStaticMplCanvas(MyMplCanvas):
"""Simple canvas with a sine plot."""
def update_figure(self, f):
self.axes.cla()
t = np.arange(0.0, 3.0, 0.01)
s = np.sin(f*np.pi*t)
self.axes.plot(t, s)
self.draw()
class ApplicationWindow(QMainWindow):
def __init__(self):
super().__init__()
self.setStyleSheet('font-size: 35px;')
self.file_menu = QMenu('&File', self)
self.file_menu.addAction('&Quit', self.close, Qt.CTRL + Qt.Key_Q)
self.menuBar().addMenu(self.file_menu)
self.main_widget = QWidget()
layout = QVBoxLayout(self.main_widget)
self.spinbox = QSpinBox(minimum=1, maximum=10, singleStep=1, value=1)
sc = MyStaticMplCanvas(self.main_widget)
self.spinbox.valueChanged.connect(sc.update_figure)
sc.update_figure(self.spinbox.value())
layout.addWidget(self.spinbox)
layout.addWidget(sc)
self.main_widget.setFocus()
self.setCentralWidget(self.main_widget)
if __name__ == '__main__':
app = QApplication(sys.argv)
win = ApplicationWindow()
win.setWindowTitle("PyQt5 Matplotlib App Demo")
win.show()
sys.exit(app.exec_())
