Plotting Realtime Data using Matplotlib in PyQt6

 This demo program shows how to plot realtime data, specifiy the location on a window among other things.

The Output:

The Code:

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import sys import numpy as np from matplotlib.backends.qt_compat import QtCore, QtGui, QtWidgets from matplotlib.backends.backend_qt5agg import FigureCanvas from matplotlib.figure import Figure def onclick(event): global clicks clicks.append(event.xdata) class ApplicationWindow(QtWidgets.QMainWindow): def __init__(self): super(ApplicationWindow, self).__init__() dynamic_canvas = FigureCanvas(Figure(figsize=(5, 3), dpi=115)) dynamic_canvas.setParent(self) dynamic_canvas.move(25,25) self._dynamic_ax = dynamic_canvas.figure.subplots() dynamic_canvas.figure.canvas.mpl_connect('button_press_event', onclick) self._dynamic_ax.grid() self._timer = dynamic_canvas.new_timer( 100, [(self._update_window, (), {})]) self._timer.start() button_stop = QtWidgets.QPushButton('Stop', self) button_stop.setGeometry(625, 95, 100, 40) button_stop.clicked.connect(self._timer.stop) button_start = QtWidgets.QPushButton('Start', self) button_start.setGeometry(625, 40, 100, 40) button_start.clicked.connect(self._timer.start) self.setGeometry(25, 45, 745, 400) self.setWindowTitle('Post 8') self.show() def _update_window(self): self._dynamic_ax.clear() global x, y1, y2, y3, N, count_iter, last_number_clicks x.append(x[count_iter] + 0.01) y1.append(np.random.random()) idx_inf = max([count_iter-N, 0]) if last_number_clicks < len(clicks): for new_click in clicks[last_number_clicks:(len(clicks))]: rowPosition = self.table_clicks.rowCount() self.table_clicks.insertRow(rowPosition) self.table_clicks.setItem(rowPosition,0, QtWidgets.QTableWidgetItem(str(new_click))) self.table_clicks.setItem(rowPosition,1, QtWidgets.QTableWidgetItem("Descripcion")) last_number_clicks = len(clicks) self._dynamic_ax.plot(x[idx_inf:count_iter], y1[idx_inf:count_iter],'-o', color='b') count_iter += 1 self._dynamic_ax.figure.canvas.draw() #%% if __name__ == "__main__": pressed_key = {} clicks = [] last_number_clicks = len(clicks) N = 25 y1 = [np.random.random()] x = [0] count_iter = 0 qapp = QtWidgets.QApplication(sys.argv) app = ApplicationWindow() app.show() sys.exit(qapp.exec())

Tabbed Container with PyQt6

 This demo program show how to create a tab widget, place it on a specific location in a window, add widgets to each tab among others.

The output:

The code:

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from PyQt6.QtCore import * from PyQt6.QtWidgets import * import sys class Window(QWidget): def __init__(self): QWidget.__init__(self) self.tab1 = QWidget() self.tab2 = QWidget() label1 = QLabel("Widget in Tab 1.") label2 = QLabel("Widget in Tab 2.") label3 = QLabel("Test Widget in Tab 1.") label4 = QLabel("Test Widget in Tab 2.") self.tabwidget = QTabWidget(self) self.tabwidget.addTab(self.tab1,"Tab 1") self.tabwidget.addTab(self.tab2,"Tab 2") layout = QFormLayout() layout.addRow(label1) layout.addRow(label3) self.tab1.setLayout(layout) layout1 = QFormLayout() layout1.addRow(label2) layout1.addRow(label4) self.tab2.setLayout(layout1) self.tabwidget.setGeometry(25, 25, 350, 260) self.setGeometry(300, 300, 490,300) app = QApplication(sys.argv) screen = Window() screen.show() sys.exit(app.exec())

Matplotlib with PyQt6

 This demo program shows how to plot line graph, place it on a specific location in a window, specify the size, among others.

The output:

The code:

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import sys from PyQt6.QtWidgets import QApplication, QWidget from matplotlib.backends.backend_qt5agg import FigureCanvasQTAgg as FigureCanvas from matplotlib.figure import Figure import matplotlib.pyplot as plt class Window(QWidget): def __init__(self): super(Window, self).__init__() self.initUI() def initUI(self): m = PlotCanvas(self, width=5, height=3) m.move(25,25) self.setGeometry(25, 45, 625, 400) self.setWindowTitle('Post 6') self.show() class PlotCanvas(FigureCanvas): def __init__(self, parent=None, width=5, height=3, dpi=115): fig = Figure(figsize=(width, height), dpi=dpi) FigureCanvas.__init__(self, fig) self.setParent(parent) FigureCanvas.updateGeometry(self) self.plot() def plot(self): x = [0, 0, 25, 22, 0, 0, 0, 50, 78, 260, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0] z = [0, 0, 75, 42, 0, 0, 0, 150, 165, 400, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0] a = [0, 0, 1005, 72, 0, 0, 0, 350, 350, 650, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0] y = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24] ax = self.figure.add_subplot(111) ax.plot(y,x) ax.plot(y,z) ax.plot(y,a) self.draw() def main(): app = QApplication(sys.argv) ex = Window() sys.exit(app.exec()) if __name__ == '__main__': main()

Progressbar with PyQt6

This demo program shows how to create a progressbar, set its color, align text, place it to a specific location in a window, among other things.

Output:

The Code:

 

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import sys import time from PyQt6.QtWidgets import QApplication, QWidget, QPushButton, QProgressBar from PyQt6.QtCore import Qt TIME_LIMIT = 100 class Window(QWidget): def __init__(self): super(Window, self).__init__() self.initUI() def initUI(self): self.progress = QProgressBar(self) self.progress.setGeometry(25, 35, 305, 20) self.progress.setMaximum(100) self.progress.setStyleSheet("QProgressBar::chunk " "{" "background-color: red;text-align: center" "}") self.progress.setAlignment(Qt.AlignmentFlag.AlignCenter) pb3 = QPushButton('Process', self) pb3.setGeometry(50, 100, 250, 30) pb3.setStyleSheet('QPushButton {background-color: #2F569B; color: #d4d4d4;}') pb3.clicked.connect(self.onClick_pb3) self.setGeometry(25, 45, 350, 150) self.setWindowTitle('Post 5') self.show() def onClick_pb3(self): count = 0 while count < TIME_LIMIT: count += 1 time.sleep(0.01) self.progress.setValue(count) def main(): app = QApplication(sys.argv) ex = Window() sys.exit(app.exec()) if __name__ == '__main__': main()

Datagrid with PyQt6

This demo program shows how to create a datagrid, place it on a specific location in a window, among other things. Output:

The code:

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import sys from PyQt6.QtWidgets import QApplication, QWidget, QTableWidget from PyQt6.QtGui import QPainter, QColor, QPen from PyQt6.QtCore import Qt class Window(QWidget): def __init__(self): super(Window, self).__init__() self.initUI() def initUI(self): self.setGeometry(25, 45, 330, 325) self.setWindowTitle('Post 4') self.createTable() self.show() def createTable(self): self.tableWidget = QTableWidget(self) self.tableWidget.setRowCount(24) self.tableWidget.setColumnCount(2) self.tableWidget.setFixedSize(280, 275) self.tableWidget.move(25, 25) self.tableWidget.setHorizontalHeaderLabels(['PM2.5', 'PM10']) self.tableWidget.horizontalHeader().setStretchLastSection(True) self.tableWidget.verticalHeader().setStretchLastSection(True) def main(): app = QApplication(sys.argv) ex = Window() sys.exit(app.exec()) if __name__ == '__main__': main()

Draw Rectangle and Ellipse with PyQt6

This demo program shows how to draw rectangle and ellipse and place at specific location on the window, specify fill colors, set size and pen size.

Output:

The code:

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import sys from PyQt6.QtWidgets import QApplication, QWidget, QLabel from PyQt6.QtGui import QPainter, QColor, QPen from PyQt6.QtCore import Qt class Window(QWidget): def __init__(self): super(Window, self).__init__() self.initUI() def initUI(self): self.setGeometry(25, 45, 640, 300) self.setWindowTitle('Post 3') self.show() def paintEvent(self, e): qp = QPainter() qp.begin(self) self.drawRectangles(qp) qp.end() def drawRectangles(self, qp): color = QColor(0, 0, 0) color.setNamedColor('#d4d4d4') qp.setPen(color) qp.setBrush(QColor('#ffffff')) qp.drawRect(25, 25, 150, 30) pen = QPen() pen.setWidth(5) qp.setBrush(QColor('#00aa00')) qp.drawEllipse(25, 80, 300, 150) qp.setBrush(QColor('#d4d4d4')) qp.drawEllipse(40, 115, 270, 110) ii = 0 while ii < 24: ii = ii + 1 iii = (ii * 24) + 10 qp.setBrush(QColor('#00aa00')) qp.drawRect(iii, 260, 22, 15) def main(): app = QApplication(sys.argv) ex = Window() sys.exit(app.exec()) if __name__ == '__main__': main()

Label with PyQt6

 This sample program demonstrate how to format a label, place it on a specific location in the window and try to specify font, size, alignment, among others.

Output:

The code:

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import sys from PyQt6.QtWidgets import QApplication, QWidget, QLabel from PyQt6.QtGui import QFont from PyQt6.QtCore import Qt class Window(QWidget): def __init__(self): super(Window, self).__init__() self.initUI() def initUI(self): lbl1a = QLabel('RECS', self) lbl1a.setGeometry(25, 10, 50, 35) lbl1a.setStyleSheet('QLabel {background-color: #0E95A6; color: #d4d4d4;}') lbl1a.setAlignment(Qt.AlignmentFlag.AlignCenter) lbl17 = QLabel('24Hr Air Quality', self) lbl17.setGeometry(25, 55, 150, 35) lbl19 = QLabel('Air Quality Analysis Dash Board', self) lbl19.setFont(QFont("Arial", 18)) lbl19.setGeometry(25, 100, 350, 40) self.setGeometry(25, 45, 380, 150) self.setWindowTitle('Post 2') self.show() def main(): app = QApplication(sys.argv) ex = Window() sys.exit(app.exec()) if __name__ == '__main__': main()

Button with PyQt6

This sample program demonstrate how to format a button, place it on a specific location in the window and try to execute a command upon pressing.

Output:

The code:

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import sys import os from PyQt6.QtWidgets import QApplication, QWidget, QPushButton class Window(QWidget): def __init__(self): super(Window, self).__init__() self.initUI() def initUI(self): pb1 = QPushButton('Exit', self) pb1.setGeometry(50, 20, 250, 30) pb1.setStyleSheet('QPushButton {background-color: #2F569B; color: #d4d4d4;}') pb1.clicked.connect(onClick_pb1) pb2 = QPushButton('Click Me!', self) pb2.setGeometry(50, 60, 250, 30) pb2.setStyleSheet('QPushButton {background-color: #2F569B; color: #d4d4d4;}') pb2.clicked.connect(self.onClick_pb2) pb3 = QPushButton('Open Notepad', self) pb3.setGeometry(50, 100, 250, 30) pb3.setStyleSheet('QPushButton {background-color: #2F569B; color: #d4d4d4;}') pb3.clicked.connect(onClick_pb3) self.setGeometry(25, 45, 350, 150) self.setWindowTitle('Post 1') self.show() def onClick_pb2(self): print("clicked") def onClick_pb3(): os.popen(r"C:\WINDOWS\system32\notepad.exe") def onClick_pb1(): exit() def main(): app = QApplication(sys.argv) ex = Window() sys.exit(app.exec()) if __name__ == '__main__': main()