How to develop GUI Application with PyQt (python Qt)
There are two main methods for developing GUI application with qt: 1) Adding all widgets in your code (your cpp or python code) 2) Creating qt UI files, adding widgets there and load everything into your application. 1)Adding all widgets in your code Here is the snippet for adding all widgets and their slots in code:
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import sys print(sys.version) import warnings warnings.filterwarnings('ignore') from PyQt5 import QtCore, QtWidgets from PyQt5.QtWidgets import QMainWindow, QLabel, QSlider from PyQt5.QtCore import QSize, Qt, pyqtSlot,pyqtSignal class HelloWindow(QMainWindow): pushButtonClicked = pyqtSignal() valueUpdating = pyqtSignal(int) def pushButtonClicked(self): self.title.setText("PyQt updated!") def valueUpdating(self, value): self.title.setText(str(value)) def __init__(self): QMainWindow.__init__(self) self.setMinimumSize(QSize(640, 480)) self.setWindowTitle("Hello world") self.title = QLabel("PyQt!", self) self.title.setAlignment(QtCore.Qt.AlignCenter) self.pushButton = QtWidgets.QPushButton(self) self.pushButton.setGeometry(QtCore.QRect(140, 200, 99, 27))#x,y, width, height self.pushButton.setObjectName("pushButton") self.pushButton.setText("Click Me!") self.pushButton.clicked.connect(self.pushButtonClicked) self.slider = QtWidgets.QSlider(self) self.slider.setGeometry(QtCore.QRect(100, 20, 100, 30)) self.slider.setFocusPolicy(Qt.StrongFocus) self.slider.setTickPosition(QSlider.TicksBothSides) self.slider.setSingleStep(1) self.slider.setPageStep(1) self.slider.setMaximum(100) self.slider.setMinimum(0) self.slider.setOrientation(Qt.Horizontal) self.slider.valueChanged.connect(self.valueUpdating) if __name__ == "__main__": app = QtWidgets.QApplication(sys.argv) mainWin = HelloWindow() mainWin.show() sys.exit( app.exec_() ) |
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