In this PyQt5 article we want to learn about How to Create ComboBox in PyQt5, so PyQt5 is Python binding for Qt Framework, and it is used for building Graphical User Interface applications with Python, and ComboBox is a widget that allows users to select an option from a drop down list.
This is the complete code for this article
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import sys from PyQt5.QtWidgets import QApplication, QMainWindow, QComboBox, QLabel from PyQt5.QtGui import QFont class MainWindow(QMainWindow): def __init__(self): super().__init__() self.setGeometry(100, 100, 300, 200) self.setWindowTitle("Geekscoders - ComboBox") self.combo_box = QComboBox(self) self.combo_box.setGeometry(50, 50, 200, 30) self.combo_box.addItem("Python") self.combo_box.addItem("Java") self.combo_box.addItem("C++") self.combo_box.currentIndexChanged.connect(self.handle_selection) self.result_label = QLabel(self) self.result_label.setGeometry(50, 200, 400, 30) self.result_label.setText("Selected option: ") def handle_selection(self, index): selected_option = self.combo_box.currentText() self.result_label.setText("Selected option: " + selected_option) self.result_label.setFont(QFont("Times", 15)) if __name__ == "__main__": app = QApplication(sys.argv) window = MainWindow() window.show() sys.exit(app.exec_()) |
In the above code first we have imported the required modules and classes from PyQt5.
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import sys from PyQt5.QtWidgets import QApplication, QMainWindow, QComboBox, QLabel from PyQt5.QtGui import QFont |
In here we are setting the geometry of the window with the window title, for the geometry we can say x and y position, also width and height.
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self.setGeometry(100, 100, 300, 200) self.setWindowTitle("Geekscoders - ComboBox") |
In here we have created our combo box and we have added some items to that.
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self.combo_box = QComboBox(self) self.combo_box.setGeometry(50, 50, 200, 30) self.combo_box.addItem("Python") self.combo_box.addItem("Java") self.combo_box.addItem("C++") |
This code establishes a connection between the currentIndexChanged signal of the QComboBox and the handle_selection method. Whenever the user selects a different option, the handle_selection method will be called, and it allows us to update the display or perform other relevant actions based on the selected option.
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self.combo_box.currentIndexChanged.connect(self.handle_selection) |
This is our method or slot that we have already connected that to the signal, in this method first we get the current selected text from the combox box and after that we set that to the label, also we change the font of the label.
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def handle_selection(self, index): selected_option = self.combo_box.currentText() self.result_label.setText("Selected option: " + selected_option) self.result_label.setFont(QFont("Times", 15)) |
Run the complete code and this will be the result
