PyQt5 - Add border to lineedit part of ComboBox

PyQt5 - Add border to lineedit part of ComboBox

In PyQt5, the QComboBox widget can be considered as a combination of a QLineEdit and a QListView (or QListBox), especially when it's in an editable mode.

To add a border to the QLineEdit part of an editable QComboBox, you'd typically make use of the QComboBox's stylesheet. The QComboBox provides the ::lineEdit subcontrol that allows you to specifically target the QLineEdit part for styling.

Here's an example of how to add a border to the QLineEdit part of a QComboBox:

import sys from PyQt5.QtWidgets import QApplication, QWidget, QVBoxLayout, QComboBox class MyApp(QWidget): def __init__(self): super().__init__() self.initUI() def initUI(self): layout = QVBoxLayout() combobox = QComboBox(self) combobox.setEditable(True) # Add a few items for demonstration combobox.addItems(['Option 1', 'Option 2', 'Option 3']) # Add a border to the QLineEdit part of the combobox combobox.setStyleSheet('QComboBox::lineEdit { border: 2px solid red; }') layout.addWidget(combobox) self.setLayout(layout) self.setWindowTitle('QComboBox Border Example') self.show() if __name__ == '__main__': app = QApplication(sys.argv) ex = MyApp() sys.exit(app.exec_())

In this example, the QComboBox's QLineEdit part is styled with a 2-pixel solid red border. You can adjust the stylesheet as desired to customize the appearance of the border or any other part of the QComboBox.

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