PyQt5 - Setting background color to ComboBox when it get pressed

PyQt5 - Setting background color to ComboBox when it get pressed

To set the background color of a QComboBox in PyQt5 when it is pressed, you can use the QStyle and QStyleSheets. Here's a step-by-step guide on how to achieve this:

  1. Import PyQt5 Modules: Import the necessary modules from PyQt5.

    from PyQt5.QtWidgets import QApplication, QWidget, QVBoxLayout, QComboBox from PyQt5.QtGui import QColor

  2. Set StyleSheet for QComboBox: You can use the setStyleSheet method to define CSS-like styles for your widgets. For changing the background color when the QComboBox is pressed, use the :pressed pseudo-state.

    style = """ QComboBox { background-color: normal-color; } QComboBox:pressed { background-color: pressed-color; } """ style = style.replace('normal-color', '#FFFFFF') # Normal background color (e.g., white) style = style.replace('pressed-color', '#A3C1DA') # Pressed background color (e.g., light blue)

  3. Apply the StyleSheet: Apply this style sheet to your QComboBox.

    combo_box = QComboBox() combo_box.setStyleSheet(style)

  4. Create a Main Window: Set up your main window and add the QComboBox to it.

    class MainWindow(QWidget): def __init__(self): super().__init__() # Layout layout = QVBoxLayout() self.setLayout(layout) # Add QComboBox combo_box = QComboBox() combo_box.addItems(['Item 1', 'Item 2', 'Item 3']) combo_box.setStyleSheet(style) layout.addWidget(combo_box) # Run the application if __name__ == '__main__': app = QApplication([]) main_win = MainWindow() main_win.show() app.exec_()

  5. Run the Application: When you run this application, the QComboBox will have a default background color. When you press the QComboBox, the background color will change to the color you specified in the :pressed style.

This approach is flexible and allows you to define a wide range of styles for your PyQt5 widgets using a familiar CSS-like syntax. You can modify the style sheet to adjust the colors and styles as needed.

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