PyQt5 - QDateEdit

PyQt5 - QDateEdit

QDateEdit is a widget in PyQt5 that allows the user to select a date using a nice GUI. It is part of the PyQt5's QtWidgets module. This widget provides a calendar pop-up that the user can navigate through months and years to select a date.

Here is how you can use QDateEdit in a simple PyQt5 application:

  1. Import the necessary modules: You need to import QApplication, QWidget, QDateEdit, and any other widgets you plan to use.

  2. Create an Application Instance: Every PyQt5 application must create an application object (QApplication).

  3. Create the Main Window or Widget: You can subclass from QWidget or another suitable widget to create your application's main window.

  4. Add a QDateEdit Widget: Create an instance of QDateEdit and add it to your layout.

  5. Optional: Customize the QDateEdit Widget: You might want to set the date format, the maximum and minimum dates, etc.

  6. Show the Widget: You must explicitly tell the widget to show itself.

  7. Start the Application's Event Loop: Call app.exec_() to start the main loop.

Here's an example of a minimal PyQt5 application with a QDateEdit widget:

import sys from PyQt5.QtWidgets import QApplication, QWidget, QVBoxLayout, QDateEdit from PyQt5.QtCore import QDate class MyApp(QWidget): def __init__(self): super().__init__() # Set up the layout layout = QVBoxLayout() # Create a QDateEdit widget and add it to the layout self.dateEdit = QDateEdit(self) self.dateEdit.setDate(QDate.currentDate()) # Set to current date self.dateEdit.setCalendarPopup(True) # Enable the calendar popup layout.addWidget(self.dateEdit) # Set the layout on the application's window self.setLayout(layout) # Optional: Customize the QDateEdit widget self.dateEdit.setDisplayFormat('yyyy-MM-dd') # Set the display format self.dateEdit.setMinimumDate(QDate(1900, 1, 1)) # Set the minimum date self.dateEdit.setMaximumDate(QDate(2100, 12, 31)) # Set the maximum date # Connect signals if needed, for example when the date changes self.dateEdit.dateChanged.connect(self.on_date_changed) def on_date_changed(self, date): print(f"The selected date is: {date.toString('yyyy-MM-dd')}") # Boilerplate code to start the application if __name__ == '__main__': app = QApplication(sys.argv) myApp = MyApp() myApp.show() sys.exit(app.exec_())

When you run this code, it will open a window with a QDateEdit widget that allows you to choose a date from a calendar pop-up. The on_date_changed method is connected to the dateChanged signal of QDateEdit and will print the selected date to the console in the yyyy-MM-dd format whenever the date is changed.

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