複合視窗部件就是由兩個或者多個其他視窗部件組合在一起的視窗部件。在大的工程專案中建立可重複使用的複合視窗部件能夠節約大量時間。本文就是通過python3+PyQt5實現。

#!/usr/bin/env python3
import sys
from PyQt5.QtCore import Qt
from PyQt5.QtWidgets import (QApplication, QBoxLayout, QDialog,
        QDialogButtonBox, QGridLayout, QLabel, QLineEdit, QTextEdit,
        QVBoxLayout, QWidget)

LEFT, ABOVE = range(2
 
)

class LabelledLineEdit(QWidget):

    def __init__(self, labelText="", position=LEFT,
                 parent=None):
        super(LabelledLineEdit, self).__init__(parent)
        self.label = QLabel(labelText)
        self.lineEdit = QLineEdit()
        self.label.setBuddy(self.lineEdit)
        layout = QBoxLayout(QBoxLayout.LeftToRight
 

                if position == LEFT else QBoxLayout.TopToBottom)
        layout.addWidget(self.label)
        layout.addWidget(self.lineEdit)
        self.setLayout(layout)


class LabelledTextEdit(QWidget):

    def __init__(self, labelText="", position=LEFT,
                 parent=None):
        super(LabelledTextEdit, self).__init__(parent)
        self.label
 
 = QLabel(labelText)
        self.textEdit = QTextEdit()
        self.label.setBuddy(self.textEdit)
        layout = QBoxLayout(QBoxLayout.LeftToRight
                if position == LEFT else QBoxLayout.TopToBottom)
        layout.addWidget(self.label)
        layout.addWidget(self.textEdit)
        self.setLayout(layout)


class Dialog(QDialog):

    def __init__(self, address=None, parent=None):
        super(Dialog, self).__init__(parent)

        self.street = LabelledLineEdit("&Street:")
        self.city = LabelledLineEdit("&City:")
        self.state = LabelledLineEdit("St&ate:")
        self.zipcode = LabelledLineEdit("&Zipcode:")
        self.notes = LabelledTextEdit("&Notes:", ABOVE)
        if address is not None:
            self.street.lineEdit.setText(address.get("street", ""))
            self.city.lineEdit.setText(address.get("city", ""))
            self.state.lineEdit.setText(address.get("state", ""))
            self.zipcode.lineEdit.setText(address.get("zipcode",
                                          ""))
            self.notes.textEdit.setPlainText(address.get("notes",
                                             ""))
        buttonBox = QDialogButtonBox(QDialogButtonBox.Ok|
                                     QDialogButtonBox.Cancel)

        grid = QGridLayout()
        grid.addWidget(self.street, 0, 0)
        grid.addWidget(self.city, 0, 1)
        grid.addWidget(self.state, 1, 0)
        grid.addWidget(self.zipcode, 1, 1)
        grid.addWidget(self.notes, 2, 0, 1, 2)
        layout = QVBoxLayout()
        layout.addLayout(grid)
        layout.addWidget(buttonBox)
        self.setLayout(layout)

        buttonBox.accepted.connect(self.accept)
        buttonBox.rejected.connect(self.reject)

        self.setWindowTitle("Labelled Widgets")


if __name__ == "__main__":
    fakeAddress = dict(street="3200 Mount Vernon Memorial Highway",
                       city="Mount Vernon", state="Virginia",
                       zipcode="22121")
    app = QApplication(sys.argv)
    form = Dialog(fakeAddress)
    form.show()
    app.exec_()
    print("Street:", str(form.street.lineEdit.text()))
    print("City:", str(form.city.lineEdit.text()))
    print("State:", str(form.state.lineEdit.text()))
    print("Notes:")
    print(str(form.notes.textEdit.toPlainText()))

執行結果：