Basic Layouts Example

Basic Layouts shows how to use the standard layout managers that are available in Qt Widgets: QBoxLayout, QGridLayout, and QFormLayout.

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basiclayouts.py

# Copyright (C) 2013 Riverbank Computing Limited.
# Copyright (C) 2022 The Qt Company Ltd.
# SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
from __future__ import annotations

"""PySide6 port of the widgets/layouts/basiclayout example from Qt v5.x"""

import sys

from PySide6.QtWidgets import (QApplication, QComboBox, QDialog,
                               QDialogButtonBox, QGridLayout, QGroupBox,
                               QFormLayout, QHBoxLayout, QLabel, QLineEdit,
                               QMenu, QMenuBar, QPushButton, QSpinBox,
                               QTextEdit, QVBoxLayout)


class Dialog(QDialog):
    num_grid_rows = 3
    num_buttons = 4

    def __init__(self):
        super().__init__()

        self.create_menu()
        self.create_horizontal_group_box()
        self.create_grid_group_box()
        self.create_form_group_box()

        big_editor = QTextEdit()
        big_editor.setPlainText("This widget takes up all the remaining space "
                                "in the top-level layout.")

        button_box = QDialogButtonBox(QDialogButtonBox.Ok | QDialogButtonBox.Cancel)

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

        main_layout = QVBoxLayout()
        main_layout.setMenuBar(self._menu_bar)
        main_layout.addWidget(self._horizontal_group_box)
        main_layout.addWidget(self._grid_group_box)
        main_layout.addWidget(self._form_group_box)
        main_layout.addWidget(big_editor)
        main_layout.addWidget(button_box)
        self.setLayout(main_layout)

        self.setWindowTitle("Basic Layouts")

    def create_menu(self):
        self._menu_bar = QMenuBar()

        self._file_menu = QMenu("&File", self)
        self._exit_action = self._file_menu.addAction("E&xit")
        self._menu_bar.addMenu(self._file_menu)

        self._exit_action.triggered.connect(self.accept)

    def create_horizontal_group_box(self):
        self._horizontal_group_box = QGroupBox("Horizontal layout")
        layout = QHBoxLayout()

        for i in range(Dialog.num_buttons):
            button = QPushButton(f"Button {i + 1}")
            layout.addWidget(button)

        self._horizontal_group_box.setLayout(layout)

    def create_grid_group_box(self):
        self._grid_group_box = QGroupBox("Grid layout")
        layout = QGridLayout()

        for i in range(Dialog.num_grid_rows):
            label = QLabel(f"Line {i + 1}:")
            line_edit = QLineEdit()
            layout.addWidget(label, i + 1, 0)
            layout.addWidget(line_edit, i + 1, 1)

        self._small_editor = QTextEdit()
        self._small_editor.setPlainText("This widget takes up about two thirds of the grid layout.")

        layout.addWidget(self._small_editor, 0, 2, 4, 1)

        layout.setColumnStretch(1, 10)
        layout.setColumnStretch(2, 20)
        self._grid_group_box.setLayout(layout)

    def create_form_group_box(self):
        self._form_group_box = QGroupBox("Form layout")
        layout = QFormLayout()
        layout.addRow(QLabel("Line 1:"), QLineEdit())
        layout.addRow(QLabel("Line 2, long text:"), QComboBox())
        layout.addRow(QLabel("Line 3:"), QSpinBox())
        self._form_group_box.setLayout(layout)


if __name__ == '__main__':
    app = QApplication(sys.argv)
    dialog = Dialog()
    sys.exit(dialog.exec())