PySide6 QFormLayout Example 

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65

# QFormLayout lets you create forms

import sys
from PySide6.QtCore import Slot
from PySide6.QtWidgets import (QApplication, 
    QWidget, QFormLayout, QLineEdit, QLabel)


class Window(QWidget):
    
    def __init__(self):

        super().__init__()
        
        # 1 - Create the layout and set it as the window layout
        
        layout = QFormLayout()
        self.setLayout(layout)
        
        # 2 - Create widgets
        #     Will need to access all widgets from the slot
        
        self.name_edit = QLineEdit()
        self.email_edit = QLineEdit()
        self.age_edit = QLineEdit()
        # The label will display entered data
        self.summary_label = QLabel()
        
        # 3 - Add widgets to the form
        #     QFormLayout will automagically add a label 
        #     for each widget based on the text you pass to addRow()
        
        layout.addRow('Name', self.name_edit)
        layout.addRow('e-mail', self.email_edit)
        layout.addRow('Age', self.age_edit)
        layout.addRow('Summary:', self.summary_label)
        
        # self.on_editing_finished() will handle events for all widgets.
        # editingFinished() is fired when Return is pressed
        # or the line edit loses focus.
        
        self.name_edit.editingFinished.connect(self.on_editing_finished)
        self.email_edit.editingFinished.connect(self.on_editing_finished)
        self.age_edit.editingFinished.connect(self.on_editing_finished)
    
    @Slot()    
    def on_editing_finished(self):
        
        self.summary_label.setText(
            f'Name:\t{self.name_edit.text()}\n' +
            f'e-mail:\t{self.email_edit.text()}\n' +
            f'Age:\t{self.age_edit.text()}')


if __name__ == '__main__':

    if not QApplication.instance():
        app = QApplication(sys.argv)
    else:
        app = QApplication.instance()

    main_window = Window()
    main_window.show()

    sys.exit(app.exec())

QFormLayout lays out its child widgets in a two-column form. You can use QFormLayout.addRow() to add widgets to the form layout along with its associated label similar to HTML forms. To use QFormLayout in your application

  1. Create a QFormLayout instance and set it as the QWidget layout

  2. Create child widgets. Since we’ll need to access the widgets from the slot method make the widgets instance members of Window.

  3. Add child widgets to the form using QFormLayout.addRow(label_text, widget) to add the label-widget pair to the layout. addRow() is a convenience method so you can add two widgets to the layout at a time but you can still use addWidget() as with QVBoxLayout.

In the example form we have three QLineEdit widgets and handle their editingFinished with a single slot. editingFinished is emitted when the Return or Enter key is pressed or when the line edit whose contents have changed loses focus. The slot simply sets summary_label text to the values of the three QLineEdit widgets.