Using the Spin Box widget
The Spin Box widget is used for displaying integer values, floating-point values, and text. It applies a constraint on the user: the user cannot enter any random data, but can select only from the available options displayed through Spin Box. A Spin Box widget displays an initial value by default that can be increased or decreased by selecting the up/down button or up/down arrow key on the keyboard. You can choose a value that is displayed by either clicking on it or typing it in manually.
Getting ready
A Spin Box widget can be created using two classes, QSpinBox and QDoubleSpinBox, where QSpinBox displays only integer values, and the QDoubleSpinBox class displays floating-point values. Methods provided by QSpinBox are shown in the following list:
value(): This method returns the current integer value selected from the spin box.text(): This method returns the text displayed by the spin box.setPrefix(): This method assigns the prefix text that is prepended to the value...
