Creating a hotel reservation form 

This application will display Calendar Widget, prompting the user to select the date for reserving a room. Also, a Spin Box widget will be displayed that asks the user to choose the number of days they want to stay. Besides this, a Combo Box widget will be displayed on the hotel reservation form that prompts the user to select the room type. The room rent will be based on the selected room type.

Getting ready

Before we begin creating a hotel reservation form, let's understand the use of the Combo Box widget first.

In order to display several options in minimum space, Combo Box is preferred. The QComboBox class is used for displaying a Combo Box widget. Not only text, but graphic images too can be displayed via a Combo Box widget. Here are the methods provided by the QComboBox class:

• setItemText(): This method is used to change the item in the Combo Box widget.
• removeItem(): This method is used to remove an item from the Combo Box widget.
• clear(): This method...