Mastering GUI Programming with Python

Building our new category pop-up form

The last feature we want in our application is the ability to add new categories to our combo box. The basic workflow we need to implement is this:

1. When a user changes the event category, check whether they selected New…
2. If so, open a form in a new window that lets them type in a category
3. When the form is submitted, emit the name of the new category
4. When that signal is emitted, add a new category to the combo box and select it
5. If the user opts not to enter a new category, default the combo box to Select Category…

Let's start by implementing our pop-up form. This will be just like the form example we went through earlier in this chapter, and it looks like this:

class CategoryWindow(qtw.QWidget): submitted ...