One way of creating a custom widget is by adding a Designer Form Class to the project. Designer Form Class is a template provided by Qt Creator. It consists of a C++ class that inherits QWidget (directly or indirectly) and a designer form (.ui file), tied together by some automatically generated code. Our MainWindow class also follows this template.
However, if you try to use the visual form editor to create our tic-tac-toe board, you may find it quite inconvenient for this task. One problem is that you need to add nine identical buttons to the form manually. Another issue is accessing these buttons from the code when you need to make a signal connection or change the button's text. The ...
