Difference between QPushButton and QToolButton

I'm new to Qt and the difference between QPushButton and QToolButton is not so clear to me.

I know that a QToolButton is usually used in a QToolBar and it usually shows only an icon, without text, but I don't quite understand the main difference between both.

Does it have any bigger difference? When should I use QPushButton and when should I use QToolButton?

I would like to know this to use the most appropriate button, and I need to perform some GUI tests and maybe it can be relevant.

QPushButton is simply a button. QToolButton is part of a group of widgets in the QtWidgets module that operate on QActions: QMenu and QToolBar are other examples. As a result, QToolButton is much more complex under the hood than QPushButton.

Some examples of how they are different in practice:

• QToolButton is tightly integrated with QAction. Changing the icon, text, or other properties of a tool button's default action is reflected on the button.
• You can change the layout of the tool button contents (icon only, text only, text beside icon, text below icon). This is not possible for a QPushButton.
• QToolButton supports a "split" button type: a sidebar hot zone opens a menu instead of triggering the default action.
• Tool buttons can be created directly in a QToolBar by adding an action. Other widgets must be explicitly added to the toolbar.
• A tool button is meant to be displayed in a grid, so it has smaller default internal margins than a push button.
• QPushButton is more for "Ok"/"Close" type buttons that contain text with an optional icon.
• A QToolButton should generally have an icon.
• A QPushButton should always have text.