I am developing a tool which will have some variable sized windows. I am able to achieve this using the QSplitter horizontal & vertical. Please see attached image.
Now, how to make these individual windows detachable/maximize/close? How can I add cross markers at the top-right-corner of each window so that they can be closed maximized or detached from there? Just like this link :--
http://vector.com/portal/medien/ecu_testing/tae/test_automation_editor.png
You're looking for the QDockWidget class:
The QDockWidget class provides a widget that can be docked inside a QMainWindow or floated as a top-level window on the desktop. QDockWidget provides the concept of dock widgets, also know as tool palettes or utility windows. Dock windows are secondary windows placed in the dock widget area around the central widget in a QMainWindow.
Check out this example
来源：https://stackoverflow.com/questions/16334549/how-to-have-detachable-tool-windows-in-qt