QTabWidget: how to implement MRU Ctrl+Tab switching ?

[AndrzejB]

I am using a QTabWidget in my application, and while the default Ctrl+Tab cycles through tabs linearly, I would like to implement a "most recently used" (MRU) switching behavior, similar to what users experience in browsers like Firefox or IDEs like CLion / IntelliJ IDEA.

My desired functionality for Ctrl+Tab is as follows:

• quick Press/Release: A standard, quick press and release of Ctrl+Tab should switch focus directly to the immediately preceding (most recently used) tab.
• hold Ctrl, Press Tab Repeatedly: When Ctrl is held down and Tab is pressed:
  • A popup should appear, listing the tabs ordered by most recently used.
  • Subsequent presses of Tab (while Ctrl is held) should cycle forward through this MRU list.
  • Shift+Ctrl+Tab should cycle backward through the MRU list.
  • Releasing the Ctrl key should activate the tab currently selected in the popup list.

[Kent-Dorfman]

FWIW, if there is no Qt direct solution then you should be able to work out the logic and build it manually, by catching the relevant framework events to determine last/next tab and manage a queue of them.

[AndrzejB]

Need new class sub-classing QTabWidget

MruTabWidget::MruTabWidget(QWidget *parent)  : QTabWidget(parent)

and

installEventFilter