How to add an slider bar into QMenu?

My context menu have so many items that i need a slider bar to control it, but i did't find any开发者_开发知识库 function could do this. How could i do?

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From another thread on Stack Overflow, I found this trick:

submenu->setStyleSheet("QMenu { menu-scrollable: 1; }");

For further information, see create a scrollbar in a submenu qt?

@Frank Osterfeld: I have a perfect example of a valid use case for huge contextual menu that needs a scrollbar, Qt Creator and the auto-completion list.

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Menus don't have scrollbars. The style and behavior of (context) menus is defined by OS X, Windows, KDE/Gnome etc., and to my knowledge none of them include scrollbars. Sometimes the menu wraps if it doesn't fit the screen, which is already annoying. Scrollbars in a context menu would be even more unusable. A context menu is just not the right place for such a huge amount of items, and you should redesign your application accordingly.