Composition vs Inheritance and GUI toolkits

Posted by Anin Teger on Stack Overflow See other posts from Stack Overflow or by Anin Teger
Published on 2010-06-15T04:26:01Z Indexed on 2010/06/15 4:32 UTC
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gui

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inheritance

It's said that composition is preferred over inheritance. Every single open source GUI toolkit however uses inheritance for the drawn widgets (windows, labels, frames, buttons, etc). I checked Qt, wxWidgets, and GTK+. Is there an example of a GUI toolkit (written in any language) that uses composition instead of inheritance to separate the various widgets?

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