[Qt-creator] "promote to" for a custum (designer) widget

[Jonas Eriksen Hjortlund]

Hi
I already asked this in user forum but no one seems to know why.

For test i used
http://doc.qt.io/qt-5/qtdesigner-worldtimeclockplugin-example.html

It load and works as expected.

However, right clicking it, do not give

"Promote to.." menu item that is available for all other widgets. ?

How can I make the custom widget promotable ?
Im sorry if its already in docs but I read it 3 times now and I see no mention of
How class can be promotable.

Thank you


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