[PyQt] Promote custom widget in Designer

[Kyle Altendorf]

On 2017-09-02 11:18, Laís Pessine do Carmo wrote:

> However, for some applications, I need to customize QLed a little bit 
> by promoting it (because I would like NOT to create another plugin just 
> for these minor changes).

My plugin files are really simple and I would personally rather just 
copy/paste/tweak one than find some workaround that provides an 
inconsistent interface in designer.

https://github.com/altendky/st/blob/lib/epyqlib/widgets/buttonplugin.py

Do note that I have put all the boilerplate for the plugins into a class 
I can inherit from.  Could also be a decorator probably if you wanted to 
avoid inheritance.

Cheers,
-kyle