Add an Example of Creating a Custom Widget

[bvinc]

I would love to see an example of writing a custom widget, for example: A new widget that derives from DrawingArea and implements Scrollable. Information on how to do this seems to be disjointed and hard to find.

[mmstick]

This would be identical to any other trait from a Rust library. Create a new type consisting of a collection of widgets relevant for your type, and implement the two traits for that type.

[nicholasbishop]

Could you clarify what the "two traits" are?

[john01dav]

@mmstick I'm also wondering what the "two traits" are. I've seen WidgetNameExt traits in the existing widgets, but that's only 1 trait, and it's not even the same one for each widget.

[zzeroo]

Here is a blog post about that topic: https://www.figuiere.net/technotes/notes/tn002/
@bvinc maybe this example covers your needs https://gtk-rs.org/docs/src/glib/subclass/types.rs.html#195-224

Gtk-rs examples cover that question, too:

• Basic subclass
• ListBox model

I think the issue can be closed