[issue3405] Add support for the new data option supported by event generate (Tk 8.5)

[O.C.]

O.C. <oc-spam66 at laposte.net> added the comment:

Hello,

I read the proposed patch "event_generate__data2.diff" and the Tcl/Tk manual http://www.tcl.tk/man/tcl8.5/TkCmd/bind.htm#M24

* Could you please also add a field "e.user_data" ? This would simply be a copy of 'd' :
---
e.detail = d
e.user_data = d
---
My reasoning is that the Tcl/Tk manual mentions the two names "detail" and "user_data". However, "user_data" may often be preferred because it has a clear meaning, whereas "detail" is quite vague.

* I did not understand why you try to get a widget reference from the "%d" field. Is it supposed to contain a widget name at some point ? According to the manual (and if I understood it well), it should never. 

Best regards,

O.C.

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nosy: +dghjfrdj

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