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_CBclickRichText
Define a callback function on click event.

ObjRichText _CBclickRichText (
ObjRichText _richtext_
fun [ObjRichText u0 I I] u1 _callback_
u0 _user_
)
Parameters

_richtext_
any rich text.
_callback_
callback on click event (supplemental parameters are click coordinates)
_user_
user parameter
Return value

same richtext