[R] how to work ttkspinbox ?

[Cleber N.Borges]

hello all,

somebody have a example of use of  ttkspinbox ?
I tried to use like others widgets but I get error.

Thanks in advanced for any help

cleber

###################
 > library( tcltk )
 >
 > t <- tktoplevel()
 >
 > spin <- ttkspinbox( t )
Error in structure(.External(.C_dotTclObjv, objv), class = "tclObj") :
   [tcl] invalid command name "ttk::spinbox".
 >
 > combo <- ttkcombobox( t )
 > tkpack( combo )
<Tcl>
 >



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