[R] help with tktag.bind

[solares@unsl.edu.ar]

Hi, i newbee in R and not understand the command tktag.bind, the code below
not work find, (not change the foreground to red at move the cursos on the
lines in the tktext and the for sentence appear not work) Why is
this?Thanks


library(tcltk)
tt<-tktoplevel()
editor<-tktext(tt)
tkpack(editor)
tkinsert(editor,"1.0","first line \n")
tkinsert(editor,"2.0","Second line \n")
tkinsert(editor,"3.0","Third line \n")

cambio1<-function(t){
         tktag.configure(editor,t,foreground="red")
         }
cambio2<-function(t){
         tktag.configure(editor,t,foreground="black")
         }

tktag.add(editor,"t1","1.0","1.end")
tktag.add(editor,"t2","2.0","2.end")
tktag.add(editor,"t3","3.0","3.end")
tkbind(editor,"<ButtonPress-1>",cambio1)
tkbind(editor,"<ButtonRelease-1>",cambio2)
hello<-function() print("hello")
tktag.bind(editor,"t1","<1>",hello)
tktag.bind(editor,"t1","<Motion>",cambio1(t1))
tktag.bind(editor,"t1","<Leave>",cambio2(t1))

l<-c("t1","t2","t3")
for (t in l) 
tktag.bind(editor,t,"<Motion>",tktag.configure(editor,t,foreground="red"))
for (t in l) 
tktag.bind(editor,t,"<Leave>",tktag.configure(editor,t,foreground="black"))