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what does set w .session$s_id mean?

Posted by yechengyu (yechengyu), 10 April 2004
I just start using TCL. I know this piece of code is going to print out something in a text window. But I can't figure out the set statement and the  "$w.f1.text yview moveto 1.0" meaning. Could anyone tell me the exact meaning and usage? Thanks a lot.
###############################################################
# Log ping/traceroute stats into a scrolling text window
###############################################################

proc print_session {s_id str} {
   global sessions
   if {[lsearch $sessions $s_id] == -1} {
     return;
   }
   set w .session$s_id
   $w.f1.text insert end "$str"
   $w.f1.text yview moveto 1.0
}

Posted by admin (Graham Ellis), 11 April 2004
The set command is just setting a variabole named w (that's how Tcl does assignments.  The yview moveto looks like it's setting a scollable text area back to showing you the top left of the text area.



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