tkwait(n) Tk Built-In Commands tkwait(n)

NAME
       tkwait - Wait for variable to change or window to be destroyed

SYNOPSIS
       ttkkwwaaiitt vvaarriiaabbllee name

       ttkkwwaaiitt vviissiibbiilliittyy name

       ttkkwwaaiitt wwiinnddooww name



DESCRIPTION
       The  ttkkwwaaiitt  command waits for one of several things to happen, then it
       returns without taking any other actions.  The return value  is  always
       an  empty  string.  If the first argument is vvaarriiaabbllee (or any abbrevia-
       tion of it) then the second argument is the name of a  global  variable
       and  the  command waits for that variable to be modified.  If the first
       argument is vviissiibbiilliittyy (or any abbreviation  of  it)  then  the  second
       argument  is  the  name  of a window and the ttkkwwaaiitt command waits for a
       change in its visibility state (as indicated by the arrival of a  Visi-
       bilityNotify  event).  This form is typically used to wait for a newly-
       created window to appear on the screen before taking some  action.   If
       the  first argument is wwiinnddooww (or any abbreviation of it) then the sec-
       ond argument is the name of a window and the ttkkwwaaiitt command  waits  for
       that window to be destroyed.  This form is typically used to wait for a
       user to finish interacting with a dialog box before using the result of
       that interaction.

       While  the  ttkkwwaaiitt command is waiting it processes events in the normal
       fashion, so the application will continue to respond to  user  interac-
       tions.   If  an  event handler invokes ttkkwwaaiitt again, the nested call to
       ttkkwwaaiitt must complete before the outer call can complete.


KKEEYYWWOORRDDSS
       variable, visibility, wait, window



Tk                                                                   tkwait(n)