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tkwait(3Tk)							   tkwait(3Tk)


NAME    [Toc]    [Back]

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

SYNOPSIS    [Toc]    [Back]

     tkwait variable name
     tkwait visibility name
     tkwait window name

DESCRIPTION    [Toc]    [Back]

     The tkwait	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 variable (or any abbreviation 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
     visibility	(or any	abbreviation of	it) then the second argument is	the
     name of a window and the tkwait command waits for a change	in its
     visibility	state (as indicated by the arrival of a	VisibilityNotify
     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	window (or any abbreviation of it) then	the second argument is the
     name of a window and the tkwait 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 tkwait command is waiting it processes events in	the normal
     fashion, so the application will continue to respond to user
     interactions.

KEYWORDS    [Toc]    [Back]

     variable, visibility, wait, window


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