47 lines
1.8 KiB
Plaintext
47 lines
1.8 KiB
Plaintext
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'\"
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'\" Copyright (c) 1992 The Regents of the University of California.
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'\" Copyright (c) 1994 Sun Microsystems, Inc.
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'\"
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'\" See the file "license.terms" for information on usage and redistribution
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'\" of this file, and for a DISCLAIMER OF ALL WARRANTIES.
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'\"
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'\" @(#) tkwait.n 1.10 95/08/12 17:35:23
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'\"
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.so STk-man.macros
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.TH tkwait n 3.1 STk "Tk Built-In Commands"
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.BS
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'\" Note: do not modify the .SH NAME line immediately below!
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.SH NAME
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tkwait \- Wait for variable to change or window to be destroyed
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.SH SYNOPSIS
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(\fBtkwait 'variable \fIname\fR)
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.sp
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(\fBtkwait 'visibility \fIname\fR)
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.sp
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(\fBtkwait 'window \fIname\fR)
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.BE
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.SH DESCRIPTION
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.PP
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The \fBtkwait\fR procedure waits for one of several things to happen,
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then it returns without taking any other actions.
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The return value is always an empty string.
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If the first argument is \fBvariable\fR (or any abbreviation of
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it) then the second argument is the name of a global variable and the
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procedure waits for that variable to be modified.
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If the first argument is \fBvisibility\fR (or any abbreviation
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of it) then the second argument is the name of a window and the
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\fBtkwait\fR procedure waits for a change in its
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visibility state (as indicated by the arrival of a VisibilityNotify
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event). This form is typically used to wait for a newly-created
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window to appear on the screen before taking some action.
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If the first argument is \fBwindow\fR (or any abbreviation
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of it) then the second argument is the name of a window and the
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\fBtkwait\fR procedure waits for that window to be destroyed.
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This form is typically used to wait for a user to finish interacting
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with a dialog box before using the result of that interaction.
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.PP
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While the \fBtkwait\fR procedure is waiting it processes events in
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the normal fashion, so the application will continue to respond
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to user interactions.
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