1tkwait(n) Tk Built-In Commands tkwait(n)
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8 tkwait - Wait for variable to change or window to be destroyed
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11 tkwait variable name
12 tkwait visibility name
14 tkwait window name
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20 The tkwait command waits for one of several things to happen, then it
21 returns without taking any other actions. The return value is always
22 an empty string. If the first argument is variable (or any abbrevia‐
23 tion of it) then the second argument is the name of a global variable
24 and the command waits for that variable to be modified. If the first
25 argument is visibility (or any abbreviation of it) then the second
26 argument is the name of a window and the tkwait command waits for a
27 change in its visibility state (as indicated by the arrival of a Visi‐
28 bilityNotify event). This form is typically used to wait for a newly-
29 created window to appear on the screen before taking some action. If
30 the first argument is window (or any abbreviation of it) then the sec‐
31 ond argument is the name of a window and the tkwait command waits for
32 that window to be destroyed. This form is typically used to wait for a
33 user to finish interacting with a dialog box before using the result of
34 that interaction.
35 While the tkwait command is waiting it processes events in the normal
37 fashion, so the application will continue to respond to user interac‐
38 tions. If an event handler invokes tkwait again, the nested call to
39 tkwait must complete before the outer call can complete.
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43 variable, visibility, wait, window
44Tk tkwait(n)