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Entering data using a TKperl widget

Posted on 1999-07-07
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Last Modified: 2010-03-04
What is the best way to Input data into a perl script using a TKperl widget. (something analogical to: $some_parameter = <stdin>;)
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Question by:ronpo
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4 Comments
 
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Expert Comment

by:thoellri
ID: 1213921
Huh, are you trying to retrieve the value from a TK widget?


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Author Comment

by:ronpo
ID: 1213922
Actually Yes, i'm trying to assign a value to a parameter using a TkPerl widget. By now I could only figure out how to enter and edit text in a text wigdet but I couldn't assign it to a parameter (there is no command property in the Text or Entry widgets).

Thanks.
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Accepted Solution

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Mikky earned 400 total points
ID: 1213923
Let's suppose that your parameter is stored in $parm.
Why don't you create an Entry widget as follows:

my $entry = $widget->Entry(-textvariable=>\$parm);

This way $parm is automagically updated whenever the text in the Entry widget is changed by the user.  If it is initially undefined and you want to act on it when the user is finished filling it in, then you may also want to define a button so the user can tell your program when the entry has been filled in.  Otherwise, simply checking periodically whether it has become defined may result in grabbing a partial input before all the input has been specified.

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Author Comment

by:ronpo
ID: 1213924
Thanks Mikky, it works.
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