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Re: Trying to update a Tk:ROText widget as input is received from a backticked program

by leriksen (Curate)
on Nov 12, 2004 at 02:23 UTC ( #407247=note: print w/ replies, xml ) Need Help??


in reply to Trying to update a Tk:ROText widget as input is received from a backticked program

According to How to display lines to tk text box in real time the update should work. Here's the counter generator from that link

use strict; use Tk; use Tk::ROText; my $main = MainWindow->new; my $b = $main->Button(-text => 'count', -command => \&count )->pack; my $t = $main->ROText(width => 80, height => 10) ->pack(); MainLoop; sub count { my $i = 0; my $count; while ($i<20) { $t->insert("end", "Line $i\n"); $t->update(); sleep 1; $i++; } }
Works on my "This is perl, v5.8.0 built for i386-linux-thread-multi" and "Red Hat Linux release 9 (Shrike)"

Not sure if a process would change that - cant see why, your in the loop with a new value for $_, so should just work. I'll try here to with something like 'cat $0' so I place my own code in the tk window - ok, done - worked fine. Can you give anymore info ? Does the process return any blank lines - they could be hard to see :P

use brain;


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Re^2: Trying to update a Tk:ROText widget as input is received from a backticked program
by Anonymous Monk on Nov 12, 2004 at 22:06 UTC
    The main difference is $t->update() in this prog. RULE: After insert call update for realtime.

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