File: ewidth_demo

package info (click to toggle)
perl-tk 1:800.025-2
  • links: PTS
  • area: main
  • in suites: sarge
  • size: 18,444 kB
  • ctags: 19,081
  • sloc: ansic: 206,740; perl: 40,187; makefile: 4,371; sh: 2,373; yacc: 762
file content (36 lines) | stat: -rw-r--r-- 500 bytes parent folder | download | duplicates (5)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
#!/usr/local/bin/perl -w
use Tk;
use strict;

{
package Tk::LimitEntry;
require Tk::Entry;
@Tk::LimitEntry::ISA = qw(Tk::Entry);
 
Construct Tk::Widget 'LimitEntry';

sub Insert
{
 my ($w,$char) = @_;
 my $width = $w->cget('width');
 my $len   = $w->index('end');
 if ($len >= $width)
  {
   $w->bell;
  }
 else
  {
   $w->SUPER::Insert($char);
  }
}


}


my $mw = MainWindow->new;
my $var = "";
my $e  = $mw->LimitEntry(-width => 8, -textvariable => \$var)->pack;
$mw->update;
$e->focus;
MainLoop;