The script below is a crude attempt to adds bullets to selected lines in a Text widget.

Is there was a way to make the bullets read only? If the bullets need to be removed the format (tags) should be removed (sub not shown) not by just deleting the bullets.

What is the best way to do this?


#!/bin/perl5

use strict;
use warnings;
use Tk;

my $mw = MainWindow->new(-title => 'bullets');
my $t = $mw->Text->pack;

{   local $/ = undef;
    $t->insert('1.0', <DATA>); }
    
$t->tagConfigure(
  'bullets',
  -lmargin1 => '30',
  -lmargin2 => '61',
);
$mw->Button(-text => 'bullet', -command => \&bullets)->pack;
MainLoop;

sub bullets{
  unless ($t->tagRanges('sel')){
    print "Can't apply bullets - no text selected\n";
    return;
  }
  my $first_index = $t->index('sel.first');
  my $last_index  = $t->index('sel.last');
  my $first_line = line_number($first_index);
  my $last_line = line_number($last_index);
  $t->unselectAll;
  for my $line ($first_line..$last_line){
    $t->GotoLineNumber($line);
    $t->insert("$line.0", "*      ");
  }
  $t->tagAdd('bullets', "$first_index linestart", "$last_index  lineen
+d");
  return;
}

sub line_number{
  my $index = shift;
  my ($line) = $index =~ /^(\d+)\./;
  return $line;
}
__DATA__
Twas brillig, and the slithy toves
Did gyre and gimble in the wabe:
All mimsy were the borogoves,
And the mome raths outgrabe.

[download]

In reply to Tk::Text widgets and bulleted lists by wfsp

Title:
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