Hi,

I have a GUI with a text window, in which I sometimes want to delete a chunk of text and insert different text in its place. I'm using something like this: 
$text->delete($start_index,$end_index);
$text->insert($start_index,$my_new_text);

[download]
(Both $start_index and $end_index always look like '###.0'.)

This works fine as long as $end_index is somewhere in the middle of the whole text. However, if $end_index is actually the same as 'end',
the new text isn't inserted after a newline, but rather at the end of the previous line.

Is there a way to prevent this? (Other than checking if I'm inserting text in the end, and then adding a newline myself...)

Here is a sample code that I wrote to demonstrate the problem: 
use strict; 
use Tk;

my $mw = MainWindow->new();

my $frame = $mw->Frame()
    ->pack(-side => "left", 
       -expand => 1,
       -fill => 'both');

my $text = $frame->Scrolled('Text')
    ->pack(-expand => 1,
       -fill => 'both');

my $data;
for (my $i = 1; $i < 20; $i++) {
    $data .= "abcdefghi $i \n";
}
$text->insert('end',$data);

my $but1 = $frame->Button(-text => "Replace in the middle",
              -command => [\&replace,$text,'3.0','7.0'])
    ->pack(-side => 'left');

my $but2 = $frame->Button(-text => "Replace in the end",
              -command => [\&replace,$text,'16.0','end'])
    ->pack(-side => 'left');

MainLoop(); 

sub replace {
    my ($text,$start_index,$end_index) = @_;
    my $old_data = $text->get($start_index,$end_index);
    $old_data =~ s/cdefg/12345/g;
    $text->delete($start_index,$end_index);
    $text->insert($start_index,$old_data);
    return;
}

[download]
Thanks a lot!

In reply to Indices and inserts in Tk::Text by anna_black

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