Hi
I am trying to make a customized TK::Listbox using TK::canvas because I need the ability to change text color and font when <double-1>
here is my initial work: 
#!/usr/bin/perl
use warnings;
use strict;
use Tk;

my ($DimX,$DimY)=(400,600);
my ($mX,$mY) = (2,2);

my $mw = MainWindow->new( -bg=> "#000000", -borderwidth=> 0);
$mw->minsize( $DimX, $DimY );
$mw->maxsize( $DimX, $DimY );
my %canvas;
my $fontsize=int(20);
$canvas{'canvas'} = $mw->Scrolled(
    'Canvas', 
    -width => $DimX-2*$mX,
    -height => 2*$DimY,
    -bg => '#60C8BC',
    -borderwidth => 2,
    -relief => 'raised',
    -scrollbars => 'e',
    )->pack();

$canvas{'canvas'}->CanvasBind("<Button-1>", [ \&print_xy, Ev('x'), Ev(
+'y') ]);
sub print_xy {
    my ($canv, $x, $y) = @_;
    my $sel = int($canvas{'canvas'}->canvasy($y) / (1.4*$fontsize+2));
    printf "Selected: %d, (%d,%d)\n", $sel, $canvas{'canvas'}->canvasx
+($x),$canvas{'canvas'}->canvasy($y);

    $canvas{'text'}{$sel}->itemconfigure(
        -fill => '#0000FF',
        -font => "Courier $fontsize bold",
    );
}

for (my $y=0; $y<200; $y++) {
    $canvas{'text'}{$y} = $canvas{'canvas'}->createText( 5, 4+$y*(1.4*
+$fontsize+2),
        -fill => '#000000',
        -text => "GgYy".$y x 20,
        -font => "Courier $fontsize normal",
        -anchor => 'nw',
    );
}

MainLoop;

[download]
Problems:
1. I could not make the scrollbar scroll.
2. How do I change the selected item's font/color?
I tried doing this: 
    $canvas{'text'}{$sel}->itemconfigure(
        -fill => '#0000FF',
        -font => "Courier $fontsize bold",
    );

[download]
But it is not working.
3. lastly, how do I retrieve a particular selected text's font/color? Sorry folks, I am very rusty with perl after years of not programming.

Thanks BTW: My original (>10 years ago) script used TK::ROText; however in that version, the windows' size is fixed, and all entry in the ROText are space padded to cover the whole line (sprintf "%-50s", $text). Then using tag for each line. That was a nightmare, it was ugly programming. I am redoing that script to use Listbox; it was alot cleaner but I could not change font of selected text (line) thus I am redoing it with Canvas.

In reply to tk canvas text by jsteng

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