bcarroll has asked for the wisdom of the Perl Monks concerning the following question:

Is it possible to execute a callback that is bound to a Tk::Button repeatedly, while the button is pressed?

I tried using the -repeatdelay and -repeatinterval options, but they didn't seem to do any thing.

use warnings;
use strict;
use Tk;

my $num = 0;

my $mw = tkinit();
my $button = $mw->Button(-text => $num)->pack();
$button->bind('<Button-1>', \&buttonPressed);
$mw->MainLoop();

sub buttonPressed{
    #this subroutine should be executed if the button is clicked once,
    #or repeatedly executed if the button is held down.
    print ".";
    $button->configure(-text =>    $num++);
}

[download]
  • Comment on Execute Tk::Button every X interval while button is pressed (and not released)
  • Download Code

Replies are listed 'Best First'.
Re: Execute Tk::Button every X interval while button is pressed (and not released)
by bcarroll (Pilgrim) on Feb 13, 2012 at 15:26 UTC

    I figured it out, without having to bind a callback to the button (using the "-command" option)

    use warnings;
use strict;
use Tk;

my $num = 0;

my $mw = tkinit();
my $button = $mw->Button(
    -text => $num,
    -repeatdelay => 25,
    -repeatinterval => 25,
    -command => sub{
        buttonPressed();
    }
)->pack();
$mw->MainLoop();

sub buttonPressed{
    #this subroutine will be executed if the button is clicked once,
    #or repeatedly executed if the button is held down.
    print ".";
    $button->configure(-text =>    $num++);
}

    [download]
[reply]
[d/l]
      use Tk;
sub w{ warn @_ }
tkinit->Button(
  qw/ -repeatdelay 25
-repeatinterval 25
-command /, \&w,
)->pack;
MainLoop;

      [download]
[reply]
[d/l]

Back to Seekers of Perl Wisdom