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

Hi, I am trying to make a script where it is possible to use the enter key same as pressing a command button, but only if the entry widget has focus. So that is what i am trying to determine. Here is my code, i just put this together because i am writing a larger program.

use strict;
use warnings;
use Tk;

my $mw = new MainWindow;
my $text = $mw->Scrolled("Text", -scrollbars => 'e')->pack(-side=>'bot
+tom',-anchor=>'w');
my $label = $mw->Label(-text=>"hello")->pack(-side=>'left',-anchor=>'n
+');
my $entry = $mw->Entry()->pack(-side=>'left',-anchor=>'n');
$mw->bind('<Key-Return>',\&verwijs);
$entry->focus;

MainLoop; 

sub verwijs{
my $who = $mw->focusCurrent;
print %$who;
}

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The output = "_TkValue_.entry_XEvent_XEvent=SCALAR(0x1ffc334)". So this means the entry widget had focus, but how do i write this an test for it? I can't find any documentation. Thank you.

Replies are listed 'Best First'.
Re: [Tk] use enter key iso command button
by tybalt89 (Monsignor) on Jan 25, 2020 at 15:30 UTC 
    #!/usr/bin/perl

use strict; # https://perlmonks.org/?node_id=11111879
use warnings;
use Tk;

my $mw = new MainWindow;
my $text = $mw->Scrolled("Text", -scrollbars => 'e'
  )->pack(-side=>'bottom',-anchor=>'w');
my $label = $mw->Label(-text=>"hello")->pack(-side=>'left',-anchor=>'n
+');
my $entry = $mw->Entry()->pack(-side=>'left',-anchor=>'n');
#$mw->bind('<Key-Return>',\&verwijs);
$entry->bind('<Key-Return>',\&verwijs);
$entry->focus;

MainLoop;

sub verwijs
  {
  my $who = $mw->focusCurrent;
  print %$who;
  }

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[d/l]

      Much better, thank you.

[reply]

      Secrets 

      #!/usr/bin/perl --
# Tk-event-secrets.pl
# 
# 2020-01-25-21:28:48
# 
# https://perlmonks.org/?node_id=11111879
# 
# 
#!/usr/bin/perl --
use strict;
use warnings;
use Tk;

my $mw = new MainWindow;
my $text = $mw->Scrolled(
    "Text",
    -scrollbars => 'e',
)->pack(
    -side => 'bottom',
    -anchor => 'w',
);
my $label = $mw->Label(
    -text => "hello"
)->pack(
    -side => 'left',
    -anchor => 'n',
);
my $entry = $mw->Entry()->pack(
    -side => 'left',
    -anchor => 'n',
);

#~ $text->bind('<Key-Return>',\&verwijs);
#~ $entry->bind('<Key-Return>',\&verwijs);
$mw->bind( '<Key-Return>', \&verwijs );
$entry->focus;

#~ $mw->WidgetDump;
MainLoop;

sub verwijs {
    printf "## %30s %s\n", '@_',           "@_";
    printf "## %30s %s\n", '$Tk::widget',  $Tk::widget;
    printf "## %30s %s\n", 'Tk::event->W', $Tk::event->W;
    printf "## %30s %s\n", 'Tk::event',    $Tk::event;
    printf "## %30s %s\n", '$mw->focusCurrent',
      $Tk::widget->toplevel->focusCurrent;
    printf "## %30s %s\n", $mw, $Tk::widget->toplevel;
    print "\n\n";
}

__END__
$ perl Tk-event-secrets.pl
##                             @_ Tk::Entry=HASH(0x102ff2c)
##                    $Tk::widget Tk::Entry=HASH(0x102ff2c)
##                   Tk::event->W Tk::Entry=HASH(0x102ff2c)
##                      Tk::event XEvent=SCALAR(0x101099c)
##              $mw->focusCurrent Tk::Entry=HASH(0x102ff2c)
##      MainWindow=HASH(0xf3ad8c) MainWindow=HASH(0xf3ad8c)


##                             @_ Tk::Text=HASH(0xf20334)
##                    $Tk::widget Tk::Text=HASH(0xf20334)
##                   Tk::event->W Tk::Text=HASH(0xf20334)
##                      Tk::event XEvent=SCALAR(0x1010b9c)
##              $mw->focusCurrent Tk::Text=HASH(0xf20334)
##      MainWindow=HASH(0xf3ad8c) MainWindow=HASH(0xf3ad8c)


##                             @_ Tk::Scrollbar=HASH(0x10212d4)
##                    $Tk::widget Tk::Scrollbar=HASH(0x10212d4)
##                   Tk::event->W Tk::Scrollbar=HASH(0x10212d4)
##                      Tk::event XEvent=SCALAR(0x106d6e4)
##              $mw->focusCurrent Tk::Scrollbar=HASH(0x10212d4)
##      MainWindow=HASH(0xf3ad8c) MainWindow=HASH(0xf3ad8c)

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