This example changes the callback associated with a menu item based on the active tab of a Notebook.
use strict;
use Tk;
use Tk::Notebook;
my $main = MainWindow->new;
my $menubar = $main->Menu();
# Default is never used
my $execute = \&default;
$main->configure(-menu => $menubar,
);
my $menu = $menubar->cascade(-label => '~File',
-menuitems => [
['command', 'Execute', -command => \$exec
+ute],
['command', '~Exit', -command => sub{$main
+->destroy}],
]
);
my $notebook = $main->NoteBook();
# Execute menu item changes with each tab
my $tab1 =$notebook->add("tab1",
-label => "Tab 1",
-raisecmd => sub{ $execute = \&tab1 },
);
my $tab2 =$notebook->add("tab2",
-label => "Tab 2",
-raisecmd => sub{ $execute = \&tab2 },
);
$notebook->pack();
MainLoop;
sub default{
print "Default\n";
}
sub tab1{
print "Tab1\n";
}
sub tab2{
print "Tab2\n";
}
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