raku-rosettacode/programming_tasks/G/GUI_component_interaction.md

GUI component interaction

use GTK::Simple;
use GTK::Simple::App;
 
my GTK::Simple::App $app .= new(title => 'GUI component interaction');
 
$app.set-content(
    my $box = GTK::Simple::VBox.new(
        my $value     = GTK::Simple::Entry.new(text => '0'),
        my $increment = GTK::Simple::Button.new(label => 'Increment'),
        my $random    = GTK::Simple::Button.new(label => 'Random'),
    )
);
 
$app.size-request(400, 100);
$app.border-width = 20;
$box.spacing = 10;
 
$value.changed.tap: {
    ($value.text ||= '0') ~~ s:g/<-[0..9]>//;
}
 
$increment.clicked.tap: {
    my $val = $value.text; $val += 1; $value.text = $val.Str
}
 
$random.clicked.tap: {
    # Dirty hack to work around the fact that GTK::Simple doesn't provide
    # access to GTK message dialogs yet :P
    if run «zenity --question --text "Reset to random value?"» {
        $value.text = (^100).pick.Str
    }
}
 
$app.run;