<?php

class HandleVars {
    /** @var UIWindow */
    public $root;

    /** @var UICombobox */
    public $cb;
}

UIManager::setLookAndFeel(UIManager::getSystemLookAndFeel());
SwingUtilities::invokeLater(function(){
    $reader = new XmlUIReader();
    $ui = new \HandleVars();

    $source = new ResourceStream("forms/form1.xml");
    $form = $reader->read($source, function(UIElement $el, $var) use ($ui) {
        $ui->{$var} = $el;
    });
    print_r($form);

    $ui->root->moveToCenter();
    $ui->root->visible = true;
});

/////////////////////

class HandleVars
{
    /**
     * @var UIWindow
     */
    public $root;

    /**
     * @var UICombobox
     */
    public $cb;
}

UIManager::setLookAndFeel(UIManager::getSystemLookAndFeel());
SwingUtilities::invokeLater(function() {
    $reader = new XmlUIReader();
    $ui = new \HandleVars();

    $source = new ResourceStream("forms/form1.xml");
    $form = $reader->read(
        $source,
        function (UIElement $el, $var) use ($ui) {
            $ui->{$var} = $el;
        }
    );
    print_r($form);

    $ui->root->moveToCenter();
    $ui->root->visible = true;
});