drilldown.php

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<?php
function drilldown()
{
    global $DIC;
    $f = $DIC->ui()->factory();
    $renderer = $DIC->ui()->renderer();


    $ico = $f->symbol()->icon()->standard('', '')->withSize('medium')->withAbbreviation('+');

    $image = $f->image()->responsive("src/UI/examples/Image/mountains.jpg", "Image source: https://stocksnap.io, Creative Commons CC0 license");
    $page = $f->modal()->lightboxImagePage($image, 'Mountains');
    $modal = $f->modal()->lightbox($page);

    $button = $f->button()->bulky($ico->withAbbreviation('>'), 'Modal', '')
        ->withOnClick($modal->getShowSignal());

    $label = $f->button()->bulky($ico->withAbbreviation('0'), 'root', '');

    $uri = new \ILIAS\Data\URI('https://ilias.de');
    $link = $f->link()->bulky($ico->withAbbreviation('>>'), 'link', $uri);

    $items = [
        $f->menu()->sub(toBulky('1'), [
            $f->menu()->sub(
                toBulky('1.1'),
                [$button, $link]
            )
                ->withInitiallyActive(),
            $f->menu()->sub(toBulky('1.2'), [
                $f->menu()->sub('1.2.1', [$button]),
                $f->menu()->sub('1.2.2', [$button])
            ]),
            $button
        ]),

        $f->menu()->sub(toBulky('2'), [
            $f->menu()->sub('2.1', [$button]),
            $f->menu()->sub('2.2', [$button]),
            $f->divider()->horizontal(),
            $f->menu()->sub('2.3', [$button])
        ])
    ];

    $dd = $f->menu()->drilldown($label, $items);

    return $renderer->render([
        $dd,
        $modal
    ]);
}


function toBulky(string $label) : \ILIAS\UI\Component\Button\Bulky
{
    global $DIC;
    $f = $DIC->ui()->factory();
    $ico = $f->symbol()->icon()->standard('', '')
        ->withSize('medium')
        ->withAbbreviation('+');

    return $f->button()->bulky($ico, $label, '');
}