edit.php

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<?php
// dashboard widget has type parameter
if (elgg_in_context('dashboard')) {
    if (!isset($vars['entity']->content_type)) {
        $vars['entity']->content_type = 'friends';
    }
    $params = array(
        'name' => 'params[content_type]',
        'value' => $vars['entity']->content_type,
        'options_values' => array(
            'friends' => elgg_echo('river:widgets:friends'),
            'all' => elgg_echo('river:widgets:all'),
        ),
    );
    $type_dropdown = elgg_view('input/select', $params);
    ?>
    <div>
        <?php echo elgg_echo('river:widget:type'); ?>:
        <?php echo $type_dropdown; ?>
    </div>
    <?php
}

$num_display = sanitize_int($vars['entity']->num_display, false);
// set default value for display number
if (!$num_display) {
    $num_display = 8;
}

$params = array(
    'name' => 'params[num_display]',
    'value' => $num_display,
    'options' => array(5, 8, 10, 12, 15, 20),
);
$num_dropdown = elgg_view('input/select', $params);

?>
<div>
    <?php echo elgg_echo('widget:numbertodisplay'); ?>:
    <?php echo $num_dropdown; ?>
</div>

<?php
// pass the context so we have the correct output upon save.
if (elgg_in_context('dashboard')) {
    $context = 'dashboard';
} else {
    $context = 'profile';
}

echo elgg_view('input/hidden', array(
    'name' => 'context',
    'value' => $context
));