tripal_jbrowse/tripal_jbrowse_page/includes/tripal_jbrowse_page.admin.inc

<?php
/**
 * @file
 * Administration (settings) for this module.
 */

/**
 * Settings Form for page integration.
 */
function tripal_jbrowse_page_settings_form($form, $form_state) {

  $form['general'] = [
    '#type' => 'fieldset',
    '#title' => 'General Page Integration Settings'
  ];

  $form['general']['embed'] = [
    '#type' => 'checkbox',
    '#title' => 'Embed JBrowse in your Tripal Site',
    '#description' => 'Check this box if you would like to embed the JBrowse in your Tripal site. Conversely, uncheck it for links to go directly to the full-screen JBrowse.',
  '#default_value' => variable_get('trpjbrowse_page_embed', 1),
  ];

  $form['exclude_fieldset'] = [
    '#type' => 'fieldset',
    '#title' => 'Exclude JBrowse Instances from Page Integration',
    '#description' => 'To exclude a JBrowse instance from page integration (i.e. no embedded page will be shown and it won\'t show up in the listing), check the checkbox below.',
  ];

  // Get all instances as an option to be excluded.
  $instances = tripal_jbrowse_mgmt_get_instances();
  $options = [];
  foreach ($instances as $instance) {
    $key = $instance->id;
    $options[$key] = [
      'genus' => $instance->organism->genus,
      'species' => $instance->organism->species,
      'analysis' => $instance->analysis->name ?? 'Not Provided',
      'description' => $instance->description,
    ];
  }
  // Determine the default value.
  $default_exclude = variable_get('trpjbrowse_page_exclude', []);
  if (!is_array($default_exclude)) {
    $default_exclude = unserialize($default_exclude);
  }
  // Now generate the table.
  $form['exclude_fieldset']['exclude'] = [
    '#type' => 'tableselect',
    '#header' => [
      'genus' => t('Genus'),
      'species' => t('Species'),
      'analysis' => t('Sequence Assembly'),
      'description' => t('Description')
    ],
    '#options' => $options,
    '#empty' => t('No JBrowse Instances available. Please add one through the "List Instances" page.'),
    '#default_value' => $default_exclude,
  ];

  $form['submit'] = [
    '#type' => 'submit',
    '#value' => 'Save Settings',
  ];

  return $form;
}

/**
 * Settings Form for page integration.
 */
function tripal_jbrowse_page_settings_form_submit($form, $form_state) {
  $values = $form_state['values'];
  // General Settings.
  variable_set(
    'trpjbrowse_page_embed',
    $values['embed']
  );

  // Exclude Instances.
  variable_set(
    'trpjbrowse_page_exclude',
    serialize($values['exclude'])
  );

  // Ensure the menu is rebuilt.
  variable_set('menu_rebuild_needed', TRUE);

}