lines 917 - 953

admin.inc

// Add preview controls
    $form['displays']['preview_controls'] = array(
      '#theme_wrappers' => array('container'),
    );


    // Add a checkbox controlling whether or not this display auto-previews.
    $form['displays']['preview_controls']['live_preview'] = array(
      '#type' => 'checkbox',
      '#title' => t('Auto preview'),
      '#default_value' => !variable_get('views_ui_disable_live_preview', 0),
    );

    $form['displays']['preview_controls']['form'] = array(
      '#theme_wrappers' => array('container'),
      '#attributes' => array('class' => array('arguments-preview')),
      '#process' => array('ctools_dependent_process'),
      '#dependency' => array('edit-displays-live-preview' => array(0)),
      '#id' => 'preview-form',
    );

    $form['displays']['preview_controls']['form']['view_args'] = array(
      '#type' => 'textfield',
      '#title' => t('Arguments'),
      '#description' => t('Separate arguments with a / as though they were a URL path.'),
      '#id' => 'preview-args',
    );

    $form['displays']['preview_controls']['form']['button'] = array(
      '#type' => 'submit',
      '#value' => t('Preview'),
      '#id' => 'preview-submit',
      '#ajax' => array(
        'callback' => 'views_ui_preview_callback',
        'wrapper' => 'views-live-preview',
      ),
    );

gistfile2.txt