class-gravityview-field-multiselect.php

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<?php
/**
 * @file class-gravityview-field-multiselect.php
 * @package GravityView
 * @subpackage includes\fields
 */

class GravityView_Field_MultiSelect extends GravityView_Field {

 var $name = 'multiselect';

 /**
 * @see GFCommon::get_field_filter_settings Gravity Forms suggests checkboxes should just be "contains"
 * @var array
 */
 var $search_operators = array( 'is', 'in', 'not in', 'isnot', 'contains');

 var $is_searchable = true;

 /** @see GF_Field_MultiSelect */
 var $_gf_field_class_name = 'GF_Field_MultiSelect';

 var $group = 'standard';

 var $icon = 'dashicons-editor-ul';

 public function __construct() {
 $this->label = esc_html__( 'Multi Select', 'gk-gravityview' );
 parent::__construct();
 }

 /**
 * Add `choice_display` setting to the field
 *
 * @param array $field_options
 * @param string $template_id
 * @param string $field_id
 * @param string $context
 * @param string $input_type
 *
 * @since 2.0
 *
 * @return array
 */
 public function field_options( $field_options, $template_id, $field_id, $context, $input_type, $form_id ) {

 // Set the $_field_id var
 $field_options = parent::field_options( $field_options, $template_id, $field_id, $context, $input_type, $form_id );

 if( $this->is_choice_value_enabled() ) {
 $field_options['choice_display'] = array(
 'type' => 'radio',
 'value' => 'value',
 'label' => __( 'What should be displayed:', 'gk-gravityview' ),
 'desc' => __( 'This input has a label and a value. What should be displayed?', 'gk-gravityview' ),
 'choices' => array(
 'value' => __( 'Value of the input', 'gk-gravityview' ),
 'label' => __( 'Label of the input', 'gk-gravityview' ),
 ),
 'group' => 'display',
 );
 }

 return $field_options;
 }
}

new GravityView_Field_MultiSelect;