Demonstrates sortable set of checkboxes with different labels in Admin Page Framework.

apf-test-sortable-checkboxes.php

<?php
/**
 * Plugin Name: APF - Sortable Checkboxes
 */


class APFTest_SortableCheckboxesBootstrap {
    
    static public $sFilePath = __FILE__;
    
    public function __construct() {
        
        add_action( 'plugins_loaded', array( $this, 'loadPlugin' ) );
        
    }
    
    public function loadPlugin() {
        
        include( dirname( __FILE__ ) . '/APFTest_SortableCheckboxes.php' );
        
    }
    
}
new APFTest_SortableCheckboxesBootstrap;

APFTest_SortableCheckboxes.php

<?php
class APFTest_SortableCheckboxes extends AdminPageFramework {

    public function setUp() {
        
        // To reset the options uncomment the next line.
        // delete_option( get_class( $this ) );
        
        $this->setRootMenuPage( __( 'Sortable Checkboxes', 'apf-test-sortable-checkboxes' ) );

        $this->addSubMenuItems(
            array(
                'title'         =>  __( 'Settings', 'apf-test-sortable-checkboxes' ),
                'page_slug'     =>  'apftsc_settings'
            )
        );
        
    }

    public function do_apftsc_settings( $oFactory ) {
        echo "<h3>Saved Data</h3>";
        AdminPageFramework_Debug::dump( $this->oProp->aOptions );
    }
    
    public function load_apftsc_settings( $oFactory ) {
        
        // Section
        $oFactory->addSettingSections(    
            'apftsc_settings', // the target page slug                
            array(
                'section_id'       => 'sortable_checkboxes_section',
                'title'            => __( 'Sortable Checkboxes', 'apf-test-sortable-checkboxes' ),
            )
        ); 
        
        $oFactory->addSettingFields(
            'sortable_checkboxes_section', // the target section ID       
            array(
                'field_id'      => 'checkbox_number_select',
                'type'          => 'inline_mixed',
                'title'         => __( 'Checkbox, Number & Select', 'admin-page-framework-loader' ),            
                'sortable'      => true,
                'content'       => $this->___getFirstRowCheckboxes(),
                array(  // Second field
                    'content'       => $this->___getSecondRowCheckboxes(),
                ),
                array(  // Third field
                    'content'       => $this->___getThirdRowCheckboxes(),                
                ),                
            ),
            array(
                'field_id'  => '_submit',
                'type'      => 'submit',
                'save'      => false,
                'show_title_column' => false,
            )
        );
    }
        private function ___getFirstRowCheckboxes() {
            $_aSavedCheckboxes = $this->oUtil->getElement( 
                $this->oProp->aOptions, 
                array( 'sortable_checkboxes_section', 'checkbox_number_select', 0 ),
                array(
                    'a' => 0,   
                    'b' => 1,       // checked
                    'c' => 0,   
                )
            );
            return $this->___getCheckboxLabels( $_aSavedCheckboxes );
            
        }
        private function ___getSecondRowCheckboxes() {
            $_aSavedCheckboxes = $this->oUtil->getElement( 
                $this->oProp->aOptions, 
                array( 'sortable_checkboxes_section', 'checkbox_number_select', 1 ),
                array(
                    'x' => 0,   
                    'y' => 0,   
                    'z' => 1,   
                )               
            );
            return $this->___getCheckboxLabels( $_aSavedCheckboxes );
        }        
        private function ___getThirdRowCheckboxes() {
            $_aSavedCheckboxes = $this->oUtil->getElement( 
                $this->oProp->aOptions, 
                array( 'sortable_checkboxes_section', 'checkbox_number_select', 2 ),
                array(
                    'one'   => 1,   
                    'two'   => 1,   
                    'three' => 0,   
                )            
            );
            return $this->___getCheckboxLabels( $_aSavedCheckboxes );
        }   

            private function ___getCheckboxLabels( array $aSavedCheckboxes ) {
                $_aCheckboxes = array();
                foreach( $aSavedCheckboxes as $_sKey => $_iValue ) {
                    $_aCheckboxes[] = array(
                        'field_id'  => $_sKey,
                        'type'      => 'checkbox',
                        'label'     => $this->___getCheckboxLabelByKey( $_sKey ),
                        'value'     => $_iValue,
                    );
                }
                return $_aCheckboxes;
            }
                private function ___getCheckboxLabelByKey( $sKey ) {
                    $_aLabels = array(
                        'a' => 'A',
                        'b' => 'B',
                        'c' => 'C',
                        'x' => 'X',
                        'y' => 'Y',
                        'z' => 'Z',
                        'one' => 'One',
                        'two' => 'Two',
                        'three' => 'Three',
                    );
                    return isset( $_aLabels[ $sKey ] )
                        ? $_aLabels[ $sKey ]
                        : '';
                    
                }
}

new APFTest_SortableCheckboxes( null, APFTest_SortableCheckboxesBootstrap::$sFilePath );