spivurno
2/21/2015 - 11:43 PM
Ounce of Talent // Gravity Forms // Bump Quantity Up Depending on Whether a Field is Checked
Ounce of Talent // Gravity Forms // Bump Quantity Up Depending on Whether a Field is Checked
<?php
/**
* Ounce of Talent // Gravity Forms // Bump Quantity Up Depending on Whether a Field is Checked
*
* A brief description about this snippet and the functionality it provides. Might also include basic usage instructions if applicable.
*
* @version 1.0
* @author David Smith <david@gravitywiz.com>
* @license GPL-2.0+
* @link http://gravitywiz.com/...
*/
class TT_GF_Quantity_Bump {
protected static $is_script_output = false;
public function __construct( $args = array() ) {
// set our default arguments, parse against the provided arguments, and store for use throughout the class
$this->_args = wp_parse_args( $args, array(
'form_id' => false,
'source_input_id' => false,
'target_input_id' => false
) );
// do version check in the init to make sure if GF is going to be loaded, it is already loaded
add_action( 'init', array( $this, 'init' ) );
}
function init() {
// make sure we're running the required minimum version of Gravity Forms
if( ! property_exists( 'GFCommon', 'version' ) || ! version_compare( GFCommon::$version, '1.8', '>=' ) ) {
return;
}
// time for hooks
add_filter( 'gform_pre_render', array( $this, 'load_form_script' ) );
add_filter( 'gform_register_init_scripts', array( $this, 'add_init_script' ) );
}
function load_form_script( $form ) {
if( $this->is_applicable_form( $form ) && ! self::$is_script_output ) {
$this->output_script();
}
return $form;
}
function output_script() {
?>
<script type="text/javascript">
( function( $ ) {
window.TTQuantityBump = function( args ) {
var self = this;
// copy all args to current object: (list expected props)
for( prop in args ) {
if( args.hasOwnProperty( prop ) )
self[prop] = args[prop];
}
self.init = function() {
var sourceIdBits = self.sourceInputId.split( '_' ),
sourceInputGroupSelector = '#input_' + self.formId + '_' + sourceIdBits[2] + ' input[name="input_' + sourceIdBits[2] + '"]';
$( document ).on( 'change', sourceInputGroupSelector, function() {
self.bump();
} );
};
self.bump = function() {
var $sourceInput = $( self.sourceInputId ),
$targetInput = $( self.targetInputId ),
isChecked = $sourceInput.is( ':checked' ),
wasChecked = $sourceInput.data( 'wasChecked' ),
hasChanged = isChecked != wasChecked,
currentValue = parseInt( $targetInput.val() ),
timeout = null;
if( ! isChecked && ! wasChecked ) {
return;
} else if( ! hasChanged ) {
clearTimeout( timeout );
timeout = setTimeout( function() {
self.bump();
}, 100 );
return;
} else {
$sourceInput.data( 'wasChecked', isChecked );
}
if( ! currentValue || isNaN( currentValue ) || currentValue < 0 ) {
currentValue = 0;
}
var newValue = currentValue + ( $sourceInput.is( ':checked' ) && $sourceInput.is( ':visible' ) ? 1 : -1 );
if( newValue < 0 ) {
newValue = 0;
}
$targetInput.val( newValue );
};
self.init();
}
} )( jQuery );
</script>
<?php
self::$is_script_output = true;
}
function add_init_script( $form ) {
if( ! $this->is_applicable_form( $form ) ) {
return;
}
$args = array(
'formId' => $this->_args['form_id'],
'sourceInputId' => $this->_args['source_input_id'],
'targetInputId' => $this->_args['target_input_id']
);
$script = 'new TTQuantityBump( ' . json_encode( $args ) . ' );';
$slug = implode( '_', array( 'tt_quantity_bump', $this->_args['form_id'], $this->_args['source_input_id'], $this->_args['target_input_id'] ) );
GFFormDisplay::add_init_script( $this->_args['form_id'], $slug, GFFormDisplay::ON_PAGE_RENDER, $script );
}
function is_applicable_form( $form ) {
$form_id = isset( $form['id'] ) ? $form['id'] : $form;
return $form_id == $this->_args['form_id'];
}
}
# Configuration
new TT_GF_Quantity_Bump( array(
'form_id' => 747,
'source_input_id' => '#choice_747_10_0',
'target_input_id' => '#ginput_quantity_747_7'
) );
new TT_GF_Quantity_Bump( array(
'form_id' => 747,
'source_input_id' => '#choice_747_10_1',
'target_input_id' => '#ginput_quantity_747_13'
) );
new TT_GF_Quantity_Bump( array(
'form_id' => 747,
'source_input_id' => '#choice_747_12_0',
'target_input_id' => '#ginput_quantity_747_7'
) );
new TT_GF_Quantity_Bump( array(
'form_id' => 747,
'source_input_id' => '#choice_747_12_1',
'target_input_id' => '#ginput_quantity_747_13'
) );