IntroductionSettings and PropertiesSettingsPropertiesHooksSource Code
Introduction
The GF_Field_Calculation class extends the GF_Field class, also known as the Field Object. This class is responsible for determining how the Calculation type Product field is rendered when the form is displayed and how its value is handled during and after form submission.
Settings and Properties
Settings control what options are available to the admin user when configuring the field in the form editor. Gravity Forms includes many built-in settings such as Field Label, Field Description, Choices, Conditional Logic, etc. In addition to built-in settings, custom settings can also be developed. For more information on how to develop custom settings and how to associate settings to a field, visit the GF_Field page.
Properties contain the values specified by the settings and generally are part of the Field Object.
The properties may be retrieved by accessing the Field Object as follows:
12345//get the field$field = GFFormsModel::get_field( $form, 1 ); //get the formula$formula = $field->calculationFormula;
Settings
The following settings are available for the field:
calculation_setting
Determines whether the 「Formula」 section displays. This section allows a formula to be entered, merge tags to be used, and the formula entered to be validated.
conditional_logic_field_setting
Controls whether the 「Enable Conditional Logic」 setting appears.
disable_quantity_setting
Determines whether the 「Disable quantity field」 checkbox appears. This allows the quantity to be removed from the field. A default value of 1 will be used, unless a separate Quantity field is added.
duplicate_setting
Controls whether the 「No Duplicates」 setting displays within the 「Rules」 section. This controls whether the same value may exist more than once in the database. The 「Rules」 setting must be active for this to display.
rules_setting
Controls whether the 「Rules」 settings section displays. The 「Required」 option shows when this is active.
Properties
Below is a listing of the properties inherited from the parent class and ones specific to the field.
adminLabel string
The label to be used on admin pages instead of the label, useful for fields with long labels.
allowsPrepopulate boolean
Determines if the field values can be dynamically populated. Default is false.
calculationFormula string
The formula to be used to calculate the price.
conditionalLogic array
An associative array containing the conditional logic rules. See the Conditional Logic Object for more details.
cssClass string
The custom CSS class or classes to be added to the input tag for the field.
enableCalculation boolean
Indicates whether the calculation use is active.
description string
The field description.
descriptionPlacement string
The placement of the field description. The description may be placed 「above」 or 「below」 the field inputs. If the placement is not specified, then the description placement setting for the Form Layout is used.
disableQuantity boolean
Indicates whether the Quantity field is active.
formId integer
The form ID.
id integer
The field ID.
inputs array
An array containing the the individual properties for each element of the single product field.
id integer
The id of the input field.
label string
The label for the input.
name string
The name of the parameter used for the input when dynamically populating the field.
An example of the array output is as follows:
1234567891011121314151617$inputs = array( array( 'id' => '1.1', 'label' => 'Product Name', 'name' => 'param_product' ), array( 'id' => '1.2', 'label' => 'Price', 'name' => 'param_price' ), array( 'id' => '1.3', 'label' => 'Quantity', 'name' => 'param_qty' ), )
inputType string
Specifies the sub-type of Product field being used. For instance, when the field is for a product, the 「type」 is set to product and the 「inputType」 is set to calculation. When the field is created, the type is initially set using the 「type」 property. If 「inputType」 is not empty, then the 「inputType」 is used to create the field instead.
isRequired boolean
Marking the field as required will prevent the form from being submitted if the user does not enter a value. Default is false.
label string
The field label that will be displayed on the form and on the admin pages.
noDuplicates boolean
Determines if the value entered by the user may already exist in the database.
type string
The field type, which in this case is product. The specific type of product field is in the 「inputType」 property.
Hooks
The following hooks are located in GF_Field_Calculation:
gform_product_quantity
gform_product_price
Source Code
The source code is located in includes/fields/class-gf-field-calculation.php in the Gravity Forms folder of your sites plugins directory.