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:
//get the field $field = GFFormsModel::get_field( $form, 1 ); //get the formula $formula = $field->calculationFormula;
The following settings are available for the field:
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.
Controls whether the “Enable Conditional Logic” setting appears.
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.
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.
Controls whether the “Rules” settings section displays. The “Required” option shows when this is active.
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.
Determines if the field values can be dynamically populated. Default is false.
The formula to be used to calculate the price.
An associative array containing the conditional logic rules. See the Conditional Logic Object for more details.
The custom CSS class or classes to be added to the input tag for the field.
Indicates whether the calculation use is active.
The field description.
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.
Indicates whether the Quantity field is active.
The form ID.
The field ID.
An array containing the the individual properties for each element of the single product field.
- id integer
The id of the input field.
The label for the input.
The name of the parameter used for the input when dynamically populating the field.
An example of the array output is as follows:
$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' ), )
- id integer
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.
Marking the field as required will prevent the form from being submitted if the user does not enter a value. Default is false.
The field label that will be displayed on the form and on the admin pages.
Determines if the value entered by the user may already exist in the database.
The field type, which in this case is product. The specific type of product field is in the “inputType” property.
The following hooks are located in GF_Field_Calculation:
The source code is located in includes/fields/class-gf-field-calculation.php in the Gravity Forms folder of your sites plugins directory.