Dynamically Modify Checkbox/Radio Choices

Have a client who wants to use our plugin (an event calendar plugin) to dynamically list upcoming events in their Gravity Forms plugin for event registration. I took a look at GF and found this filter somewhat useful: gform_field_choices_# (where # is the form ID).

This is the sample code I came up with for him (without the specifics for my form):

function testing_gform_field_choices( $choices, $field ) {

		if ( 1 == $field['id'] ) { // 1 = the Field ID of the field you're wanting to modify.

			unset( $field['choices'] );

			$field['choices'][] = array(
				'text' 			=> 'Testing 1',
				'value'			=> 'Testing 1',
				'isSelected'	=> false,
				'price'			=> false
			);

			$field['choices'][] = array(
				'text' 			=> 'Testing 2',
				'value'			=> 'Testing 2',
				'isSelected'	=> false,
				'price'			=> false
			);
			$field['formId'] = 'DO_NOT_RUN'; // We don't want to get into an endless add_filter loop, so change the ID to someting useless.
			$choices = GFCommon::get_radio_choices( $field, '', '' ); // Rerun the GF script to make it look pretty again

		}

		return $choices;

	}
	add_filter( 'gform_field_choices_1', 'testing_gform_field_choices', 10, 2 ); // _1 = the FORM ID of the form you want to modify

So, I unset choices, add my "dynamic" choices, change the 'formID' to some junk value (so the filter doesn't run in an endless loop), get my new $choices variable and return it.

It would be great if there was a "pre_gfrom_field_choices" filter at the head of the get_radio_choices and get_checkbox_choices functions. One that simply let us modify the $field['choices'] array. Doing it this way doubles the work... not a huge deal, but would be a good addition tot he code.

Anyway, if that doesn't come to fruition, I hope the above code helps someone who wants to do something similar.

Lew Ayotte