mirror of
https://github.com/silverstripe/silverstripe-framework
synced 2024-10-22 14:05:37 +02:00
97 lines
2.3 KiB
PHP
97 lines
2.3 KiB
PHP
<?php
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/**
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* Grouped dropdown, using <optgroup> tags.
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*
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* $source parameter (from DropdownField) must be a two dimensional array.
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* The first level of the array is used for the <optgroup>, and the second
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* level are the <options> for each group.
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*
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* Returns a <select> tag containing all the appropriate <option> tags, with
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* <optgroup> tags around the <option> tags as required.
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*
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* <b>Usage</b>
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*
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* <code>
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* new GroupedDropdownField(
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* $name = "dropdown",
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* $title = "Simple Grouped Dropdown",
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* $source = array(
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* "numbers" => array(
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* "1" => "1",
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* "2" => "2",
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* "3" => "3",
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* "4" => "4"
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* ),
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* "letters" => array(
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* "1" => "A",
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* "2" => "B",
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* "3" => "C",
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* "4" => "D",
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* "5" => "E",
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* "6" => "F"
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* )
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* )
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* )
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* </code>
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*
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* <b>Disabling individual items</b>
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*
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* Unlike the source, disabled items are specified in the same way as
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* normal DropdownFields, using a single value list. Don't pass in grouped
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* values here.
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*
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* <code>
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* // Disables first and third option in each group
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* $groupedDrDownField->setDisabledItems(array("1", "3"))
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* </code>
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*
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* @package forms
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* @subpackage fields-basic
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*/
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class GroupedDropdownField extends DropdownField {
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/**
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* Build a potentially nested fieldgroup
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*
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* @param mixed $valueOrGroup Value of item, or title of group
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* @param string|array $titleOrOptions Title of item, or options in grouip
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* @return ArrayData Data for this item
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*/
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protected function getFieldOption($valueOrGroup, $titleOrOptions) {
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// Return flat option
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if(!is_array($titleOrOptions)) {
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return parent::getFieldOption($valueOrGroup, $titleOrOptions);
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}
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// Build children from options list
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$options = new ArrayList();
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foreach($titleOrOptions as $childValue => $childTitle) {
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$options->push($this->getFieldOption($childValue, $childTitle));
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}
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return new ArrayData(array(
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'Title' => $valueOrGroup,
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'Options' => $options
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));
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}
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public function Type() {
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return 'groupeddropdown dropdown';
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}
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public function getSourceValues() {
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// Flatten values
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$values = array();
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$source = $this->getSource();
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array_walk_recursive(
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$source,
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// Function to extract value from array key
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function($title, $value) use (&$values) {
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$values[] = $value;
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}
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);
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return $values;
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}
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}
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