silverstripe-framework/forms/GroupedDropdownField.php

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<?php
/**
* Grouped dropdown, using <optgroup> tags.
*
* $source parameter (from DropdownField) must be a two dimensional array.
* The first level of the array is used for the <optgroup>, and the second
* level are the <options> for each group.
*
* Returns a <select> tag containing all the appropriate <option> tags, with
* <optgroup> tags around the <option> tags as required.
*
* <b>Usage</b>
*
* <code>
* new GroupedDropdownField(
* $name = "dropdown",
* $title = "Simple Grouped Dropdown",
* $source = array(
* "numbers" => array(
* "1" => "1",
* "2" => "2",
* "3" => "3",
* "4" => "4"
* ),
* "letters" => array(
* "1" => "A",
* "2" => "B",
* "3" => "C",
* "4" => "D",
* "5" => "E",
* "6" => "F"
* )
* )
* )
* </code>
*
* @package forms
* @subpackage fields-basic
*/
class GroupedDropdownField extends DropdownField {
function Field() {
// Initialisations
$options = '';
$classAttr = '';
if($extraClass = trim($this->extraClass())) {
$classAttr = "class=\"$extraClass\"";
}
foreach($this->getSource() as $value => $title) {
if(is_array($title)) {
$options .= "<optgroup label=\"$value\">";
foreach($title as $value2 => $title2) {
$selected = $value2 == $this->value ? " selected=\"selected\"" : "";
$options .= "<option$selected value=\"$value2\">$title2</option>";
}
$options .= "</optgroup>";
} else { // Fall back to the standard dropdown field
$selected = $value == $this->value ? " selected=\"selected\"" : "";
$options .= "<option$selected value=\"$value\">$title</option>";
}
}
$id = $this->id();
return "<select $classAttr name=\"$this->name\" id=\"$id\">$options</select>";
}
}
?>