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>
*
* <b>Disabling individual items</b>
*
* <code>
* $groupedDrDownField->setDisabledItems(
* array(
* "numbers" => array(
* "1" => "1",
* "3" => "3"
* ),
* "letters" => array(
* "3" => "C"
* )
* )
* )
* </code>
*
* @package forms
* @subpackage fields-basic
*/
class GroupedDropdownField extends DropdownField {
public function Field($properties = array()) {
$options = '';
foreach($this->getSource() as $value => $title) {
if(is_array($title)) {
$options .= "<optgroup label=\"$value\">";
foreach($title as $value2 => $title2) {
$disabled = '';
if( array_key_exists($value, $this->disabledItems)
&& is_array($this->disabledItems[$value])
&& in_array($value2, $this->disabledItems[$value]) ){
$disabled = 'disabled="disabled"';
}
$selected = $value2 == $this->value ? " selected=\"selected\"" : "";
$options .= "<option$selected value=\"$value2\" $disabled>$title2</option>";
}
$options .= "</optgroup>";
} else { // Fall back to the standard dropdown field
$disabled = '';
if( in_array($value, $this->disabledItems) ){
$disabled = 'disabled="disabled"';
}
$selected = $value == $this->value ? " selected=\"selected\"" : "";
$options .= "<option$selected value=\"$value\" $disabled>$title</option>";
}
}
return FormField::create_tag('select', $this->getAttributes(), $options);
}
public function Type() {
return 'groupeddropdown dropdown';
}
}