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<?php
/**
* Set of radio buttons designed to emulate a dropdown.
*
* This field allows you to ensure that a form element is submitted is not optional and is part of a fixed set of
* data. This field uses the input type of radio. It's a direct subclass of {@link DropdownField},
* so the constructor and arguments are in the same format.
*
* <b>Usage</b>
*
* <code>
* new OptionsetField(
* $name = "Foobar",
* $title = "FooBar's optionset",
* $source = array(
* "1" => "Option 1",
* "2" => "Option 2",
* "3" => "Option 3",
* "4" => "Option 4",
* "5" => "Option 5"
* ),
* $value = "1"
* );
* </code>
*
* You can use the helper functions on data object set to create the source array. eg:
*
* <code>
* //Database request for the object
* $map = FooBar::get()->map();
* // returns an SS_Map object containing an array of ID => Title
*
* // Instantiate the OptionsetField
* $FieldList = new FieldList(
* new OptionsetField(
* $name = "Foobar",
* $title = "FooBar's optionset",
* $source = $map,
* $value = $map[0]
* )
* );
*
* // Pass the fields to the form constructor. etc
* </code>
*
* @see CheckboxSetField for multiple selections through checkboxes instead.
* @see DropdownField for a simple <select> field with a single element.
* @see TreeDropdownField for a rich and customizeable UI that can visualize a tree of selectable elements
*
* @package forms
* @subpackage fields-basic
*/
class OptionsetField extends DropdownField {
/**
* @var Array
*/
protected $disabledItems = array();
public function Field($properties = array()) {
$source = $this->getSource();
$odd = 0;
$options = array();
if($source) {
foreach($source as $value => $title) {
$itemID = $this->ID() . '_' . preg_replace('/[^a-zA-Z0-9]/', '', $value);
$odd = ($odd + 1) % 2;
$extraClass = $odd ? 'odd' : 'even';
$extraClass .= ' val' . preg_replace('/[^a-zA-Z0-9\-\_]/', '_', $value);
$options[] = new ArrayData(array(
'ID' => $itemID,
'Class' => $extraClass,
'Name' => $this->name,
'Value' => $value,
'Title' => $title,
'isChecked' => $value == $this->value,
'isDisabled' => $this->disabled || in_array($value, $this->disabledItems),
));
}
}
$properties = array_merge($properties, array(
'Options' => new ArrayList($options)
));
return $this->customise($properties)->renderWith(
$this->getTemplates()
);
}
public function performReadonlyTransformation() {
// Source and values are DataObject sets.
$field = $this->castedCopy('LookupField');
$field->setSource($this->getSource());
$field->setReadonly(true);
return $field;
}
/**
* Mark certain elements as disabled,
* regardless of the {@link setDisabled()} settings.
*
* @param array $items Collection of array keys, as defined in the $source array
*/
public function setDisabledItems($items) {
$this->disabledItems = $items;
return $this;
}
/**
* @return Array
*/
public function getDisabledItems() {
return $this->disabledItems;
}
public function ExtraOptions() {
return new ArrayList();
}
}
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