silverstripe-framework/forms/ListboxField.php

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<?php
use SilverStripe\ORM\ArrayList;
/**
* Multi-line listbox field, created from a <select> tag.
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*
* <b>Usage</b>
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*
* <code>
* new ListboxField(
* $name = "pickanumber",
* $title = "Pick a number",
* $source = array(
* "1" => "one",
* "2" => "two",
* "3" => "three"
* ),
* $value = 1
* )
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* </code>
*
* @see DropdownField for a simple <select> field with a single element.
* @see CheckboxSetField for multiple selections through checkboxes.
* @see OptionsetField for single selections via radiobuttons.
* @see TreeDropdownField for a rich and customizeable UI that can visualize a tree of selectable elements
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*
* @package forms
* @subpackage fields-basic
*/
class ListboxField extends MultiSelectField {
/**
* The size of the field in rows.
* @var int
*/
protected $size;
/**
* @var Array
*/
protected $disabledItems = array();
/**
* Creates a new dropdown field.
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*
* @param string $name The field name
* @param string $title The field title
* @param array $source An map of the dropdown items
* @param string|array|null $value You can pass an array of values or a single value like a drop down to be selected
* @param int $size Optional size of the select element
*/
public function __construct($name, $title = '', $source = array(), $value = null, $size = null) {
if($size) {
$this->setSize($size);
}
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parent::__construct($name, $title, $source, $value);
}
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/**
* Returns a <select> tag containing all the appropriate <option> tags
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*
* @param array $properties
* @return string
*/
public function Field($properties = array()) {
$properties = array_merge($properties, array(
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'Options' => $this->getOptions(),
));
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return FormField::Field($properties);
}
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/**
* Gets the list of options to render in this formfield
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*
* @return ArrayList
*/
public function getOptions() {
// Loop through and figure out which values were selected.
$options = array();
$selectedValue = $this->getValueArray();
foreach($this->getSource() as $itemValue => $title) {
$itemSelected = in_array($itemValue, $selectedValue)
|| in_array($itemValue, $this->getDefaultItems());
$itemDisabled = $this->isDisabled()
|| in_array($itemValue, $this->getDisabledItems());
$options[] = new ArrayData(array(
'Title' => $title,
'Value' => $itemValue,
'Selected' => $itemSelected,
'Disabled' => $itemDisabled,
));
}
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$options = new ArrayList($options);
$this->extend('updateGetOptions', $options);
return $options;
}
public function getAttributes() {
return array_merge(
parent::getAttributes(),
array(
'multiple' => 'true',
'size' => $this->getSize(),
'name' => $this->getName() . '[]'
)
);
}
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/**
* Get the size of this dropdown in rows.
*
* @return integer
*/
public function getSize() {
return $this->size;
}
/**
* Sets the size of this dropdown in rows.
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*
* @param int $size The height in rows (e.g. 3)
* @return $this Self reference
*/
public function setSize($size) {
$this->size = $size;
return $this;
}
/**
* Mark certain elements as disabled,
* regardless of the {@link setDisabled()} settings.
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*
* @param array $items Collection of array keys, as defined in the $source array
* @return $this Self reference
*/
public function setDisabledItems($items) {
$this->disabledItems = $items;
return $this;
}
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/**
* @return array
*/
public function getDisabledItems() {
return $this->disabledItems;
}
}