2009-10-23 03:29:55 +02:00
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<?php
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/**
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* NullableField is a field that wraps other fields when you want to allow the user to specify whether the value of the field is null or not.
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*
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* The classic case is to wrap a TextField so that the user can distinguish between an empty string and a null string.
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* $a = new NullableField(new TextField("Field1", "Field 1", "abc"));
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*
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* It displays the field that is wrapped followed by a checkbox that is used to specify if the value is null or not.
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* It uses the Title of the wrapped field for its title.
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* When a form is submitted the field tests the value of the "is null" checkbox and sets its value accordingly.
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* You can retrieve the value of the wrapped field from the NullableField as follows:
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* $field->Value() or $field->dataValue()
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*
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* You can specify the label to use for the "is null" checkbox. If you want to use I8N for this label then specify it like this:
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* $field->setIsNullLabel(_T(SOME_MODULE_ISNULL_LABEL, "Is Null");
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*
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* @author Pete Bacon Darwin
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2010-04-23 02:11:41 +02:00
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* @package forms
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* @subpackage fields-basic
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2009-10-23 03:29:55 +02:00
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*/
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class NullableField extends FormField {
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/**
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* The field that holds the value of this field
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* @var FormField
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*/
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protected $valueField;
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/**
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* The label to show next to the is null check box.
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* @var string
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*/
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protected $isNullLabel;
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/**
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* Create a new nullable field
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* @param $valueField
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* @return NullableField
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*/
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function __construct(FormField $valueField, $isNullLabel = null) {
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$this->valueField = $valueField;
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$this->isNullLabel = $isNullLabel;
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if ( is_null($this->isNullLabel) ) {
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// Set a default label if one is not provided.
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$this->isNullLabel = _t('NullableField.IsNullLabel', 'Is Null', PR_HIGH);
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}
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2011-10-29 06:01:52 +02:00
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parent::__construct($valueField->getName(), $valueField->Title(), $valueField->Value(), $valueField->getForm(), $valueField->RightTitle());
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2009-10-23 03:29:55 +02:00
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$this->readonly = $valueField->isReadonly();
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}
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/**
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* Get the label used for the Is Null checkbox.
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* @return string
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*/
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function getIsNullLabel() {
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return $this->isNullLabel;
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}
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/**
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* Set the label used for the Is Null checkbox.
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* @param $isNulLabel string
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*/
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function setIsNullLabel(string $isNulLabel){
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$this->isNullLabel = $isNulLabel;
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2012-02-17 13:35:26 +01:00
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return $this;
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2009-10-23 03:29:55 +02:00
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}
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/**
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* Get the id used for the Is Null check box.
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* @return string
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*/
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function getIsNullId() {
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2011-10-29 06:01:52 +02:00
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return $this->getName() . "_IsNull";
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2009-10-23 03:29:55 +02:00
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}
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/**
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* (non-PHPdoc)
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2012-03-24 04:38:57 +01:00
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* @see framework/forms/FormField#Field()
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2009-10-23 03:29:55 +02:00
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*/
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2012-04-11 07:33:36 +02:00
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function Field($properties = array()) {
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2009-10-23 03:29:55 +02:00
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if ( $this->isReadonly()) {
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$nullableCheckbox = new CheckboxField_Readonly($this->getIsNullId());
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} else {
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$nullableCheckbox = new CheckboxField($this->getIsNullId());
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}
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$nullableCheckbox->setValue(is_null($this->dataValue()));
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2011-03-23 05:12:25 +01:00
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2009-10-23 03:29:55 +02:00
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return $this->valueField->Field() . ' ' . $nullableCheckbox->Field() . ' <span>' . $this->getIsNullLabel().'</span>';
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}
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/**
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* Value is sometimes an array, and sometimes a single value, so we need to handle both cases
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*/
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function setValue($value, $data = null) {
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if ( is_array($data) && array_key_exists($this->getIsNullId(), $data) && $data[$this->getIsNullId()] ) {
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$value = null;
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}
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$this->valueField->setValue($value);
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parent::setValue($value);
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2012-02-17 13:35:26 +01:00
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return $this;
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2009-10-23 03:29:55 +02:00
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}
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/**
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* (non-PHPdoc)
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* @see forms/FormField#setName($name)
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*/
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function setName($name) {
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// We need to pass through the name change to the underlying value field.
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$this->valueField->setName($name);
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parent::setName($name);
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2012-02-17 13:35:26 +01:00
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return $this;
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2009-10-23 03:29:55 +02:00
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}
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/**
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* (non-PHPdoc)
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2012-03-24 04:38:57 +01:00
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* @see framework/forms/FormField#debug()
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2009-10-23 03:29:55 +02:00
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*/
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function debug() {
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$result = "$this->class ($this->name: $this->title : <font style='color:red;'>$this->message</font>) = ";
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$result .= (is_null($this->value)) ? "<<null>>" : $this->value;
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return result;
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}
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}
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