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<?php

/**
 * MvcCore
 *
 * This source file is subject to the BSD 3 License
 * For the full copyright and license information, please view
 * the LICENSE.md file that are distributed with this source code.
 *
 * @copyright   Copyright (c) 2016 Tom Flidr (https://github.com/mvccore)
 * @license     https://mvccore.github.io/docs/mvccore/5.0.0/LICENCE.md
 */

namespace MvcCore\Ext\Forms\Field\Props;

/**
 * Trait for all visible fields, for classes:
 * - `\MvcCore\Ext\Forms\Fields\Button`
 *    - `\MvcCore\Ext\Forms\Fields\SubmitButton`
 *    - `\MvcCore\Ext\Forms\Fields\ResetButton`
 * - `\MvcCore\Ext\Forms\Fields\Color`
 * - `\MvcCore\Ext\Forms\Fields\Date`
 *    - `\MvcCore\Ext\Forms\Fields\DateTime`
 *    - `\MvcCore\Ext\Forms\Fields\Month`
 *    - `\MvcCore\Ext\Forms\Fields\Time`
 *    - `\MvcCore\Ext\Forms\Fields\Week`
 * - `\MvcCore\Ext\Forms\Fields\File`
 * - `\MvcCore\Ext\Forms\Fields\Checkbox`
 * - `\MvcCore\Ext\Forms\Fields\Image`
 * - `\MvcCore\Ext\Forms\Fields\Number`
 *    - `\MvcCore\Ext\Forms\Fields\Range`
 * - `\MvcCore\Ext\Forms\Fields\ResetInput`
 * - `\MvcCore\Ext\Forms\Fields\Select`
 *    - `\MvcCore\Ext\Forms\Fields\CountrySelect`
 * - `\MvcCore\Ext\Forms\Fields\SubmitInput`
 * - `\MvcCore\Ext\Forms\Fields\Text`
 *    - `\MvcCore\Ext\Forms\Fields\Email`
 *    - `\MvcCore\Ext\Forms\Fields\Password`
 *    - `\MvcCore\Ext\Forms\Fields\Search`
 *    - `\MvcCore\Ext\Forms\Fields\Tel`
 *    - `\MvcCore\Ext\Forms\Fields\Url`
 * - `\MvcCore\Ext\Forms\Fields\Textarea`
 * - `\MvcCore\Ext\Forms\FieldsGroup`
 *    - `\MvcCore\Ext\Forms\CheckboxGroup`
 *    - `\MvcCore\Ext\Forms\RadioGroup`
 */
trait ReadOnly {

    /**
     * Form field attribute `readonly`, determination if field value will be 
     * possible to read only or if value will be possible to change by user. 
     * Default value is `FALSE`. This flag is also used for submit checking. 
     * If any field is marked as read only, browsers always send value in submit.
     * If field is configured as read only, no value sent under field name 
     * from user will be accepted in submit process and value for this field 
     * will be used by server side form initialization. 
     * Readonly attribute has more power than required. If readonly is true and
     * required is true and if there is invalid submitted value, there is no required 
     * error and it's used value from server side assigned by 
     * `$form->SetValues();` or from session.
     * @var bool|NULL
     */
    protected $readOnly = NULL;

    /**
     * Get form field attribute `readonly`, determination if field value will be 
     * possible to read only or if value will be possible to change by user. 
     * Default value is `FALSE`. This flag is also used for submit checking. 
     * If any field is marked as read only, browsers always send value in submit.
     * If field is configured as read only, no value sent under field name 
     * from user will be accepted in submit process and value for this field 
     * will be used by server side form initialization. 
     * Readonly attribute has more power than required. If readonly is true and
     * required is true and if there is invalid submitted value, there is no required 
     * error and it's used value from server side assigned by 
     * `$form->SetValues();` or from session.
     * @return bool|NULL
     */
    public function GetReadOnly () {
        return $this->readOnly;
    }

    /**
     * Set form field attribute `readonly`, determination if field value will be 
     * possible to read only or if value will be possible to change by user. 
     * Default value is `FALSE`. This flag is also used for submit checking. 
     * If any field is marked as read only, browsers always send value in submit.
     * If field is configured as read only, no value sent under field name 
     * from user will be accepted in submit process and value for this field 
     * will be used by server side form initialization. 
     * Readonly attribute has more power than required. If readonly is true and
     * required is true and if there is invalid submitted value, there is no required 
     * error and it's used value from server side assigned by 
     * `$form->SetValues();` or from session.
     * @param bool|NULL $readonly
     * @return \MvcCore\Ext\Form
     */
    public function SetReadOnly ($readOnly = TRUE) {
        /** @var $this \MvcCore\Ext\Forms\Field */
        $this->readOnly = $readOnly;
        return $this;
    }
}