Viewing File: /home/maglabs/it/app/code/Magento/Widget/Block/Adminhtml/Widget/Instance/Edit/Tab/Settings.php

<?php
/**
 * Copyright © Magento, Inc. All rights reserved.
 * See COPYING.txt for license details.
 */

/**
 * Widget Instance Settings tab block
 */
namespace Magento\Widget\Block\Adminhtml\Widget\Instance\Edit\Tab;

/**
 * @api
 * @since 100.0.2
 */
class Settings extends \Magento\Backend\Block\Widget\Form\Generic implements
    \Magento\Backend\Block\Widget\Tab\TabInterface
{
    /**
     * @var \Magento\Framework\Registry
     */
    protected $_coreRegistry;

    /**
     * @var \Magento\Framework\View\Design\Theme\LabelFactory
     */
    protected $_themeLabelFactory;

    /**
     * @param \Magento\Backend\Block\Template\Context $context
     * @param \Magento\Framework\Registry $registry
     * @param \Magento\Framework\Data\FormFactory $formFactory
     * @param \Magento\Framework\View\Design\Theme\LabelFactory $themeLabelFactory
     * @param array $data
     */
    public function __construct(
        \Magento\Backend\Block\Template\Context $context,
        \Magento\Framework\Registry $registry,
        \Magento\Framework\Data\FormFactory $formFactory,
        \Magento\Framework\View\Design\Theme\LabelFactory $themeLabelFactory,
        array $data = []
    ) {
        $this->_themeLabelFactory = $themeLabelFactory;
        parent::__construct($context, $registry, $formFactory, $data);
    }

    /**
     * Initialise the block
     *
     * @return void
     */
    protected function _construct()
    {
        parent::_construct();
        $this->setActive(true);
    }

    /**
     * Prepare label for tab
     *
     * @return \Magento\Framework\Phrase
     */
    public function getTabLabel()
    {
        return __('Settings');
    }

    /**
     * Prepare title for tab
     *
     * @return \Magento\Framework\Phrase
     */
    public function getTabTitle()
    {
        return __('Settings');
    }

    /**
     * Returns status flag about this tab can be shown or not
     *
     * @return true
     */
    public function canShowTab()
    {
        return !(bool)$this->getWidgetInstance()->isCompleteToCreate();
    }

    /**
     * Returns status flag about this tab hidden or not
     *
     * @return true
     */
    public function isHidden()
    {
        return false;
    }

    /**
     * Getter
     *
     * @return \Magento\Widget\Model\Widget\Instance
     */
    public function getWidgetInstance()
    {
        return $this->_coreRegistry->registry('current_widget_instance');
    }

    /**
     * Prepare form before rendering HTML
     *
     * @return $this
     */
    protected function _prepareForm()
    {
        /** @var \Magento\Framework\Data\Form $form */
        $form = $this->_formFactory->create(
            ['data' => ['id' => 'edit_form', 'action' => $this->getData('action'), 'method' => 'post']]
        );

        $fieldset = $form->addFieldset('base_fieldset', ['legend' => __('Settings')]);

        $this->_addElementTypes($fieldset);

        $fieldset->addField(
            'code',
            'select',
            [
                'name' => 'code',
                'label' => __('Type'),
                'title' => __('Type'),
                'required' => true,
                'values' => $this->getTypesOptionsArray()
            ]
        );

        /** @var $label \Magento\Framework\View\Design\Theme\Label */
        $label = $this->_themeLabelFactory->create();
        $options = $label->getLabelsCollection(__('-- Please Select --'));
        $fieldset->addField(
            'theme_id',
            'select',
            [
                'name' => 'theme_id',
                'label' => __('Design Theme'),
                'title' => __('Design Theme'),
                'required' => true,
                'values' => $options
            ]
        );
        $continueButton = $this->getLayout()->createBlock(
            \Magento\Backend\Block\Widget\Button::class
        )->setData(
            [
                'label' => __('Continue'),
                'onclick' => "setSettings('" . $this->getContinueUrl() . "', 'code', 'theme_id')",
                'class' => 'save',
            ]
        );
        $fieldset->addField('continue_button', 'note', ['text' => $continueButton->toHtml()]);

        $this->setForm($form);

        return parent::_prepareForm();
    }

    /**
     * Return url for continue button
     *
     * @return string
     */
    public function getContinueUrl()
    {
        return $this->getUrl(
            'adminhtml/*/*',
            [
                '_current' => true,
                'code' => '<%- data.code %>',
                'theme_id' => '<%- data.theme_id %>',
                '_escape_params' => false
            ]
        );
    }

    /**
     * Retrieve array (widget_type => widget_name) of available widgets
     *
     * @return array
     */
    public function getTypesOptionsArray()
    {
        $widgets = $this->getWidgetInstance()->getWidgetsOptionArray();
        array_unshift($widgets, ['value' => '', 'label' => __('-- Please Select --')]);
        return $widgets;
    }

    /**
     * User-defined widgets sorting by Name
     *
     * @param array $a
     * @param array $b
     * @return boolean
     */
    protected function _sortWidgets($a, $b)
    {
        return strcmp($a["label"], $b["label"]);
    }
}