first commit

Block/Widget/ProductPrice.php

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+<?php
+
+namespace Webidea24\WidgetProductPrice\Block\Widget;
+
+use Magento\Catalog\Api\ProductRepositoryInterface;
+use Magento\Catalog\Model\Product;
+use Magento\Catalog\Pricing\Price\FinalPrice;
+use Magento\Framework\DataObject\IdentityInterface;
+use Magento\Framework\Exception\NoSuchEntityException;
+use Magento\Framework\Pricing\Render;
+use Magento\Framework\View\Element\Template;
+use Magento\Widget\Block\BlockInterface;
+
+class ProductPrice extends Template implements BlockInterface, IdentityInterface
+{
+
+    /**
+     * @var ProductRepositoryInterface
+     */
+    private $productRepository;
+
+    protected $_template = 'Webidea24_WidgetProductPrice::price-block.phtml';
+
+    public function __construct(
+        Template\Context $context,
+        ProductRepositoryInterface $productRepository,
+        array $data = []
+    )
+    {
+        parent::__construct($context, $data);
+        $this->productRepository = $productRepository;
+    }
+
+    protected function _toHtml()
+    {
+        return $this->getProduct() ? parent::_toHtml() : '';
+    }
+
+    public function getPriceBlock()
+    {
+        /** @var Render $priceRender */
+        $priceRender = $this->getLayout()->getBlock('product.price.render.default');
+        if ($priceRender) {
+            return $priceRender->render(
+                FinalPrice::PRICE_CODE,
+                $this->getProduct(),
+                [
+                    'include_container' => true,
+                    'display_minimal_price' => true,
+                    'zone' => Render::ZONE_ITEM_VIEW,
+                ]
+            );
+        }
+    }
+
+    public function getProduct(): ?Product
+    {
+        if (!$product = $this->getData('_product')) {
+            $idPath = $this->getData('id_path');
+            $exploded = explode('/', $idPath);
+            if (!isset($exploded[1])) {
+                return null;
+            }
+
+            try {
+                $product = $this->productRepository->getById((int)$exploded[1]);
+            } catch (NoSuchEntityException $e) {
+                return null;
+            }
+            $this->setData('_product', $product);
+        }
+
+        /** @noinspection PhpIncompatibleReturnTypeInspection */
+        return $product;
+    }
+
+    public function getIdentities()
+    {
+        return ['widget_product_price'] + $this->getProduct()->getIdentities();
+    }
+}

Model/Widget/Source/Attribute.php

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+<?php
+
+namespace Webidea24\WidgetProductPrice\Model\Widget\Source;
+
+use Magento\Catalog\Model\Product;
+use Magento\Eav\Model\Config;
+use Magento\Framework\Data\OptionSourceInterface;
+
+class Attribute implements OptionSourceInterface
+{
+
+    /**
+     * @var Config
+     */
+    private $eavConfig;
+
+    public function __construct(
+        Config $eavConfig
+    )
+    {
+        $this->eavConfig = $eavConfig;
+    }
+
+    public function toOptionArray()
+    {
+        $attributes = $this->eavConfig->getEntityAttributes(Product::ENTITY);
+        $options = [];
+        foreach ($attributes as $attribute) {
+            $options[$attribute->getAttributeCode()] = [
+                'value' => $attribute->getAttributeCode(),
+                'label' => $attribute->getDefaultFrontendLabel() . ' (' . $attribute->getAttributeCode() . ')'
+            ];
+        }
+        ksort($options);
+
+        return $options;
+    }
+}

composer.json

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+{
+    "name": "webidea24/magento2-module-widget-price-box",
+    "description": "Magento 2 Module: Widget: Adds a price box for a product",
+    "type": "magento2-module",
+    "license": [
+        "MIT"
+    ],
+    "autoload": {
+        "files": [
+            "registration.php"
+        ],
+        "psr-4": {
+            "Webidea24\\WidgetProductPrice\\": ""
+        }
+    }
+}

etc/module.xml

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+<?xml version="1.0"?>
+<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+        xsi:noNamespaceSchemaLocation="urn:magento:framework:Module/etc/module.xsd">
+    <module name="Webidea24_WidgetProductPrice"/>
+</config>

etc/widget.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<widgets xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:noNamespaceSchemaLocation="urn:magento:module:Magento_Widget:etc/widget.xsd">
+
+    <widget id="product_price-box" class="Webidea24\WidgetProductPrice\Block\Widget\ProductPrice" is_email_compatible="true">
+        <label translate="true">Product Price Box</label>
+        <description translate="true">Display the pricebox of a product with the actual price</description>
+        <parameters>
+            <parameter name="id_path" xsi:type="block" visible="true" required="true" sort_order="10">
+                <label translate="true">Product</label>
+                <block class="Magento\Catalog\Block\Adminhtml\Product\Widget\Chooser">
+                    <data>
+                        <item name="button" xsi:type="array">
+                            <item name="open" xsi:type="string" translate="true">Select Product...</item>
+                        </item>
+                    </data>
+                </block>
+            </parameter>
+        </parameters>
+    </widget>
+</widgets>
+

registration.php

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+<?php
+
+use Magento\Framework\Component\ComponentRegistrar;
+
+ComponentRegistrar::register(ComponentRegistrar::MODULE, 'Webidea24_WidgetProductPrice', __DIR__);

view/frontend/templates/price-block.phtml

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+<?php
+/** @var \Webidea24\WidgetProductPrice\Block\Widget\ProductPrice $block */
+?>
+
+<div class="product-price-block"><?= $block->getPriceBlock() ?></div>