React Blockly Drawer

A React component to play with Blockly.

Table of Contents

• Introduction
• Setup
• Examples
• Component Properties
• Development
• Contributing
• Comments

Introduction

A React component to play with Blockly.

Setup

$ npm install react-blockly-drawer node-blockly --save

Examples

Basic Example

import React from 'react';
import ReactDOM from 'react-dom';
import Blockly from 'node-blockly/browser'; 

import BlocklyDrawer, { Block, Category } from 'react-blockly-drawer';
  
  const helloWorld =  {
    name: 'HelloWorld',
    category: 'Demo',
    block: {
      init: function () {
        this.jsonInit({
          message0: 'Hello %1',
          args0: [
            {
              type: 'field_input',
              name: 'NAME',
              check: 'String',
            },
          ],
          output: 'String',
          colour: 160,
          tooltip: 'Says Hello',
        });
      },
    },
    generator: (block) => {
      const message = `'${block.getFieldValue('NAME')}'` || '\'\'';
      const code = `console.log('Hello ${message}')`;
      return [code, Blockly.JavaScript.ORDER_MEMBER];
    },
  };

  ReactDOM.render(
    <BlocklyDrawer
      tools={[helloWorld]}
      onChange={(code, workspace) => {
        console.log(code, workspace);
      }}
      language={Blockly.JavaScript}
      appearance={
        {
          categories: {
            Demo: {
              colour: '270'
            },
          },
        }
      }
    >
      <Category name="Variables" custom="VARIABLE" />
      <Category name="Values">
        <Block type="math_number" />
        <Block type="text" />
      </Category>
    </BlocklyDrawer>,
    document.getElementById('root')
);

Component Properties

onChange: function (code, workspaceXML) {}

Event listener to the workspace change. Two arguments are passed to this callback:

• code is the generated code of your created program (see the property language);
• workspaceXML is an XML text that corresponds to the content of the workspace.

language: object [optional]

A language generator, either one of the languages described in the Blockly documentation on code generation or a custom object with method workspaceToCode. Default generator is Blockly.Javascript. If language is set to null, no code is generated and the first argument passed to the onChange function, code will be null.

children: node(s)

Blockly predefined blocks/tools can be passed as children of this component. For example, the following content could be passed.

<Category name="Variables" custom="VARIABLE" />
<Category name="Values">
  <Block type="math_number" />
  <Block type="text" />
</Category>

workspaceXML: string [optional]

Workspace XML initial content. It is no necessary to pass it if you want a new/empty workspace.

injectOptions: object [optional]

Options for the workspace. See blocklyDocumentation for details.

appearance: object [optional]

Options for styling. In order to style the block categories an object containing the categories property should be passed. This property categories is an object that has the categories names as keys and the values contain the styling properties for that block category. For example:

{
  categories: {
    Demo: {
      colour: '270'
    },
  },
}

This way the category Demo is colored.

See blocklyDocumentation for block categories styling. for details.

className: string

Component's class

style: object

Component's style

tools: array [optional]

An array of your custom block/tools. Each item should have the following properties:

• name: string

• It is the name of the block/tool.

• category: string

• The category where this block/tool is going to be inside of.

• block: object

• Block's definition as it is done in Blockly.

• generator: function

• Generator's definition as it is done in Blockly.

For example:

  {
     name: 'HelloWorld',
     category: 'Demo',
     block: {
       init: function () {
         this.jsonInit({
           message0: 'Hello %1',
           args0: [
             {
               type: 'field_input',
               name: 'NAME',
               check: 'String',
             },
           ],
           output: 'String',
           colour: 160,
           tooltip: 'Says Hello',
         });
       },
     },
     generator: (block) => {
       const message = `'${block.getFieldValue('NAME')}'` || '\'\'';
       const code = `console.log('Hello ${message}')`;
       return [code, Blockly.JavaScript.ORDER_MEMBER];
     },
   }

Development

• Running tests
• Building component

git clone [e-mail]:xvicmanx/react-blockly-drawer.git

Running tests

npm test

Building component

npm run build

Contributing

See CONTRIBUTING.md

Built with

• node-blockly: Blockly for Node.js and Browser as CommonJS module
• prop-types: Runtime type checking for React props and similar objects.
• react: React is a JavaScript library for building user interfaces.

Comments

Feel free to make any suggestion to improve this component.