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https://github.com/react-designer/react-designer

It's not art
https://github.com/react-designer/react-designer

action-strategies bezier-curves react svg vector

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It's not art

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README 

        
*This project is **back to being maintained**, redirect any new PRs and issues to [@wassgha](https://github.com/wassgha/)*



React-designer

==============



[![Join the chat at https://gitter.im/fatiherikli/react-designer](https://badges.gitter.im/fatiherikli/react-designer.svg)](https://gitter.im/fatiherikli/react-designer?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)



Easy to configure, lightweight, editable vector graphics in your react components.



- Supports polygon and shape designing (with bezier curves)

- Implemented default scale, rotate, drag, and arrange actions

- Custom object types and custom panels



Examples and demonstration:



![bezier editor](http://i.imgur.com/cqTleWB.gif)



## Keymap



| Parameter                  | Default                         |

| :-------------             |:-------------------------------

| `del` or `back`            | Removes the current object      |

| `arrows`                   | Move the current object by 1px  |

| `shift` + `arrows`         | Move the currnet object by 10px |

| `enter`                    | Close the drawing path          |



## Usage

All the entities are pure react components except action strategies in react-designer. I have tried to explain that. I'm starting with components.



### Component: Designer



This is the main canvas component which holds the all toolset and manages all drawing data. You could use this component to create drawing canvas.



An example with default configuration:



```javascript

import Designer, {Text, Rectangle} from 'react-designer';



class App() {

  state = {

    objects: [

      {type: "text", x: 10, y: 20, text: "Hello!", fill: "red"},

      {type: "rect", x: 50, y: 70, fill: "red"}

    ]

  }



  render() {

    return (

       this.setState({objects})}

        objects={this.state.objects} />

    )

  }

}

```



The `Designer` component expects the following parameters:



| Parameter        | Default                        |        |

| :-------------    |:------------------------------- | :-----  |

| width            | 300                            | The width of document  |

| height           | 300                            | The height of document  |

| canvasWidth      | null                           | The width of canvas. Same with document if it's null.  |

| canvasHeight     | null                           | The height of canvas. Same with document if it's null. |

| objects          | []                             | Your object set.  |

| onUpdate         | []                             | Your update callback.  |

| objectTypes      |  Text, Circle, Rectangle, Path | Mapping of object types. |

| insertMenu       |                    | Insert menu component. You can set null for hiding

| snapToGrid       |  1                             | Snaps the objects accordingly this multipier. |

| rotator          | rotate({object, mouse})        | The rotating strategy of objects

| scale            | scale({object, mouse})         | The scaling strategy of objects

| drag             | drag({object, mouse})          | The dragging strategy of objects



Object types are pure react components which are derived from `Vector`.



### Component: Vector



You can create an object type by subclassing `Vector` component. Each object types have static `meta` object which contains `icon` and `initial`, and optionally `editor` value.



Example implementation:



```javascript

class MyRectangle extends Vector {

  static meta = {

    icon: ,

    initial: {

      width: 5,

      height: 5,

      strokeWidth: 0,

      fill: "yellow",

      radius: 5,

      blendMode: "normal"

    }

  };



  render() {

    let {object, index} = this.props;

    return (

      

    );

  }

}

```



You can register this object type in your `Designer` instance.



```javascript



```



Apart from meta options, the vectors have `panels` static definition which contains the available panels of their.



Here are default panels in Vector component:



```javascript

static panels = [

    SizePanel,

    TextPanel,

    StylePanel,

    ArrangePanel

];

```



### Component: Preview



You can use `Preview` component to disable editing tool set and controllers. This component just renders the SVG output of your data. It may be useful for presenting edited or created graphic, instead of building a SVG file.



The parameters are same with Designer component, except for two: the onUpdate callback is not necessary and an additional `responsive` option can be added, which given the original `width` and `height` will expand the preview to cover the width and height of its parent component, scaling its SVG while keeping the original aspect ratio of elements. Note that the original `width` and `height` still need to be provided in order for the responsive `Preview` to work.



```javascript



```



### Action strategies



The actions of `rotate`, `scale`, `drag` are pure functions. You can change this actions by passing your strategy. The action functions calling with the following object bundle.



```javascript

{

  object, // the current object

  mouse, // mouse coordinates bundle. it have x and y attribtues

  startPoint, // starting points of mouse and object bundles.

  objectIndex, // the index of the object in the documen,

  objectRefs, // DOM references of objects in the document

}

```



Here are default action strategies:



#### Dragger

Moves the object to mouse bundle by the center of object.



```javascript

// dragger.js

export default ({object, startPoint, mouse}) => {

  return {

    ...object,

    x: mouse.x - (startPoint.clientX - startPoint.objectX),

    y: mouse.y - (startPoint.clientY - startPoint.objectY)

  };

};

```



#### Scaler

Scales the object by the difference with startPoint and current mouse bundle. If the difference lower than zero, changes the position of object.



```javascript

// scale.js

export default ({object, startPoint, mouse}) => {

  let {objectX, objectY, clientX, clientY} = startPoint;

  let width = startPoint.width + mouse.x - clientX;

  let height = startPoint.height + mouse.y - clientY;



  return {

    ...object,

    x: width > 0 ? objectX: objectX + width,

    y: height > 0 ? objectY: objectY + height,

    width: Math.abs(width),

    height: Math.abs(height)

  };

};

```



#### Rotator

Changes the rotation as degree of object. This action may needs some improvement, I'm calculating with a base value (45 degree) because of the rotator anchor is on the upper right corner of object.



```javascript

// rotate.js

export default ({object, startPoint, mouse}) => {

  let angle = Math.atan2(

    startPoint.objectX + (object.width || 0) / 2 - mouse.x,

    startPoint.objectY + (object.height || 0) / 2 - mouse.y

  );



  let asDegree = angle * 180 / Math.PI;

  let rotation = (asDegree + 45) * -1;



  return {

    ...object,

    rotate: rotation

  };

};

```



### To-do



I built this project to create user-designed areas in my side project. So, this was just a hobby project, there may be things missing for a svg editor. I'm open to pull requests and feedback, and I need help to maintain.



Here is a todo list that in my mind. You could extend this list.



- Implement `Export` panel

    - Export selected object

    - Export document

- Write initial tests and setup test environment

- Add a key map to keep the ratio of objects when scaling

- Implement theme support for UI



## Release Notes



### 1.0.8



  - Move React-dom dependency to dev-dependencies



### 1.0.6



  - `Designer` component exported as default now.

  - Added `insertMenu` prop to `Designer` component.



### Contributors (You can add your name here in your pull-request)



- Fatih Erikli  - [fatiherikli](https://github.com/fatiherikli/)

- Wassim Gharbi  - [wassgha](https://github.com/wassgha/)

- [iamraffe](https://github.com/iamraffe/)

- [thatneat](https://github.com/thatneat/)