🔭 react-zoomable-container

A react component which allows you to make anything zoomable, pannable and pinchable.

Key Features

🔥 Fast, reliable solution to provide panning capabilities across all platforms.

🛠 Lightweight requiring no external dependencies.

🪁 Easy to use and customizable. Integrate your frontend with our context api.

👑 Ability to override default values, provide custom buttons to control zoomin/out/reset.

[DEMO] ollymonger.github.io

Installation

npm install react-zoomable-container or.... yarn add react-zoomable-container

Usage

Please checkout the <Controls> component for more advance usages.

import { ZoomableContainer } from 'react-zoomable-container';

const App = () => {
  return (  
   <ZoomableContainer>
    <div style={{width: '100%', height: '100%', backgroundColor: 'red'}}>
     <h1>Zoomable Container</h1>
    </div>
   </ZoomableContainer>
 )
}

// or providing custom controls and overrides and controls to lock/unlock pan and zoom! (all optional)
 
import { ZoomableContainer } from 'react-zoomable-container';

const Controls = () => {
  const { handleReset, zoomIn, zoomOut, info, controls: { pan: { locked: panLocked, setLocked: setPanLock }, zoom: { locked: zoomLocked, setLocked: setZoomLock } } } = useZoomableContext();

  return (
    <div style={{
      position:'absolute',
      top:0,
      left:0,
      zIndex:1000,
      display:'flex',
      flexDirection: "row",
      alignItems:'center',
      justifyContent:'center',
      padding:'1em',
    }}>
      <div style={{ display: 'flex', flexDirection: 'column', alignItems: 'center', justifyContent: 'center' }}>
        <button onClick={handleReset}>Reset</button>
        <button onClick={zoomIn}>Zoom In</button>
        <button onClick={zoomOut}>Zoom Out</button>
        <button onClick={() => setPanLock(!panLocked)}>
          {panLocked ? 'Unlock Pan' : 'Lock Pan'}
        </button>
        <button onClick={() => setZoomLock(!zoomLocked)}>
          {zoomLocked ? 'Unlock Zoom' : 'Lock Zoom'}
        </button>
      </div>
      <div style={{ display: 'flex', flexDirection: 'column', alignItems: 'center', justifyContent: 'center' }}>
        <h5>Scale</h5>
        <p>{info.scale.toFixed(2)}</p>
        <h5>Position</h5>
        <p>{`x: ${info.position.x.toFixed(2)}, y: ${info.position.y.toFixed(2)}`}</p>
      </div>
    </div>
  )
}

const App = () => {
  const overrides = {
   scale: 0.8,
   position: {
     x: -0,
     y: 0
   },
    lerpTime: 300,
    scaleStep: 0.2,
    minScale: 0.2,
    maxScale: 2,
   }
  return (
    <ZoomableContainer customControls={<Controls />} controlOverrides={overrides}>
      <div style={{width: '100%', height: '100%', backgroundColor: 'red'}}>
        <h1>Zoomable Container</h1>
      </div>
    </ZoomableContainer>
  )
}

How does it work?

The parent holding the ZoomableContainer determines the Zoomable area and will stick within the parent.

You can also create your own Controls component to add.

Roadmap:

Integrate a pinch mechanic

Available properties

Property name	Type	Default
customControls?	Optional ReactNode	./src/components/Controls.tsx
controlOverrides?	{   scale?: number;   position?: {     x: number     y: number   };   lerpTime?: number;   scaleStep?: number;   minScale?: number;   maxScale?: number }	{   scale: 1,   position: {     x: 0, y: 0   },    lerpTime: 300,    scaleStep: 0.2,    minScale: 0,    maxScale: 1 }

Development

Want to contribute? Great!

Building

1. Run the 'yarn' or 'npm install' command at the project root.

   yarn
   
   npm install
   

2. After dependancies have installed, run the command below which builds the package to: ./dist/. This uses Rollup to build the package.

   yarn build
   
   npm run build
   

Local testing

1. Inside the project root, run either one of the commands below to link the project locally.

   yarn link
   
   npm link
   
   

2. Then inside of your other project (where you want to use this locally), run one of the commands below.

   yarn link react-zoomable-container
   
   npm link react-zoomable-container
   

3. This will now pickup every build change on the other project.

4. Make Pull request with your changes!

License

MIT