@lyra/imagetool

The image tool used in lyra

Getting started

npm install --save @lyra/imagetool

Usage

ImageTool widget

import React from 'react'
import ImageTool from '@lyra/imagetool'

class MyComponent extends React.Component {
  state = {
    value: {
      hotspot: {
        x: 0.4,
        y: 0.3,
        height: 0.6,
        width: 0.4
      },
      crop: {
        left: 0.1,
        right: 0.2,
        top: 0.1,
        bottom: 0.21
      }
    }
  }

  handleImageToolchange = newValue => {
    this.setState({value: newValue})
  }

  render() {
    return (
      <ImageTool
        src="https://c4.staticflickr.com/8/7514/16189387096_420dbca030_h.jpg"
        value={this.state.value}
        onChange={handleImageToolchange}
      />
    )
  }
}

Usage

CSS style calculator

import calculateStyles from '@lyra/imagetool/calculateStyles'

const styles = calculateStyles({
  hotspot: {
    x: 0.4,
    y: 0.3,
    height: 0.6,
    width: 0.4
  },
  crop: {
    left: 0.1,
    right: 0.2,
    top: 0.1,
    bottom: 0.21
  },
  image: {height: 100, width: 125},
  container: {aspectRatio: 16 / 10},
  align: {
    x: 'left',
    y: 'center'
  }
})

returns an object with style objects that can be used with markup

{
  "container": {
    "overflow": "hidden",
    "position": "relative",
    "width": "100%",
    "height": "62.5%"
  },
  "crop": {
    "position": "absolute",
    "overflow": "hidden",
    "height": "100%",
    "width": "79.26%",
    "top": "7.97%",
    "left": "17.51%"
  },
  "image": {
    "position": "absolute",
    "height": "144.93%",
    "width": "142.86%",
    "top": "-14.49%",
    "left": "-14.29%"
  },
  "padding": {
    "marginTop": "62.5%"
  }
}

this can then be passed to jsx markup with the following structure:

<div style={styles.container}>
  <div style={styles.padding} />
  <div style={styles.crop}>
    <img
      src="https://c4.staticflickr.com/8/7514/16189387096_420dbca030_h.jpg"
      style={styles.image}
    />
  </div>
</div>