Overlap Bar

A ReactJS component for a stacked fillable gauge where each bar is overlapped to the others.

Installation

Install with npm install overlap-bar and import in your project.

Usage

This component accepts the following properties:

• data (mandatory): the data used to draw the gauges. It can either be an array of numbers or an array of objects (see the examples below);
• max: the full scale used to draw the gauges. Defaults to the highest value passed in the data property, but can be manually set;
• showLabels: a boolean value that controls the visibility of the labels within the gauges. Defaults to false;
• formatLabel: a function that returns the rendered label. Use this to change how your label appears within the gauge. Defaults to (value) => value

Examples

To draw a simple gauge just pass an array of numbers:

import React from 'react'
import OverlapBar from 'overlap-bar'

class MyComponent extends React.Component {
    render() {
        let data = [10, 40, 100]

        return (
            <OverlapBar data={data} />
        )
    }
}

export default MyComponent

To draw a gauge with custom colors you can pass data like in this example:

import React from 'react'
import OverlapBar from 'overlap-bar'

class MyComponent extends React.Component {
    render() {
        let data = [{
            value: 30,
            backgroundColor: '#ff0000'
        }, {
            value: 80,
            backgroundColor: '#00ff00'
        }]

        return (
            <OverlapBar data={data} max={100} />
        )
    }
}

export default MyComponent

You can also show some labels:

import React from 'react'
import OverlapBar from 'overlap-bar'

class MyComponent extends React.Component {
    formatLabel(value) {
        return `${value} %`
    }

    render() {
        let data = [{
            value: 30,
            backgroundColor: '#ff0000',
            color: '#fff'
        }, {
            value: 80,
            backgroundColor: '#00ff00',
            color: '#fff'
        }]

        return (
            <OverlapBar
                data={data}
                max={100}
                showLabels={true}
                formatLabel={this.formatLabel}
            />
        )
    }
}

export default MyComponent

The component includes some default CSS, but you can change the way it looks by overriding the .overlap-bar, .bar and .bar-label classes.

Demo

Coming as soon as I figure out how to work with React and GH Pages :)

Contributing

Clone the repository, run npm install, hack away and add your tests. Run npm test to check that everything is good, and then build with npm run build-dist. If you want a non minified bundled version with source maps, run npm run build-dev, it will be placed in the dev directory.

Pull requests and issues are welcome!

License

MIT