React Absolute Grid

An absolute layout grid with animations, filtering, zooming, and drag and drop support. Use your own component as the grid item. See the Demo.

Usage:

Install with npm install react-absolute-grid

import React from 'react';
import createAbsoluteGrid from './lib/AbsoluteGrid.jsx';

// This is the component that will display your data
import YourDisplayComponent from 'your-display-component';

 var sampleItems = [
  {key: 1, name: 'Test', sort: 0, filtered: 0},
  {key: 2, name: 'Test 1', sort: 1, filtered: 0},
];

// Pass your display component to create a new grid
const AbsoluteGrid = createAbsoluteGrid(YourDisplayComponent, {someProp: 'my component needs this'});
React.render(<AbsoluteGrid items={sampleItems} />, document.getElementById('Container'));

CreateAbsoluteGrid

createAbsoluteGrid(DisplayComponent, displayProps = {}, forceImpure = false)

• DisplayComponent: is a react component to display in your grid
• displayProps: optional : are properties you want passed down to the DisplayComponent such as event handlers.
• forceImpure: optional : not recommended Will make this function as an impure component, meaning it always renders.

Options (Properties)

Property	Default	Description
items	[]	The array of items in the grid
keyProp	'key'	The property to be used as a key
filterProp	'filtered'	The property to be used for filtering, if the filtered value is true, the item won't be displayed. It's important to not remove items from the array because that will cause React to remove the DOM, for performance we would rather hide it then remove it.
sortProp	'sort'	The property to sort on
itemWidth	128	The width of an item
itemHeight	128	The height of an item
verticalMargin	-1	How much space between rows, -1 means the same as columns margin which is dynamically calculated based on width
responsive	false	If the container has a dynamic width, set this to true to update when the browser resizes
dragEnabled	false	Enables drag and drop listeners, onMove will be called with the keys involved in a drag and drop
animation	'transform 300ms ease'	The CSS animation to use on elements. Pass a blank string or false for no animation.
zoom	1	Zooms the contents of the grid, 1 = 100%
onMove	fn(from, to)	This function is called when an item is dragged over another item. It is your responsibility to update the sort of all items when this happens.
onDragStart	fn(e)	This function is called when an item starts dragging, this is NOT required.
onDragMove	fn(e)	This function is called when as an item is being moved, this is NOT required.
onDragEnd	fn(e)	This function is called when an item has finished its drag, this is NOT required.

Your Component

Your component will receive item, index and itemsLength as props, as well as anything you pass into the createAbsoluteGrid function. Here's the simplest possible example:

import React from 'react';

export default function SampleDisplay(props) {
    // Supposing your item shape is something like {name: 'foo'}
    const { item, index, itemsLength } = props;
    return <div>Item {index} of {itemsLength}: {item.name}</div>;
}

What Makes AbsoluteGrid Unique?

The idea behind AbsoluteGrid is high performance. This is achieved by using Translate3d to position each item in the layout. Items are never removed from the DOM, instead they are hidden. For best performance you should avoid re-arranging or removing items which you pass into AbsoluteGrid, instead you can use the filtered and sort properties to hide or sort an item. Those properties are customizable using the keyProp and filterProp properties. In addition, all data passed must be immutable so that we don't waste any renders.

Your Display Component props

Each Component is passed the following props, as well as anything passed into the second parameter of createAbsoluteGrid

Property	Description
item	The data associated with the GridItem
index	The index of the item data in the items array
itemsLength	The total length of the items array
...displayProps	props passed into createAbsoluteGrid

ToDo:

• Tests
• Improve Drag & Drop browser support and reliability

Browser Compatibility

This component should work in all browsers that support CSS3 3D Transforms. If you need IE9 support you can modify it to use transform rather than transform3d. Pull requests welcome!

Drag and Drop only works on IE11+ due to lack of pointer events, although there is a workaround coming soon.

Migrating from 2.x

Instead of passing displayObject to the AbsoluteGrid component, pass the component directly into the composer function, createAbsoluteGrid which returns an AbsoluteGrid component. That's it!