smart-energy-monitor/software/flow/node_modules/gridstack/README.md

gridstack.js
============

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Mobile-friendly Javascript library for dashboard layout and creation. Making a drag-and-drop, multi-column dashboard has never been easier. Allows you to build draggable, responsive bootstrap v3-friendly layouts. It also has multiple bindings and works great with [React](https://reactjs.org/), [Angular](https://angular.io/), [Knockout.js](http://knockoutjs.com), [Ember](https://www.emberjs.com/) and others, and comes with a Typescript definition out of the box.

Inspired by no-longer maintained gridster.js, built with love.

Please visit http://gridstackjs.com and [these demos](http://gridstackjs.com/demo/).

Join us on Slack: https://gridstackjs.troolee.com

[![Slack Status](https://gridstackjs.troolee.com/badge.svg)](https://gridstackjs.troolee.com)

<!-- START doctoc generated TOC please keep comment here to allow auto update -->
<!-- DON'T EDIT THIS SECTION, INSTEAD RE-RUN doctoc TO UPDATE -->
**Table of Contents**  *generated with [DocToc](http://doctoc.herokuapp.com/)*

- [Demo and examples](#demo-and-examples)
- [Usage](#usage)
  - [Install](#install)
  - [Include](#include)
  - [Basic usage](#basic-usage)
  - [Requirements](#requirements)
  - [API Documentation](#api-documentation)
  - [Extend Library](#extend-library)
  - [Touch devices support](#touch-devices-support)
  - [gridstack.js for specific frameworks](#gridstackjs-for-specific-frameworks)
  - [Change grid columns](#change-grid-columns)
  - [Custom columns CSS](#custom-columns-css)
  - [Override resizable/draggable options](#override-resizabledraggable-options)
  - [Migrating to v0.3.0](#migrating-to-v030)
- [Changes](#changes)
- [The Team](#the-team)

<!-- END doctoc generated TOC please keep comment here to allow auto update -->


Demo and examples
====

Please visit http://gridstackjs.com and [these demos](http://gridstackjs.com/demo/).


Usage
=====

## Install

* Using yarn / npm:

[![NPM version](https://img.shields.io/npm/v/gridstack.svg)](https://www.npmjs.com/package/gridstack)

```bash
$ yarn install gridstack
```

## Include

* local:


```html
<link rel="stylesheet" href="gridstack.css" />
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.4.1/jquery.min.js"></script>
<script src="gridstack.all.js"></script>
```

* Using CDN (minimized):

```html
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/gridstack@0.6.4/dist/gridstack.min.css" />
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.4.1/jquery.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/gridstack@0.6.4/dist/gridstack.all.js"></script>
```

* Using CDN (debug):

```html
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/gridstack@0.6.4/dist/gridstack.css" />
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.4.1/jquery.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/gridstack@0.6.4/dist/gridstack.js"></script>
<script src="https://cdn.jsdelivr.net/npm/gridstack@0.6.4/dist/jquery-ui.js"></script>
<script src="https://cdn.jsdelivr.net/npm/gridstack@0.6.4/dist/gridstack.jQueryUI.js"></script>
```

## Basic usage

```html
<div class="grid-stack">
  <div class="grid-stack-item">
    <div class="grid-stack-item-content">Item 1</div>
  </div>
  <div class="grid-stack-item" data-gs-width="2">
    <div class="grid-stack-item-content">Item 2 wider</div>
  </div>
</div>

<script type="text/javascript">
$(function () {
  $('.grid-stack').gridstack();
});
</script>
```

see [jsfiddle sample](https://jsfiddle.net/adumesny/jqhkry7g) as running example too.

## Requirements

* [jQuery](http://jquery.com) (>= 1.8)
* `Array.prototype.find`, and `Number.isNaN()` for IE and older browsers.
  * Note: as of v0.5.4 We supply a separate `gridstack-poly.js` for that 
(part of `gridstack.all.js`) or you can look at other pollyfills 
([core.js](https://github.com/zloirock/core-js#ecmascript-6-array) and [mozilla.org](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/find)).

Using gridstack.js with jQuery UI

* [jQuery UI](http://jqueryui.com) (>= 1.12.0). Minimum required components: Draggable, Droppable, Resizable (Widget, Mouse, core).
  * Note: as of v0.5.4 we include this subset as `jquery-ui.js` (and min.js) which is part of `gridstack.all.js`. If you wish to bring your own lib, include the individual gridstack parts instead of all.js
* (Optional) [jquery-ui-touch-punch](https://github.com/furf/jquery-ui-touch-punch) for touch-based devices support

## API Documentation

Documentation can be found [here](https://github.com/gridstack/gridstack.js/tree/develop/doc).


## Extend Library

You can easily extend or patch gridstack with code like this:

```javascript
$(function () {
  // extend gridstack with our own custom method
  window.GridStackUI.prototype.printCount = function() {
    console.log('grid has ' + this.grid.nodes.length + ' items');
  };

  $('.grid-stack').gridstack();

  // you can now call on any grid this...
  $('.grid-stack').data('gridstack').printCount();
});
```

## Touch devices support

Please use [jQuery UI Touch Punch](https://github.com/furf/jquery-ui-touch-punch) to make jQuery UI Draggable/Resizable
working on touch-based devices.

```html
<script src="core-js/client/shim.min.js"></script>
<script src="jquery.min.js"></script>
<script src="jquery-ui.min.js"></script>
<script src="jquery.ui.touch-punch.min.js"></script>

<script src="gridstack.js"></script>
```

Also `alwaysShowResizeHandle` option may be useful:

```javascript
$(function () {
  var options = {
    alwaysShowResizeHandle: /Android|webOS|iPhone|iPad|iPod|BlackBerry|IEMobile|Opera Mini/i.test(navigator.userAgent)
  };
  $('.grid-stack').gridstack(options);
});
```

If you're still experiencing issues on touch devices please check [#444](https://github.com/gridstack/gridstack.js/issues/444)


## gridstack.js for specific frameworks

search for ['gridstack' under NPM](https://www.npmjs.com/search?q=gridstack&ranking=popularity) for latest, more to come...

- ember: [gridstack-ember](https://github.com/yahoo/ember-gridstack)
- AngularJS: [gridstack-angular](https://github.com/kdietrich/gridstack-angular)
- Angular8: [lb-gridstack](https://github.com/pfms84/lb-gridstack)
- Rails: [gridstack-js-rails](https://github.com/randoum/gridstack-js-rails)
- React: [react-gridstack](https://github.com/pitrho/react-gridstack)

## Change grid columns

GridStack makes it very easy if you need [1-12] columns out of the box (default is 12), but you always need **2 things** if you need to customize this:

1) Change the `column` grid option when creating a grid to your number N
```js
$('.grid-stack').gridstack( {column: N} );
```

2) include `gridstack-extra.css` if **N < 12** (else custom CSS - see next). Without these, things will not render/work correctly.
```html
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/gridstack@0.6.4/dist/gridstack-extra.css"/>

<div class="grid-stack grid-stack-N">...</div>
```

Note: we added `grid-stack-N` class and `gridstack-extra.css` which defines CSS for grids with custom [1-12] columns. Anything more and you'll need to generate the SASS/CSS yourself (see next).

See example: [2 grids demo](http://gridstack.github.io/gridstack.js/demo/two.html) with 6 columns

## Custom columns CSS

If you need > 12 columns or want to generate the CSS manually you will need to generate CSS rules for `.grid-stack-item[data-gs-width="X"]` and `.grid-stack-item[data-gs-x="X"]`.

For instance for 3-column grid you need to rewrite CSS to be:

```css
.grid-stack-item[data-gs-width="3"]  { width: 100% }
.grid-stack-item[data-gs-width="2"]  { width: 66.66666667% }
.grid-stack-item[data-gs-width="1"]  { width: 33.33333333% }

.grid-stack-item[data-gs-x="2"]  { left: 66.66666667% }
.grid-stack-item[data-gs-x="1"]  { left: 33.33333333% }
```

For 4-column grid it should be:

```css
.grid-stack-item[data-gs-width="4"]  { width: 100% }
.grid-stack-item[data-gs-width="3"]  { width: 75% }
.grid-stack-item[data-gs-width="2"]  { width: 50% }
.grid-stack-item[data-gs-width="1"]  { width: 25% }

.grid-stack-item[data-gs-x="3"]  { left: 75% }
.grid-stack-item[data-gs-x="2"]  { left: 50% }
.grid-stack-item[data-gs-x="1"]  { left: 25% }
```

and so on.

Better yet, here is a SASS code snippet which can make life much easier (Thanks to @ascendantofrain, [#81](https://github.com/gridstack/gridstack.js/issues/81) and @StefanM98, [#868](https://github.com/gridstack/gridstack.js/issues/868)) and you can use sites like [sassmeister.com](https://www.sassmeister.com/) to generate the CSS for you instead:

```sass
.grid-stack > .grid-stack-item {

  $gridstack-columns: 12;

  min-width: (100% / $gridstack-columns);

  @for $i from 1 through $gridstack-columns {
    &[data-gs-width='#{$i}'] { width: (100% / $gridstack-columns) * $i; }
    &[data-gs-x='#{$i}'] { left: (100% / $gridstack-columns) * $i; }
    &[data-gs-min-width='#{$i}'] { min-width: (100% / $gridstack-columns) * $i; }
    &[data-gs-max-width='#{$i}'] { max-width: (100% / $gridstack-columns) * $i; }
  }
}
```

you can also look at the SASS [src/gridstack-extra.scss](https://github.com/gridstack/gridstack.js/blob/develop/src/gridstack-extra.scss) and modify to add more columns
and also have the `.grid-stack-N` prefix to support letting the user change columns dynamically.

## Override resizable/draggable options

You can override default `resizable`/`draggable` options. For instance to enable other then bottom right resizing handle
you can init gridstack like:

```javascript
$('.grid-stack').gridstack({
  resizable: {
    handles: 'e, se, s, sw, w'
  }
});
```

Note: It's not recommended to enable `nw`, `n`, `ne` resizing handles. Their behaviour may be unexpected.

## Migrating to v0.3.0

As of v0.3.0, gridstack introduces a new plugin system. The drag'n'drop functionality has been modified to take advantage of this system. Because of this, and to avoid dependency on core code from jQuery UI, the plugin functionality was moved to a separate file.

To ensure gridstack continues to work, either include the additional `gridstack.jQueryUI.js` file into your HTML or use `gridstack.all.js`:

```html
<script src="gridstack.js"></script>
<script src="gridstack.jQueryUI.js"></script>
```
or
```html
<script src="gridstack.all.js"></script>
```

We're working on implementing support for other drag'n'drop libraries through the new plugin system.

Changes
=====

View our change log [here](https://github.com/gridstack/gridstack.js/tree/develop/doc/CHANGES.md).


The Team
========

gridstack.js is currently maintained by [Dylan Weiss](https://github.com/radiolips) and [Alain Dumesny](https://github.com/adumesny), originally created by [Pavel Reznikov](https://github.com/troolee). We appreciate [all contributors](https://github.com/gridstack/gridstack.js/graphs/contributors) for help.