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<!doctype html>
<!--
backgrid
http://github.com/wyuenho/backgrid
Copyright (c) 2013 Jimmy Yuen Ho Wong and contributors
Licensed under the MIT @license.
-->
<html lang="en">
<head>
<meta charset="utf-8" />
<meta http-equiv="X-UA-Compatible" content="IE=edge;chrome=1" />
<meta name="viewport" content="width=device-width, initial-scale=1, user-scalable=no" />
<meta name="keywords" content="backgrid,backgrid.js,backbone,backbone.js,datagrid,grid,paginator,javascript" />
<meta name="description" content="A powerful widget set for building data grids with Backbone.js" />
<title>Backgrid.js - A powerful widget set for building data grids with Backbone.js</title>
<link rel="canonical" href="http://backgridjs.com" />
<link rel="stylesheet" href="//cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/2.2.2/css/bootstrap.min.css" />
<link rel="stylesheet" href="//cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/2.2.2/css/bootstrap-responsive.min.css" />
<link rel="stylesheet" href="//cdnjs.cloudflare.com/ajax/libs/select2/3.3.1/select2.css" />
<link rel="stylesheet" href="//cdnjs.cloudflare.com/ajax/libs/codemirror/2.36.0/codemirror.css" />
<link rel="stylesheet" href="//cdnjs.cloudflare.com/ajax/libs/codemirror/2.36.0/ambiance.css" />
<link rel="stylesheet" href="lib/backgrid.min.css" />
<link rel="stylesheet" href="lib/extensions/paginator/backgrid-paginator.min.css" />
<link rel="stylesheet" href="lib/extensions/text-cell/backgrid-text-cell.min.css" />
<link rel="stylesheet" href="lib/extensions/moment-cell/backgrid-moment-cell.min.css" />
<link rel="stylesheet" href="lib/extensions/select2-cell/backgrid-select2-cell.min.css" />
<link rel="stylesheet" href="lib/extensions/select-all/backgrid-select-all.min.css" />
<link rel="stylesheet" href="lib/extensions/filter/backgrid-filter.min.css" />
<link rel="stylesheet" href="assets/css/doc.css" />
<!--[if lt IE 9]>
<script src="//cdnjs.cloudflare.com/ajax/libs/modernizr/2.6.2/modernizr.min.js"></script>
<![endif]-->
</head>
<body>
<div id="main">
<header>
<div class="navbar navbar-fixed-top">
<div class="navbar-inner">
<div class="container">
<a href="."
class="brand" title="A powerful widget set for building data grids with Backbone.js">Backgrid.js</a>
<a class="btn btn-navbar" data-toggle="collapse" data-target=".nav-collapse">
<span class="icon-bar"></span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
</a>
<div class="nav-collapse collapse">
<ul class="nav nav-pills">
<li class="dropdown">
<a class="dropdown-toggle" data-toggle="dropdown" data-target="#" href="#">
Introduction
<b class="caret"></b>
</a>
<ul class="dropdown-menu">
<li><a href="#features">Features</a></li>
<li><a href="#getting-started">Getting Started</a></li>
<li><a href="#examples">Examples</a></li>
</ul>
</li>
<li class="dropdown">
<a class="dropdown-toggle" data-toggle="dropdown" data-target="#" href="#">
API Reference
<b class="caret"></b>
</a>
<ul class="dropdown-menu">
<li><a href="#api-grid">Grid</a></li>
<li><a href="#api-column">Column</a></li>
<li><a href="#api-cell">Cell</a></li>
<li><a href="#api-formatter">Formatter</a></li>
<li><a href="#api-header">Header</a></li>
<li><a href="#api-row">Row</a></li>
<li><a href="#api-body">Body</a></li>
<li><a href="#api-footer">Footer</a></li>
<li class="divider"></li>
<li><a href="#extensions"><strong class="muted">Extensions</strong></a></li>
<li class="divider"></li>
<li><a href="#api-select-all">SelectAll</a></li>
<li><a href="#api-paginator">Paginator</a></li>
<li><a href="#api-filter">Filter</a></li>
<li><a href="#api-text-cell">TextCell</a></li>
<li><a href="#api-moment-cell">MomentCell</a></li>
<li><a href="#api-select2-cell">Select2Cell</a></li>
</ul>
</li>
<li class="dropdown">
<a class="dropdown-toggle" data-toggle="dropdown" data-target="#" href="#">
More Info
<b class="caret"></b>
</a>
<ul class="dropdown-menu">
<li><a href="#styling">Styling</a></li>
<li class="divider"></li>
<li><a href="#faq">FAQ</a></li>
<li><a href="https://github.com/wyuenho/backgrid/blob/master/CHANGELOG.md" target="_blank">Change Log</a></li>
<li><a href="#license">License</a></li>
</ul>
</li>
<li id="social-media">
<a href="https://twitter.com/share" class="twitter-share-button" data-url="http://backgridjs.com" data-via="wong_jim">Tweet</a>
<div class="g-plusone" data-size="medium"></div>
<iframe src="http://ghbtns.com/github-btn.html?user=wyuenho&repo=backgrid&type=watch&count=true"
allowtransparency="true" frameborder="0" scrolling="0" width="110" height="20"></iframe>
<a href="https://coderwall.com/wyuenho"><img alt="Endorse wyuenho on Coderwall" src="http://api.coderwall.com/wyuenho/endorsecount.png" /></a>
<iframe allowtransparency="true" frameborder="0" scrolling="no"
style="border: 0; margin: 0 0 0 15px; padding: 0;"
src="https://www.gittip.com/wyuenho/widget.html" width="48pt" height="22pt"></iframe>
</li>
</ul>
</div>
</div>
<a class="visible-desktop" href="https://github.com/wyuenho/backgrid">
<img style="position: absolute; top: 0; right: 0; border: 0;" src="assets/img/forkme_right_gray_6d6d6d.png" alt="Fork me on GitHub">
</a>
</div>
</div>
</header>
<div class="container">
<section class="hero-unit">
<h1>Backgrid.js</h1>
<p class="lead">
Backgrid.js is a set of components for
building <strong>semantic</strong> and <strong>easily
stylable</strong> <strong>data grid</strong> widgets.</p>
<p class="lead">It offers a simple, intuitive
programming interface that makes easy things easy, but <em>hard things possible</em>
when dealing with tabular data.</p>
<p>
<a class="btn btn-large btn-success" href="#examples">See Examples</a>
<a class="btn btn-large btn-primary hidden-phone hidden-tablet"
href="https://github.com/wyuenho/backgrid/tags"
target="_blank">Download v0.2.0</a>
</p>
</section>
<div id="features">
<div class="page-header">
<h1>Features</h1>
<p>The goal of Backgrid.js is to produce a set of core Backbone UI
elements that offer you all the basic displaying, sorting and
editing functionalities you'd expect, and to create an
elegant API that makes extending Backgrid.js with extra
functionalities easy.</p>
</div>
<div class="row-fluid">
<div class="span6">
<h2>Advantages</h2>
<ul>
<li>No Hungarian notations.</li>
<li>Solid foundation. Based
on <a href="http://backbonejs.org">Backbone.js</a>.</li>
<li>Semantic and <a href="#styling">easily stylable</a>. Just
style with plain CSS like you would a normal HTML table.</li>
<li>Low learning curve. Works with plain old Backbone models and
collections. Easy things are easy, hards things possible.</li>
<li>Highly modular and customizable. Componenets are just simple
Backbone View classes, customization is easy if you already
know Backbone.</li>
<li>Lightweight. Extra features are separated
into <a href="#extensions">extensions</a>, which keeps the
bloat away.</li>
<li>Good documentation.</li>
<li>Well tested. Comes with <a href="test/" title="Jasmine Tests">100s of test cases</a>.</li>
</ul>
</div>
<div class="span6">
<h2>Supported browsers: <b style="font-size: 14px; font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif; font-weight: normal;">[1]</b></h2>
<ul>
<li>Internet Explorer 8+</li>
<li>Chrome 4+</li>
<li>Safari 4+</li>
<li>Firefox 4+</li>
<li>Opera 9+</li>
</ul>
<aside class="note">
<h3>Notes:</h3>
<div>1. Both the desktop and mobile versions of the above browsers are supported.</div>
</aside>
</div>
</div>
</div>
<section id="getting-started">
<div class="page-header">
<h1>Getting Started</h1>
</div>
<div class="row-fluid">
<div class="span6">
<p>
Backgrid.js depends on 3 libraries to function:
</p>
<ul>
<li><a href="http://jquery.com">jquery >= 1.7.0</a></li>
<li><a href="http://underscorejs.org">underscore.js ~ 1.4.0</a></li>
<li><a href="http://backbonejs.org">backbone.js >= 0.9.10</a></li>
</ul>
<aside class="note">
<h5>Note:</h5> If you don't care about having the latest
versions of the dependencies, you can use the bundled libraries
in the download package.
</aside>
</div>
<div class="span6">
<p>
Something like the following will get
the <strong>Backgrid.js</strong> core loaded:
</p>
<textarea class="code-snippet" data-mode="htmlmixed">
<link rel="stylesheet" href="lib/backgrid.css" />
<script src="assets/js/jquery.js"></script>
<script src="assets/js/underscore.js"></script>
<script src="assets/js/backbone.js"></script>
<script src="lib/backgrid.js"></script></textarea>
<p>Adjust the paths as needed.</p>
</div>
</div>
</section>
<section id="examples">
<div class="page-header">
<h1>Examples</h1>
</div>
<div class="row-fluid">
<div class="span12">
<div class="row-fluid">
<div class="span6">
<h2>Collection and Model</h2>
<p>Before you can display any tabular data in a grid, you must
first obtain the data.</p>
<p>At the most basic level, Backgrid pretends that every row
is a model object and the whole table is backed by a simple
Backbone collection.</p>
<p>Suppose we have a list of territory info objects:</p>
</div>
<div class="span6">
<textarea class="code-snippet" data-mode="javascript" data-eval="yes">
var Territory = Backbone.Model.extend({});
var Territories = Backbone.Collection.extend({
model: Territory,
url: "examples/territories.json"
});
var territories = new Territories();</textarea>
</div>
</div>
<div class="row-fluid">
<div class="span12">
<h2 id="example-1">Grid</h2>
<p>
The main entry point of the Backgrid package is the
Backgrid.Grid class. You can create a default Backgrid by
first defining some columns, and then put that list of
columns and the collection of data into the Grid constructor
like this:
</p>
<textarea class="code-snippet" data-mode="javascript" data-eval="yes">
var columns = [{
name: "id", // The key of the model attribute
label: "ID", // The name to display in the header
editable: false, // By default every cell in a column is editable, but *ID* shouldn't be
// Defines a cell type, and ID is displayed as an integer without the ',' separating 1000s.
cell: Backgrid.IntegerCell.extend({
orderSeparator: ''
})
}, {
name: "name",
label: "Name",
// The cell type can be a reference of a Backgrid.Cell subclass, any Backgrid.Cell subclass instances like *id* above, or a string
cell: "string" // This is converted to "StringCell" and a corresponding class in the Backgrid package namespace is looked up
}, {
name: "pop",
label: "Population",
cell: "integer" // An integer cell is a number cell that displays humanized integers
}, {
name: "percentage",
label: "% of World Population",
cell: "number" // A cell type for floating point value, defaults to have a precision 2 decimal numbers
}, {
name: "date",
label: "Date",
cell: "date",
}, {
name: "url",
label: "URL",
cell: "uri" // Renders the value in an HTML <a> element
}];
// Initialize a new Grid instance
var grid = new Backgrid.Grid({
columns: columns,
collection: territories
});
// Render the grid and attach the root to your HTML document
$("#example-1-result").append(grid.render().$el);
// Fetch some countries from the url
territories.fetch();</textarea>
</div>
</div>
<div class="row-fluid">
<div class="span12">
<h3>Result</h3>
<div id="example-1-result" class="backgrid-container"></div>
<aside class="note">See <a href="http://en.wikipedia.org/wiki/List_of_countries_by_population">Wikipedia</a></aside>
<br />
<p>The list of column definitions Backgrid.Grid expects is
simply a list of JSON objects, which you can hardcode into
your HTML templates or retrieve from a server when the DOM
is ready. Backgrid.js doesn't care where the column
definitions come from, as long as you supply the list to the
Grid constructor.</p>
<p>As expected, you now have a basic editable data grid
displayed. All the columns headers are labeled and sortable by
default. ID cells are not editable, and all other cell types
have reasonable validation built in. If the table gets too
large, you get a scroll bar.</p>
<p>Backgrid.js comes with <a href="#api-cell" title="Cells">10
basic cell types</a> in the core
and <a href="#api-text-cell" title="TextCell">many others
as extensions</a>. Cell types such as
<a href="#api-select2-cell"
title="Select2Cell">Select2Cell</a>
and <a href="#api-moment-cell"
title="MomentCell">MomentCell</a> give you a much richer
editing interface for option lists and datetime values on
desktop browsers. In addition, there's a wide range
of possibilities with how the data is converted for
display and persistence by using <a href="#api-formatter"
title="Formatter">formatters</a> or
customizing <a href="#api-cell">cell classes</a>.</p>
</div>
</div>
<div class="row-fluid">
<div class="span12">
<h2 id="example-2">Paginator</h2>
<p>If you have a large result set like the above, you'd
probably want to paginate your results. This is easily
achieved in Backgrid.js.</p>
<p>Backgrid.js comes with a paginator extension which you can
load by including the following into your <code>head</code>
tag:</p>
<textarea class="code-snippet" data-mode="htmlmixed">
<link rel="stylesheet" href="lib/extensions/paginator/backgrid-paginator.css" />
<script src="assets/js/backbone-pageable.js"></script>
<script src="lib/extensions/paginator/backgrid-paginator.js"></script></textarea>
<p>To use the paginator, you must first declare your
collections to be
a <a href="https://github.com/wyuenho/backbone-pageable/"
title="Backbone.PageableCollection">Backbone.PageableCollection</a>,
which is a simple subclass of the Backbone.js Collection with added
pagination behavior.</p>
<textarea class="code-snippet" data-mode="javascript" data-eval="yes">
var PageableTerritories = Backbone.PageableCollection.extend({
model: Territory,
url: "examples/pageable-territories.json",
state: {
pageSize: 15
},
mode: "client" // page entirely on the client side
});
var pageableTerritories = new PageableTerritories();
var pageableGrid = new Backgrid.Grid({
columns: columns,
collection: pageableTerritories,
footer: Backgrid.Extension.Paginator
});
$("#example-2-result").append(pageableGrid.render().$el);
pageableTerritories.fetch();</textarea>
</div>
</div>
<div class="row-fluid">
<div class="span12">
<h3>Result</h3>
<div id="example-2-result" class="backgrid-container"></div>
</div>
</div>
</div>
</div>
</section>
<section>
<div class="page-header">
<h1>API Reference</h1>
</div>
<div class="row-fluid">
<div class="span2">
<h2 id="api-grid">Grid</h2>
<ul class="nav">
<li><a href="api/index.html#!/api/Backgrid.Grid">Backgrid.Grid</a></li>
</ul>
</div>
<div class="span10">
<h3>How to Use the Grid</h3>
<p>As described in the <a href="#examples">examples</a> above, a
basic grid needs only a collection and a list of column
definitions.</p>
<h3>Manipulating Columns and Rows</h3>
<p>It is very easy to insert or remove a row in a grid, you just
have to pass a model reference
to <a href="api/index.html#!/api/Backgrid.Grid-method-insertRow">Grid#insertRow</a>
or <a href="api/index.html#!/api/Backgrid.Grid-method-removeRow">Grid#removeRow</a>.</p>
<textarea class="code-snippet" data-mode="javascript">
// Inserting rows
grid.insertRow([{
// model 1
}, {
// model 2 ... etc
}]);
// Remove rows
var musketeers = grid.collection.where({ job: "Musketeer" });
grid.removeRow(musketeers);</textarea>
<p>Inserting and remove columns is similarly easy. You just need
to pass some definitions
to <a href="api/index.html#!/api/Backgrid.Grid-method-insertColumn">Grid#insertColumn</a>
or
<a href="api/index.html#!/api/Backgrid.Grid-method-removeColumn">Grid#removeColumn</a>.</p>
<textarea class="code-snippet" data-mode="javascript">
// Insert a few new columns. Make sure your model has these attributes though.
grid.insertColumn([{
name: "selected",
label: "",
cell: "boolean",
sortable: false,
headerCell: MySelectAllCell
}, {
name: "address",
label: "Address",
cell: "string"
}]);
// Remove a column
var genderCol = grid.columns.where({ name: "gender" });
grid.removeColumn(genderCol);</textarea>
<h3>Customization</h3>
<p>The various ways of customizing a grid are described in the
following sections.</p>
</div>
</div>
<div class="row-fluid">
<div class="span2">
<h2 id="api-column">Columns</h2>
<ul class="nav">
<li><a href="api/index.html#!/api/Backgrid.Column" title="Backgrid.Column">Backgrid.Column</a></li>
<li><a href="api/index.html#!/api/Backgrid.Columns" title="Backgrid.Columns">Backgrid.Columns</a></li>
</ul>
</div>
<div class="span10">
<h3>Column Defaults</h3>
<p>Column defaults and required parameters are defined in
the <a href="api/index.html#!/api/Backgrid.Column-method-initialize">Backgrid.Column#initialize</a>
method.</p>
<h3>Column Definition</h3>
<p>A Column is a placeholder for a column definition.</p>
<p>You usually don't need to create an instance of this class
yourself, as a collection of column instances will be created for
you from a list of column object literals you provide to the
Backgrid.js view class constructors.</p>
<p>Internally, columns are stored as a collection in the form of
Backgrid.Columns. In addition, all parent views will convert the
column definition into
a <a href="api/index.html#!/api/Backgrid.Columns">Backgrid.Columns</a>
collection and pass a reference to any subviews that require
it.</p>
<h3>Listening to Column Attribute Changes</h3>
<p>Occasionally, you may want to listen to column attribute change
events. In that case, you can choose to initialize a
Backgrid.Columns collection and listen to events from the
individual models.</p>
<textarea class="code-snippet" data-mode="javascript" data-eval="no">
var myColumns = new Backgrid.Columns({
name: "id", label: "ID", cell: "string"
}, {
// ...
});
myColumns.on("change:renderable", function (col, colAttr) {
if (!colAttr) {
// hide the column
}
});</textarea>
</div>
</div>
<div class="row-fluid">
<div class="span2">
<h2 id="api-cell">Cell</h2>
<ul class="nav">
<li><a href="api/index.html#!/api/Backgrid.Cell">Backgrid.Cell</a></li>
<li><a href="api/index.html#!/api/Backgrid.DatetimeCell">Backgrid.DatetimeCell</a></li>
<li><a href="api/index.html#!/api/Backgrid.DateCell">Backgrid.DateCell</a></li>
<li><a href="api/index.html#!/api/Backgrid.TimeCell">Backgrid.TimeCell</a></li>
<li><a href="api/index.html#!/api/Backgrid.NumberCell">Backgrid.NumberCell</a></li>
<li><a href="api/index.html#!/api/Backgrid.IntegerCell">Backgrid.IntegerCell</a></li>
<li><a href="api/index.html#!/api/Backgrid.StringCell">Backgrid.StringCell</a></li>
<li><a href="api/index.html#!/api/Backgrid.UriCell">Backgrid.UriCell</a></li>
<li><a href="api/index.html#!/api/Backgrid.EmailCell">Backgrid.EmailCell</a></li>
<li><a href="api/index.html#!/api/Backgrid.BooleanCell">Backgrid.BooleanCell</a></li>
<li><a href="api/index.html#!/api/Backgrid.SelectCell">Backgrid.SelectCell</a></li>
<li><a href="api/index.html#!/api/Backgrid.CellEditor">Backgrid.CellEditor</a></li>
<li><a href="api/index.html#!/api/Backgrid.InputCellEditor">Backgrid.InputCellEditor</a></li>
<li><a href="api/index.html#!/api/Backgrid.SelectCellEditor">Backgrid.SelectCellEditor</a></li>
</ul>
</div>
<div class="span10">
<h3>Demo</h3>
<p class="label label-success">Try them</p>
<div id="cell-demo-grid-1" class="backgrid-container" style="height: auto"></div>
<div id="cell-demo-grid-2" class="backgrid-container" style="height: auto"></div>
<aside class="note">
<h5>Note:</h5>
<p>Backgrid.js and its author are not associated with Santa and
santaclaus.com in any way.</p>
</aside>
<h3>Configuring Cells</h3>
<p>While many built-in cells provide reasonable defaults, you may
choose to configure them to suit your own needs.</p>
<p>Cell types that you are most likely to configure are the
NumberCell, DatetimeCell and SelectCell classes. Once
configured, you may use them as the cell attribute values in
column definitions.</p>
<textarea class="code-snippet" data-mode="javascript" data-eval="no">
var grid = new Backgrid.Grid({
columns: [{
name: "id",
label: "ID",
editable: false,
// Dynamically defines a new cell type with new defaults.
// ID is displayed as an integer without ','s.
cell: Backgrid.IntegerCell.extend({
orderSeparator: ''
})
}, {
name: "lastaccessed",
label: "Last Login Time",
editable: false,
cell: Backgrid.DatetimeCell.extend({
includeMilli: true
})
}, {
name: "gender",
label: "Gender",
cell: Backgrid.SelectCell.extend({
// It's possible to render an option group or use a
// function to provide option values too.
optionValues: [["Male", "m"], ["Female", "f"]]
})
}],
collection: col
});
</textarea>
<p class="label label-info">Pro Tip</p>
<p>SelectCell treats all option values as strings by default, if
you need to persist a different type of values into your model,
you should extend SelectCell to provide your
own <a href="#api-formatter"
title="Formatter">formatter</a>.</p>
<p>See the <a href="api/index.html" title="API Doc">JSDoc</a> for
the various Cell classes for details on what you can configure
using this method.</p>
<h3>Custom Cell</h3>
<p>If the built-in and extension cell classes are not enough for
you, you may choose to create your own cell class and supply it
to a column definition.</p>
<p>If your custom cell will still use a
<code><input type="text" /></code> like the predefined
ones for editing, you may choose to
subclass <a href="api/index.html#!/api/Backgrid.Cell">Cell</a>
or one of the predefined classes and simply define a className
and a <a href="#api-formatter"
title="Formatter">formatter</a>. In fact, most of the core cell
classes are done this way.</p>
<textarea class="code-snippet" data-mode="javascript" data-eval="no">
// This is how StringCell is defined.
Backgrid.StringCell = Cell.extend({
// Cell default class names are the lower-cased and dasherized
// form of the the cell class names by convention.
className: "string-cell"
formatter: Backgrid.StringFormatter
});</textarea>
<p>If your cell class will render differently in display mode, you
may simply
override <a href="api/index.html#!/api/Backgrid.Cell-method-render">Cell#render()</a>
in your subclass.</p>
<h3>Custom CellEditor</h3>
<p class="label label-warning">Advanced Usage</p>
<p>Some cell types, like the
<a href="#api-text-cell" title="TextCell">TextCell</a>
extension, may only make sense if the editor is rendered in a
modal dialog or a form element in a different part of the
page. In that case the
default <a href="api/index.html#!/api/Backgrid.InputCellEditor"
title="InputCellEditor">InputCellEditor</a>, which renders a
<code><input type="text" /></code>, will not be suitable
and a new <a href="api/index.html#!/api/Backgrid.CellEditor"
title="CellEditor">CellEditor</a> must be defined.</p>
<p>A custom cell editor should subclass <a
href="api/index.html#!/api/Backgrid.CellEditor">CellEditor</a>
as it defines a number of required parameters in its initializer
and clean up operations that are necessary for most cell
editors. When a cell class enters edit mode, a new editor
instance is constructed by given it the required parameters, and
then a Backbone event <code>backgrid:edit</code> is fired from
the cell instance itself. A custom cell class can act on this
event to do anything before the cell editor is rendered.</p>
<p>Once the cell has entered edit mode, a Backbone event
<code>backgrid:editing</code> is fired. A custom cell class can
then act on it to do anything after the cell editor has been
rendered, e.g. placing the focus inside the editor.</p>
<p>During editing, if an error is encountered (see the <a
href="#api-formatter">formatter protocol</a> below), a cell
editor should fire a Backbone event <code>backgrid:error</code>
so that listeners—usually a cell instance—can
respond appropriately. When editing is done, a cell editor
should fire a Backbone <code>backgrid:done</code> event. A cell
should be listening to this event so it can remove its editor
and re-render itsef in display mode.</p>
<p class="label label-important">Truely Advanced Hacking</p>
<p>At the most basic level, Cells and CellEditors are simply
<a href="http://backbonejs.org/#View"
title="Backbone.View">Backbone.View</a> classes that are
guaranteed to be given a number of parameters when constructed
by <a href="api/index.html#!/api/Backgrid.Row"
title="Row">Row</a>. You can use any Backbone.View as your Cell
and CellEditor.</p>
</div>
</div>
<div class="row-fluid">
<div class="span2">
<h2 id="api-formatter">Formatter</h2>
<ul class="nav">
<li><a href="api/index.html#!/api/Backgrid.CellFormatter">Backgrid.CellFormatter</a></li>
<li><a href="api/index.html#!/api/Backgrid.DatetimeFormatter">Backgrid.DatetimeFormatter</a></li>
<li><a href="api/index.html#!/api/Backgrid.NumberFormatter">Backgrid.NumberFormatter</a></li>
</ul>
</div>
<div class="span10">
<h3>Custom Formatters</h3>
<p>In Backgrid.js, cell formatters serves the purpose of converting values
between JSON value types and strings, and validation. Writing
formatters for value conversion and validation is easy as you only
have to conform to a very simple protocol.</p>
<p>Any formatters must have the following two methods defined:</p>
<textarea class="code-snippet" data-mode="javascript" data-eval="no">
var formatter = {
// function (*): string
fromRaw: function (rawData) { },
// function (string): *|undefined
toRaw: function (formattedData) { }
};</textarea>
<p><code>fromRaw()</code> is called by Backgrid.Cell and its
subclasses whenever a raw model value needs to be formatted into
a humanized form for display.</p>
<p><code>toRaw()</code> is called by Backgrid.CellEditor and its
subclasses whenever a user input string needs to be converted back
to a raw JSON value for model persistence.</p>
<h3>Validation</h3>
<p>In addition to user input conversion, toRaw() also validates
the user input during conversion. If the user input is invalid
or cannot be converted to a JSON value,
toRaw() <strong>MUST</strong> return <code>undefined</code>
instead of throwing an Error.</p>
<p>In addition to using formatters to do simple yes or no
validations, if your model class has
a <a href="http://backbonejs.org/#Model-validate"
title="Backbone.Model#validate">validate()</a> method defined,
it will also be used for validation after trying with the
formatter.</p>
<h3>Using Custom Formatters</h3>
<p>A custom formatter can be used instead of the cell's default by
extending the cell:</p>
<textarea class="code-snippet" data-mode="javascript" data-eval="no">
var grid = new Backgrid.Grid({
columns: [{
name: "url",
cell: "uri",
formatter: _.extend({}, Backgrid.CellFormatter.prototype, {
fromRaw: function (rawValue) {
return rawValue.replace("http://", '');
}
})
}],
collection: col
});</textarea>
</div>
</div>
<div class="row-fluid">
<div class="span2">
<h2 id="api-header">Header</h2>
<ul class="nav">
<li><a href="api/index.html#!/api/Backgrid.Header">Backgrid.Header</a></li>
<li><a href="api/index.html#!/api/Backgrid.HeaderRow">Backgrid.HeaderRow</a></li>
<li><a href="api/index.html#!/api/Backgrid.HeaderCell">Backgrid.HeaderCell</a></li>
</ul>
</div>
<div class="span10">
<h3>Understanding the Default Header</h3>
<p>Backgrid.js comes with a default header section, a header row
and a header cell implementation that renders a sorter if the
column is sortable. The text inside the header cells comes from
the column definitions. If a <em>label</em> is not defined in a
column definition, its name is used as the label instead.</p>
<p>The default header cell implementation supports sorting in
ascending or descending order, using the column's natural
ordering. The sorter will also allow cycling back to the
table's default sorting order, which is sorting by the
model <a href="http://backbonejs.org/#Model-id"
title="Backbone.Model#id">server IDs</a>
and <a href="http://backbonejs.org/#Model-cid"
title="Backbone.Model#cid">client IDs</a>.</p>
<h3>Customizing the Header</h3>
<p class="label label-warning">Advanced Usage</p>
<p>You are allow to use a different header cell class on
columns. There is no restriction on what a header cell must do. In fact,
any <a href="http://backbonejs.org/#View"
title="Backbone.View">Backbone.View</a> class can be
used. However, if you wish to modify how the sorter behaves, you
must implement the sorting protocol. See
the <a href="api/index.html#!/api/Backgrid.HeaderCell"
title="Backgrid.HeaderCell API">JSDoc</a> for details.</p>
<textarea class="code-snippet" data-mode="javascript" data-eval="no">
var SelectAllHeaderCell = Backgrid.HeaderCell.extend({
// Implement your "select all" logic here
});
var grid = new Backgrid.Grid({
columns: [{
name: "selected",
label: "",
sortable: false,
cell: "boolean",
headerCell: SelectAllHeaderCell
}],
collection: col
});</textarea>
</div>
</div>
<div class="row-fluid">
<div class="span2">
<h2 id="api-row">Row</h2>
<ul class="nav">
<li><a href="api/index.html#!/api/Backgrid.Row">Backgrid.Row</a></li>
</ul>
</div>
<div class="span10">
<h3>Customizing Row</h3>
<p class="label label-warning">Advanced Usage</p>
<p>A row is simply an intermediary view class that constructs the
appropriate Cell class instances for rendering the model
columns.</p>
<p>If you would like to override how a row is rendered, you may
define your own Row subclass and give it to the Grid constructor
as an option:</p>
<textarea class="code-snippet" data-mode="javascript" data-eval="no">
var ZebraStrippingRow = Backgrid.Row.extend({
// ...
});
var grid = new Backgrid.Grid({
row: ZebraStrippingRow, // <-- Tell the new Body class to use ZebraStrippingRow to render rows.
columns: [{
//...
}],
collection: col
});</textarea>
</div>
</div>
<div class="row-fluid">
<div class="span2">
<h2 id="api-body">Body</h2>
<ul class="nav">
<li><a href="api/index.html#!/api/Backgrid.Body">Backgrid.Body</a></li>
</ul>
</div>
<div class="span10">
<h3>Customizing Body</h3>
<p class="label label-important">Truely Advanced Hacking</p>
<p>Body is the intermediary view that coordinates between the
various parts of the grid. Specifically, the default
implementation is responsible for re-rendering the rows when any
model is inserted into, removed from, or reordered in the
underlying collection. See
the <a href="api/index.html#!/api/Backgrid.Body">JSDoc</a> for
details.</p>
<textarea class="code-snippet" data-mode="javascript" data-eval="no">
var MyBody = Backgrid.Body.extend({
// I really don't know why you would do this, but you can if you want
});
var grid = new Backgrid.Grid({
body: MyBody,
columns: [{
// ...
}],
collection: col
});</textarea>
</div>
</div>
<div class="row-fluid">
<div class="span2">
<h2 id="api-footer">Footer</h2>
<ul class="nav">
<li><a href="api/index.html#!/api/Backgrid.Footer">Backgrid.Footer</a></li>
</ul>
</div>
<div class="span10">
<h3>Putting Things at The End of a Table</h3>
<p>The default Footer class is an abstract class that only defines
a number of required constructor parameters. If you wish to
append additional information to the end of a table you must
subclass Footer and supply the class to the Grid
constructor.</p>
<textarea class="code-snippet" data-mode="javascript" data-eval="no">
var CaptionFooter = Backgrid.Footer.extend({
render: function () {
this.$el.html("<tr><td colspan='6'>Hello World!</td></tr>");
return this;
}
});
var grid = new Backgrid.Grid({
columns: [{
//...
}],
collection: col,
footer: CaptionFooter // <--
});</textarea>
<p>Very often, you'll want to append a paginator to the end
of your table if there are too many rows. For this, there's already
a <a href="#api-paginator">paginator extension</a> provided for you.</p>
</div>
</div>
</section>
<section id="extensions">
<div class="page-header">
<h1>Extensions</h1>
<p>It is not necessary to create an extension project if you simply
want to customize or extend some Backgrid.js classes for your own
private use; however, if you have one or more Backgrid.js
components that add new features to the core, you may consider
packaging them up to share with the world.</p>
<p>A Backgrid.js extension is a directory structure that packages
the necessary JS, CSS, tests, and document files.</p>
<p>To create an extension, clone the tree into your file system and
type:</p>
<textarea class="code-snippet" data-mode="shell">
$ cd backgrid
$ make extension</textarea>
<p>A new extension directory structure should have been created for
you under <code>src/extensions</code>. The current implementation
of <code>make extension</code> only creates a blank directory
filled with a number of blank files for you. You should take a
look at other extensions to copy what you need. e.g. Makefile,
.gitignore.</p>
<h2>Extension Development Guide</h2>
<p>The following is a guideline for extension development:</p>
<ul>
<li>There should be 1 .js file and 1 .css file. If your code base
gets too large, consider breaking it into multiple extensions.</li>
<li>There should be 1 .min.js file and 1 .min.css file produced
for distribution.</li>
<li>Your Makefile should emulate other extensions as closely
as possible. Specifically, you should have a <code>dist</code>
rule that will take a <code>DIST_DIR</code> variable from
top-level make invocations and copy the output files to the
destination directory.</li>
<li>You should use recess to lint your CSS file(s).</li>
<li>You should follow the JS coding style defined <a
href="https://github.com/wyuenho/backgrid/blob/gh-pages/CONTRIBUTING.md#coding-style">here</a>.</li>
<li>Your .gitignore file inside the extension directory should
ignore all output files.</li>
<li>You should wrap your JS file in an immediately invoked
anonymous function that lists out your dependencies in the
parameter list.</li>
<li>Your extension should live under
the <code>Backgrid.Extension</code> module.</li>
<li>You should clearly specify your dependencies in the README
file if your extension relies on any libraries other than
Backgrid.js and its dependencies.</li>
<li>When in doubt, look at the other extensions for clues in
organizing your code.</li>
</ul>
</div>
<div class="row-fluid">
<div class="span3">
<h2 id="api-select-all">SelectAll</h2>
<ul class="nav">
<li><a href="api/index.html#!/api/Backgrid.Extension.SelectRowCell">Backgrid.Extension.SelectRowCell</a></li>
<li><a href="api/index.html#!/api/Backgrid.Extension.SelectAllHeaderCell">Backgrid.Extension.SelectAllHeaderCell</a></li>
</ul>
<h4>Best Used On</h4>
<ul>
<li>Desktop</li>
<li>Mobile</li>
</ul>
</div>
<div class="span9">
<h3>When to Use</h3>
<p>When you want to select multiple models at a time for batch operations.</p>
<textarea class="code-snippet" data-mode="htmlmixed">
<link rel="stylesheet" href="lib/extensions/select-all/backgrid-select-all.css" />
<script src="lib/extensions/select-all/backgrid-select-all.js"></script></textarea>
<h3>Usage</h3>
<p>To enable the SelectAll extension, you simply have to add a new
column to your column definition like so:</p>
<textarea class="code-snippet" data-mode="javascript" data-eval="yes">
var grid = new Backgrid.Grid({
columns: [{
// name is a required parameter, but you don't really want one on a select all column
name: "",
// Backgrid.Extension.SelectRowCell lets you select individual rows
cell: "select-row",
// Backgrid.Extension.SelectAllHeaderCell lets you select all the row on a page
headerCell: "select-all",
}].concat(columns),
collection: new Backbone.Collection([
{"name": "Afghanistan", "url": "http://en.wikipedia.org/wiki/Afghanistan", "pop": 25500100, "date": "2013-01-01", "percentage": 0.36, "id": 1},
{"name": "Albania", "url": "http://en.wikipedia.org/wiki/Albania", "pop": 2831741, "date": "2011-10-01", "percentage": 0.04, "id": 2}
])
});
$("#select-all-example-result").append(grid.render().el);</textarea>
</div>
</div>
<div class="row-fluid">
<div class="span9 offset3">
<h3>Result</h3>
<div id="select-all-example-result" class="backgrid-container" style="height: auto"></div>
</div>
</div>
<div class="row-fluid">
<div class="span9 offset3">
<h3>Getting to the Selected Models</h3>
<p>At any point during the lifetime of your program, if you'd like
to get an array of the currently selected models after you've
rendered your grid, you can easily do so:</p>
<textarea class="code-snippet" data-mode="javascript" data-eval="no">
// This method is only available on Backgrid.Grid after you've
// include the SelectAll extension.
grid.getSelectedModels();</textarea>
</div>
</div>
<div class="row-fluid">
<div class="span9 offset3">
<p class="label label-info">Pro Tip</p>
<p>Each SelectRowCell will trigger a <code>backgrid:select</code>
event directly from the selected models when its checkbox value
changes, so if you want to react to those events, you can attach
your event handlers on the collection.</p>
<p>See the <a
href="api/index.html#!/api/Backgrid.Extension.SelectRowCell">API
documentation</a> for details.</p>
</div>
</div>
<div class="row-fluid">
<div class="span3">
<h2 id="api-paginator">Paginator</h2>
<ul class="nav">
<li><a href="api/index.html#!/api/Backgrid.Extension.Paginator">Backgrid.Extension.Paginator</a></li>
</ul>
<h4>Best Used On</h4>
<ul>
<li>Desktop</li>
<li>Mobile</li>
</ul>
</div>
<div class="span9">
<h3>When to Use</h3>
<p>When you have more data than your grid can fit, you can use
Paginator to break the display of your data into pages.</p>
<h3>Prerequisites</h3>
<p>Backgrid.Extension.Paginator needs a Backbone.Collection
subclass that supports pagination. Luckily, there is already one
available specially written for this purpose
- <a href="https://github.com/wyuenho/backbone-pageable"
title="backbone-pageable">Backbone.PageableCollection</a>.</p>
<p>Backbone.PageableCollection is a strict superset of the vanilla