ZingChart-Backbone

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ZingChart-Backbone

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Turn simple Models and Views into snazzy charts with our Backbone extension for ZingChart

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# Backbone.ZingChart

**Turning simple Models and Views into snazzy charts.**

## About

Backbone.ZingChart is a lighweight Backbone extension that allows for fast and simple creation of charts with a traditional Model and View structure.

## Installation

**Use our CDN**:
The easiest way to get started with backbone.zingchart is to use our [snazzy CDN](http://cdn.zingchart.com/). Just paste these scripts in your HTML file **after** your backbone.js file.

```
<script src="cdn.zingchart.com/zingchart.min.js"></script>
<script src="cdn.zingchart.com/backbone/backbone.zingchart.min.js"></script>
```

The first script loads the ZingChart file and the second one loads the actual backbone.zingchart wrapper. Both are necessary for this wrapper to work.

**Install with Bower**:
The next simplest solution is to install via [bower](http://bower.io/). Just use `bower install backbone-zingchart` and reference the script in your HTML file **after** your backbone.js file.

**Git Clone**:
Alternatively, you could simply clone this repo.

## Getting Started

View the files in the [example directory](examples) for working samples.

You must have the ZingChart library loaded. We suggest you use our [CDN](http://cdn.zingchart.com/) to keep up to date with the latest build.

In addition, you must include this library.  We support inclusion through [require.js](http://requirejs.org/) and you can view an example in the examples directory.  For now, we will do a simple script include.

A simple example:

```javascript
// Create ZingChart Model Passing in Data to Plot
var chartData = new ZingChart.ZingChartModel(
            {
                data: [[3,2,3,3,9] , [1,2,3,4,5]],
                charttype: 'bar',
                width: 500,
                height: 400
            });

// Render the Chart
// Note that the el must already be added to the DOM
var chartView = new ZingChart.ZingChartView({model: chartData, el: $('#chartDiv')});
chartView.render();
```
Passing in a full JSON structure:

```javascript
var json = {    
            "type":"pie",
            "series":[
                {
                    "text":"Apples",
                    "values":[5]
                },
                {
                    "text":"Oranges",
                    "values":[8]
                },
                {
                    "text":"Bananas",
                    "values":[22]
                }
            ]
        };
        
var chartData = new ZingChart.ZingChartModel(
            {
                json: json
            });

// Render the Chart
// Note that the el must already be added to the DOM
var chartView = new ZingChart.ZingChartView({model: chartData, el: $('#chartDiv')});
chartView.render();

```

After the chart is rendered, it is possible to change the json or data simply by updating the `ZingChartModel.json` or `ZingChartModel.data` property respectively.

#### Change the Chart Data:

```javascript
var newData = [
	[50,32,36,8,10],
	[34,64,23,54,41],
	[12,43,51,39,29]
];

chartData.set('data', newData);

```

#### Change the entire Chart JSON:

```javascript
var newJSON = {
	"type":"area",
	"series":[
	   	{
       	"values":[11,36,7,44,11,28,42,26,13,32,12,24,16,11,43,39]
	   	},
	   	{
       	"values":[21,29,14,16,28,35,21,18,11,7,4,9,25,15,33,13]
	   	}
	]
};
  
chartData.set('json', newJSON);

```

The Extension includes full access to the ZingChart API [methods](http://www.zingchart.com/docs/api/api-methods/) and [events](http://www.zingchart.com/docs/api/api-events/).

You can access the API methods by calling the view's `exec` method.

```javascript
var values = [39,26,54,28,51,44];

chartView.exec('addplot', {
	data : {
   		values : values
   }
 });
  
```

If you include the extended javascript file, there is individual access to every API method.

```javascript
var values = [39,26,54,28,51,44];

chartView.addPlot({
	data:{
   		values: values
   }
});

```

You can access the API events by using the view's bind method to bind to the ZingChart events.

```javascript
chartView.bind('legend_item_click', myClickCallback);

```

If you include the extended javascript file, there is individual access to all of the events.

```javascript
chartView.legendItemClick(myClickCallback);
```

### ZingChart.ZingChartModel
Represents ZingChart object. Extends Backbone.Model.
                
#### Properties
<table>
	<tr>
		<td>Property</td><td>Default Value</td><td>Description</td>
	</tr>
	<tr>
		<td>charttype</td>
		<td>line</td>
		<td>The chart type.  Only used if rendering from data and not from full JSON</td>
	</tr>
	<tr>
		<td>data</td>
		<td>[]</td>
		<td>Array of chart data.  A chart can be automatically generated based soley on the data.</td>
	</tr>
	<tr>
		<td>defaults</td>
		<td>{}</td>
		<td>Object of default render settings. Can be used to apply settings to all charts rendered from that model, even ones rendered from updates to json or data</td>
	</tr>
	<tr>
		<td>height</td>
		<td>480</td>
		<td>The height of the rendered chart.</td>
	</tr>
	<tr>
		<td>json</td>
		<td>{}</td>
		<td>A complete ZingChart JSON packet.</td>
	</tr>
    <tr>
		<td>width</td>
		<td>640</td>
		<td>The width of the rendered chart.</td>
	</tr>
</table>

## Documentation

### ZingChart.ZingChartView

View controller for a ZingChart.ZingChartView. Extends Backbone.View.

#### Properties

<table>
	<tr>
		<td>Property</td>
		<td>Default Value</td>
		<td>Description</td>
	</tr>
	<tr>
		<td>el</td>
		<td></td>
		<td>The el where the chart should be rendered.  The el must already be included in the DOM.</td>
	</tr>
    <tr>
		<td>model</td>
		<td>ZingChart.ZingChartView</td>
		<td>The model that is used to generate the ZingChart.</td>
	</tr>
	
</table>

#### Methods
<table>
	<tr>
		<td>Method</td>
		<td>Parameters</td>
		<td>Return Value</td>
		<td>Description</td>
	</tr>
	<tr>
		<td>render</td>
		<td></td>
		<td></td>
		<td>Renders the ZingChart in the given el based on the ZingChartModel data.</td>
	</tr>
	<tr>
		<td>bind</td>
		<td>eventname, callback</td>
		<td>this</td>
		<td>Binds the ZingChart event to the given callback.  <a href="http://www.zingchart.com/docs/api/api-events/">View ZingChart Events</a> </td>
	</tr>
	<tr>
		<td>exec</td>
		<td>apimethod, apioptions</td>
		<td>The results of the API call</td>
		<td>Calls a ZingChart API method and passes it the given options.  <a href="http://www.zingchart.com/docs/api/api-methods/">View ZingChart Methods</a> </td>
	</tr>
	
</table>

## In The Wild...

Here at ZingChart, we're currently using this extension on our [gallery chart view](http://www.zingchart.com/gallery/chart/#mixed-time-series-zoom). It allows us to tie the a `ZingChartModel` and `ZingChartView` to our Chart view, allowing for streamlined updating of charts via AJAX. The result is a smaller codebase and less boilerplate.

If you're using the backbone-zingchart extension on your own project, <a href="mailto:support@zingchart.com?Subject=Backbone-ZingChart%20in%20the%20Wild" target="_top">let us know!</a> We'd love to feature it.

## Issues

Found a bug or have a feature request? Submit an issue and we'll get to work.

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