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ember-google-charts

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Google's Material charts made easy for Ember apps - http://sir-dunxalot.github.io/ember-google-charts/

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Ember Google Charts [![Build Status](https://travis-ci.org/sir-dunxalot/ember-google-charts.svg)](https://travis-ci.org/sir-dunxalot/ember-google-charts) [![npm](https://img.shields.io/npm/v/ember-google-charts.svg)](https://www.npmjs.com/package/ember-google-charts)
======

Ember Google Charts makes it very easy to implement [Google Charts](https://developers.google.com/chart/) in Ember CLI apps.

All dependencies are lazy loaded using the [Google JS API Loader](https://developers.google.com/loader/?hl=en), which intelligently caches requests between a user's sessions.

![](http://sir-dunxalot.github.io/ember-google-charts/ember-google-charts-26d23374a6e3e3d7bc0bf51e4540c0ec.jpg)

## Installation

```sh
ember install ember-google-charts
```

See the [demo app](http://sir-dunxalot.github.io/ember-google-charts/) here.

- [Charts](#charts)
  - [Default options](#default-options)
  - [Locales](#locales)
  - [Resize](#resize)
- [Actions](#actions)
  - [chartDidRender()](#chartdidrender)
  - [packagesDidLoad()](#packagesdidload)
- [Events](#events)
- [Custom Charts](#custom-charts)
- [Content Security Policy](#content-security-policy)
- [Testing](#testing)
  - [renderChart()](#renderchart)
  - [assertChart()](#assertchart)
- [Development](#development)

## Usage

### Charts

There are six types of chart supported out of the box:

- Area Charts (`{{area-chart}}`)
- Bar Charts (`{{bar-chart}}`)
- Geo Charts (`{{geo-chart}}`)
- Line Charts (`{{line-chart}}`)
- Pie Charts (`{{pie-chart}}`)
- Scatter Charts (`{{scatter-chart}}`)

To add a chart to any route, simply add the relevant component:

```hbs
<AreaChart @data={{this.model}} @options={{this.options}} />
```

Or if you're using an old template syntax:

```hbs
{{area-chart data=data options=options}}
```

Data and options should be in the format expected by the given chart, as detailed in the [Google Charts documentation](https://developers.google.com/chart/interactive/docs/).

For example:

```js
/* stats/route.js */

import Route from '@ember/routing/route';

export default Route.extend({

model() {
    return [
      ['Task', 'Hours per Day'],
      ['Work', 11],
      ['Eat', 2],
      ['Commute', 2],
      ['Watch TV', 2],
      ['Sleep', 7],
    ];
  },

});
```

```js
/* stats/controller.js */

import Controller from '@ember/controller';

export default Controller.extend({

options: {
    title: 'How I spend my days',
    height: 300,
    width: 400,

animation: {
      startup: true,
      easing: 'inAndOut',
    },
  },

});
```

```hbs
{{!-- stats/template.hbs --}}

<PieChart @data={{this.model}} @options={{this.options}} />
```

You can pass data as an array (see above example) or as a [Google Data Table](https://developers.google.com/chart/interactive/docs/datatables_dataviews):

```js
/* stats/route.js */

import Route from '@ember/routing/route';

export default Route.extend({

model() {
    return google.visualization.arrayToDataTable([
      ['Year', 'Sales', 'Expenses'],
      ['2004', 1000, 400],
      ['2005', 1170, 460],
    ], false);
  },

});
```

```hbs
{{!-- stats/template.hbs --}}

<PieChart @data={{this.model}} @options={{this.options}} />
```

For more information about data tables and how to create them, see the [Google Charts guides](https://developers.google.com/chart/interactive/docs/datatables_dataviews).

Where possible, this addon default to using Material Charts over Google's 'classic' design.

It's very easy to add non-default charts (e.g. table charts or gauge charts) - [see the custom charts docs here](#custom-charts)

#### Design

Indicate which design you want: `classic` or `material`.

```hbs
<BarChart @data={{this.model}} @options={{this.options}} @design="classic" />
```

Only some chart types support Material Charts. See the [Google Charts documentation](https://developers.google.com/chart/interactive/docs) Chart Types to learn more.

#### Default Options

Default options for all charts can be set in the `GoogleChartsService`.

**Default options are always merged with the options you pass into a component.** Passed in options will only override specific options properties, not the whole options object.

```js
/* services/google-charts.js */

import GoogleChartsService from 'ember-google-charts/services/google-charts';

export default GoogleChartsService.extend({

defaultOptions: {
    backgroundColor: '#389fcc',
    annotations: {
      alwaysOutside: true,
    },
  },

});
```

You can also set default options for individual components by overriding `defaultOptions` for the component. For example, if you want a [custom chart component](#custom-charts) to use different default options:

```js
/* components/gantt-chart.js */

import GoogleChart from 'ember-google-charts/components/google-chart';
import renderMaterialChart from 'ember-google-charts/utils/render-material-chart';

export default GoogleChart.extend({
  type: 'gantt',

defaultOptions: {
    backgroundColor: '#389fcc',
    annotations: {
      alwaysOutside: true,
    },
  },

renderChart: renderMaterialChart,
});
```

```
```

#### Locales

You can set the language of the charts you render by specifying the language code in the `google-charts` service:

```js
/* services/google-charts.js */

import GoogleChartsService from 'ember-google-charts/services/google-charts';

export GoogleChartsService.extend({
  language: 'fr',
});
```

For more information on locales, see the [Google Charts documentation](https://developers.google.com/chart/interactive/docs/basic_load_libs#loadwithlocale).

Please note, Google Charts dependencies can only be loaded for a single language. This is a [limitation](https://developers.google.com/chart/interactive/docs/basic_load_libs#basic-library-loading) of the Google API loader.

#### Resize

By default charts will rerender when the window size changes. You can opt out of this by setting `responsiveResize` to false:

```hbs
{{pie-chart data=data responsiveResize=false}}
```

### Actions

Two actions are available for you to hook on to:

#### chartDidRender()

This fires when the Google chart has rendered and is ready for interaction via Google Charts public methods.

This action receives the `chart` object of the rendered chart.

```js
/* stats/controller.js */

import Controller from '@ember/controller';

export default Controller.extend({

actions: {
    selectCountry(chart) {
      chart.setSelection('someValue');
    },
  },

});
```

```hbs
{{!-- stats/template.hbs --}}

<GeoChart
  @data={{this.model}}
  @options={{this.options}}
  @chartDidRender=(action 'selectCountry')
/>
```

#### packagesDidLoad()

This fires when the Google chart has finished loading the required Google packages for a specific chart.

This action receives no params.

```js
/* stats/controller.js */

import Controller from '@ember/controller';

export default Controller.extend({

actions: {
    checkGoogleExists() {
      if (window.google) {
        // Do something...
      }
    },
  },

});
```

```hbs
{{!-- stats/template.hbs --}}

<LineChart
  @data={{this.model}}
  @options={{this.options}}
  @packagesDidLoad=(action 'checkGoogleExists')
/>
```

### Events

It's easy to listen to events emitted by a chart:

```js
/* stats/controller.js */

import Controller from '@ember/controller';

export default Controller.extend({

actions: {
    addChartEventListeners(chart) {
      const { google: { visualization } } = window;

visualization.events.addListener(chart, 'onmouseover', function(event) {
        /* Do something here... */;
      });
    }
  },

});
```

```hbs
{{!-- stats/template.hbs --}}

<LineChart
  @data={{this.model}}
  @options={{this.options}}
  @chartDidRender=(action 'addChartEventListeners')
/>
```

For more information on events, see the [Google Charts event documentation](https://developers.google.com/chart/interactive/docs/events).

### Custom Charts

All chart components in this addon extend from a single core component: the `GoogleChartComponent`.

1. Find the type of chart in [the Google guides](https://developers.google.com/chart/interactive/docs/) and see what Google Charts package it requires
2. Update the [Google Chart service](https://github.com/sir-dunxalot/ember-google-charts/blob/master/addon/services/google-charts.js) `packages` property with the new Google Charts package you require (if applicable)
3. Specify whether to use `'material'` or `'classic'` design (depending on what Google Charts documentation says the chart type supports)

```js
/* components/gantt-chart.js */

import GoogleChart from 'ember-google-charts/components/google-chart';

export default GoogleChart.extend({
  design: 'classic',
  type: 'gantt',
});
```

```js
/* services/google-charts.js */

import GoogleChartsService from 'ember-google-charts/services/google-charts';

export GoogleChartsService.extend({
  googlePackages: ['corechart', 'bar', 'line', 'scatter', 'gantt'], // Added gantt to defaults
});
```

If preferred, you can write your own `renderChart` method. Use the [`renderChart` util as your guide](https://github.com/sir-dunxalot/ember-google-charts/blob/master/addon/utils/render-chart.js).

`renderChart()` receives the DOM Element in which to render the chart followed by the chart properties, which is an object that should include the following properties:
  - `data` (see usage instructions)
  - `design` (`'material'` or `'classic'`)
  - `options` (see usage instructions)
  - `type` (e.g. `'bar'`, `'line'`, etc)

`renderChart()` must return a promise that resolves with the chart object (`resolve(chart)`).

### Content Security Policy

You will need to add the following to your app's [content security policy](https://github.com/rwjblue/ember-cli-content-security-policy) to mitigate CSP errors:

```js
contentSecurityPolicy: {
  'script-src': "'self' 'unsafe-eval' *.google.com *.gstatic.com",
  'style-src': "'self' 'unsafe-inline' *.google.com *.googleapis.com *.gstatic.com",
  'font-src': "'self' *.gstatic.com *.googleapis.com",
}
```

## Testing

This addon makes two test helpers available that you can use in your app's test suite:

- `renderChart()`
- `assertChart()`

### renderChart()

`renderChart()` is an async helper that renders a chart using `@ember/test-helpers`'s `render()` method.

You must pass in an ES6 tagged template string, as is expected by `render()`, [documented here](https://github.com/emberjs/ember-test-helpers/blob/master/API.md#render), so this helper is designed for use in integration tests.

For convenience, `renderChart()` returns the chart's DOM element.

For example:

```js
/* tests/integration/some-test */

import { module } from 'qunit';
import { setupRenderingTest } from 'ember-qunit';
import { renderChart } from 'ember-google-charts/test-support';

module('Integration | Component | pretty color', function(hooks) {
  setupRenderingTest(hooks);

test('Rendering the expenses chart', async function(assert) {
    this.set('data', [
      ['Year', 'Sales', 'Expenses'],
      ['2004', 1000, 400],
      ['2005', 1170, 460],
      ['2006', 660, 1120],
      ['2007', 1030, 540],
    ]);

const chart = await renderChart(hbs`{{area-chart data=data}}`);

/* Now run some assertions... */

assert.ok(chart.textContent.indexOf('2007') > -1,
      'Should contain 2007 data');

});

```

`renderChart()` adds a delay to your test suite that can be removed if you desire (but this may fail test suites in remote environments, like Travis):

```js
const chart = await renderChart(hbs`{{area-chart data=data}}`, {
  delay: 0, // Or some number of milliseconds
});
```

### assertChart()

`assertChart()` runs a series of predefined assertions on any chart element to assert that the chart has been rendered correctly.

`assertChart()` expects several params to be passed:

- `assert`, which is available in all 'ember-qunit' tests
- `chart`, which is the chart's element and is returned by the [`renderChart()` test helper](#renderchart)
- `properties`, which is an object that should include the properties passed into the chart component:
  - `data`
  - `design` (`'material'` or `'classic'`)
  - `options`
  - `type` (e.g. `'bar'`, `'line'`, etc)

Here is an example, which also uses `renderChart()`:

```js
/* tests/integration/some-test */

import { module } from 'qunit';
import { setupRenderingTest } from 'ember-qunit';
import { assertChart, renderChart } from 'ember-google-charts/test-support';

module('Integration | Component | pretty color', function(hooks) {
  setupRenderingTest(hooks);

const data = [
    ['Year', 'Sales', 'Expenses'],
    ['2004', 1000, 400],
    ['2005', 1170, 460],
    ['2006', 660, 1120],
    ['2007', 1030, 540],
  ];

const options = {
    title: 'Yearly expenses',
    animation: {
      startup: true,
      easing: 'inAndOut',
    },
  };

test('Rendering the expenses chart', async function(assert) {

this.setProperties({
      data,
      options,
    });

const chart = await renderChart(hbs`{{area-chart data=data options=options}}`);

assertChart(assert, chart, {
      data,
      design: 'classic', // Because it's not a Material Chart
      options,
      type: 'area',
    });
  });
});

```

## Development

All PRs and issues are welcome.

- `git clone https://github.com/sir-dunxalot/ember-google-charts.git`
- `cd ember-tooltips`
- `npm install && bower install`
- `ember s`
- `ember test`, `ember try:testall`, or the `/tests` route

Please include tests and documentation updates with any new features.

You do not need to bump the version when you have a PR.

To release an update to the demo app:

```sh
git checkout master # make sure you're on master branch
ember github-pages:commit --message "Some commit message" # Builds the app
git push origin gh-pages:gh-pages # Deploys the app
```

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