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GoogleCharts.php
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GoogleCharts.php
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<?php
namespace mrlco\googlecharts;
use yii\base\Widget;
use yii\helpers\Html;
use yii\helpers\Json;
use yii\web\View;
/**
* A wrapper for google charts in Yii2
*
* @see https://github.com/mrlco/yii2-google-charts
* @author Mehran Barzandeh <[email protected]>
*/
class GoogleCharts extends Widget
{
/**
* @var string $jsApi Google charts js file.
*/
public $jsApi = 'https://www.google.com/jsapi';
/**
* @var string $containerId the visualization container Id to render charts in.
*/
public $containerId = null;
/**
* @var string $visualization the type of visualization. for example: PieChart
* @see https://google-developers.appspot.com/chart/interactive/docs/gallery
*/
public $visualization;
/**
* @var string $packages the type of packages, default is corechart
* @see https://google-developers.appspot.com/chart/interactive/docs/gallery
*/
public $packages = 'corechart';
/**
* @var string $loadVersion the version of google charts. Frozen chart versions are identified by number.
* @see https://google-developers.appspot.com/chart/interactive/docs/basic_load_libs#frozen-versions
*/
public $loadVersion = "1";
/**
* @var array $data the data to configure visualization
* @see https://google-developers.appspot.com/chart/interactive/docs/datatables_dataviews#arraytodatatable
*/
public $data = [];
/**
* @var array $options additional configuration options
* @see https://google-developers.appspot.com/chart/interactive/docs/customizing_charts
*/
public $options = [];
/**
* @var string $scriptAfterArrayToDataTable additional javascript to execute after arrayToDataTable is called
*/
public $scriptAfterArrayToDataTable = '';
/**
* @var array $htmlOption the HTML tag attributes configuration
*/
public $htmlOptions = [];
public function run()
{
$id = $this->getId();
if (isset($this->options['id']) and !empty($this->options['id'])) {
$id = $this->options['id'];
}
// if no container is set, it will create one
if ($this->containerId === null) {
$this->htmlOptions['id'] = 'div-chart' . $id;
$this->containerId = $this->htmlOptions['id'];
echo '<div ' . Html::renderTagAttributes($this->htmlOptions) . '></div>';
}
$this->registerClientScript($id);
}
/**
* Registers required client scripts
* @param string $id the visualization's (chart) identifier
*/
public function registerClientScript($id)
{
$jsData = Json::encode($this->data);
$jsOptions = Json::encode($this->options);
$script = '
google.setOnLoadCallback(drawChart' . $id . ');
var ' . $id . '=null;
function drawChart' . $id . '() {
var data = google.visualization.arrayToDataTable(' . $jsData . ');
' . $this->scriptAfterArrayToDataTable . '
var options = ' . $jsOptions . ';
' . $id . ' = new google.visualization.' . $this->visualization . '(document.getElementById("' . $this->containerId . '"));
' . $id . '.draw(data, options);
}';
$view = $this->getView();
$view->registerJsFile($this->jsApi, ['position' => View::POS_HEAD]);
$view->registerJs('google.load("visualization", "' . $this->loadVersion . '", {packages:["' . $this->packages . '"]});',
View::POS_HEAD, __CLASS__ . '#' . $id);
$view->registerJs($script, View::POS_HEAD, $id);
}
}