TbGoogleVisualizationChart.php

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<?php
class TbGoogleVisualizationChart extends CWidget
{
        public $containerId;

        public $visualization;

        public $data = array();

        public $options = array();

        public $htmlOptions = array();

        public function run()
        {
                $id = $this->getId();
                $this->htmlOptions['id'] = $id;
                // if no container is set, it will create one
                if ($this->containerId == null) {
                        $this->containerId = 'div-chart' . $id;
                        echo '<div ' . CHtml::renderAttributes($this->htmlOptions) . '></div>';
                }
                $this->registerClientScript();
        }

        public function registerClientScript()
        {
                $id = $this->getId();
                $jsData = CJavaScript::jsonEncode($this->data);
                $jsOptions = CJavaScript::jsonEncode($this->options);

                $script = '
                        google.setOnLoadCallback(drawChart' . $id . ');
                        var ' . $id . '=null;
                        function drawChart' . $id . '() {
                                var data = google.visualization.arrayToDataTable(' . $jsData . ');

                                var options = ' . $jsOptions . ';

                                ' . $id . ' = new google.visualization.' . $this->visualization . '(document.getElementById("' . $this->containerId . '"));
                                ' . $id . '.draw(data, options);
                        }';

                $cs = Yii::app()->getClientScript();
                $cs->registerScriptFile('https://www.google.com/jsapi');
                $cs->registerScript(
                        __CLASS__ . '#' . $id,
                        'google.load("visualization", "1", {packages:["corechart"]});',
                        CClientScript::POS_HEAD
                );
                $cs->registerScript($id, $script, CClientScript::POS_HEAD);
        }
}