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LineChart.php
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LineChart.php
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<?php
namespace bsadnu\googlecharts;
use Yii;
use yii\base\Widget;
use yii\helpers\Html;
use yii\helpers\Json;
use yii\web\View;
use bsadnu\googlecharts\GoogleJsApiAsset;
/**
* Line chart widget.
* A line chart or line graph is a type of chart which displays information as a series of data points called 'markers' connected by straight line segments.
* Line Charts show how a particular data changes at equal intervals of time.
* A line chart is rendered within the browser using SVG or VML. Displays tips when hovering over points.
*
* @author Stanislav Bannikov <bsadnu@gmail.com>
*/
class LineChart extends Widget
{
/**
* @var string unique id of chart
*/
public $id;
/**
* @var boolean whether chart is interval-style.
* Below is an example of line intervals.
* Intervals around a series might be used to portray confidence intervals, minimum and maximum values around a value, percentile sampling,
* or anything else that requires a varying margin around a series.
* Line intervals are sometimes used to show the raw data from which a trendline was extracted.
* To draw a trendline on a chart, use the trendlines option and specify which data series to use.
*
* An area interval renders interval data as a set of nested shaded areas.
* Nesting of pairs of columns is similar to that of box intervals, except that an even number of columns is required.
* This is accomplished by setting style to 'area'.
* There are six styles of interval: line, bar, box, stick, point, and area.
* For even greater customization, intervals styles can be combined inside one chart.
*
* <?= LineChart::widget([
* 'id' => 'my-line-intervals-id',
* 'isIntervalType' => true,
* 'data' => [
* ['a', 100, 90, 110, 85, 96, 104, 120],
* ['b', 120, 95, 130, 90, 113, 124, 140],
* ['c', 130, 105, 140, 100, 117, 133, 139],
* ['d', 90, 85, 95, 85, 88, 92, 95],
* ['e', 70, 74, 63, 67, 69, 70, 72],
* ['f', 30, 39, 22, 21, 28, 34, 40],
* ['g', 80, 77, 83, 70, 77, 85, 90],
* ['h', 100, 90, 110, 85, 95, 102, 110]
* ],
* 'options' => [
* 'fontName' => 'Verdana',
* 'height' => 400,
* 'curveType' => 'function',
* 'fontSize' => 12,
* 'chartArea' => [
* 'left' => '5%',
* 'width' => '90%',
* 'height' => 350
* ],
* 'lineWidth' => 3,
* 'tooltip' => [
* 'textStyle' => [
* 'fontName' => 'Verdana',
* 'fontSize' => 13
* ]
* ],
* 'series' => [
* [
* 'color' => '#EF5350'
* ]
* ],
* 'intervals' => [
* 'style' => 'line' //you may use six styles of interval: line, bar, box, stick, point, and area
* ],
* 'pointSize' => 5,
* 'vAxis' => [
* 'title' => 'Number values',
* 'titleTextStyle' => [
* 'fontSize' => 13,
* 'italic' => false
* ],
* 'gridlines' => [
* 'color' => '#e5e5e5',
* 'count' => 10
* ],
* 'minValue' => 0
* ],
* 'legend' => 'none'
* ]
* ]) ?>
*/
public $isIntervalType = false;
/**
* @var array table of data
* Example:
* [
* ['Year', 'Sales', 'Expenses'],
* ['2004', 1000, 400],
* ['2005', 1170, 460],
* ['2006', 660, 1120],
* ['2007', 1030, 540]
* ]
*/
public $data = [];
/**
* @var array options
* Example:
* [
* 'fontName' => 'Verdana',
* 'height' => 400,
* 'curveType' => 'function',
* 'fontSize' => 12,
* 'chartArea' => [
* 'left' => '5%',
* 'width' => '90%',
* 'height' => 350
* ],
* 'pointSize' => 4,
* 'tooltip' => [
* 'textStyle' => [
* 'fontName' => 'Verdana',
* 'fontSize' => 13
* ]
* ],
* 'vAxis' => [
* 'title' => 'Sales and Expenses',
* 'titleTextStyle' => [
* 'fontSize' => 13,
* 'italic' => false
* ],
* 'gridlines' => [
* 'color' => '#e5e5e5',
* 'count' => 10
* ],
* 'minValue' => 0
* ],
* 'legend' => [
* 'position' => 'top',
* 'alignment' => 'center',
* 'textStyle' => [
* 'fontSize' => 12
* ]
* ]
* ]
*/
public $options = [];
/**
* Initializes the widget.
*/
public function init()
{
parent::init();
$view = Yii::$app->getView();
$this->registerAssets();
$view->registerJs($this->getJs(), View::POS_END);
}
/**
* Renders the widget.
*/
public function run()
{
$content = Html::tag('div', null, ['id'=> $this->id]);
return $content;
}
/**
* Registers necessary assets.
*/
public function registerAssets()
{
$view = $this->getView();
GoogleJsApiAsset::register($view);
}
/**
* Return necessary javascript.
*/
private function getJs()
{
$uniqueInt = mt_rand(1, 999999);
$js = "
google.load('visualization', '1', {packages:['corechart']});
google.setOnLoadCallback(drawLineChart". $uniqueInt .");
";
if (!$this->isIntervalType) {
$js .= "
function drawLineChart". $uniqueInt ."() {
var data". $uniqueInt ." = google.visualization.arrayToDataTable(". Json::encode($this->data) .");
var options". $uniqueInt ." = ". Json::encode($this->options) .";
var line_chart". $uniqueInt ." = new google.visualization.LineChart($('#". $this->id ."')[0]);
line_chart". $uniqueInt .".draw(data". $uniqueInt .", options". $uniqueInt .");
}
";
} else {
$js .= "
function drawLineChart". $uniqueInt ."() {
var data". $uniqueInt ." = new google.visualization.DataTable();
data". $uniqueInt .".addColumn('string', 'x');
data". $uniqueInt .".addColumn('number', 'values');
data". $uniqueInt .".addColumn({id:'i0', type:'number', role:'interval'});
data". $uniqueInt .".addColumn({id:'i1', type:'number', role:'interval'});
data". $uniqueInt .".addColumn({id:'i2', type:'number', role:'interval'});
data". $uniqueInt .".addColumn({id:'i2', type:'number', role:'interval'});
data". $uniqueInt .".addColumn({id:'i2', type:'number', role:'interval'});
data". $uniqueInt .".addColumn({id:'i2', type:'number', role:'interval'});
data". $uniqueInt .".addRows(". Json::encode($this->data) .");
var options". $uniqueInt ." = ". Json::encode($this->options) .";
var line_chart". $uniqueInt ." = new google.visualization.LineChart($('#". $this->id ."')[0]);
line_chart". $uniqueInt .".draw(data". $uniqueInt .", options". $uniqueInt .");
}
";
}
$js .= "
$(function () {
$(window).on('resize', resize);
$('.sidebar-control').on('click', resize);
function resize() {
drawLineChart". $uniqueInt ."();
}
});
";
return $js;
}
}