ChartJs For Yii2
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README.md

ChartJs Widget

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Renders a ChartJs plugin widget

Installation

The preferred way to install this extension is through composer. This requires the composer-asset-plugin, which is also a dependency for yii2 – so if you have yii2 installed, you are most likely already set.

Either run

composer require 2amigos/yii2-chartjs-widget:~2.0

or add

"2amigos/yii2-chartjs-widget" : "~2.0"

to the require section of your application's composer.json file.

Usage

The following types are supported:

  • Line
  • Bar
  • Radar
  • Polar
  • Pie
  • Doughnut
  • Bubble
  • Scatter
  • Area
  • Mixed

The following example is using the Line type of chart. Please, check ChartJs plugin documentation for the different types supported by the plugin.

use dosamigos\chartjs\ChartJs;

<?= ChartJs::widget([
    'type' => 'line',
    'options' => [
        'height' => 400,
        'width' => 400
    ],
    'data' => [
        'labels' => ["January", "February", "March", "April", "May", "June", "July"],
        'datasets' => [
            [
                'label' => "My First dataset",
                'backgroundColor' => "rgba(179,181,198,0.2)",
                'borderColor' => "rgba(179,181,198,1)",
                'pointBackgroundColor' => "rgba(179,181,198,1)",
                'pointBorderColor' => "#fff",
                'pointHoverBackgroundColor' => "#fff",
                'pointHoverBorderColor' => "rgba(179,181,198,1)",
                'data' => [65, 59, 90, 81, 56, 55, 40]
            ],
            [
                'label' => "My Second dataset",
                'backgroundColor' => "rgba(255,99,132,0.2)",
                'borderColor' => "rgba(255,99,132,1)",
                'pointBackgroundColor' => "rgba(255,99,132,1)",
                'pointBorderColor' => "#fff",
                'pointHoverBackgroundColor' => "#fff",
                'pointHoverBorderColor' => "rgba(255,99,132,1)",
                'data' => [28, 48, 40, 19, 96, 27, 100]
            ]
        ]
    ]
]);
?>

Plugins usage example (displaying percentages on the Pie Chart):

echo ChartJs::widget([
    'type' => 'pie',
    'id' => 'structurePie',
    'options' => [
        'height' => 200,
        'width' => 400,
    ],
    'data' => [
        'radius' =>  "90%",
        'labels' => ['Label 1', 'Label 2', 'Label 3'], // Your labels
        'datasets' => [
            [
                'data' => ['35.6', '17.5', '46.9'], // Your dataset
                'label' => '',
                'backgroundColor' => [
                        '#ADC3FF',
                        '#FF9A9A',
                    'rgba(190, 124, 145, 0.8)'
                ],
                'borderColor' =>  [
                        '#fff',
                        '#fff',
                        '#fff'
                ],
                'borderWidth' => 1,
                'hoverBorderColor'=>["#999","#999","#999"],                
            ]
        ]
    ],
    'clientOptions' => [
        'legend' => [
            'display' => false,
            'position' => 'bottom',
            'labels' => [
                'fontSize' => 14,
                'fontColor' => "#425062",
            ]
        ],
        'tooltips' => [
            'enabled' => true,
            'intersect' => true
        ],
        'hover' => [
            'mode' => false
        ],
        'maintainAspectRatio' => false,

    ],
    'plugins' =>
        new \yii\web\JsExpression('
        [{
            afterDatasetsDraw: function(chart, easing) {
                var ctx = chart.ctx;
                chart.data.datasets.forEach(function (dataset, i) {
                    var meta = chart.getDatasetMeta(i);
                    if (!meta.hidden) {
                        meta.data.forEach(function(element, index) {
                            // Draw the text in black, with the specified font
                            ctx.fillStyle = 'rgb(0, 0, 0)';

                            var fontSize = 16;
                            var fontStyle = 'normal';
                            var fontFamily = 'Helvetica';
                            ctx.font = Chart.helpers.fontString(fontSize, fontStyle, fontFamily);

                            // Just naively convert to string for now
                            var dataString = dataset.data[index].toString()+'%';

                            // Make sure alignment settings are correct
                            ctx.textAlign = 'center';
                            ctx.textBaseline = 'middle';

                            var padding = 5;
                            var position = element.tooltipPosition();
                            ctx.fillText(dataString, position.x, position.y - (fontSize / 2) - padding);
                        });
                    }
                });
            }
        }]')
])

Further Information

ChartJs has lots of configuration options. For further information, please check the ChartJs plugin website.

Contributing

Please see CONTRIBUTING for details.

Credits

License

The BSD License (BSD). Please see License File for more information.

2amigOS!
Custom Software | Web & Mobile Software Development
www.2amigos.us