public function Highcharts::preRender in Charts 8.4

Same name and namespace in other branches

1. 5.0.x modules/charts_highcharts/src/Plugin/chart/Library/Highcharts.php \Drupal\charts_highcharts\Plugin\chart\Library\Highcharts::preRender()

Pre render.

Parameters

array $element: The element.

Return value

array The chart element.

Overrides ChartInterface::preRender

File

modules/charts_highcharts/src/Plugin/chart/Library/Highcharts.php, line 155

Class

Highcharts

Defines a concrete class for a Highcharts.

Namespace

Drupal\charts_highcharts\Plugin\chart\Library

Code

public function preRender(array $element) {

  // Populate chart settings.
  $chart_definition = [];
  $chart_definition = $this
    ->populateOptions($element, $chart_definition);
  $chart_definition = $this
    ->populateAxes($element, $chart_definition);
  $chart_definition = $this
    ->populateData($element, $chart_definition);

  // Remove machine names from series. Highcharts series must be an array.
  $series = array_values($chart_definition['series']);
  unset($chart_definition['series']);

  // Trim out empty options (excluding "series" for efficiency).
  ChartElement::trimArray($chart_definition);

  // Put back the data.
  $chart_definition['series'] = $series;
  if (!isset($element['#id'])) {
    $element['#id'] = Html::getUniqueId('highchart-render');
  }
  $element['#attached']['library'][] = 'charts_highcharts/highcharts';
  $element['#attributes']['class'][] = 'charts-highchart';
  $element['#chart_definition'] = $chart_definition;
  return $element;
}