function hook_chart_definition_alter in Charts 8

Same name and namespace in other branches

1. 8.4 charts.api.php \hook_chart_definition_alter()
2. 7.2 charts.api.php \hook_chart_definition_alter()
3. 5.0.x charts.api.php \hook_chart_definition_alter()

Alter an individual chart's raw library representation.

This hook is called AFTER hook_chart_alter(), after Charts module has converted the renderable into the chart definition that will be used by the library. Note that the structure of $definition will differ based on the charting library used. Switching charting libraries may cause your code to break when using this hook.

Even though this hook may be fragile, it may provide developers with access to library-specific functionality.

@internal param $chart_id The chart ID, derived from the $chart['#chart_id'] property. Note that not* The chart ID, derived from the $chart['#chart_id'] property. Note that not all charts may have a $chart_id.

Parameters

$definition: The chart definition to be modified. The raw values are passed directly to the charting library.

$chart: The chart renderable. This may be used for reference (or read to add support for new properties), but any changes to this variable will not have an effect on output.

File

./charts.api.php, line 104

Documentation on hooks provided by the Charts module.

Code

function hook_chart_definition_alter(&$definition, $chart) {
  if ($chart['#chart_library'] === 'google') {
    $definition['options']['titleTextStyle']['fontSize'] = 20;
  }
  if ($chart['#chart_library'] === 'c3') {
    $definition['options']['titleTextStyle']['fontSize'] = 20;
  }
  elseif ($chart['#chart_library'] === 'highcharts') {
    $definition['title']['style']['fontSize'] = 20;
  }
}