chart.api.php in Google Chart Tools: Image Charts 6
Same filename and directory in other branches
Hooks provided by the Chart module.
File
chart.api.phpView source
<?php
/**
 * @file
 * Hooks provided by the Chart module.
 */
/**
 * Perform alterations on a chart before it's rendered.
 *
 * @param $chart
 *   An associative array defining a chart.
 */
function hook_chart_alter(&$chart) {
  if ($chart['#chart_id'] == 'foo') {
    // Change the data color to blue.
    $chart['#data_colors'] = array(
      '027AC6',
    );
  }
}Functions
| Name   | Description | 
|---|---|
| hook_chart_alter | Perform alterations on a chart before it's rendered. | 
