function _google_charts_data_codingsimple in Charts 6

Same name and namespace in other branches

1. 7 google_charts/google_charts.inc \_google_charts_data_codingsimple()

Encode the Chart data into a Alphanumeric code, follwing the Google Chart API instruction. Its needed because there is a size limmit to URL strings. So we reduce the amount of characters.

It basicly uses a scale of 61 levels to represent each chart value. If a more precise scale is needed, see _google_charts_codingextended(), which produces a 4000 levels, but also a bigger URL string.

Parameters

$data: Array. A series of numeric data values

Return value

String. The string presentation of series data

1 call to _google_charts_data_codingsimple()

_google_charts_series in google_charts/google_charts.inc

Convert all Series-level data.

File

google_charts/google_charts.inc, line 86

@author Bruno Massa http://drupal.org/user/67164

Code

function _google_charts_data_codingsimple($value, $max) {

  // Set the list of characters and the size of the list
  $simple = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789';
  $simple_len = drupal_strlen($simple) - 1;
  if ($value >= 0) {
    return $simple[round($simple_len * $value / $max)];
  }
  else {
    return '_';
  }
}