* @package simpleSAMLphp */ class sspmod_statistics_Graph_GoogleCharts { private $x, $y; /** * Constructor. * * Takes dimension of graph as parameters. X and Y. * * @param $x X dimension. Default 800. * @param $y Y dimension. Default 350. */ public function __construct($x = 800, $y = 350) { $this->x = $x; $this->y = $y; } private function encodeaxis($axis) { return join('|', $axis); } # t:10.0,58.0,95.0 private function encodedata($datasets) { $setstr = array(); foreach ($datasets AS $dataset) { $setstr[] = self::extEncode($dataset); } return 'e:' . join(',', $setstr); } public static function extEncode($values) { #}, $max = 4095, $min = 0){ $extended_table = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-.'; $chardata = ''; $delta = 4095; $size = (strlen($extended_table)); foreach($values as $k => $v){ if($v >= 0 && $v <= 100){ $first = substr($extended_table, intval( ($delta*$v/100) / $size),1); $second = substr($extended_table, intval( ($delta*$v/100) % $size), 1); $chardata .= "$first$second"; #echo '

encoding ' . $v . ' to ' . $first . ' ' . $second . ''; } else { $chardata .= '__'; // Value out of max range; } } #echo ' encoding ' . join(' ', $values) . ' to ' . $chardata; exit; return($chardata); } /** * Return colors between multiple graphs... */ private function getFillArea($datasets) { if (count($datasets) < 2) return ''; $colors = array('eeeeee', 'cccccc', 'aaaaaa', '99eecc'); $num = count($datasets) ; $colstr = array(); for ($i = 0; $i < $num; $i++) { $colstr[] = 'b' . ',' . $colors[$i] . ',' . ($i) . ',' . ($i+1) . ',0'; } return '&chm=' . join('|', $colstr); } /** * Generate a Google Charts URL which points to a generated image. * More documentation on Google Charts here: * http://code.google.com/apis/chart/ * * @param $axis Axis * @param $axpis Axis positions * @param $datasets Datasets values * @param $max Max value. Will be the topmost value on the Y-axis. */ public function show($axis, $axispos, $datasets, $maxes) { $labeld = '&chxt=x,y' . '&chxr=0,0,1|1,0,' . $maxes[0]; if (count($datasets) > 1) { if (count($datasets) !== count($maxes)) { throw new Exception('Incorrect number of max calculations for graph plotting.'); } $labeld = '&chxt=x,y,r' . '&chxr=0,0,1|1,0,' . $maxes[0] . '|2,0,' . $maxes[1]; } $url = 'http://chart.apis.google.com/chart?' . // Dimension of graph. Default is 800x350 'chs=' . $this->x . 'x' . $this->y . // Dateset values. '&chd=' . $this->encodedata($datasets) . // Fill area... # $this->getFillArea($datasets) . '&chco=ff5c00,cca600' . '&chls=1,1,0|1,6,3' . // chart type is linechart '&cht=lc' . $labeld . '&chxl=0:|' . $this->encodeaxis($axis) . # . $'|1:||top' . '&chxp=0,' . join(',', $axispos) . # '&chxp=0,0.3,0.4' . # '&chm=R,CCCCCC,0,0.25,0.5' . '&chg=' . (2400/(count($datasets[0])-1)) . ',-1,3,3'; // lines return $url; } public function showPie($axis, $datasets) { $url = 'http://chart.apis.google.com/chart?' . // Dimension of graph. Default is 800x350 'chs=' . $this->x . 'x' . $this->y . // Dateset values. '&chd=' . $this->encodedata(array($datasets)) . // chart type is linechart '&cht=p' . '&chl=' . $this->encodeaxis($axis); return $url; } /** * Takes a input value, and generates a value that suits better as a max * value on the Y-axis. In example 37.6 will not make a good max value, instead * it will return 40. It will always return an equal or larger number than it gets * as input. * * Here is some test code: * * $foo = array(0, 2, 2.3, 2.6, 6, 10, 15, 98, 198, 256, 487, 563, 763, 801, 899, 999, 987, 198234.485, 283746); * foreach ($foo AS $f) { * echo '

' . $f . ' => ' . sspmod_statistics_Graph_GoogleCharts::roof($f); * } * * * @param $max Input value. */ public static function roof($max) { $mul = 1; if ($max < 1) { return 1; } $t = intval(ceil($max)); while ($t > 100) { $t /= 10; $mul *= 10; } $maxGridLines = 10; $candidates = array(1, 2, 5, 10, 20, 25, 50, 100); foreach ($candidates as $c) { if ($t / $c < $maxGridLines) { $tick_y = $c * $mul; $target_top = intval(ceil($max / $tick_y) * $tick_y); return $target_top; } } } } ?>