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khosb/modules/gchart/classes/GoogleChart.php

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<?php defined('SYSPATH') or die('No direct access allowed.');
/**
* This class provides access to Google's Chart API
*
* @package lnApp
* @subpackage GoogleChart
* @category Helper
* @author Deon George
* @copyright (c) 2010 Deon George
* @license http://dev.leenooks.net/license.html
*/
abstract class GoogleChart implements Iterator,Countable {
// Hold the data for our chart
protected $_data = array();
protected $_axis = array();
private $_plotdata = array();
protected $_max = array();
// Chart title
protected $_title = '';
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protected $_dataurl = '';
protected $_divname = '';
// Default chart size.
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protected $_height = '200';
protected $_width = '700';
// Colors to use for series
private $series_colors = array('AAACCC','E0E0E0','CCC888','EEEBBB','666CCC','888888');
// Implementation Methods
public function count() {
return count($this->_plotdata);
}
public function current() {
return current($this->_plotdata);
}
public function key() {
return key($this->_plotdata);
}
public function next() {
return next($this->_plotdata);
}
public function rewind() {
reset($this->_plotdata);
}
public function valid() {
return key($this->_plotdata) ? TRUE : FALSE;
}
public function __call($name,$args) {
switch ($name) {
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case 'dataurl': $this->_dataurl = array_shift($args);
break;
case 'div': $this->_divname = array_shift($args);
break;
case 'height': $this->_height = array_shift($args);
break;
case 'title': $this->_title = array_shift($args);
break;
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case 'width': $this->_width = array_shift($args);
break;
default:
throw new Kohana_Exception('Unknown method :name',array(':name'=>$name));
}
return $this;
}
/**
* Render the URL that generates the graph
*/
final public function __toString() {
try {
return (string)$this->render();
} catch (Exception $e) {
echo Debug::vars($e);
}
}
/**
* Pick the driver that will render the graph
* @param $class The child class to invoke
*/
final public static function factory($class) {
$c = sprintf('%s_%s',get_called_class(),$class);
if (! class_exists($c))
throw new Kohana_Exception('Unknown Google Chart Type :class',array(':class'=>$class));
else
return new $c();
}
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// Render the chart data in a json format
abstract public function json();
// Our child class should define how to render as a string
abstract public function render();
/**
* Record one series of data
* @param $axis Axis used and legend title, eg: (yr->"Right Y",yl->"Left Y")
* @param $data Data for Axis in the format ("x label"=>value);
*
* Example:
* $this->data('yl'=>'Base Down Peak',array('11-12'=>1,'11-11'=>2));
*/
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public function sdata(array $axis,array $data) {
// Some sanity checking
if (count($axis) != 1)
throw new Kohana_Exception('We can only take 1 series at time.');
// This should only iterate once
foreach ($axis as $key => $l) {
if (! in_array($key,array('yr','yl')))
throw new Kohaan_Exception('Unknown AXIS :axis',array(':axis'=>$key));
$this->_axis[$l] = $key;
$this->_data[$l] = $data[$l];
// Upate our plot data
foreach ($data[$l] as $k=>$v)
$this->_plotdata[$k][$l] = $v;
ksort($this->_plotdata);
$this->_max[$l] = max($data[$l]);
}
return $this;
}
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/**
* Record on plot event
* @param $data Should contain an "X" with a "YL" and/or "YR"
*/
public function pdata($x,array $data) {
if (! is_string($x))
throw new Kohana_Exception('X should be a string');
foreach ($data as $key => $values) {
switch ($key) {
case 'yr':
case 'yl':
foreach ($values as $k=>$v) {
if (! in_array($k,$this->_axis))
$this->_axis[$k] = $key;
$this->_data[$k][$x] = $v;
$this->_plotdata[$x][$k] = $v;
}
break;
default:
throw new Kohana_Exception('Unknown key :key',array(':key'=>$key));
}
}
}
/**
* Return the colors that will be used for this series
*/
protected function seriescolors() {
return array_slice($this->series_colors,0,count($this->_axis));
}
/**
* Render the chart data in a table format
*/
public function table($vertical=TRUE,$class=array()) {
if (! $this->_data)
return sprintf('<table><tr><td>%s</td></tr></table>',_('No Data'));
$output = sprintf('<table %s>',
isset($class['table']) ? $class['table'] : 'class="google-data-table"');
if ($vertical) {
$output .= '<tr>';
$output .= '<td>&nbsp;</td>';
foreach ($this->_axis as $l => $axis)
$output .= sprintf('<th style="text-align: right;">%s</th>',$l);
$output .= '</tr>';
foreach ($this as $k => $details) {
$output .= '<tr>';
$output .= sprintf('<th style="text-align: right;">%s</th>',$k);
foreach ($this->_axis as $l => $axis)
$output .= sprintf('<td style="text-align: right;">%s</td>',$details[$l]);
$output .= '</tr>';
}
// Horizontal table
} else {
$output .= '<tr>';
$output .= '<td>&nbsp;</td>';
foreach ($this as $k => $details)
$output .= sprintf('<th style="text-align: right;">%s</th>',$k);
$output .= '</tr>';
foreach ($this->_axis as $l => $axis) {
$output .= '<tr>';
$output .= sprintf('<th style="text-align: right;">%s</th>',$l);
foreach ($this as $k => $v)
$output .= sprintf('<td style="text-align: right;">%s</td>',$v[$l]);
$output .= '</tr>';
}
}
$output .= '</table>';
return $output;
}
}
?>