width = (int) $width;
$this->height = (int) $height;
}
public function setTitle($title)
{
$this->title = $title;
return true;
}
public function toggleLegend()
{
$this->legend = !$this->legend;
}
public function setLabels($labels)
{
$this->labels = $labels;
return true;
}
public function add(SVGPlot_Data $data)
{
$this->data[] = $data;
return true;
}
public function display()
{
header('Content-Type: image/svg+xml');
echo $this->output();
}
public function output()
{
$out = '' . PHP_EOL;
$out.= '' . PHP_EOL;
$out.= '';
return $out;
}
protected function _renderLinegraph()
{
$out = '';
if (empty($this->data))
{
return $out;
}
// Figure out the maximum Y-axis value
$max_value = 0;
$nb_elements = 0;
foreach ($this->data as $row)
{
if ($max_value == 0)
{
$nb_elements = count($row->get());
}
$max = max($row->get());
if ($max > $max_value)
{
$max_value = $max;
}
}
if ($nb_elements < 1)
{
return $out;
}
$divide = round($max_value / ($this->height * 0.8), 2) ?: 1;
$y_axis_val = ceil(abs($max_value) / ($this->height * 0.8)) * 50;
$space = round(($this->width - ($this->width * 0.1)) / $nb_elements, 2);
for ($i = 0; $i < 10; $i++)
{
if (($y_axis_val * $i) <= $max_value)
{
$line_y = ($this->height * 0.93) - (($y_axis_val / $divide) * $i);
$out .= '' . PHP_EOL;
$out .= ''.($y_axis_val * $i).'' . PHP_EOL;
}
}
// X-axis lines
$y = $this->height - ($this->height * 0.07);
$x = $this->width * 0.1;
$i = 0;
foreach ($this->data[0]->get() as $k=>$v)
{
if ($x >= $this->width)
break;
$out .= '' . PHP_EOL;
$x += $space + $this->data[0]->width;
}
// labels for x axis
$y = $this->height - ($this->height * 0.07);
$i = 0;
$step = round($nb_elements / 5);
for ($i = 0; $i <= $nb_elements; $i += $step)
{
//echo
$x = ($i * ($space + $this->data[0]->width)) + ($this->width * 0.1);
if ($x >= $this->width)
break;
if (isset($this->labels[$i]))
{
$out .= ''
. ($this->labels[$i]).'' . PHP_EOL;
}
}
$y = ($this->height * 0.1);
$w = $this->width - ($this->width * 0.1);
$h = $this->height - ($this->height * 0.17);
foreach ($this->data as $row)
{
$out .= '' . PHP_EOL;
}
return $out;
}
}
class SVGPlot_Data
{
public $color = 'blue';
public $width = '10';
public $title = null;
protected $data = array();
public function __construct($data)
{
if (is_array($data))
$this->data = $data;
elseif (!is_object($data))
$this->append($data);
}
public function append($data)
{
$this->data[] = $data;
return true;
}
public function get()
{
return $this->data;
}
}
?>