public function plot($file)
{
$yaxis = new Graph_DefaultAxis($this->getMinData(), $this->getMaxData());
$img = ImageCreate($this->getWidth(), $this->getHeight());
$background = ImageColorAllocate($img, 255, 255, 255);
$axiscolor = ImageColorAllocate($img, 0, 0, 0);
// Y-Axis
$posYaxis = 0;
$lastYpixel_label = null;
$lastYpixel_line = null;
while ($yaxis->getLabelPosition($posYaxis) < 1 && $posYaxis < 30) {
$labelPosition = $yaxis->getLabelPosition($posYaxis);
$label = $yaxis->getLabel($labelPosition);
$yPixel = $labelPosition * $this->getPlotHeight();
$y = $this->getPlotYOffset() + ($this->getPlotHeight() - $yPixel);
$preXpixel = ImageFontWidth($this->getAxisFont()) * strlen($label);
$preYpixel = ImageFontHeight($this->getAxisFont()) / 2;
$postYpixel = ImageFontHeight($this->getAxisFont()) / 2;
if ($lastYpixel_label == null || $lastYpixel_label + 20 < $yPixel - $preYpixel) {
ImageString($img, $this->getAxisFont(), $this->getPlotYAxisPosition() - $preXpixel, $y - $preYpixel, iconv("UTF8", "ISO-8859-1", $label), $axiscolor);
$lastYpixel_label = $yPixel + $postYpixel;
}
if ($lastYpixel_line == null || $lastYpixel_line + 20 < $yPixel) {
ImageLine($img, $this->getPlotXOffset(), $y, $this->getPlotXOffset() + $this->getPlotWidth(), $y, $axiscolor);
$lastYpixel_line = $yPixel;
}
$posYaxis++;
}
// Data
$lastXpixel_label = null;
$y_null = $this->getPlotHeight() - $this->getPlotHeight() * $yaxis->getPosition(0);
for ($i = 0; $i < $this->getDataCount(); $i++) {
$dataColor = $this->getDataColor($i)->gdAllocate($img);
$x = $this->getDataXPosition($i);
$y = $this->getPlotHeight() - $this->getPlotHeight() * $yaxis->getPosition($this->getDataValue($i));
for ($x_bar = $x - floor($this->getBarWidth() / 2); $x_bar <= $x + $this->getBarWidth() / 2; $x_bar++) {
ImageLine($img, $x_bar, $y, $x_bar, $y_null, $dataColor);
}
// Draw Axis
$label = $this->getDataLegend($i);
$preXpixel = ImageFontWidth($this->getAxisFont()) * strlen($label) / 2;
$postXpixel = ImageFontWidth($this->getAxisFont()) * strlen($label) / 2;
if ($lastXpixel_label == null || $lastXpixel_label + 20 < $x - $preXpixel) {
ImageString($img, $this->getAxisFont(), $x - $preXpixel, $this->getPlotXAxisPosition(), iconv("UTF8", "ISO-8859-1", $label), $axiscolor);
$lastXpixel_label = $x + $postXpixel;
}
}
// Output
if ($file != null) {
$file->setMimeType("image/png");
if (substr($file->getExportFilename(), 0, -4) != ".png") {
$file->setExportFilename($file->getExportFilename() . ".png");
}
$file->save();
ImagePNG($img, $file->getAbsoluteFileName());
} else {
header("Content-Type: image/png");
ImagePNG($img);
}
}
public function __construct($min, $max, $dateFormat, $timeMulti)
{
parent::__construct($min, $max, $timeMulti);
$this->dateFormat = $dateFormat;
}
