/**
* This function creates the graph and either sends it to the browser
* of saves it to a file.
*
* @param $file (optional) If specified, the graph will be saved to
* the indicated file. If left as default, the graph
* will be outputted to the browser.
*/
function plot($file = '')
{
// margins
$margin = $this->m_margin;
$marginy = $margin;
$marginx = $margin + 5;
if ($this->m_title) {
$marginy += $this->m_fontHeight * 1.5;
}
$marginbottom = $margin + 5;
$height = $this->m_height - $marginy - $marginbottom;
$width = $this->m_width - $marginx - $margin;
imagefilledrectangle($this->m_image, $marginx, $marginy, $marginx + $width, $marginy + $height, $this->m_fillColor);
// plot title
if ($this->m_title) {
imagestring($this->m_image, $this->m_font, ($this->m_width - strlen($this->m_title) * $this->m_fontWidth) / 2, $margin, $this->m_title, $this->m_textColor);
}
YDGraph::_set_style($this->m_image, SOLID, $this->m_strokeColor, $this->m_fillColor);
$sum = array_sum($this->m_values);
$colors = array('#CC3232', '#70DBDB', '#66CD00', '#FF4040', '#8A2BE2', '#5F9F9F', '#EED2EE', '#E9967A', '#6666FF', '#A2C257', '#EEB4B4', '#8F5E99', '#EEC900', '#EE799F', '#B2DFEE', '#70DB93', '#F4A460', '#AAAAFF', '#CC3232', '#70DBDB', '#66CD00', '#FF4040', '#8A2BE2', '#5F9F9F', '#EED2EE', '#E9967A', '#6666FF', '#A2C257', '#EEB4B4', '#8F5E99', '#EEC900', '#EE799F', '#B2DFEE', '#70DB93', '#F4A460', '#AAAAFF');
// pieces
$degrees = array();
for ($i = 0; $i < count($this->m_values); $i++) {
$value = $this->m_values[$i] / $sum * 360;
if ($value > 0 && floor($value / 360 * 100) > 0) {
$degrees[$i] = $value;
}
}
// sizes
$diamx = $width / 2;
$diamy = $height;
if ($diamx > $diamy) {
$diam = $diamy;
} else {
$diam = $diamx;
}
$radius = $diam / 2;
$x = $marginx + $radius;
$y = $marginy + $radius;
imagearc($this->m_image, $x, $y, $diam, $diam, 0, 360, $this->m_strokeColor);
// lines
$last_angle = 0;
foreach ($degrees as $i => $deg) {
$last_angle = $last_angle + $deg;
$end_x = floor($x + $radius * cos($last_angle * pi() / 180));
$end_y = floor($y + $radius * sin($last_angle * pi() / 180));
imageline($this->m_image, $x, $y, $end_x, $end_y, $this->m_strokeColor);
}
// colors
$last_angle = 0;
$pointer = 0;
$max_len = 0;
foreach ($degrees as $i => $deg) {
$pointer = $last_angle + $deg;
$this_angle = ($last_angle + $pointer) / 2;
$last_angle = $pointer;
$end_x = floor($x + $radius * cos($this_angle * pi() / 180));
$end_y = floor($y + $radius * sin($this_angle * pi() / 180));
$mid_x = floor(($x + $end_x) / 2);
$mid_y = floor(($y + $end_y) / 2);
$hex_split = YDGraph::_decode_color($colors[$i]);
if (isset($this->m_colors[$i])) {
$hex_split = YDGraph::_decode_color($this->m_colors[$i]);
}
$piece_color = imagecolorallocate($this->m_image, $hex_split[0], $hex_split[1], $hex_split[2]);
imagefilltoborder($this->m_image, $mid_x, $mid_y, $this->m_strokeColor, $piece_color);
$percent = number_format($deg / 360 * 100, $this->m_numberOfDecimals, $this->m_decimalSeparator, $this->m_thousandsSeparator);
$max_len = strlen($percent) > $max_len ? strlen($percent) : $max_len;
}
// labels
$last_position = $marginy;
foreach ($degrees as $i => $deg) {
$percent = number_format($deg / 360 * 100, $this->m_numberOfDecimals, $this->m_decimalSeparator, $this->m_thousandsSeparator);
$align = 0;
switch ($this->m_labelsFont) {
case 1:
$align = 1;
break;
case 2:
$align = -1;
break;
case 3:
case 4:
$align = -2;
break;
case 5:
case 6:
case 7:
case 8:
$align = -3;
break;
}
if ($this->m_labelsFontHeight + 3 >= 15) {
$last_position += $this->m_labelsFontHeight + 3;
} else {
$last_position += 15;
}
$hex_split = YDGraph::_decode_color($colors[$i]);
if (isset($this->m_colors[$i])) {
$hex_split = YDGraph::_decode_color($this->m_colors[$i]);
}
$piece_color = imagecolorallocate($this->m_image, $hex_split[0], $hex_split[1], $hex_split[2]);
$w = $x + $radius;
$h = $last_position;
imagefilledrectangle($this->m_image, $w + 20, $h, $w + 30, $h + 10, $piece_color);
imagestring($this->m_image, $this->m_labelsFont, $w + 40, $h + $align, str_repeat(' ', $max_len - strlen($percent)) . $percent . "% " . $this->m_labels[$i], $this->m_labelsTextColor);
}
if ($this->m_showtotal) {
if (isset($this->m_total)) {
$sum = $this->m_total;
}
if ($this->m_formattotal) {
$sum = number_format($sum, $this->m_numberOfDecimals, $this->m_decimalSeparator, $this->m_thousandsSeparator);
}
imagestring($this->m_image, $this->m_labelsFont, $w + 20, $h + 20, $this->m_totalstring . $sum, $this->m_labelsTextColor);
}
if (strlen($file) > 0) {
switch (YDConfig::get('YD_GRAPH_TYPE')) {
case IMG_GIF:
imagegif($this->m_image, $file);
break;
case IMG_JPG:
case IMG_JPEG:
imagejpeg($this->m_image, $file);
break;
default:
imagepng($this->m_image, $file);
break;
}
} else {
switch (YDConfig::get('YD_GRAPH_TYPE')) {
case IMG_GIF:
header('Content-type: image/gif');
imagegif($this->m_image);
break;
case IMG_JPG:
case IMG_JPEG:
header('Content-type: image/jpeg');
imagejpeg($this->m_image);
break;
default:
header('Content-type: image/png');
imagepng($this->m_image);
break;
}
}
}
