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Pie chart #2

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Pie chart #2

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e596117
Test
likee Dec 1, 2014
76c3478
PieChart
Dec 1, 2014
ad07462
Update README.md
likee Dec 1, 2014
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271 changes: 267 additions & 4 deletions GnuPlot.php
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -6,6 +6,9 @@ class GnuPlot
{
// Values as an array
protected $values = array();

// Values as an array
protected $pieValues = array();

// Time format if X data is time
protected $timeFormat = null;
Expand Down Expand Up @@ -47,6 +50,33 @@ class GnuPlot
protected $process;
protected $stdin;
protected $stdout;

// Pie chart scale
protected $pieScale = 0.25;

// Pie chart position on paper
protected $piePosition = 0.5;

// Pie chart a
protected $pieS = 0.05;

// Pie Chart colors
protected $colors = array('#585C00', '#750400', '#A2A811', '#2474B5', '#F5140C');

// Pie Chart label row height
protected $labelRowHeight = 40;

// Pie Chart label font size
protected $labelFontSize = 16;

// Pie Chart font location
protected $font = ""; //img/fonts/TahomaRegular.ttf

// Pie Chart font color
protected $fontColor = "#333333";

// Pie Chart legend color
protected $legendColor = "#ffffff";

public function __construct()
{
Expand All @@ -57,6 +87,8 @@ public function __construct()
public function __destruct()
{
$this->sendCommand('quit');
fclose($this->stdin);
fclose($this->stdout);
proc_close($this->process);
}

Expand Down Expand Up @@ -192,14 +224,23 @@ protected function sendInit()
/**
* Runs the plot to the given pipe
*/
public function plot($replot = false)
public function plot($pieChart = false, $replot = false)
{
if ($replot) {
$this->sendCommand('replot');
} else {
$this->sendCommand('plot '.$this->getUsings());
if(!$pieChart){
$this->sendCommand('plot '.$this->getUsings());
}
}
$this->plotted = true;

if($pieChart){
$this->sendPieData();
$this->sendCommand('plot '.$this->getUsings($pieChart));
return ;
}

$this->sendData();
}

Expand Down Expand Up @@ -238,6 +279,11 @@ public function get()
return $result;
}


// private function readStream(){
//
// }

/**
* Display the plot
*/
Expand Down Expand Up @@ -312,8 +358,12 @@ public function enableHistogram()
/**
* Gets the "using" line
*/
protected function getUsings()
protected function getUsings($pieChart = false)
{
if($pieChart){
return "2";
}

$usings = array();

for ($i=0; $i<count($this->values); $i++) {
Expand Down Expand Up @@ -371,4 +421,217 @@ protected function openPipe()
$this->stdin = $pipes[0];
$this->stdout = $pipes[1];
}
}

/**
* Sets the pie chart label font size
*/
public function setPieLabelFontSize($labelFontSize){
$this->labelFontSize = $labelFontSize;

return $this;
}

/**
* Sets label of the pie chart data. If index is null it sets last
* inserted data title else it sets title for specified $index data;
*/
public function setPieLabel($title, $index = null){
if(!$index){
$this->titles[] = $title;
return $this;
}

$this->titles[$index] = $title;
return $this;
}

/**
* Sets pie chart scale
*/
public function setPieScale($pieScale){
$this->pieScale = $pieScale;

return $this;
}

/**
* Sets pie chart scale
*/
public function setFontColor($fontColor){
$this->fontColor = $fontColor;

return $this;
}

/**
* Sets pie chart scale
*/
public function setLegendColor($legendColor){
$this->legendColor = $legendColor;

return $this;
}

/**
* Push a new data for pie chart. $value is a float number betwean 0 and 1.
*/
public function pushPie($value, $index = null){
if(!$index){
$this->pieValues[] = $value;
return $this;
}

$this->pieValues[$index] = $value;
return $this;
}


/**
* Sends all the command to the given pipe to give it the
* current data
*/
protected function sendPieData()
{
$lVal = 0;
$cVal = 0;
foreach ($this->values as $index => $value)
{
$cVal = $lVal + $value*360;
if($index == (sizeof($this->values) - 1 ))
$cVal = 360;

$this->sendCommand('set obj ' . ($index+1) . ' circle arc [' . $lVal . ':' . $cVal . '] fc rgb "' . $this->colors[$index] . '" ');
$this->sendCommand('set obj ' . ($index+1) . ' circle at screen ' . $this->piePosition . ',' . $this->piePosition . ' size screen ' . $this->pieScale . ' front');

$lVal = $cVal;
}
$this->sendCommand('e');
}

/**
* Prepares pie chart data to send
*/
protected function preparePieData(){
$sum = 0;
$n = sizeof($this->pieValues);

for($i = 0; $i < $n; $i++){
$sum += $this->pieValues[$i];
}

foreach ($this->pieValues as $key => $value){
$this->values[$key] = ($value/$sum);
}
}

protected function sendPieInit(){
if(!sizeof($this->values))
return false;

if ($this->title) {
$this->sendCommand('set title "'.$this->title.'"');
}

$this->sendCommand('reset');
$this->sendCommand('unset border');
$this->sendCommand('unset tics');
$this->sendCommand('unset key');
$this->sendCommand('set angles degree');
$this->sendCommand('set yrange [0:1]');
$this->sendCommand('set style fill solid 1.0 border -2');
}

/**
* Write the current plot to a file
*/
public function getPieChart()
{
$this->preparePieData();
$this->sendPieInit();
$this->sendCommand('set terminal png size '.$this->width.','.$this->height);
fflush($this->stdout);
$this->plot(true);

// Reading data, timeout=100ms
$result = '';
$timeout = 100;
do {
stream_set_blocking($this->stdout, false);
$data = fread($this->stdout, 128);
$result .= $data;
usleep(5000);
$timeout -= 5;
} while ($timeout>0 || $data);

$imgChart = imagecreatefromstring($result);
$imgLabel = $this->getLabelImg();

$hheight = imagesy($imgLabel);

imagecopy($imgLabel, $imgChart, 0, 0, 0, 0, $this->width, $hheight);

$this->drawLabels($imgLabel);

return imagepng($imgLabel);
}

protected function getLabelImg(){
$height = $this->height + sizeof($this->titles) * $this->labelRowHeight;

$image = imagecreatetruecolor($this->width, $height);
$white = imagecolorallocatealpha($image, 255, 255, 255, 127);
imagefill($image, 0, 0, $white);
return $image;
}

protected function drawLabels($image){
$rgb = $this->hexToRGB($this->fontColor);
$fontColor = imagecolorallocate($image, $rgb['r'], $rgb['g'], $rgb['b']);

$rgb = $this->hexToRGB($this->legendColor);
$legendColor = imagecolorallocate($image, $rgb['r'], $rgb['g'], $rgb['b']);

$x1 = 20;
$x2 = 40;
$labelX = 10;

imagefilledrectangle($image, $labelX, $this->height-$labelX, $this->width - $labelX, imagesy($image)-3, $legendColor);

foreach ($this->titles as $key => $value) {
$rgb = $this->hexToRGB($this->colors[$key]);
$color = imagecolorallocate($image, $rgb['r'], $rgb['g'], $rgb['b']);

$y = $this->height + $key * $this->labelRowHeight;
$y2 = $y + 30;

$value .= ' ' . round($this->values[$key]*100, 2) . '%';

if($this->font){
imagettftext($image, $this->labelFontSize, 0, $x2+8, $y2-7, $fontColor, $this->font, $value);
} else {
imagestring($image, $this->labelFontSize, $x2+8, $y+8, $value, $fontColor);
}

imagefilledrectangle($image, $x1, $y, $x2, $y2, $color);
}
}

protected function hexToRGB ($hexColor){
if( preg_match( '/^#?([a-h0-9]{2})([a-h0-9]{2})([a-h0-9]{2})$/i', $hexColor, $matches ) )
{
return array(
'r' => hexdec( $matches[ 1 ] ),
'g' => hexdec( $matches[ 2 ] ),
'b' => hexdec( $matches[ 3 ] )
);
}
else
{
return array(
'r' => 0,
'g' => 0,
'b' => 0
);
}
}
}
20 changes: 20 additions & 0 deletions README.md
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -85,6 +85,24 @@ run `realTime.php` for example:
$plot->refresh();
```

PIE CHART USAGE
===
```php
<?php
$plot = new GnuPlot;

$plot->setHeight(400);
$plot->setWidth(400);

$plot->pushPie(50)->setPieLabel('1950');
$plot->pushPie(100)->setPieLabel('2000');
$plot->pushPie(150)->setPieLabel('2050');

header('Content-type: image/png');
echo $plot->getPieChart();
```


API
===

Expand All @@ -105,6 +123,8 @@ API
* `setHeight($height)`, sets the width of the graph
* `addLabel($x, $y, $text)`, add some label at a point



License
=======

Expand Down