Bar chart

GnuPlotBarChart.php

@@ -0,0 +1,139 @@
+<?php
+
+require_once './GnuPlot.php';
+
+class GnuPlotBarChart extends \Gregwar\GnuPlot\GnuPlot{
+
+    /**
+     * Data groups
+     */
+    protected $groups = array();
+
+    protected $dataLabels = array();
+
+    protected $colors = array('#A61E22', '#4193D2', '#CBAC1E', '#C4BDAB', '#6E6956');
+
+    public function __construct() {
+        parent::__construct();
+    }
+
+    public function __destruct() {
+        parent::__destruct();
+    }
+
+    /**
+     * Push a new $value to exact $group, $group is a int id of group , $value is a 
+     * number
+     */
+    public function push($group, $value, $index = null){
+        $this->values[$group][] = $value;
+
+        return $this->values;
+    }
+
+    /**
+     * Push a new $group, $group is a String name of group.
+     * 
+     * Returns Int - group ID
+     */
+    public function pushGroup($group){
+        $this->groups[] = $group;
+
+        end($this->groups);
+        return key($this->groups);
+    }
+
+    /**
+     * Push a new $color for corresponding $group
+     */
+    public function setColor($group, $color){
+        $this->colors[$group] = $color;
+    }
+
+    /**
+     * Push a $label of corresponding group
+     */
+    public function pushLabel($label){
+        $this->dataLabels[] = $label;
+
+        return $this;
+    }
+
+    public function get(){
+        $this->sendInit();
+        $this->sendCommand('set terminal png size '.$this->width.','.$this->height);
+        fflush($this->stdout);
+        $this->plot();
+
+        // 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);
+
+        return $result;
+    }
+
+    public function plot($pieChart = false, $replot = false) {
+        if ($replot) {
+            $this->sendCommand('replot');
+        } else {
+            $this->sendCommand('plot '.$this->getUsings());
+        }
+        $this->plotted = true;
+
+        $this->sendData();
+    }
+
+    protected function getUsings($pieChart = false) {
+        $n = count($this->groups);
+        if(!$n)
+            return false;
+
+        $usings = array();
+
+        for($i = 0; $i < $n; $i++){
+            $color = isset($this->colors[$i]) ? 'linecolor rgb "'.$this->colors[$i].'"' : "";
+            $usings[] = "'-' u 2:xtic(1) ti col ".$color;
+        }
+
+        return implode(', ', $usings);
+    }
+
+    protected function sendData() {
+        foreach ($this->groups as $groupID => $groupName) 
+        {
+            $this->sendCommand('"'.$groupName.'"');
+            foreach ($this->values[$groupID] as $valueID => $value) {
+                $this->sendCommand('"'.$this->dataLabels[$valueID].'";'.$value);
+            }
+            $this->sendCommand('e');
+        }
+    }
+
+    protected function sendInit(){
+        if(!sizeof($this->values))
+            return false;
+
+        $this->sendCommand('reset');
+
+        if ($this->title) {
+            $this->sendCommand('set title "'.$this->title.'"');
+        }
+
+        $this->sendCommand('set auto x');
+        $this->sendCommand("set yrange [0:]");
+        $this->sendCommand('set style data histogram');
+        $this->sendCommand('set style histogram cluster gap 1');
+        $this->sendCommand('set style fill solid border rgb "#333333"');
+        $this->sendCommand('set border lw 2 lc rgb "#333333"');
+        $this->sendCommand('set boxwidth 0.9');
+        $this->sendCommand('set xtic scale 0 font ",12"');
+        $this->sendCommand('set datafile separator ";"');
+    }
+}

README.md

@@ -85,6 +85,33 @@ run `realTime.php` for example:
 $plot->refresh();
 ```
 
+GnuPlot BarChart USAGE
+=======
+
+```php
+require_once './GnuPlotBarChart.php';
+
+$plot = new GnuPlotBarChart;
+$plot->setWidth(500);
+$plot->setHeight(500);
+$plot->setGraphTitle("Exmple bar chart");
+
+$g1 = $plot->pushGroup('Income');
+$plot->push($g1, 2);
+$plot->push($g1, 1);
+
+$g2 = $plot->pushGroup('Sale');
+$plot->push($g2, 7);
+$plot->push($g2, 4);
+
+
+$plot->pushLabel("2013");
+$plot->pushLabel("2014");
+
+header('Content-type: image/png');
+echo $plot->get();
+```
+
 API
 ===
 
@@ -109,4 +136,4 @@ License
 =======
 
 `Gregwar\GnuPlot` is under MIT license
-
+`GnuPlotBarChart` is under MIT license