diff --git a/libraries/chart.lib.php b/libraries/chart.lib.php
index b8213f2ad..1dfaf575c 100644
--- a/libraries/chart.lib.php
+++ b/libraries/chart.lib.php
@@ -1,5 +1,13 @@
 <?php
+/**
+ * Chart functions used to generate various types of charts.
+ * @author Martynas Mickevicius <mmartynas@gmail.com>
+ * @package phpMyAdmin
+ */
 
+/**
+ * 
+ */
 define('ERR_NO_GD', 0);
 define('ERR_NO_JSON', 1);
 
@@ -13,15 +21,9 @@ require_once './libraries/chart/pma_pchart_single_radar.php';
 require_once './libraries/chart/pma_pchart_multi_radar.php';
 
 /**
- * Chart functions used to generate various types
- * of charts.
- *
- * @version $Id$
- * @package phpMyAdmin
- */
-
-/*
- * Formats a chart for status page.
+ * Formats a chart for the status page.
+ * @param array $data data for the status chart
+ * @return string HTML and JS code for the chart
  */
 function PMA_chart_status($data)
 {
@@ -42,8 +44,10 @@ function PMA_chart_status($data)
     echo $chartCode;
 }
 
-/*
- * Formats a chart for profiling page.
+/**
+ * Formats a chart for the profiling page.
+ * @param array $data data for the status chart
+ * @return string HTML and JS code for the chart
  */
 function PMA_chart_profiling($data)
 {
@@ -63,8 +67,11 @@ function PMA_chart_profiling($data)
     echo $chartCode;
 }
 
-/*
- * Formats a chart for query results page.
+/**
+ * Formats a chart for the query results page.
+ * @param array $data data for the status chart
+ * @param array $chartSettings settings used to generate the chart
+ * @return string HTML and JS code for the chart
  */
 function PMA_chart_results($data, &$chartSettings)
 {
@@ -232,8 +239,9 @@ function PMA_chart_results($data, &$chartSettings)
     return $chartCode;
 }
 
-/*
+/**
  * Simple handler of chart errors.
+ * @param array $errors all occured errors
  */
 function PMA_handle_chart_err($errors)
 {
diff --git a/libraries/chart/pma_chart.php b/libraries/chart/pma_chart.php
index 232a98e05..f70837f39 100644
--- a/libraries/chart/pma_chart.php
+++ b/libraries/chart/pma_chart.php
@@ -1,29 +1,37 @@
 <?php
+/**
+ * Holds the base class that all charts inherit from and some widely used
+ * constants.
+ * @author Martynas Mickevicius <mmartynas@gmail.com>
+ * @package phpMyAdmin
+ */
 
+/**
+ *
+ */
 define('RED', 0);
 define('GREEN', 1);
 define('BLUE', 2);
 
-class PMA_Chart
+/**
+ * The base class that all charts inherit from.
+ * @abstract
+ * @package phpMyAdmin
+ */
+abstract class PMA_chart
 {
-    /*
-     * The settings array. All the default values are here.
+    /**
+     * @var array   All the default settigs values are here.
      */
     protected $settings = array(
 
-        /*
-         * Default title for every chart.
-         */
+        // Default title for every chart.
         'titleText' => 'Chart',
 
-        /*
-        * The style of the chart title.
-        */
-        'titleStyle' => 'font-size: 12px; font-weight: bold;',
+        // The style of the chart title.
+        'titleColor' => '#FAFAFA',
 
-        /*
-         * Colors for the different slices in the pie chart.
-         */
+        // Colors for the different slices in the pie chart.
         'colors' => array(
             '#BCE02E',
             '#E0642E',
@@ -45,53 +53,50 @@ class PMA_Chart
             '#87C9BF',
         ),
 
-        /*
-         * Chart background color.
-         */
+        // Chart background color.
         'bgColor' => '#84AD83',
 
-        /*
-         * The width of the chart.
-         */
+        // The width of the chart.
         'width' => 520,
 
-         /*
-         * The height of the chart.
-         */
+         // The height of the chart.
         'height' => 325,
 
-        /*
-         * Default X Axis label. If empty, label will be taken from the data.
-         */
+        // Default X Axis label. If empty, label will be taken from the data.
         'xLabel' => '',
 
-        /*
-         * Default Y Axis label. If empty, label will be taken from the data.
-         */
+        // Default Y Axis label. If empty, label will be taken from the data.
         'yLabel' => '',
     );
 
-    /*
-     * Options that the user has specified
+    /**
+     * @var array   Options that the user has specified
      */
     private $userSpecifiedSettings = null;
 
-    /*
-     * Error codes will be stored here
+    /**
+     * @var array   Error codes will be stored here
      */
     protected $errors = array();
 
+    /**
+     * Store user specified options
+     * @param array $options users specified options
+     */
     function __construct($options = null)
     {
         $this->userSpecifiedSettings = $options;
     }
 
+    /**
+     * All the variable initialization has to be done here.
+     */
     protected function init()
     {
         $this->handleOptions();
     }
 
-    /*
+    /**
      * A function which handles passed parameters. Useful if desired
      * chart needs to be a little bit different from the default one.
      */
@@ -109,9 +114,9 @@ class PMA_Chart
         return $this->settings['titleText'];
     }
 
-    protected function getTitleStyle()
+    protected function getTitleColor($component)
     {
-        return $this->settings['titleStyle'];
+        return $this->hexStrToDecComp($this->settings['titleColor'], $component);
     }
 
     protected function getColors()
@@ -131,7 +136,7 @@ class PMA_Chart
 
     protected function getBgColor($component)
     {
-        return hexdec(substr($this->settings['bgColor'], ($component * 2) + 1, 2));
+        return $this->hexStrToDecComp($this->settings['bgColor'], $component);
     }
 
     protected function setXLabel($label)
@@ -163,6 +168,16 @@ class PMA_Chart
     {
         return $this->errors;
     }
+
+    /**
+     * Get one the dec color component from the hex color string
+     * @param string $colorString   color string, i.e. #5F22A99
+     * @param int    $component     color component to get, i.e. 0 gets red.
+     */
+    protected function hexStrToDecComp($colorString, $component)
+    {
+        return hexdec(substr($colorString, ($component * 2) + 1, 2));
+    }
 }
 
 ?>
diff --git a/libraries/chart/pma_pchart_chart.php b/libraries/chart/pma_pchart_chart.php
index bcca2ac28..3e8997030 100644
--- a/libraries/chart/pma_pchart_chart.php
+++ b/libraries/chart/pma_pchart_chart.php
@@ -1,5 +1,14 @@
 <?php
+/**
+ * Holds the base class that all charts using pChart inherit from and some
+ * widely used constants
+ * @author Martynas Mickevicius <mmartynas@gmail.com>
+ * @package phpMyAdmin
+ */
 
+/**
+ * 
+ */
 define('TOP', 0);
 define('RIGHT', 1);
 define('BOTTOM', 2);
@@ -10,17 +19,36 @@ require_once 'pma_chart.php';
 require_once 'pChart/pData.class';
 require_once 'pChart/pChart.class';
 
-/*
+/**
  * Base class for every chart implemented using pChart.
+ * @abstract
+ * @package phpMyAdmin
  */
-abstract class PMA_pChart_Chart extends PMA_Chart
+abstract class PMA_pChart_chart extends PMA_chart
 {
+    /**
+     * @var String  title text
+     */
     protected $titleText;
+
+    /**
+     * @var array   data for the chart
+     */
     protected $data;
 
+    /**
+     * @var object  pData object that holds the description of the data
+     */
     protected $dataSet;
+
+    /**
+     * @var object  pChart object that holds the chart
+     */
     protected $chart;
 
+    /**
+     * @var array   holds base64 encoded chart image parts
+     */
     protected $partsEncoded = array();
 
     public function __construct($data, $options = null)
@@ -41,6 +69,21 @@ abstract class PMA_pChart_Chart extends PMA_Chart
 
         // as in CSS (top, right, bottom, left)
         $this->setAreaMargins(array(20, 20, 40, 60));
+
+        // when graph area gradient is used, this is the color of the graph
+        // area border
+        $this->settings['graphAreaColor'] = '#D5D9DD';
+
+        // the background color of the graph area
+        $this->settings['graphAreaGradientColor'] = '#A3CBA7';
+
+        // the color of the grid lines in the graph area
+        $this->settings['gridColor'] = '#E6E6E6';
+
+        // the color of the scale and the labels
+        $this->settings['scaleColor'] = '#D5D9DD';
+
+        $this->settings['titleBgColor'] = '#000000';
     }
 
     protected function init()
@@ -54,6 +97,7 @@ abstract class PMA_pChart_Chart extends PMA_Chart
         $this->dataSet = new pData;
 
         $this->chart->reportWarnings('GD');
+        $this->chart->ErrorFontName = $this->getFontPath().'tahoma.ttf';
 
         // initialize colors
         foreach ($this->getColors() as $key => $color) {
@@ -70,14 +114,24 @@ abstract class PMA_pChart_Chart extends PMA_Chart
         $this->chart->setImageMap(true, 'mapid');
     }
 
+    /**
+     * data is put to the $dataSet object according to what type chart is
+     * @abstract
+     */
     abstract protected function prepareDataSet();
 
+    /**
+     * all components of the chart are drawn
+     */
     protected function prepareChart()
     {
         $this->drawBackground();
         $this->drawChart();
     }
 
+    /**
+     * draws the background
+     */
     protected function drawBackground()
     {
         $this->drawCommon();
@@ -86,6 +140,9 @@ abstract class PMA_pChart_Chart extends PMA_Chart
         $this->drawGraphArea();
     }
 
+    /**
+     * draws the part of the background which is common to most of the charts
+     */
     protected function drawCommon()
     {
         $this->chart->drawGraphAreaGradient(
@@ -96,12 +153,34 @@ abstract class PMA_pChart_Chart extends PMA_Chart
         $this->chart->addBorder(2);
     }
 
+    /**
+     * draws the chart title
+     */
     protected function drawTitle()
     {
         // Draw the title
-        $this->chart->drawTextBox(0,0,$this->getWidth(),$this->getLabelHeight(),$this->getTitleText(),0,250,250,250,ALIGN_CENTER,True,0,0,0,30);
+        $this->chart->drawTextBox(
+                0,
+                0,
+                $this->getWidth(),
+                $this->getLabelHeight(),
+                $this->getTitleText(),
+                0,
+                $this->getTitleColor(RED),
+                $this->getTitleColor(GREEN),
+                $this->getTitleColor(BLUE),
+                ALIGN_CENTER,
+                True,
+                $this->getTitleBgColor(RED),
+                $this->getTitleBgColor(GREEN),
+                $this->getTitleBgColor(BLUE),
+                30
+        );
     }
 
+    /**
+     * calculates and sets the dimensions that will be used for the actual graph
+     */
     protected function setGraphAreaDimensions()
     {
         $this->chart->setGraphArea(
@@ -112,17 +191,49 @@ abstract class PMA_pChart_Chart extends PMA_Chart
         );
     }
 
+    /**
+     * draws graph area (the area where all bars, lines, points will be seen)
+     */
     protected function drawGraphArea()
     {
-        $this->chart->drawGraphArea(213,217,221,FALSE);
-        $this->chart->drawScale($this->dataSet->GetData(),$this->dataSet->GetDataDescription(),$this->getScale(),213,217,221,TRUE,0,2,TRUE);
-        $this->chart->drawGraphAreaGradient(163,203,167,50);
-        $this->chart->drawGrid(4,TRUE,230,230,230,20);
+        $this->chart->drawGraphArea(
+                $this->getGraphAreaColor(RED),
+                $this->getGraphAreaColor(GREEN),
+                $this->getGraphAreaColor(BLUE),
+                FALSE
+        );
+        $this->chart->drawScale(
+                $this->dataSet->GetData(),
+                $this->dataSet->GetDataDescription(),
+                $this->getScale(),
+                $this->getScaleColor(RED),
+                $this->getScaleColor(GREEN),
+                $this->getScaleColor(BLUE),
+                TRUE,0,2,TRUE
+        );
+        $this->chart->drawGraphAreaGradient(
+                $this->getGraphAreaGradientColor(RED),
+                $this->getGraphAreaGradientColor(GREEN),
+                $this->getGraphAreaGradientColor(BLUE),
+                50
+        );
+        $this->chart->drawGrid(
+                4,
+                TRUE,
+                $this->getGridColor(RED),
+                $this->getGridColor(GREEN),
+                $this->getGridColor(BLUE),
+                20
+        );
     }
 
+    /**
+     * draws the chart
+     * @abstract
+     */
     protected abstract function drawChart();
 
-    /*
+    /**
      * Renders the chart, base 64 encodes the output and puts it into
      * array partsEncoded.
      *
@@ -169,6 +280,10 @@ abstract class PMA_pChart_Chart extends PMA_Chart
         }
     }
 
+    /**
+     * get the HTML and JS code for the configured chart
+     * @return string   HTML and JS code for the chart
+     */
     public function toString()
     {
         if (!function_exists('gd_info')) {
@@ -181,7 +296,9 @@ abstract class PMA_pChart_Chart extends PMA_Chart
         $this->prepareChart();
 
         //$this->chart->debugImageMap();
+        $this->chart->printErrors('GD');
 
+        // check if a user wanted a chart in one part
         if ($this->isContinuous()) {
             $this->render(1);
         }
@@ -195,6 +312,7 @@ abstract class PMA_pChart_Chart extends PMA_Chart
         }
         $returnData .= '</div>';
 
+        // add tooltips only if json is available
         if (function_exists('json_encode')) {
             $returnData .= '
                 <script type="text/javascript">
@@ -248,6 +366,31 @@ abstract class PMA_pChart_Chart extends PMA_Chart
     {
         return $this->chart->getImageMap();
     }
+
+    protected function getGraphAreaColor($component)
+    {
+        return $this->hexStrToDecComp($this->settings['graphAreaColor'], $component);
+    }
+
+    protected function getGraphAreaGradientColor($component)
+    {
+        return $this->hexStrToDecComp($this->settings['graphAreaGradientColor'], $component);
+    }
+
+    protected function getGridColor($component)
+    {
+        return $this->hexStrToDecComp($this->settings['gridColor'], $component);
+    }
+
+    protected function getScaleColor($component)
+    {
+        return $this->hexStrToDecComp($this->settings['scaleColor'], $component);
+    }
+
+    protected function getTitleBgColor($component)
+    {
+        return $this->hexStrToDecComp($this->settings['titleBgColor'], $component);
+    }
 }
 
 ?>
diff --git a/libraries/chart/pma_pchart_multi.php b/libraries/chart/pma_pchart_multi.php
index 5570d2a2a..945011cfb 100644
--- a/libraries/chart/pma_pchart_multi.php
+++ b/libraries/chart/pma_pchart_multi.php
@@ -1,10 +1,19 @@
 <?php
+/**
+ * @author Martynas Mickevicius <mmartynas@gmail.com>
+ * @package phpMyAdmin
+ */
 
+/**
+ *
+ */
 require_once 'pma_pchart_chart.php';
 
-/*
+/**
  * Base class for every chart that uses multiple series.
  * All of these charts will require legend box.
+ * @abstract
+ * @package phpMyAdmin
  */
 abstract class PMA_pChart_multi extends PMA_pChart_chart
 {
@@ -16,6 +25,9 @@ abstract class PMA_pChart_multi extends PMA_pChart_chart
         $this->setLegendMargins(array(20, 10, 0, 0));
     }
 
+    /**
+     * data set preparation for multi serie graphs
+     */
     protected function prepareDataSet()
     {
         $values = array_values($this->data);
@@ -48,6 +60,9 @@ abstract class PMA_pChart_multi extends PMA_pChart_chart
         $this->dataSet->SetYAxisName($this->getYLabel());
     }
 
+    /**
+     * set graph area dimensions with respect to legend box size
+     */
     protected function setGraphAreaDimensions()
     {
         $this->chart->setGraphArea(
@@ -58,11 +73,17 @@ abstract class PMA_pChart_multi extends PMA_pChart_chart
         );
     }
 
+    /**
+     * multi serie charts need a legend. draw it
+     */
     protected function drawChart()
     {
         $this->drawLegend();
     }
 
+    /**
+     * draws a legend
+     */
     protected function drawLegend()
     {
         // Draw the legend
diff --git a/libraries/chart/pma_pchart_multi_bar.php b/libraries/chart/pma_pchart_multi_bar.php
index a268f9351..c3fb53b66 100644
--- a/libraries/chart/pma_pchart_multi_bar.php
+++ b/libraries/chart/pma_pchart_multi_bar.php
@@ -1,7 +1,18 @@
 <?php
+/**
+ * @author Martynas Mickevicius <mmartynas@gmail.com>
+ * @package phpMyAdmin
+ */
 
+/**
+ *
+ */
 require_once 'pma_pchart_multi.php';
 
+/**
+ * implements multi bar chart
+ * @package phpMyAdmin
+ */
 class PMA_pChart_multi_bar extends PMA_pChart_multi
 {
     public function __construct($data, $options = null)
@@ -11,6 +22,9 @@ class PMA_pChart_multi_bar extends PMA_pChart_multi
         $this->settings['scale'] = SCALE_NORMAL;
     }
 
+    /**
+     * draws multi bar graph
+     */
     protected function drawChart()
     {
         parent::drawChart();
diff --git a/libraries/chart/pma_pchart_multi_line.php b/libraries/chart/pma_pchart_multi_line.php
index 576b40ff8..3507f870a 100644
--- a/libraries/chart/pma_pchart_multi_line.php
+++ b/libraries/chart/pma_pchart_multi_line.php
@@ -1,7 +1,18 @@
 <?php
+/**
+ * @author Martynas Mickevicius <mmartynas@gmail.com>
+ * @package phpMyAdmin
+ */
 
+/**
+ *
+ */
 require_once 'pma_pchart_multi.php';
 
+/**
+ * implements multi line chart
+ * @package phpMyAdmin
+ */
 class PMA_pChart_multi_line extends PMA_pChart_multi
 {
     public function __construct($data, $options = null)
@@ -11,6 +22,9 @@ class PMA_pChart_multi_line extends PMA_pChart_multi
         $this->settings['scale'] = SCALE_NORMAL;
     }
 
+    /**
+     * draws multi line chart
+     */
     protected function drawChart()
     {
         parent::drawChart();
diff --git a/libraries/chart/pma_pchart_multi_radar.php b/libraries/chart/pma_pchart_multi_radar.php
index 1a3170714..4af060757 100644
--- a/libraries/chart/pma_pchart_multi_radar.php
+++ b/libraries/chart/pma_pchart_multi_radar.php
@@ -1,7 +1,18 @@
 <?php
+/**
+ * @author Martynas Mickevicius <mmartynas@gmail.com>
+ * @package phpMyAdmin
+ */
 
+/**
+ * 
+ */
 require_once 'pma_pchart_multi.php';
 
+/**
+ * implements multi radar chart
+ * @package phpMyAdmin
+ */
 class PMA_pChart_multi_radar extends PMA_pChart_multi
 {
     public function __construct($data, $options = null)
@@ -11,7 +22,7 @@ class PMA_pChart_multi_radar extends PMA_pChart_multi
         $this->normalizeValues();
     }
 
-    /*
+    /**
      * Get the largest value from the data and normalize all the other values.
      */
     private function normalizeValues()
@@ -19,12 +30,15 @@ class PMA_pChart_multi_radar extends PMA_pChart_multi
         $maxValue = 0;
         $keys = array_keys($this->data);
         $valueKey = $keys[1];
+
+        // get the max value
         foreach ($this->data[$valueKey] as $values) {
             if (max($values) > $maxValue) {
                 $maxValue = max($values);
             }
         }
 
+        // normalize all the values according to the max value
         foreach ($this->data[$valueKey] as &$values) {
             foreach ($values as &$value) {
                 $value = $value / $maxValue * 10;
@@ -32,12 +46,28 @@ class PMA_pChart_multi_radar extends PMA_pChart_multi
         }
     }
 
+    /**
+     * graph area for the radar chart does not include grid lines
+     */
     protected function drawGraphArea()
     {
-        $this->chart->drawGraphArea(213,217,221,FALSE);
-        $this->chart->drawGraphAreaGradient(163,203,167,50);
+        $this->chart->drawGraphArea(
+                $this->getGraphAreaColor(RED),
+                $this->getGraphAreaColor(GREEN),
+                $this->getGraphAreaColor(BLUE),
+                FALSE
+        );
+        $this->chart->drawGraphAreaGradient(
+                $this->getGraphAreaGradientColor(RED),
+                $this->getGraphAreaGradientColor(GREEN),
+                $this->getGraphAreaGradientColor(BLUE),
+                50
+        );
     }
 
+    /**
+     * draw multi radar chart
+     */
     protected function drawChart()
     {
         parent::drawChart();
diff --git a/libraries/chart/pma_pchart_pie.php b/libraries/chart/pma_pchart_pie.php
index 52f12575e..c8eced9d3 100644
--- a/libraries/chart/pma_pchart_pie.php
+++ b/libraries/chart/pma_pchart_pie.php
@@ -1,17 +1,32 @@
 <?php
+/**
+ * @author Martynas Mickevicius <mmartynas@gmail.com>
+ * @package phpMyAdmin
+ */
 
+/**
+ *
+ */
 require_once 'pma_pchart_multi.php';
 
+/**
+ * implements pie chart
+ * @package phpMyAdmin
+ */
 class PMA_pChart_Pie extends PMA_pChart_multi
 {
     public function __construct($data, $options = null)
     {
+        // limit data size, no more than 18 pie slices
         $data = array_slice($data, 0, 18, true);
         parent::__construct($data, $options);
 
         $this->setAreaMargins(array(20, 10, 20, 20));
     }
 
+    /**
+     * prepare data set for the pie chart
+     */
     protected function prepareDataSet()
     {
         // Dataset definition 
@@ -21,12 +36,28 @@ class PMA_pChart_Pie extends PMA_pChart_multi
         $this->dataSet->SetAbsciseLabelSerie("Keys");
     }
 
+    /**
+     * graph area for the pie chart does not include grid lines
+     */
     protected function drawGraphArea()
     {
-        $this->chart->drawGraphArea(213,217,221,FALSE);
-        $this->chart->drawGraphAreaGradient(163,203,167,50);
+        $this->chart->drawGraphArea(
+                $this->getGraphAreaColor(RED),
+                $this->getGraphAreaColor(GREEN),
+                $this->getGraphAreaColor(BLUE),
+                FALSE
+        );
+        $this->chart->drawGraphAreaGradient(
+                $this->getGraphAreaGradientColor(RED),
+                $this->getGraphAreaGradientColor(GREEN),
+                $this->getGraphAreaGradientColor(BLUE),
+                50
+        );
     }
 
+    /**
+     * draw the pie chart
+     */
     protected function drawChart()
     {
         parent::drawChart();
@@ -46,6 +77,9 @@ class PMA_pChart_Pie extends PMA_pChart_multi
                 120,PIE_PERCENTAGE,FALSE,60,30,10,1);
     }
 
+    /**
+     * draw legend for the pie chart
+     */
     protected function drawLegend()
     {
         $this->chart->drawPieLegend(
diff --git a/libraries/chart/pma_pchart_single.php b/libraries/chart/pma_pchart_single.php
index a64a6a2cd..424516824 100644
--- a/libraries/chart/pma_pchart_single.php
+++ b/libraries/chart/pma_pchart_single.php
@@ -1,9 +1,18 @@
 <?php
+/**
+ * @author Martynas Mickevicius <mmartynas@gmail.com>
+ * @package phpMyAdmin
+ */
 
+/**
+ *
+ */
 require_once 'pma_pchart_chart.php';
 
-/*
+/**
  * Base class for every chart that uses only one series.
+ * @abstract
+ * @package phpMyAdmin
  */
 abstract class PMA_pChart_single extends PMA_pChart_chart
 {
@@ -12,6 +21,9 @@ abstract class PMA_pChart_single extends PMA_pChart_chart
         parent::__construct($data, $options);
     }
 
+    /**
+     * data set preparation for single serie charts
+     */
     protected function prepareDataSet()
     {
         $values = array_values($this->data);
diff --git a/libraries/chart/pma_pchart_single_bar.php b/libraries/chart/pma_pchart_single_bar.php
index d08e4f6e7..009749fb6 100644
--- a/libraries/chart/pma_pchart_single_bar.php
+++ b/libraries/chart/pma_pchart_single_bar.php
@@ -1,7 +1,18 @@
 <?php
+/**
+ * @author Martynas Mickevicius <mmartynas@gmail.com>
+ * @package phpMyAdmin
+ */
 
+/**
+ * 
+ */
 require_once 'pma_pchart_single.php';
 
+/**
+ * implements single bar chart
+ * @package phpMyAdmin
+ */
 class PMA_pChart_single_bar extends PMA_pChart_single
 {
     public function __construct($data, $options = null)
@@ -9,6 +20,9 @@ class PMA_pChart_single_bar extends PMA_pChart_single
         parent::__construct($data, $options);
     }
 
+    /**
+     * draws single bar chart
+     */
     protected function drawChart()
     {
         // Draw the bar chart
diff --git a/libraries/chart/pma_pchart_single_line.php b/libraries/chart/pma_pchart_single_line.php
index 4104ad28e..2ffe3440a 100644
--- a/libraries/chart/pma_pchart_single_line.php
+++ b/libraries/chart/pma_pchart_single_line.php
@@ -1,7 +1,18 @@
 <?php
+/**
+ * @author Martynas Mickevicius <mmartynas@gmail.com>
+ * @package phpMyAdmin
+ */
 
+/**
+ *
+ */
 require_once 'pma_pchart_single.php';
 
+/**
+ * implements single line chart
+ * @package phpMyAdmin
+ */
 class PMA_pChart_single_line extends PMA_pChart_single
 {
     public function __construct($data, $options = null)
@@ -9,6 +20,9 @@ class PMA_pChart_single_line extends PMA_pChart_single
         parent::__construct($data, $options);
     }
 
+    /**
+     * draws single line chart
+     */
     protected function drawChart()
     {
         // Draw the line chart
diff --git a/libraries/chart/pma_pchart_single_radar.php b/libraries/chart/pma_pchart_single_radar.php
index f75b24bb4..db0110d21 100644
--- a/libraries/chart/pma_pchart_single_radar.php
+++ b/libraries/chart/pma_pchart_single_radar.php
@@ -1,7 +1,18 @@
 <?php
+/**
+ * @author Martynas Mickevicius <mmartynas@gmail.com>
+ * @package phpMyAdmin
+ */
 
+/**
+ * 
+ */
 require_once 'pma_pchart_single.php';
 
+/**
+ * implements single radar chart
+ * @package phpMyAdmin
+ */
 class PMA_pChart_single_radar extends PMA_pChart_single
 {
     public function __construct($data, $options = null)
@@ -11,7 +22,7 @@ class PMA_pChart_single_radar extends PMA_pChart_single
         $this->normalizeValues();
     }
 
-    /*
+    /**
      * Get the largest value from the data and normalize all the other values.
      */
     private function normalizeValues()
@@ -26,12 +37,28 @@ class PMA_pChart_single_radar extends PMA_pChart_single
         }
     }
 
+    /**
+     * graph area for the radar chart does not include grid lines
+     */
     protected function drawGraphArea()
     {
-        $this->chart->drawGraphArea(213,217,221,FALSE);
-        $this->chart->drawGraphAreaGradient(163,203,167,50);
+        $this->chart->drawGraphArea(
+                $this->getGraphAreaColor(RED),
+                $this->getGraphAreaColor(GREEN),
+                $this->getGraphAreaColor(BLUE),
+                FALSE
+        );
+        $this->chart->drawGraphAreaGradient(
+                $this->getGraphAreaGradientColor(RED),
+                $this->getGraphAreaGradientColor(GREEN),
+                $this->getGraphAreaGradientColor(BLUE),
+                50
+        );
     }
 
+    /**
+     * draws the radar chart
+     */
     protected function drawChart()
     {
         // when drawing radar graph we can specify the border from the top of
diff --git a/libraries/chart/pma_pchart_stacked_bar.php b/libraries/chart/pma_pchart_stacked_bar.php
index 5b8fcedca..1449c2ff9 100644
--- a/libraries/chart/pma_pchart_stacked_bar.php
+++ b/libraries/chart/pma_pchart_stacked_bar.php
@@ -1,7 +1,18 @@
 <?php
+/**
+ * @author Martynas Mickevicius <mmartynas@gmail.com>
+ * @package phpMyAdmin
+ */
 
+/**
+ *
+ */
 require_once 'pma_pchart_multi.php';
 
+/**
+ * implements stacked bar chart
+ * @package phpMyAdmin
+ */
 class PMA_pChart_stacked_bar extends PMA_pChart_multi
 {
     public function __construct($data, $options = null)
@@ -9,6 +20,9 @@ class PMA_pChart_stacked_bar extends PMA_pChart_multi
         parent::__construct($data, $options);
     }
 
+    /**
+     * draws stacked bar chart
+     */
     protected function drawChart()
     {
         parent::drawChart();