DokuWiki Plugin : AV Bar Chart

DokuWiki Plugin : AV Bar Chart

Compatible with DokuWiki

rc2007-05-24 +

Download

Generates a simple HTML/CSS bar chart.

Last updated on: 2009-05-15
Provides: Syntax

Similar to pchart

Tagged with chart, diagram, images, media

By Sherri W. (http://SyntaxSeed.com)

avtaskbox

Description

With this plugin you can create a quick and easy bar chart on your DokuWiki page. It uses CSS and HTML only and no images needed.

Screenshot and info available here: AV Bar Chart for Dokuwiki.

Syntax and Usage

<barchart>1000|A:500,B:50,C:250,D:1000</barchart>

The first value is the max number that your data set will go to.
After the | you have a comma separated list of labels and values to be graphed.
In the source of the plugin are config vars that let you customize the size, color and font of your chart.
Tested in IE 6, 7 and Firefox 2.0, 3.0+.

You can then use regular DokuWiki syntax to put a title above it and if needed, a legend below to describe the labels. If you make the bars wide, the labels can be full text.

Installation

Plugin Manager: Paste this URL into the Plugin Manager to install AVBarChart automatically: http://syntaxseed.com/downloads/plugin-avbarchart.zip
Manually: To get the plugin to work, manually install the plugin:
1. Make a new directory avbarchart/ in your plugins directory.
2. Add the source code below to a file syntax.php in the avbarchart directory.
3. Edit the config vars in the source code to customize your chart.

Configuration Vars:

// ********* CHART CONFIG SETTINGS *************

var $barWidth = 20;         //Pixel width of chart bars.
var $barColor = "#ccccff";  //Color of graph bars.
var $fontSize = "8pt;";     //Font size of labels and values.
var $maxPxHeight = "100";   //Maximum height of the chart in pixels.

// *********************************************

If your barWidth is not wider than the labels, your chart will look funny. Different colors for different bars is not supported currently.

Known Bugs

2009/03/12 - Yohan W (yohan [dot] widyakencana [at] kreators [dot] com)
- Error Warning: Cannot modify header information - headers already sent by (output started at C:\Program Files\xampp\htdocs\dokuwiki_castor\lib\plugins\avbarchart\syntax.php:157) in C:\Program Files\xampp\htdocs\dokuwiki_castor\inc\actions.php on line 154 when using headings (H1-H5).
- Not A Bug: Sorry, I've tested it with headings above and below the barchart plugin text and I don't get that error. This problem you're having is something different. Note that you cannot put wiki syntax IN the barchart plugin.~Sherri

Changelog

2007-10-19

created plugin.

2009-05-15

added URL to zip for automatic installation.

Source

syntax.php

<?php
/**
 * Plugin AVBarChart: Generates a very simple CSS/HTML bar chart"
 * 
 * USAGE: <barchart>MAXVAL|Label1:#,Label2:#,Label3:#</barchart>
 *
 * EXAMPLE: <barchart>100|A:55,B:5,C:23,D:38</barchart>
 *
 * @license    GPL 2 (http://www.gnu.org/licenses/gpl.html)
 * @author     Sherri W. (http://syntaxseed.com)
 */
 
if(!defined('DOKU_INC')) define('DOKU_INC',realpath(dirname(__FILE__).'/../../').'/');
if(!defined('DOKU_PLUGIN')) define('DOKU_PLUGIN',DOKU_INC.'lib/plugins/');
require_once(DOKU_PLUGIN.'syntax.php');
 
/**
 * All DokuWiki plugins to extend the parser/rendering mechanism
 * need to inherit from this class
 */
class syntax_plugin_avbarchart extends DokuWiki_Syntax_Plugin {
 
 
// ********* CHART CONFIG SETTINGS *************
 
var $barWidth = 20;         //Pixel width of chart bars.
var $barColor = "#ccccff";  //Color of graph bars.
var $fontSize = "8pt;";     //Font size of labels and values.
var $maxPxHeight = "100";   //Maximum height of the chart in pixels.
 
// *********************************************
 
 
    /**
     * return some info
 
     */
    function getInfo(){
        return array(
            'author' => 'Sherri W.',
            'email'  => 'Use my website: www.start.ofitall.com',
            'date'   => '2009-05-15,
            'name'   => 'AV Bar Chart',
            'desc'   => 'Generates a very simple CSS/HTML bar chart.',
            'url'    => 'http://www.dokuwiki.org/plugin:avbarchart',
        );
    }
 
    /**
     * What kind of syntax are we?
     */
    function getType(){
        return 'substition';
    } 
 
    /**
     * Where to sort in?
     */ 
    function getSort(){
        return 999;
    }
 
 
    /**
     * Connect pattern to lexer
     */
    function connectTo($mode) {
      $this->Lexer->addEntryPattern('\<barchart\>',$mode,'plugin_avbarchart');
    }
 
    function postConnect() {
      $this->Lexer->addExitPattern('\</barchart\>','plugin_avbarchart');
    }
 
 
    /**
     * Handle the match
     */
    function handle($match, $state, $pos, &$handler){
        switch ($state) {
          case DOKU_LEXER_ENTER : 
            return array($state, '');
          case DOKU_LEXER_MATCHED :
            break;
          case DOKU_LEXER_UNMATCHED :
 
            $chart = "";
            list($maxRange,$data1) = split("\|", $match);
            $maxRange = floatval($maxRange);
 
            if($maxRange > 0 && !empty($data1)){
 
            $values = split(",", $data1);
 
            $chart = "";
            foreach($values as $col){
              if(!empty($col)){
		list($label, $amount) = split(":", $col);
                $amount = floatval($amount);
                if(empty($label)){$label='&nbsp;';}
                if($amount >= 0){
                  $height = round(($amount/$maxRange*$this->maxPxHeight));
                  $chart .= "<td valign='bottom' align='center'><span style='font-size:".$this->fontSize.";'>".$amount."</span><br clear='all'><table style='display:inline;' cellpadding='1' cellspacing='0'><tr><td height='".$height."' width='".$this->barWidth."' bgcolor='".$this->barColor."' valign='bottom'></td></tr></table><br clear='all' /><span style='font-size:".$this->fontSize.";'><b>".$label."</b></span></td>";
                }
			  }
            }
 
            }
 
            $match = $chart;
            return array($state, $match);
 
 
          case DOKU_LEXER_EXIT :
            return array($state, '');
          case DOKU_LEXER_SPECIAL :
            break;
        }
        return array();
    }
 
 
    /**
     * Create output
     */
    function render($mode, &$renderer, $data) {
      if($mode == 'xhtml'){
        list($state, $match) = $data;
 
        switch ($state) {
          case DOKU_LEXER_ENTER : 
            $renderer->doc .= "<table border='0' cellspacing='2'><tr>"; 
            break;
 
          case DOKU_LEXER_MATCHED :
            break;
 
          case DOKU_LEXER_UNMATCHED :
 
            $renderer->doc .= $match; break;          
 
          case DOKU_LEXER_EXIT :
            $renderer->doc .= "</tr></table>"; 
            break;
 
          case DOKU_LEXER_SPECIAL :
            break;
        }
        return true; 
      }
   return false;
}
 
 
} // End class
?>

Comments / Discussion

Hi everyone, let me know what you think. ~Sherri

Simple and elegant plugin. Excellent work!. ~Dmitri

I liked it, too. But what I miss is a simple plugin for Gantt charts. This plugin could be the one if horizontal bars and different start points were allowed. Thanks! ~TJPP

This is a nice plugin. Whenever I use this avbarchart plugin, I kept getting an error message IF I'm using headers (H1-H5), stating that headers already been sent bla bla bla… How to solve this? Thanks ~Yohan

Sorry Yohan I don't know. The PHP error about headers have already been sent shouldn't be related to having headings on your page. ~Sherri
You using headers (h1-h5) shouldn't have anything to do with that. Probably you left an empty line in the beginning or the end of a .php file you edited (the plugin one?). Remove any of those and you'll be fine. ~ tduarte

Different colors for different bars

You can add the support for this by changing two lines (97 and 102) in your php code. If the color for individual bar is not given, the basic barColor is used instead. Example of usage:

<barchart>100|A:55:#FFCCCC,B:5,C:23,D:38</barchart>

Here is changed syntax.php file

<?php
/**
 * Plugin AVBarChart: Generates a very simple CSS/HTML bar chart"
 * 
 * USAGE: <barchart>MAXVAL|Label1:#:Color1,Label2:#:Color2,Label3:#:Color3</barchart>
 *
 * EXAMPLE: <barchart>100|A:55:#FFCCCC,B:5,C:23,D:38</barchart>
 *
 * @license    GPL 2 (http://www.gnu.org/licenses/gpl.html)
 * @author     Sherri W. (http://syntaxseed.com)
 */
 
if(!defined('DOKU_INC')) define('DOKU_INC',realpath(dirname(__FILE__).'/../../').'/');
if(!defined('DOKU_PLUGIN')) define('DOKU_PLUGIN',DOKU_INC.'lib/plugins/');
require_once(DOKU_PLUGIN.'syntax.php');
 
/**
 * All DokuWiki plugins to extend the parser/rendering mechanism
 * need to inherit from this class
 */
class syntax_plugin_avbarchart extends DokuWiki_Syntax_Plugin {
 
 
// ********* CHART CONFIG SETTINGS *************
 
var $barWidth = 25;         //Pixel width of chart bars.
var $barColor = "#ccccff";  //Color of graph bars.
var $fontSize = "8pt;";     //Font size of labels and values.
var $maxPxHeight = "200";   //Maximum height of the chart in pixels.
 
// *********************************************
 
 
    /**
     * return some info
     */
    function getInfo(){
        return array(
            'author' => 'Sherri W.',
            'email'  => 'Use my website: http://syntaxseed.com',
            'date'   => '2009-05-15',
            'name'   => 'AV Bar Chart',
            'desc'   => 'Generates a very simple CSS/HTML bar chart.',
            'url'    => 'http://wiki.splitbrain.org/wiki:plugins',
        );
    }
 
    /**
     * What kind of syntax are we?
     */
    function getType(){
        return 'substition';
    } 
 
    /**
     * Where to sort in?
     */ 
    function getSort(){
        return 999;
    }
 
 
    /**
     * Connect pattern to lexer
     */
    function connectTo($mode) {
      $this->Lexer->addEntryPattern('\<barchart\>',$mode,'plugin_avbarchart');
    }
 
    function postConnect() {
      $this->Lexer->addExitPattern('\</barchart\>','plugin_avbarchart');
    }
 
 
    /**
     * Handle the match
     */
    function handle($match, $state, $pos, &$handler){
        switch ($state) {
          case DOKU_LEXER_ENTER : 
            return array($state, '');
          case DOKU_LEXER_MATCHED :
            break;
          case DOKU_LEXER_UNMATCHED :
 
            $chart = "";
            list($maxRange,$data1) = split("\|", $match);
            $maxRange = floatval($maxRange);
 
            if($maxRange > 0 && !empty($data1)){
 
            $values = split(",", $data1);
 
            $chart = "";
            foreach($values as $col){
              if(!empty($col)){
		list($label, $amount, $color) = split(":", $col);
                $amount = floatval($amount);
                if(empty($label)){$label='&nbsp;';}
                if($amount >= 0){
                  $height = round(($amount/$maxRange*$this->maxPxHeight));
                  $chart .= "<td valign='bottom' align='center'><span style='font-size:".$this->fontSize.";'>".$amount."</span><br clear='all'><table style='display:inline;' cellpadding='1' cellspacing='0'><tr><td height='".$height."' width='".$this->barWidth."' bgcolor='".(empty($color) ? $this->barColor: $color)."' valign='bottom'></td></tr></table><br clear='all' /><span style='font-size:".$this->fontSize.";'><b>".$label."</b></span></td>";
                }
			  }
            }
 
            }
 
            $match = $chart;
            return array($state, $match);
 
 
          case DOKU_LEXER_EXIT :
            return array($state, '');
          case DOKU_LEXER_SPECIAL :
            break;
        }
        return array();
    }
 
 
    /**
     * Create output
     */
    function render($mode, &$renderer, $data) {
      if($mode == 'xhtml'){
        list($state, $match) = $data;
 
        switch ($state) {
          case DOKU_LEXER_ENTER : 
            $renderer->doc .= "<table border='0' cellspacing='2'><tr>"; 
            break;
 
          case DOKU_LEXER_MATCHED :
            break;
 
          case DOKU_LEXER_UNMATCHED :
 
            $renderer->doc .= $match; break;          
 
          case DOKU_LEXER_EXIT :
            $renderer->doc .= "</tr></table>"; 
            break;
 
          case DOKU_LEXER_SPECIAL :
            break;
        }
        return true; 
      }
   return false;
}
 
 
} // End class
?>

~ Gregor Anželj

Modification: New style and small fixes

It's amazing what effect a few small CSS styles can bring to this bar chart: round corners, a dropshadow and gradient background. Here I post my modified syntax.php, it implements following changes:

new bar-styles (round corners, a 3d-border, dropshadow, gradient background)
a new setting “$barPadding” that allows bars to be spaced evenly even when labels have different widths
better alignment of labels when there is a line-break in the text

Example:

<barchart>325|Google:268:red,Yahoo!<br>Mail:185:blue,GMX:86,Others:152</barchart>

Here is changed syntax.php file

<?php
/**
 * Plugin AVBarChart: Generates a very simple CSS/HTML bar chart"
 * 
 * USAGE: <barchart>MAXVAL|Label1:#,Label2:#,Label3:#</barchart>
 *
 * EXAMPLE: <barchart>100|A:55,B:5,C:23,D:38</barchart>
 *
 * @license    GPL 2 (http://www.gnu.org/licenses/gpl.html)
 * @author     Sherri W. (http://syntaxseed.com)
 */
 
if(!defined('DOKU_INC')) define('DOKU_INC',realpath(dirname(__FILE__).'/../../').'/');
if(!defined('DOKU_PLUGIN')) define('DOKU_PLUGIN',DOKU_INC.'lib/plugins/');
require_once(DOKU_PLUGIN.'syntax.php');
 
/**
 * All DokuWiki plugins to extend the parser/rendering mechanism
 * need to inherit from this class
 */
class syntax_plugin_avbarchart extends DokuWiki_Syntax_Plugin {
 
 
// ********* CHART CONFIG SETTINGS *************
 
var $barWidth = "25px";     //Pixel width of chart bars.
var $barPadding = "10px";   //Pixel padding on each side (left/right) of a bar.
var $barColor = "#ccccff";  //Color of graph bars.
var $fontSize = "8pt;";     //Font size of labels and values.
var $maxPxHeight = "200px"; //Maximum height of the chart in pixels.
 
// *********************************************
 
 
    /**
     * return some info
     */
    function getInfo(){
        return array(
            'author' => 'Sherri W.',
            'email'  => 'Use my website: http://syntaxseed.com',
            'date'   => '2009-05-15',
            'name'   => 'AV Bar Chart',
            'desc'   => 'Generates a very simple CSS/HTML bar chart.',
            'url'    => 'http://wiki.splitbrain.org/wiki:plugins',
        );
    }
 
    /**
     * What kind of syntax are we?
     */
    function getType(){
        return 'substition';
    } 
 
    /**
     * Where to sort in?
     */ 
    function getSort(){
        return 999;
    }
 
 
    /**
     * Connect pattern to lexer
     */
    function connectTo($mode) {
      $this->Lexer->addEntryPattern('\<barchart\>',$mode,'plugin_avbarchart');
    }
 
    function postConnect() {
      $this->Lexer->addExitPattern('\</barchart\>','plugin_avbarchart');
    }
 
 
    /**
     * Handle the match
     */
    function handle($match, $state, $pos, &$handler){
        switch ($state) {
          case DOKU_LEXER_ENTER : 
            return array($state, '');
          case DOKU_LEXER_MATCHED :
            break;
          case DOKU_LEXER_UNMATCHED :
 
            $chart = "";
            list($maxRange,$data1) = split("\|", $match);
            $maxRange = floatval($maxRange);
 
            if($maxRange > 0 && !empty($data1)){
 
            $values = split(",", $data1);
 
            $chart = "";
	    $labels = "";
            foreach($values as $col){
              if(!empty($col)){
		list($label, $amount, $color) = split(":", $col);
                $amount = floatval($amount);
                if(empty($label)){$label='&nbsp;';}
		if(empty($color)){$color=$this->barColor;}
                if($amount >= 0){
                  $height = round(($amount/$maxRange*$this->maxPxHeight));
		  $styleBorder = "border:1px outset ".$color.";-moz-border-radius:5px;-webkit-border-radius:5px;";
		  $styleShadow = "box-shadow:3px 2px 5px #888;-webkit-box-shadow:3px 2px 5px #888;-moz-box-shadow:3px 2px 5px #888;";
		  $styleGradient = "background:-moz-linear-gradient(top,".$color.",#FFFFFF);background:-webkit-gradient(linear,left top,left bottom,from(".$color."),to(#FFFFFF));filter:progid:DXImageTransform.Microsoft.Gradient(StartColorStr='".$color."', EndColorStr='#FFFFFF', GradientType=0);";
                  $chart .= "<td style='vertical-align:bottom;text-align:center'>"
			."<span style='font-size:".$this->fontSize.";'>".$amount."</span><br clear='all'>"
			."<table style='display:inline;padding-left:".$this->barPadding.";padding-right:".$this->barPadding.";' cellpadding=1 cellspacing=0>"
			."<tr>"
			."<td height='".$height."' width='".$this->barWidth."' style='height:".$height.";width:".$this->barWidth.";background-color:".$color.";vertical-align:bottom;".$styleBorder.$styleShadow.$styleGradient."'>&nbsp;</td>"
			."</tr>"
			."</table>"
			."</td>";
		  $labels .= "<td style='vertical-align:top;text-align:center;'><span style='font-size:".$this->fontSize.";'><b>".$label."</b></span></td>";
                }
	       }
             }
            }
 
            $match = $chart;
            return array($state, $match."</tr><tr>".$labels);
 
 
          case DOKU_LEXER_EXIT :
            return array($state, '');
          case DOKU_LEXER_SPECIAL :
            break;
        }
        return array();
    }
 
 
    /**
     * Create output
     */
    function render($mode, &$renderer, $data) {
      if($mode == 'xhtml'){
        list($state, $match) = $data;
 
        switch ($state) {
          case DOKU_LEXER_ENTER : 
            $renderer->doc .= "<table border='0' cellspacing='2'><tr>"; 
            break;
 
          case DOKU_LEXER_MATCHED :
            break;
 
          case DOKU_LEXER_UNMATCHED :
 
            $renderer->doc .= $match; break;          
 
          case DOKU_LEXER_EXIT :
            $renderer->doc .= "</tr></table>"; 
            break;
 
          case DOKU_LEXER_SPECIAL :
            break;
        }
        return true; 
      }
   return false;
}
 
} // End class
?>

~ Philipp Stacker