From f279b8f2ef1c80d2fca61c556f34acf095d2e038 Mon Sep 17 00:00:00 2001
From: Robert Sesek <rsesek@bluestatic.org>
Date: Sat, 11 Feb 2006 02:03:38 +0000
Subject: [PATCH] Got a pretty good pie graphing system

---
 graph_pie.php | 231 ++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 231 insertions(+)
 create mode 100644 graph_pie.php

diff --git a/graph_pie.php b/graph_pie.php
new file mode 100644
index 0000000..d8525ae
--- /dev/null
+++ b/graph_pie.php
@@ -0,0 +1,231 @@
+<?php
+/*=====================================================================*\
+|| ###################################################################
+|| # Iris Studios Shared Object Framework [#]issoversion[#]
+|| # Copyright ©2002-[#]year[#] Iris Studios, Inc.
+|| #
+|| # This program is free software; you can redistribute it and/or modify
+|| # it under the terms of the GNU General Public License as published by
+|| # the Free Software Foundation; version [#]gpl[#] of the License.
+|| #
+|| # This program is distributed in the hope that it will be useful, but
+|| # WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+|| # or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+|| # more details.
+|| #
+|| # You should have received a copy of the GNU General Public License along
+|| # with this program; if not, write to the Free Software Foundation, Inc.,
+|| # 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
+|| ###################################################################
+\*=====================================================================*/
+
+/**
+* Graphing system: pie chart
+* graph_pie.php
+*
+* @package	ISSO
+*/
+
+/**
+* Graphing System: Pie Chart
+*
+* This framework creates pie charts as PNG image strings. Simply add to
+* the data set and graph to get the byte stream returned.
+*
+* @author		Iris Studios, Inc.
+* @copyright	Copyright ©2002 - [#]year[#], Iris Studios, Inc.
+* @version		$Revision$
+* @package		ISSO
+* 
+*/
+class Graph_Pie
+{
+	/**
+	* Framework registry object
+	* @var	object
+	* @access	private
+	*/
+	var $registry = null;
+	
+	/**
+	* Graphing data set; 2D array of
+	* array(NAME, PERCENT, COLOR)
+	* @var	array
+	* @access	private
+	*/
+	var $dataset = array();
+	
+	/**
+	* Image resource
+	* @var	resource
+	* @access	private
+	*/
+	var $image = null;
+	
+	/**
+	* The dimensions of the image
+	* @var	array
+	* @access	private
+	*/
+	var $dimensions = array('width' => 550, 'height' => 350);
+	
+	/**
+	* Add a legend to the graph
+	* @var	bool
+	* @access	private
+	*/
+	var $legend = true;
+	
+	/**
+	* Title of the graph
+	* @var	string
+	* @access	private
+	*/
+	var $title = 'ISSO Pie Chart';
+	
+	// ###################################################################
+	/**
+	* Constructor
+	*/
+	function __construct(&$registry)
+	{
+		$this->registry =& $registry;
+		
+		$this->image = imagecreate($this->dimensions['width'], $this->dimensions['height']);
+	}
+	
+	// ###################################################################
+	/**
+	* (PHP 4) Constructor
+	*/
+	function Graph_Pie(&$registry)
+	{
+		$this->__construct($registry);
+	}
+	
+	// ###################################################################
+	/**
+	* Graphs the actual graph and returns a byte stream
+	*
+	* @access	public
+	*
+	* @return	string	Byte stream
+	*/
+	function graph()
+	{
+		$colours['black'] = imagecolorallocate($this->image, 0, 0, 0);
+		$colours['white'] = imagecolorallocate($this->image, 255, 255, 255);
+		
+		// fill background
+		imagefill($this->image, 0, 0, $colours['white']);
+		
+		// title the chart
+		imagestring($this->image, 5, ($this->dimensions['width'] - (imagefontwidth(5) * strlen($this->title))) / 2, 10, $this->title, $colours['black']);
+		
+		$center = array('x' => ($this->dimensions['width'] / 2), 'y' => ($this->dimensions['height'] / 2) + 10);
+		$radius = ($this->dimensions['height'] - 55);
+		
+		// draw a border
+		imageline($this->image, 0, 0, 0, $this->dimensions['height'], $colours['black']); // left
+		imageline($this->image, 0, $this->dimensions['height'] - 1, $this->dimensions['width'], $this->dimensions['height'] - 1, $colours['black']); // bottom
+		imageline($this->image, $this->dimensions['width'] - 1, 0, $this->dimensions['width'] - 1, $this->dimensions['height'], $colours['black']); // right
+		imageline($this->image, 0, 0, $this->dimensions['width'], 0, $colours['black']); // top
+				
+		$lastdeg = 0;
+		
+		foreach ($this->dataset AS $plot)
+		{
+			$deg = (360 / 100) * $plot[1];
+			imagefilledarc($this->image, $center['x'], $center['y'], $radius, $radius, $lastdeg, $deg + $lastdeg, $plot[2], IMG_ARC_PIE);
+			//imagefilledarc($this->image, $center['x'], $center['y'], $radius, $radius, $lastdeg, $deg + $lastdeg, $colours['black'], IMG_ARC_EDGED | IMG_ARC_NOFILL);
+			$lastdeg = $deg;
+		}
+		
+		// draw the ellipse (do here so it cleans up the arc edges)
+		imageellipse($this->image, $center['x'], $center['y'], $radius, $radius, $colours['black']);
+		
+		imagepng($this->image);
+		
+		//return $output;
+	}
+	
+	// ###################################################################
+	/**
+	* Sets the width and height of an image
+	*
+	* @access	public
+	*
+	* @param	integer	Width (pixels)
+	* @param	integer	Height (pixels)
+	*/
+	function set_dimensions($width, $height)
+	{
+		$this->dimensions['width'] = intval($width);
+		$this->dimensions['height'] = intval($height);
+		
+		$this->image = imagecreate($this->dimensions['width'], $this->dimensions['height']);
+	}
+	
+	// ###################################################################
+	/**
+	* Adds an entry to the data set without specifying a colour to add.
+	* This is the standard method as the colour should only be overridden
+	* if necessary.
+	*
+	* @access	public
+	*
+	* @param	string	Data column name
+	* @param	integer	Percentage of 100
+	*/
+	function add_data_set($name, $percent)
+	{
+		$this->dataset[] = array($name, intval($percent), $this->fetch_colour());
+	}
+	
+	// ###################################################################
+	/**
+	* Adds an entry ot the data set with specifying a colour. This works
+	* the same as add_data_st() but requires an array() as the 3rd parameter
+	* of R,G,B values
+	*
+	* @access	public
+	*
+	* @param	string	Data column name
+	* @param	integer	Percent of 100
+	* @param	array	Array of R,G,B values
+	*/
+	function add_data_set_colour($name, $percent, $colour)
+	{
+		$this->dataset[] = array($name, intval($percent), imagecolorallocate($this->image, $colour[0], $colour[1], $colour[2]));
+	}
+	
+	// ###################################################################
+	/**
+	* Fetches a colour from the allocated colour list and returns the value
+	*
+	* @access	private
+	*
+	* @return	integer	Allocated colour resource
+	*/
+	function fetch_colour()
+	{
+		static $colourlist = array(
+			array(255, 0, 0),
+			array(100, 0, 0)
+		);
+		static $allocated;
+		
+		$colour = $colourlist[ intval($allocated) ];
+		$allocated++;
+		
+		return imagecolorallocate($this->image, $colour[0], $colour[1], $colour[2]);
+	}
+}
+
+/*=====================================================================*\
+|| ###################################################################
+|| # $HeadURL$
+|| # $Id$
+|| ###################################################################
+\*=====================================================================*/
+?>
\ No newline at end of file
-- 
2.22.5