/* This notice must remain at all times. pie.js Copyright (c) Balamurugan S, 2005. sbalamurugan @ hotmail.com Development support by Jexp, Inc http://www.jexp.com This package is free software. It is distributed under GPL - legalese removed, it means that you can use this for any purpose, but cannot charge for this software. Any enhancements you make to this piece of code, should be made available free to the general public! Latest version can be downloaded from http://www.sbmkpm.com This library 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. pie.js provides a simple mechanism to draw pie charts. It uses wz_jsgraphics.js which is copyright of its author. Usage: var p = new pie(); p.add("title1",value1); p.add("title2",value2); p.render("canvas_name", "graph title"); //where canvas_name is a div defined INSIDE body tag

*/ hD="0123456789ABCDEF"; function d2h(d) { var h = hD.substr(d&15,1); while(d>15) {d>>=4;h=hD.substr(d&15,1)+h;} return h; } function h2d(h) { return parseInt(h,16); } function pie() { this.ct = 0; this.data = new Array(); this.x_name = new Array(); this.max = 0; this.c_array = new Array(); this.c_array[0] = new Array(243, 234, 28); this.c_array[1] = new Array(137, 198, 88); this.c_array[2] = new Array(255, 102, 51); /* this.c_array[3] = new Array(111, 120, 96); this.c_array[4] = new Array(224, 119, 96); this.c_array[5] = new Array(80, 159, 144); this.c_array[6] = new Array(207, 88, 95); this.c_array[7] = new Array(64, 135, 96); this.c_array[8] = new Array(239, 160, 95); this.c_array[9] = new Array(144, 151, 80); this.c_array[10] = new Array(255, 136, 80); */ this.getColor = function() { if(this.ct >= (this.c_array.length-1)) this.ct = 0; else this.ct++; return "#" + d2h(this.c_array[this.ct][0]) + d2h(this.c_array[this.ct][1]) + d2h(this.c_array[this.ct][2]); } this.add = function(x_name, value) { this.x_name.push(x_name); this.data.push(parseInt(value,10)); this.max += parseInt(value,10); } this.fillArc = function(x, y, r, st_a, en_a, jg) { //var number_of_steps = Math.round(2.1 * Math.PI * r ); var number_of_steps = en_a - st_a ; var angle_increment = 2 * Math.PI / number_of_steps; var xc = new Array(); var yc = new Array(); st_r = st_a*Math.PI / 180; en_r = en_a*Math.PI / 180; for (angle = st_r; angle <= en_r; angle += angle_increment) { if(en_r < angle + angle_increment) angle = en_r; var y2 = Math.sin(angle) * r ; var x2 = Math.cos(angle) * r ; xc.push(x+x2); yc.push(y-y2); //jg.drawLine(x+x2, y-y2, x+x2, y-y2); } xc.push(x); yc.push(y); jg.fillPolygon(xc, yc); //jg.setColor("black"); //jg.drawLine(x, y, x+ln_x, y-ln_y); } this.render = function(canvas, title) { var jg = new jsGraphics(canvas); var r = 50; var sx = 50; var sy = 50; var hyp = 30; var fnt = 12; // shadow //jg.setColor("gray"); //this.fillArc(sx+5, sy+5, r, 0, 360, jg); //jg.fillEllipse(sx+5-r, sy+5-r, 2*r, 2*r); var st_angle = 0; for(i = 0; i