//Modified and corrected by BS //to accomodate scale, max height, y axis 3 decimals //6:00 PM 4/8/2008 /* This notice must remain at all times. graph.js v2.0.1 20/07/2007 Copyright (c) Balamurugan S, 2007. 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. line.js provides a simple mechanism to draw line graphs. It uses wz_jsgraphics.js which is copyright of its author. Usage: var g = new line_graph(); g.add("title1",value); g.add("title2",value2); g.render("canvas_name", "graph title"); //not correct g.render("canvas_name", "graph title",height); //modified by bs //where canvas_name is a div defined INSIDE body tag

*/ var 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 line_graph() { this.ct = 0; this.data = new Array(); this.x_name = new Array(); this.scale = 1; this.max = -64000; //MAX INT this.user_min = 64000; this.min = 0; this.c_array = new Array(); this.c_array[0] = new Array(255, 192, 95); this.c_array[1] = new Array(80, 127, 175); this.c_array[2] = new Array(159, 87, 112); 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.setScale = function(scale) { this.scale = scale; } this.setColor = function(value) { this.ct = value; } this.setMax = function(value) { this.max = value; } this.setMin = function(value) { this.user_min = (this.user_min < value ? this.user_min : value); this.min = this.user_min; } this.add = function(x_name, value) { value = parseFloat(value,10)*this.scale; // value = parseFloat(value,10)*2; this.x_name.push(x_name); this.data.push(parseFloat(value,10)); if(value > this.max) this.max = parseFloat(value,10); if(value < this.user_min) this.user_min = parseFloat(value,10); } this.render = function(canvas, title, height) { var jg = new jsGraphics(canvas); var h = parseFloat(height); // var h = 250; if (typeof(height) == "number") h = height; var sx = 60; var dw = 15; var shadow = 0; var fnt = 12; var rtmax = sx + 10 + (dw+Math.round((dw/2))+shadow)*(this.data.length); //Right Max // Draw Horizontal markers var i; for(i = 1 ; i <= 10 ; i++) { jg.setColor("lightgrey"); jg.drawLine(0,Math.round((h/10*i)),rtmax+20,Math.round((h/10*i))); var ff = (eval((this.max - (this.max /10 * i))/eval((this.scale)+this.min))).toFixed(2); if(!((i/2)>parseInt(i/2))){ //IF i is even, Show y-axis value jg.setColor("black"); jg.drawString(ff+"",6.0,Math.round((h/10*i)-14)); } } // Draw the bar graph var color = this.getColor(); var oldx, oldy; jg.setStroke(1); for(i = 0; i < this.data.length; i++) { var ht1 = Math.round(this.data[i]*h/this.max) - (this.min*h/this.max); if((i >= 1)) { jg.setColor(color); jg.drawLine(oldx, h-oldy, sx, h-ht1); } jg.setColor("red"); jg.fillEllipse(sx-2, h-ht1-2, 5, 5); jg.setColor("black"); if((i/5)==parseInt(i/5)) { jg.drawString(this.x_name[i], sx, h);} oldx = sx; oldy = ht1; //Try to draw Vertical Grid Line jg.setColor("lightgrey"); if((i/5)==parseInt(i/5)) {jg.drawLine(oldx,h+5,oldx,h-300);} else {jg.drawLine(oldx,h+0,oldx,h-300);} sx = sx+dw+Math.round(dw/2)+shadow; } jg.setFont("Verdana", fnt, Font.BOLD); jg.drawStringRect(title, 0, h+fnt+4, rtmax+20, "center"); jg.paint(); } }