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selectionSort.js

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var svgNS = "http://www.w3.org/2000/svg";

var xlinkNS = "http://www.w3.org/1999/xlink";

var rectArray = new Array();

var animationArray = new Array();

var animationPlace = 0;

var speed = 1000;

var isPaused = false;

var isRunning;

var COLOR_DARK = "black";

var COLOR_DIM = "papayawhip"

var COLOR_TEXT_HIGHLIGHT = "orangered";

var COLOR_BAR_HIGHLIGHT1 = "red";

var COLOR_BAR_HIGHLIGHT2 = "cyan";

var ARRAY_SIZE = 15;

window.onload = function init(){

createArray();

draw();

}

function showValue(newValue, id) {

document.getElementById(id).innerHTML=newValue;

if(id == 'speedRange') {

speed = 2000 - (20 * newValue);

}

}

function randomize() {

clear();

ARRAY_SIZE = document.getElementById('arraySizeRange').innerHTML;

createArray();

draw();

animationPlace = 0;

animationArray = new Array();

}

function createArray() {

if(rectArray.length != 0) {

rectArray.splice(0,rectArray.length -1);

}

for(i=0;i<ARRAY_SIZE;i++){

var a = Math.floor(Math.random()*101)

if (a > 5) {

rectArray[i] = a;

}

else {

rectArray[i] = a + 5;

}

}

}

function draw() {

var xConstant = rectArray.length-15;

var initialX = 250 - (Math.floor(16.6 * xConstant));

for(i=0;i<rectArray.length;i++) {

createText(i,rectArray[i], initialX);

createRect(i,rectArray[i], initialX);

}

}

function arraySwap(a,b) {

var temp = rectArray[a];

rectArray[a]=rectArray[b];

rectArray[b]=temp;

}

function swap(a,b) {

var aRect = document.getElementById("rect_" + a);

var bRect = document.getElementById("rect_" + b);

var aX = aRect.getAttribute("x");

var bX = bRect.getAttribute("x");

var aText = document.getElementById("text_" + a);

var bText = document.getElementById("text_" + b);

var aTextX = aText.getAttribute("x");

var bTextX = bText.getAttribute("x");

aRect.setAttribute("x",bX);

bRect.setAttribute("x",aX);

aText.setAttribute("x",bTextX);

bText.setAttribute("x",aTextX);

aRect.setAttribute("id","rect_" + b);

aText.setAttribute("id","text_" + b);

bRect.setAttribute("id","rect_" + a);

bText.setAttribute("id","text_" + a);

}

function clear() {

var a = document.getElementById("simulationArea");

for(i=0;i<2*rectArray.length;i++) {

var t = a.lastChild;

t.parentNode.removeChild(t);

}

var w = document.getElementById("summaryOL");

while (w.childNodes.length >= 1) {

w.removeChild(w.lastChild);

}

}

function createRect(id,height, initialX) {

var newRect = document.createElementNS(svgNS,"rect");

var newId = "rect_" + id;

var xCoord = initialX + id*30;

newRect.setAttribute("id",newId);

newRect.setAttribute("width",25);

newRect.setAttribute("height",height);

newRect.setAttribute("x",xCoord);

newRect.setAttribute("y",50);

newRect.setAttribute("fill",COLOR_DARK);

document.getElementById("simulationArea").appendChild(newRect);

}

function createText(id,value, initialX) {

var a = initialX + id*30+14;

var newText = document.createElementNS(svgNS,"text");

var newId = "text_" + id;

newText.setAttribute("id",newId);

newText.setAttribute("x",a);

newText.setAttribute("y",42);

newText.setAttribute("font-size","11px");

newText.setAttribute("text-anchor","middle");

newText.setAttribute("fill",COLOR_DARK);

var textNode = document.createTextNode(value);

newText.appendChild(textNode);

document.getElementById("simulationArea").appendChild(newText);

}

function changeColor(id,clr) {

var a = document.getElementById(id);

a.setAttribute("fill",clr);

}

function animationManager() {

if (animationPlace<animationArray.length) {

var nextObject = animationArray[animationPlace];

if (nextObject.name == "swap") {

swap(nextObject.id1,nextObject.id2);

}

if (nextObject.name == "highlight1") {

changeColor(nextObject.id1,nextObject.color);

}

if (nextObject.name == "highlight2") {

changeColor(nextObject.id1,nextObject.color);

changeColor(nextObject.id2,nextObject.color);

}

if (nextObject.name == "pause") {

animationPlace++;

isRunning = setTimeout("animationManager()",speed);

return;

}

if (nextObject.name == "reset") {

for(var j = 0;j < rectArray.length;j++) {

changeColor("rect_" + j,COLOR_DARK);

}

var w = document.getElementById("summaryOL");

while (w.childNodes.length >= 1) {

w.removeChild(w.lastChild);

}

}

if (nextObject.name == "psuedo") {

var a = document.getElementById(nextObject.id1);

a.style.color=nextObject.color;

}

if (nextObject.name == "summary") {

var x=document.getElementById("summaryOL");

newLI = document.createElement("li");

newText = document.createTextNode(nextObject.txt);

newLI.appendChild(newText);

x.appendChild(newLI);

}

if (nextObject.name == "dim") {

for(var k = 0; k < nextObject.frIndex; k++) {

changeColor("rect_" + k, COLOR_DIM);

}

if (nextObject.toIndex != rectArray.length-1) {

for(var l = nextObject.toIndex + 1; l < rectArray.length;l++) {

changeColor("rect_" + l, COLOR_DIM);

}

}

}

animationPlace++;

animationManager();

}

}

function AnimationObject() {

this.name = arguments[0];

if (arguments[0] == "swap") {

this.id1 = arguments[1];

this.id2 = arguments[2];

}

if (arguments[0] == "highlight1" || arguments[0] == "psuedo") {

this.id1 = arguments[1];

this.color = arguments[2];

}

if (arguments[0] == "highlight2") {

this.id1 = arguments[1];

this.id2 = arguments[2];

this.color = arguments[3];

}

if (arguments[0] == "summary") {

this.txt = arguments[1];

}

if (arguments[0] == "dim") {

this.frIndex = arguments[1];

this.toIndex = arguments[2];

}

}

function selectionSort(inArray) {

var pause = new AnimationObject("pause");

var reset = new AnimationObject("reset");

for(var i = 0; i < inArray.length-1;i++) {

var min = i;

animationArray.push(new AnimationObject("highlight1",min,COLOR_BAR_HIGHLIGHT1));

animationArray.push(pause);

for(var j = i + 1; j < inArray.length;j++) {

animationArray.push(new AnimationObject("highlight1",j,COLOR_BAR_HIGHLIGHT2));

animationArray.push(pause);

if(inArray[j] < inArray[min]) {

animationArray.push(new AnimationObject("highlight1",min,COLOR_DARK));

min = j;

animationArray.push(new AnimationObject("highlight1",min,COLOR_BAR_HIGHLIGHT1));

animationArray.push(pause);

}

else

animationArray.push(new AnimationObject("highlight1",j,COLOR_DARK));

}

arraySwap(min,i);

animationArray.push("swap",min,i);

}

}

function runSelectionSort() {

if (!isPaused) {

selectionSort(rectArray);

animationManager();

}

else {

isPaused = false;

animationManager();

}

}

function pause() {

if (!isPaused) {

isPaused = true;

clearTimeout(isRunning);

}

}