+/* Copyright 2011 The Dominion of Awesome
+ * See COPYING for licensing information */
+enyo.kind({
+ name: "Labyrinth",
+ kind: "Hack",
+ style: "background-color: blue",
+ preferences: [
+ {name: "speed", label: "Speed", kind: "Slider", maximum: 20, minimum: 1, snap: 1},
+ {name: "handedness", label: "Left/Right Bias", kind: "Slider", maximum: 1, minimum: 0, snap: 0.01},
+ {name: "foregroundColor", label: "Foreground Color", kind: "ListSelector", items: colorList},
+ {name: "backgroundColor", label: "Background Color", kind: "ListSelector", items: colorList}
+ ],
+ speed: 5,
+ handedness: 0.5,
+ foregroundColor: 'white',
+ backgroundColor: 'blue',
+ grid: null,
+ boundary: null,
+ count: 0,
+ rest: 0,
+ components: [
+ {name: "viewport", nodeTag: "canvas"}
+ ],
+ rendered: function() {
+ this.viewport = this.$.viewport.hasNode();
+ this.ctx = this.viewport.getContext('2d');
+ this.init();
+ },
+ start: function() {
+ if (!this.timer)
+ this.timer = setInterval(this.draw.bind(this), 50);
+ },
+ stop: function() {
+ clearInterval(this.timer);
+ this.timer = null;
+ },
+ resize: function(w, h) {
+ this.viewport.width = this.w = w;
+ this.viewport.height = this.h = h;
+
+ this.ctx.fillStyle = this.backgroundColor;
+ this.ctx.strokeStyle = this.foregroundColor;
+
+ this.ctx.fillRect(0, 0, w, h);
+
+ this.gw = Math.ceil(w / 8);
+ this.gh = Math.ceil(h / 8);
+ this.grid = new Array(this.gw);
+ for (var i = 0; i < this.gw; i++) {
+ this.grid[i] = new Array(this.gh);
+ }
+
+ var x = Math.floor(Math.random() * this.gw);
+ var y = Math.floor(Math.random() * this.gh);
+ this.grid[x][y] = Math.random() > this.handedness ? false : true;
+ this.boundary = [{x: x, y: y}];
+ this.count = 1;
+ this.render(x, y);
+ },
+ preferencesChanged: function() {
+ this.init();
+ },
+ init: function() {
+ this.resize(window.innerWidth, window.innerHeight);
+ },
+ pick: function() {
+ var c = this.boundary[Math.floor(Math.random() * this.boundary.length)];
+ var possibilities = [];
+ for (var x = -1; x <= 1; x++) {
+ for (var y = -1; y <= 1; y++) {
+ if (y == 0 && x == 0)
+ continue;
+ if (c.x + x < 0 || c.x + x >= this.gw || c.y + y < 0 || c.y + y >= this.gh)
+ continue;
+ if (typeof(this.grid[c.x + x][c.y + y]) == 'undefined') {
+ possibilities.push({x: c.x + x, y: c.y + y});
+ }
+ }
+ }
+ if (possibilities.length == 0) {
+ for (var i = 0; i < this.boundary.length; i++) {
+ if (this.boundary[i].x == c.x && this.boundary[i].y == c.y) {
+ this.boundary.splice(i, 1);
+ break;
+ }
+ }
+ return this.pick();
+ }
+
+ var nc = possibilities[Math.floor(Math.random() * possibilities.length)];
+ this.grid[nc.x][nc.y] = Math.random() > this.handedness ? false : true;
+ this.boundary.push(nc);
+ return nc;
+ },
+ render: function(x, y) {
+ this.ctx.beginPath();
+ if (this.grid[x][y] === true) {
+ this.ctx.moveTo(x * 8 + 8, y * 8);
+ this.ctx.lineTo(x * 8, y * 8 + 8);
+ } else if (this.grid[x][y] === false) {
+ this.ctx.moveTo(x * 8, y * 8);
+ this.ctx.lineTo(x * 8 + 8, y * 8 + 8);
+ }
+ this.ctx.stroke();
+ },
+ draw: function() {
+ if (this.rest > 0) {
+ if (this.rest == 1)
+ this.init();
+ this.rest--;
+ return;
+ }
+
+ for (var i = 0; i < this.speed; i++) {
+ var c = this.pick();
+ this.render(c.x, c.y);
+ this.count++;
+ if (this.count == this.gw * this.gh) {
+ this.rest = 60;
+ return;
+ }
+ }
+ }
+});