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annotate js/bt/other_libs/excanvas_0002/examples/example1.html @ 47:cbfe386cb51b

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Add a function to refresh opened libraries. The source URL of each libraries is now tracked, which allows for auto refreshing the libraries based on various events. The obvious use case is to refresh the library when an atom has been added to Scald, for example via a Popups dialog.
author Franck Deroche <defr@ows.fr>
date Mon, 15 Feb 2010 14:08:04 +0000
parents 0d557e6e73f7
children
rev   line source
eads@18 1 <!--
eads@18 2 Copyright 2006 Google Inc.
eads@18 3
eads@18 4 Licensed under the Apache License, Version 2.0 (the "License");
eads@18 5 you may not use this file except in compliance with the License.
eads@18 6 You may obtain a copy of the License at
eads@18 7
eads@18 8 http://www.apache.org/licenses/LICENSE-2.0
eads@18 9
eads@18 10 Unless required by applicable law or agreed to in writing, software
eads@18 11 distributed under the License is distributed on an "AS IS" BASIS,
eads@18 12 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
eads@18 13 See the License for the specific language governing permissions and
eads@18 14 limitations under the License.
eads@18 15 -->
eads@18 16 <html>
eads@18 17 <head>
eads@18 18 <title>ExplorerCanvas Example 1</title>
eads@18 19 <!--[if IE]><script type="text/javascript" src="../excanvas.js"></script><![endif]-->
eads@18 20 <script type="text/javascript">
eads@18 21 var canvas, ctx;
eads@18 22 var particles = [];
eads@18 23 var NUM_PARTICLES = 20;
eads@18 24
eads@18 25 function Particle() {
eads@18 26 this.x = Math.random() * canvas.width;
eads@18 27 this.y = Math.random() * canvas.height;
eads@18 28
eads@18 29 this.xvel = Math.random() * 5 - 2.5;
eads@18 30 this.yvel = Math.random() * 5 - 2.5;
eads@18 31 }
eads@18 32
eads@18 33 Particle.prototype.update = function() {
eads@18 34 this.x += this.xvel;
eads@18 35 this.y += this.yvel;
eads@18 36
eads@18 37 this.yvel += 0.1;
eads@18 38
eads@18 39 if (this.x > canvas.width || this.x < 0) {
eads@18 40 this.xvel = -this.xvel;
eads@18 41 }
eads@18 42
eads@18 43 if (this.y > canvas.height || this.y < 0) {
eads@18 44 this.yvel = -this.yvel;
eads@18 45 }
eads@18 46 }
eads@18 47
eads@18 48 function loop() {
eads@18 49 ctx.clearRect(0, 0, canvas.width, canvas.height);
eads@18 50
eads@18 51 for(var i = 0; i < NUM_PARTICLES; i++) {
eads@18 52 particles[i].update();
eads@18 53
eads@18 54 ctx.beginPath();
eads@18 55 ctx.moveTo(particles[i].x, particles[i].y);
eads@18 56 ctx.lineTo(particles[i].x - particles[i].xvel,
eads@18 57 particles[i].y - particles[i].yvel);
eads@18 58 ctx.stroke();
eads@18 59 ctx.closePath();
eads@18 60 }
eads@18 61
eads@18 62 setTimeout(loop, 10);
eads@18 63 }
eads@18 64
eads@18 65 function load() {
eads@18 66 canvas = document.getElementById("cv");
eads@18 67 ctx = canvas.getContext("2d");
eads@18 68
eads@18 69 for(var i = 0; i < NUM_PARTICLES; i++) {
eads@18 70 particles[i] = new Particle();
eads@18 71 }
eads@18 72
eads@18 73 ctx.lineWidth = "2";
eads@18 74 ctx.strokeStyle = "rgb(255, 255, 255)";
eads@18 75 loop();
eads@18 76 }
eads@18 77 </script>
eads@18 78 <style>
eads@18 79 body {
eads@18 80 background-color:black;
eads@18 81 margin:50px;
eads@18 82 text-align:center;
eads@18 83 }
eads@18 84
eads@18 85 canvas {
eads@18 86 border:1px solid #444;
eads@18 87 }
eads@18 88 </style>
eads@18 89 </head>
eads@18 90 <body onload="load();">
eads@18 91 <canvas id="cv" width="400" height="300"></canvas>
eads@18 92 </body>
eads@18 93 </html>