137 lines
3.3 KiB
HTML
137 lines
3.3 KiB
HTML
<!doctype html>
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<html><head>
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<script src="https://code.jquery.com/jquery-3.7.1.min.js"></script>
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<script src="stomp.js"></script>
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<style>
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#cnvs {
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border: none;
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-moz-border-radius: 4px;
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cursor: url(pencil.cur),crosshair;
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position: absolute;
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overflow: hidden;
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width: 100%;
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height: 100%;
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}
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#cnvs:active {
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cursor: url(pencil.cur),crosshair;
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}
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body {
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overflow: hidden;
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}
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</style>
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<title>RabbitMQ Web STOMP Examples: Bunny Drawing</title>
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<link href="main.css" rel="stylesheet" type="text/css"/>
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</head><body lang="en">
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<h1><a href="index.html">RabbitMQ Web STOMP Examples</a> > Bunny Drawing</h1>
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<canvas id="cnvs"></canvas>
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<script>
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var send; var draw;
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send = draw = function(){};
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var lines = [];
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var canvas = document.getElementById('cnvs');
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if (canvas.getContext) {
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var ctx = canvas.getContext('2d');
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var img = new Image();
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img.onload = function() {
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ctx.drawImage(img, 230, 160);
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};
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img.src = 'bunny.png';
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draw = function(p) {
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ctx.beginPath();
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ctx.moveTo(p.x1, p.y1);
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ctx.lineTo(p.x2, p.y2);
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ctx.stroke();
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ctx.drawImage(img, 230, 160);
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};
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var do_resize = function() {
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canvas.width = window.innerWidth;
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canvas.height = window.innerHeight;
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ctx.font = "bold 20px sans-serif";
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ctx.fillStyle = "#444";
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ctx.fillText("Draw wings on the bunny!", 260, 100);
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ctx.font = "normal 16px sans-serif";
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ctx.fillStyle = "#888";
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ctx.fillText("(For more fun open a second browser)", 255, 130);
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ctx.drawImage(img, 230, 160);
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ctx.strokeStyle = "#fa0";
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ctx.lineWidth = "10";
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ctx.lineCap = "round";
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$.map(lines, function (p) {
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draw(p);
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});
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};
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$(window).resize(do_resize);
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$(do_resize);
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var pos = $('#cnvs').position();
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var prev = null;
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$('#cnvs').mousedown(function(evt) {
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evt.preventDefault();
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evt.stopPropagation();
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$('#cnvs').bind('mousemove', function(e) {
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var curr = {x:e.pageX-pos.left, y:e.pageY-pos.top};
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if (!prev) {
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prev = curr;
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return;
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}
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if (Math.sqrt(Math.pow(prev.x - curr.x, 2) +
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Math.pow(prev.y - curr.y, 2)) > 8) {
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var p = {x1:prev.x, y1:prev.y, x2:curr.x, y2:curr.y}
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lines.push(p);
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draw(p);
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send(JSON.stringify(p));
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prev = curr;
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}
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});
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});
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$('html').mouseup(function() {
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prev = null;
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$('#cnvs').unbind('mousemove');
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});
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}
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else {
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document.write("Sorry - this demo requires a browser with canvas tag support.");
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}
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// Stomp.js boilerplate
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var ws = new WebSocket('ws://' + window.location.hostname + ':15674/ws');
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var client = Stomp.over(ws);
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client.debug = function() {
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if (window.console && console.log && console.log.apply) {
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console.log.apply(console, arguments);
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}
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};
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send = function(data) {
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client.send('/topic/bunny', {}, data);
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};
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var on_connect = function(x) {
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id = client.subscribe('/topic/bunny', function(d) {
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var p = JSON.parse(d.body);
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lines.push(p);
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draw(p, true);
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});
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};
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var on_error = function() {
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console.log('error');
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};
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client.connect('guest', 'guest', on_connect, on_error, '/');
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</script>
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</body></html>
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