mirror of
https://github.com/danieleteti/delphimvcframework.git
synced 2024-11-16 08:15:53 +01:00
181 lines
5.1 KiB
HTML
181 lines
5.1 KiB
HTML
<!doctype html>
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<html>
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
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<title>Server Sent Events DelphiMVCFramework Example - Stock Tickets</title>
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<style media="screen" type="text/css">
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body {
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font-family: "Verdana", Tahoma, serif;
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}
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H1 {
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text-align: center;
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font-size: 150%;
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margin-bottom: 60px;
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}
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H2 {
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text-align: center;
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font-size: 125%;
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margin-bottom: 15px;
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}
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DIV#quotes {
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margin: 10px auto 80px auto;
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font-size: 140%;
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}
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DIV.quote {
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margin: 5px auto;
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width: 250px;
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font-size: 100%;
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}
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DIV.name {
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display: inline-block;
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width: 100px;
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padding: 3px;
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}
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DIV.price {
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display: inline-block;
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width: 100px;
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padding: 3px;
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text-align: right;
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transition: all 0.2s ease-out;
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}
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DIV#log {
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margin: 10px auto;
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width: 600px;
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height: 200px;
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background: gainsboro;
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padding: 5px;
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overflow-y: scroll;
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}
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DIV#notSupported {
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display: none;
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margin: 10px auto;
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text-align: center;
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color: red;
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font-size: 150%;
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}
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P.hint {
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width: 600px;
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margin: 10px auto;
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text-align: justify;
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text-indent: 20px;
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line-height: 135%;
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}
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</style>
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<script type="text/javascript">
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function start_updates() {
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if (!!window.EventSource) {
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//can be also local. We use a global var to allow to be stopped from outside.
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window.source = new EventSource("/stocks");
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// //this is a listener for a generic "message"
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// source.addEventListener("message", function(e) {
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// console.log(e);
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// updateQuote(e.data);
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// logMessage(e);
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// }, false);
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//this is a listener for a specific message named "stockupdate"
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source.addEventListener("stockupdate", function(e) {
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console.log(e);
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updateQuote(e.data);
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}, false);
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source.addEventListener("open", function(e) {
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console.log(e);
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}, false);
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source.addEventListener("error", function(e) {
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console.log(e);
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if (e.readyState == EventSource.CLOSED) {
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logMessage("CLOSED");
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}
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}, false);
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} else {
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document.getElementById("notSupported").style.display = "block";
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}
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}
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window.onload = start_updates;
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function updateQuote(data) {
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var stock_data = JSON.parse(data);
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var stock_name = stock_data.stock;
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var stock_value = parseFloat(Math.round(stock_data.value * 100) / 100).toFixed(2);
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var el = document.getElementById("t_" + stock_name);
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var old_stock_value = el.innerHTML;
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el.innerHTML = stock_value;
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if (parseFloat(old_stock_value) < parseFloat(stock_value)) {
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el.style.backgroundColor = "lightgreen";
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} else {
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el.style.backgroundColor = "tomato";
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}
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window.setTimeout(function clearBackground() {
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el.style.backgroundColor = "white";
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}, 500);
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}
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function toggle_updates(){
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if (source){
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source.close();
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source = null;
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} else {
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start_updates();
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}
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}
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</script>
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</head>
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<body>
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<h1>Server Sent Events DelphiMVCFramework Example</h1>
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<div id="notSupported">
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Your browser does not support Server Sent Events. Please use <a href="https://www.mozilla.org/firefox/new/">Firefox</a> or <a href="https://www.google.com/chrome/browser">Google Chrome</a>.
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</div>
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<p class="hint">
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This is a simple Server Sent Events (SSE) example using DelphiMVCFramework that updates stock prices when market moves. Data source is predefined array with titles. These is random delay between 500 msec and 1 sec between each event.
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</p>
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<h2>Quotes</h2>
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<div id="quotes">
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<div class="quote">
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<div class="name">IBM</div>
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<div class="price" id="t_IBM">0</div>
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</div>
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<div class="quote">
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<div class="name">AAPL</div>
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<div class="price" id="t_AAPL">0</div>
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</div>
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<div class="quote">
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<div class="name">GOOG</div>
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<div class="price" id="t_GOOG">0</div>
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</div>
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<div class="quote">
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<div class="name">MSFT</div>
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<div class="price" id="t_MSFT">0</div>
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</div>
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<div class="quote">
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<button onclick="toggle_updates()">Toggle Updates</button>
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</div>
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</div>
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</body>
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</html> |