<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>OpenSeadragon Filtering Plugin Demo</title>
<script type="text/javascript" src='/build/openseadragon/openseadragon.js'></script>
<style>
textarea {
width: 900px;
padding: 10px;
font-size: 16px;
font-family: 'Courier New', Courier, monospace;
border: 1px solid #ccc;
border-radius: 5px;
box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
background-color: #fff;
resize: vertical;
display: block;
max-width: 90%;
}
button {
margin-top: 10px;
padding: 10px 20px;
font-size: 16px;
color: #fff;
background-color: #007bff;
border: none;
border-radius: 5px;
cursor: pointer;
box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}
button:hover {
background-color: #0056b3;
display: block;
}
</style>
<script>
let _pA, _pB;
function executeScript() {
const scriptContent = document.getElementById("scriptInput").value;
try {
eval(scriptContent);
if (! (typeof window.pluginA === "function") || ! (typeof window.pluginB === "function")) {
alert("pluginA and pluginB functions must be defined!");
return;
}
if (_pA) {
viewer.removeHandler('tile-invalidated', _pA);
}
if (_pB) {
viewer.removeHandler('tile-invalidated', _pB);
}
_pA = window.pluginA;
_pB = window.pluginB;
viewer.addHandler('tile-invalidated', _pA, null, window.orderPluginA || 0);
viewer.addHandler('tile-invalidated', _pB, null, window.orderPluginB || 0);
viewer.requestInvalidate();
} catch (error) {
alert("Error executing script: " + error.message);
}
}
</script>
<!-- JQuery -->
<script src="/test/lib/jquery-1.9.1.min.js"></script>
<link rel="stylesheet" href="/test/lib/jquery-ui-1.10.2/css/smoothness/jquery-ui-1.10.2.min.css">
<script src="/test/lib/jquery-ui-1.10.2/js/jquery-ui-1.10.2.min.js"></script>
</head>
<body>
<section class="home home-title" id="title-banner">
<h1>OpenSeadragon plugin demo</h1>
<p>You should see two plugins interacting. You can change the order of plugins and the logics!</p>
</section>
<div style="display: flex; flex-direction: row; flex-wrap: wrap;">
<section class="demo" id="demo" style="width: 800px; height: 600px"></section>
<div>
<textarea id="scriptInput" rows="25" cols="120" placeholder="" style="height: 470px">
// window.pluginA must be defined! draw small gradient square
window.pluginA = async function(e) {
const ctx = await e.getData('context2d');
if (ctx) {
const gradient = ctx.createLinearGradient(0, 0, 50, 50);
gradient.addColorStop(0, 'blue');
gradient.addColorStop(0.5, 'green');
gradient.addColorStop(1, 'red');
ctx.fillStyle = gradient;
ctx.fillRect(0, 0, 50, 50);
await e.setData(ctx, 'context2d');
}
};
// window.pluginB must be defined! overlay with color opacity 40%
window.pluginB = async function(e) {
const ctx = await e.getData('context2d');
if (ctx) {
const canvas = ctx.canvas;
ctx.fillStyle = "rgba(156, 0, 26, 0.4)";
ctx.fillRect(0, 0, canvas.width, canvas.height);
await e.setData(ctx, 'context2d');
}
};
// higher number = earlier execution
window.orderPluginA = 1;
window.orderPluginB = 0;
</textarea>
<textarea style="height: 120px; background-color: #e5e5e5" disabled>
// Application of the plugins done automatically:
viewer.addHandler('tile-invalidated', window.pluginA, null, window.orderPluginA);
viewer.addHandler('tile-invalidated', window.pluginB, null, window.orderPluginB);
viewer.requestInvalidate();
</textarea>
<button onclick="executeScript()">Apply</button>
</div>
</div>
<script>
const viewer = window.viewer = OpenSeadragon({
id: "demo",
prefixUrl: "../../build/openseadragon/images/",
tileSources: "https://openseadragon.github.io/example-images/duomo/duomo.dzi",
drawer: 'webgl',
crossOriginPolicy: 'Anonymous',
wrapHorizontal: true,
showNavigator: true,
});
</script>
</body>
</html>