<!DOCTYPE html>
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<html lang="en">
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<head>
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<meta charset="utf-8">
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<meta http-equiv="x-ua-compatible" content="ie=edge">
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<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
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<title>Viewer.js</title>
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<link rel="stylesheet" href="https://unpkg.com/bootstrap@4/dist/css/bootstrap.min.css" crossorigin="anonymous">
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<link rel="stylesheet" href="../css/viewer.css">
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<style>
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.pictures {
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list-style: none;
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margin: 0;
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max-width: 30rem;
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padding: 0;
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}
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.pictures > li {
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border: 1px solid transparent;
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float: left;
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height: calc(100% / 3);
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margin: 0 -1px -1px 0;
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overflow: hidden;
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width: calc(100% / 3);
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}
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.pictures > li > img {
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cursor: zoom-in;
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width: 100%;
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}
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</style>
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</head>
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<body>
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<div class="container">
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<h1>Moving range limit</h1>
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<div id="galley">
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<ul class="pictures">
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<li><img data-original="../images/tibet-1.jpg" src="../images/thumbnails/tibet-1.jpg" alt="Cuo Na Lake"></li>
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<li><img data-original="../images/tibet-2.jpg" src="../images/thumbnails/tibet-2.jpg" alt="Tibetan Plateau"></li>
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<li><img data-original="../images/tibet-3.jpg" src="../images/thumbnails/tibet-3.jpg" alt="Jokhang Temple"></li>
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<li><img data-original="../images/tibet-4.jpg" src="../images/thumbnails/tibet-4.jpg" alt="Potala Palace 1"></li>
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<li><img data-original="../images/tibet-5.jpg" src="../images/thumbnails/tibet-5.jpg" alt="Potala Palace 2"></li>
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<li><img data-original="../images/tibet-6.jpg" src="../images/thumbnails/tibet-6.jpg" alt="Potala Palace 3"></li>
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<li><img data-original="../images/tibet-7.jpg" src="../images/thumbnails/tibet-7.jpg" alt="Lhasa River"></li>
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<li><img data-original="../images/tibet-8.jpg" src="../images/thumbnails/tibet-8.jpg" alt="Namtso 1"></li>
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<li><img data-original="../images/tibet-9.jpg" src="../images/thumbnails/tibet-9.jpg" alt="Namtso 2"></li>
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</ul>
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</div>
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</div>
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<script src="https://unpkg.com/jquery@3/dist/jquery.slim.min.js" crossorigin="anonymous"></script>
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<script src="https://unpkg.com/bootstrap@4/dist/js/bootstrap.bundle.min.js" crossorigin="anonymous"></script>
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<script src="../js/viewer.js"></script>
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<script>
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window.addEventListener('DOMContentLoaded', function () {
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var galley = document.getElementById('galley');
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var maxOffsetPercentage = 0.9;
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var viewer = new Viewer(galley, {
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url: 'data-original',
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backdrop: 'static',
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move: function (event) {
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var viewerData = viewer.viewerData;
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var imageData = viewer.imageData;
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var maxOffsetHorizontal = viewerData.width * maxOffsetPercentage;
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var maxOffsetVertical = viewerData.height * maxOffsetPercentage;
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var detail = event.detail;
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var left = detail.x;
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var top = detail.y;
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var right = viewerData.width - (left + imageData.width);
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var bottom = viewerData.height - (top + imageData.height);
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if (
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// Move left
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(detail.x < detail.oldX && right > 0 && right > maxOffsetHorizontal)
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// Move right
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|| (detail.x > detail.oldX && left > 0 && left > maxOffsetHorizontal)
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// Move up
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|| (detail.y < detail.oldY && bottom > 0 && bottom > maxOffsetVertical)
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// Move down
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|| (detail.y > detail.oldY && top > 0 && top > maxOffsetVertical)
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) {
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event.preventDefault();
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}
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},
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zoomed: function (event) {
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var detail = event.detail;
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// Zoom out
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if (detail.ratio < detail.oldRatio) {
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var viewerData = viewer.viewerData;
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var imageData = viewer.imageData;
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var maxOffsetHorizontal = viewerData.width * maxOffsetPercentage;
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var maxOffsetVertical = viewerData.height * maxOffsetPercentage;
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var left = imageData.x;
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var top = imageData.y;
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var right = viewerData.width - (left + imageData.width);
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var bottom = viewerData.height - (top + imageData.height);
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var x = 0;
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var y = 0;
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if (right > 0 && right > maxOffsetHorizontal) {
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x = maxOffsetHorizontal - right;
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}
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if (left > 0 && left > maxOffsetHorizontal) {
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x = maxOffsetHorizontal - left;
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}
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if (bottom > 0 && bottom > maxOffsetVertical) {
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y = bottom - maxOffsetVertical;
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}
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if (top > 0 && top > maxOffsetVertical) {
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y = top - maxOffsetVertical;
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}
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// Move the image into view if it is invisible
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if (x !== 0 || y !== 0) {
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viewer.move(x, y);
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}
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}
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},
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});
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});
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</script>
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</body>
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</html>
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