我正在开发基于OpenSeaDragon的图片库,我希望能够在收集模式下使用叠加层。基于OSD网站上的各种示例(http://openseadragon.github.io/),我设法将一个最小的工作示例混合在一起,但是我无法解决几个问题(请参阅https://jsfiddle.net/7ox0hg9L/)。
首先,开/关叠加切换效果正常,但如果我平移/缩放图像,叠加会重新出现,即使切换关闭也会使用parentNode.removeChild()
从DOM中删除元素。
其次,我似乎无法使叠加工具提示在第一页上始终如一地工作,并且它们永远不会出现在以下页面上。 radiobutton标签上的工具提示在任何页面上都能正常工作,所以我不确定为什么叠加上的工具提示不会。
欢迎提出任何建议。请记住,我是javascript的新手。谢谢!
编辑:iangilman在下面的回答和他对jsfiddle的编辑让我重回正轨,并帮助我创建了我想到的画廊。我在这里发布了可能需要类似功能的完整解决方案。谢谢伊恩!
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset='utf-8'>
<script src="https://cdnjs.cloudflare.com/ajax/libs/openseadragon/2.3.1/openseadragon.min.js"></script>
<style>
body {
margin: 0;
color: #333;
font-family: Helvetica, Arial, FreeSans, san-serif;
background-color: #121621;
}
.openseadragon{
width: 800px;
height: 600px;
border: 1px solid black;
color: #333;
background-color: black;
}
.highlight{
opacity: 0.4;
filter: alpha(opacity=40);
outline: 6px auto #0A7EbE;
background-color: white;
}
.highlight:hover, .highlight:focus{
filter: alpha(opacity=70);
opacity: 0.7;
background-color: transparent;
}
.nav {
cursor: pointer;
display: inline-block;
font-size: 25px;
}
.controls {
text-align: center;
display: table;
background-color: #eee;
table-layout: fixed;
width: 800px;
}
</style>
</head>
<body>
<link rel="stylesheet" href="https://code.jquery.com/ui/1.12.1/themes/smoothness/jquery-ui.css">
<script src="https://code.jquery.com/jquery-3.3.1.min.js"></script>
<script src="https://code.jquery.com/ui/1.12.1/jquery-ui.min.js"></script>
<div class="controls">
<label class="labels"><input id="showOverlays" type="checkbox"><a id="selector" title="">Show overlays</a></label>
<a class="nav previous" title="Previous" id="prv"> < </a>
<a class="nav next" title="Next" id="nxt"> > </a>
</div>
<div id="example-runtime-overlay" class="openseadragon" />
<script type="text/javascript">
var tileSource = {
Image: {
xmlns: "http://schemas.microsoft.com/deepzoom/2008",
Url: "http://openseadragon.github.io/example-images/highsmith/highsmith_files/",
Format: "jpg",
Overlap: "2",
TileSize: "256",
Size: {
Height: "9221",
Width: "7026"
}
}
};
var runtimeViewer = OpenSeadragon({
id: "example-runtime-overlay",
prefixUrl: "openseadragon/images/",
showSequenceControl: true,
sequenceMode: true,
nextButton: "nxt",
previousButton: "prv",
tileSources: [{
tileSource: tileSource,
overlay: [{
id: 'example-overlay',
x: 0.43,
y: 0.47,
width: 0.15,
height: 0.20,
className: 'highlight',
caption: 'Nice painting'
}]
},{
tileSource: tileSource,
overlay: [{
id: 'example-overlay',
x: 0.65,
y: 0.05,
width: 0.12,
height: 0.12,
className: 'highlight',
caption: 'Milton'
}]
}]
});
var page = 0;
runtimeViewer.addHandler("page", function (data) {
page = data.page;
});
$('.next').click(function() {
radio.prop('checked', false);
});
$('.previous').click(function() {
radio.prop('checked', false);
});
var radio = $('#showOverlays')
.prop('checked', false)
.change(function() {
if (radio.prop('checked')) {
var overlay = runtimeViewer.tileSources[page].overlay[0];
var elt = document.createElement("div");
elt.id = overlay.id;
elt.className = overlay.className;
elt.title = "";
$(elt).tooltip({
content: overlay.caption
});
runtimeViewer.addOverlay({
element: elt,
location: new OpenSeadragon.Rect(overlay.x, overlay.y, overlay.width, overlay.height)
});
} else {
var overlay = runtimeViewer.tileSources[page].overlay[0];
var element = document.getElementById(overlay.id);
if (element) {
runtimeViewer.removeOverlay(element);
delete element;
}
}
});
$(function() {
$(document).tooltip();
});
</script>
</body>
</html>
答案 0 :(得分:0)
看起来你有个好的开始!
您正在使用addOverlay
正确添加叠加层,因此您需要使用removeOverlay
删除它们:
runtimeViewer.removeOverlay(element);
对于工具提示,遗憾的是OpenSeadragon的事件处理可能会干扰jQuery,因此您必须使用OpenSeadragon MouseTracker:
function bindTooltip(elt) {
new OpenSeadragon.MouseTracker({
element: elt,
enterHandler: function(event) {
// Show tooltip
},
exitHandler: function(event) {
// Hide tooltip
}
}).setTracking(true);
}