335 lines
9.1 KiB
HTML
335 lines
9.1 KiB
HTML
<!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="chrome=1">
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<meta name="viewport" content="initial-scale=1.0, user-scalable=no, width=device-width">
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<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/font-awesome/4.4.0/css/font-awesome.min.css" type="text/css">
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<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/css/bootstrap.min.css" type="text/css">
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<link rel="stylesheet" href="./resources/prism/prism.css" type="text/css">
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<link rel="stylesheet" href="../css/ol.css" type="text/css">
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<link rel="stylesheet" href="./resources/layout.css" type="text/css">
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<link rel="stylesheet" href="image-load-events.css">
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<script src="./resources/zeroclipboard/ZeroClipboard.min.js"></script>
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<title>Image load events example</title>
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</head>
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<body>
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<header class="navbar" role="navigation">
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<div class="container" id="navbar-inner-container">
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<a class="navbar-brand" href="./"><img src="./resources/logo-70x70.png"> OpenLayers 3 Examples</a>
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</div>
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</header>
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<div class="container-fluid">
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<div class="row-fluid">
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<div class="span12 wrapper">
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<div id="map" class="map"></div>
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<div id="progress"></div>
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</div>
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</div>
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<div class="row-fluid">
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<div class="span12">
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<h4 id="title">Image load events example</h4>
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<p id="shortdesc">Example using image load events.</p>
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<div id="docs"><p>Image sources fire events related to image loading. You can listen for <code>imageloadstart</code>, <code>imageloadend</code>, and <code>imageloaderror</code> type events to monitor image loading progress. This example registers listeners for these events and renders an image loading progress bar at the bottom of the map.</p>
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</div>
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<div id="tags">image, events, loading</div>
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<div id="api-links">Related API documentation: <ul class="inline"><li><a href="../apidoc/ol.Map.html" title="API documentation for ol.Map">ol.Map</a></li>,<li><a href="../apidoc/ol.View.html" title="API documentation for ol.View">ol.View</a></li>,<li><a href="../apidoc/ol.layer.Image.html" title="API documentation for ol.layer.Image">ol.layer.Image</a></li>,<li><a href="../apidoc/ol.source.ImageWMS.html" title="API documentation for ol.source.ImageWMS">ol.source.ImageWMS</a></li></ul></div>
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</div>
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</div>
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<div class="row-fluid">
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<div id="source-controls">
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<a id="copy-button"><i class="fa fa-clipboard"></i> Copy</a>
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<a id="jsfiddle-button"><i class="fa fa-jsfiddle"></i> Edit</a>
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</div>
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<form method="POST" id="jsfiddle-form" target="_blank" action="http://jsfiddle.net/api/post/jquery/1.11.0/">
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<textarea class="hidden" name="js">/**
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* Renders a progress bar.
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* @param {Element} el The target element.
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* @constructor
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*/
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function Progress(el) {
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this.el = el;
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this.loading = 0;
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this.loaded = 0;
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}
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/**
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* Increment the count of loading tiles.
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*/
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Progress.prototype.addLoading = function() {
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if (this.loading === 0) {
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this.show();
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}
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++this.loading;
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this.update();
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};
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/**
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* Increment the count of loaded tiles.
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*/
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Progress.prototype.addLoaded = function() {
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var this_ = this;
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setTimeout(function() {
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++this_.loaded;
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this_.update();
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}, 100);
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};
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/**
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* Update the progress bar.
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*/
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Progress.prototype.update = function() {
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var width = (this.loaded / this.loading * 100).toFixed(1) + '%';
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this.el.style.width = width;
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if (this.loading === this.loaded) {
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this.loading = 0;
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this.loaded = 0;
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var this_ = this;
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setTimeout(function() {
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this_.hide();
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}, 500);
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}
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};
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/**
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* Show the progress bar.
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*/
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Progress.prototype.show = function() {
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this.el.style.visibility = 'visible';
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};
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/**
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* Hide the progress bar.
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*/
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Progress.prototype.hide = function() {
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if (this.loading === this.loaded) {
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this.el.style.visibility = 'hidden';
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this.el.style.width = 0;
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}
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};
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var progress = new Progress(document.getElementById('progress'));
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var source = new ol.source.ImageWMS({
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url: 'http://demo.boundlessgeo.com/geoserver/wms',
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params: {'LAYERS': 'topp:states'},
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serverType: 'geoserver'
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});
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source.on('imageloadstart', function(event) {
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progress.addLoading();
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});
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source.on('imageloadend', function(event) {
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progress.addLoaded();
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});
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source.on('imageloaderror', function(event) {
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progress.addLoaded();
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});
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var map = new ol.Map({
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logo: false,
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layers: [
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new ol.layer.Image({source: source})
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],
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target: 'map',
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view: new ol.View({
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center: [-10997148, 4569099],
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zoom: 4
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})
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});
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</textarea>
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<textarea class="hidden" name="css">.map {
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background: #E0ECED;
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}
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.wrapper {
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position: relative;
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}
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#progress {
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position: absolute;
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bottom: 0;
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left: 0;
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height: 2px;
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background: rgba(0, 60, 136, 0.4);
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width: 0;
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transition: width 250ms;
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}</textarea>
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<textarea class="hidden" name="html"><div class="row-fluid">
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<div class="span12 wrapper">
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<div id="map" class="map"></div>
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<div id="progress"></div>
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</div>
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</div>
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</textarea>
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<input type="hidden" name="wrap" value="l">
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<input type="hidden" name="resources" value="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.4/css/bootstrap.min.css,https://maxcdn.bootstrapcdn.com/bootstrap/3.3.4/js/bootstrap.min.js,http://openlayers.org/en/v3.9.0/css/ol.css,http://openlayers.org/en/v3.9.0/build/ol.js">
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</form>
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<pre><code id="example-source" class="language-markup"><!DOCTYPE html>
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<html>
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<head>
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<title>Image load events example</title>
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<script src="https://code.jquery.com/jquery-1.11.2.min.js"></script>
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<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/css/bootstrap.min.css">
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<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/js/bootstrap.min.js"></script>
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<link rel="stylesheet" href="http://openlayers.org/en/v3.9.0/css/ol.css" type="text/css">
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<script src="http://openlayers.org/en/v3.9.0/build/ol.js"></script>
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<style>
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.map {
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background: #E0ECED;
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}
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.wrapper {
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position: relative;
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}
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#progress {
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position: absolute;
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bottom: 0;
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left: 0;
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height: 2px;
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background: rgba(0, 60, 136, 0.4);
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width: 0;
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transition: width 250ms;
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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-fluid">
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<div class="row-fluid">
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<div class="span12 wrapper">
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<div id="map" class="map"></div>
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<div id="progress"></div>
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</div>
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</div>
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</div>
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<script>
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/**
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* Renders a progress bar.
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* @param {Element} el The target element.
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* @constructor
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*/
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function Progress(el) {
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this.el = el;
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this.loading = 0;
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this.loaded = 0;
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}
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/**
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* Increment the count of loading tiles.
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*/
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Progress.prototype.addLoading = function() {
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if (this.loading === 0) {
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this.show();
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}
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++this.loading;
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this.update();
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};
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/**
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* Increment the count of loaded tiles.
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*/
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Progress.prototype.addLoaded = function() {
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var this_ = this;
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setTimeout(function() {
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++this_.loaded;
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this_.update();
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}, 100);
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};
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/**
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* Update the progress bar.
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*/
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Progress.prototype.update = function() {
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var width = (this.loaded / this.loading * 100).toFixed(1) + '%';
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this.el.style.width = width;
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if (this.loading === this.loaded) {
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this.loading = 0;
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this.loaded = 0;
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var this_ = this;
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setTimeout(function() {
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this_.hide();
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}, 500);
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}
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};
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/**
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* Show the progress bar.
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*/
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Progress.prototype.show = function() {
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this.el.style.visibility = 'visible';
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};
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/**
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* Hide the progress bar.
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*/
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Progress.prototype.hide = function() {
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if (this.loading === this.loaded) {
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this.el.style.visibility = 'hidden';
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this.el.style.width = 0;
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}
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};
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var progress = new Progress(document.getElementById('progress'));
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var source = new ol.source.ImageWMS({
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url: 'http://demo.boundlessgeo.com/geoserver/wms',
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params: {'LAYERS': 'topp:states'},
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serverType: 'geoserver'
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});
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source.on('imageloadstart', function(event) {
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progress.addLoading();
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});
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source.on('imageloadend', function(event) {
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progress.addLoaded();
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});
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source.on('imageloaderror', function(event) {
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progress.addLoaded();
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});
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var map = new ol.Map({
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logo: false,
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layers: [
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new ol.layer.Image({source: source})
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],
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target: 'map',
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view: new ol.View({
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center: [-10997148, 4569099],
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zoom: 4
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})
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});
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</script>
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</body>
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</html></code></pre>
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</div>
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</div>
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<script src="https://code.jquery.com/jquery-1.11.2.min.js"></script>
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<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/js/bootstrap.min.js"></script>
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<script src="./resources/common.js"></script>
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<script src="./resources/prism/prism.min.js"></script>
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<script src="loader.js?id=image-load-events"></script>
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</body>
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</html>
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