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Add a custom controls example

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Inspired from @cedricmoullet's ZoomExtent example in 3312c37ed0.
This commit is contained in:
Éric Lemoine
2013-03-28 14:06:15 +01:00
parent 9685c87bc9
commit 4e51888651
2 changed files with 203 additions and 0 deletions
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<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="chrome=1">
<meta name="viewport" content="initial-scale=1.0, user-scalable=no, width=device-width">
<link rel="stylesheet" href="../resources/bootstrap/css/bootstrap.min.css" type="text/css">
<link rel="stylesheet" href="../resources/layout.css" type="text/css">
<link rel="stylesheet" href="../resources/bootstrap/css/bootstrap-responsive.min.css" type="text/css">
<style type="text/css">
.zoom-extent {
position: absolute;
top: 65px;
left: 8px;
background: rgba(255,255,255,0.4);
border-radius: 4px;
padding: 2px;
}
.zoom-extent a {
display: block;
margin: 1px;
padding: 0;
color: white;
font-size: 18px;
font-family: 'Lucida Grande',Verdana,Geneva,Lucida,Arial,Helvetica,sans-serif;
font-weight: bold;
text-decoration: none;
text-align: center;
height: 22px;
width: 22px;
line-height: 19px;
background: rgba(0,60,136,0.5);
}
.zoom-extent a:hover {
background: rgba(0,60,136,0.7);
}
.zoom-to {
border-radius: 2px 2px 0 0;
}
.zoom-to:before {
content: "E";
}
</style>
<title>ol3 custom controls example</title>
</head>
<body>
<div class="navbar navbar-inverse navbar-fixed-top">
<div class="navbar-inner">
<div class="container">
<a class="brand" href="./">OpenLayers 3 Examples</a>
<ul class="nav pull-right">
<li><iframe class="github-watch-button" src="http://ghbtns.com/github-btn.html?user=openlayers&repo=ol3&type=watch&count=true"
allowtransparency="true" frameborder="0" scrolling="0" height="20" width="90"></iframe></li>
<li><a href="https://twitter.com/share" class="twitter-share-button" data-count="none" data-hashtags="openlayers">&nbsp;</a></li>
<li><div class="g-plusone-wrapper"><div class="g-plusone" data-size="medium" data-annotation="none"></div></div></li>
</ul>
</div>
</div>
</div>
<div class="container-fluid">
<div class="row-fluid">
<div class="span12">
<div id="map" class="map"></div>
</div>
</div>
<div class="row-fluid">
<div class="span4">
<h4 id="title">Custom controls</h4>
<p id="shortdesc">This example shows how to create custom controls.</p>
<div id="docs">
<p>
This example creates a "zoom to extent" button.
See the <a href="custom-controls.js" target="_blank">custom-controls.js
source</a> to see how this is done.
Per default, the zoom extent control use the map projection extent.
</p>
</div>
<div id="tags">
custom, control
</div>
</div>
</div>
</div>
<script src="loader.js?id=custom-controls" type="text/javascript"></script>
<script src="../resources/social-links.js" type="text/javascript"></script>
</body>
</html>

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goog.require('ol');
goog.require('ol.Map');
goog.require('ol.RendererHints');
goog.require('ol.View2D');
goog.require('ol.control.Control');
goog.require('ol.control.defaults');
goog.require('ol.layer.TileLayer');
goog.require('ol.source.OSM');
/**
* Define a namespace for the application.
*/
window.app = {};
var app = window.app;
//
// Define zoom extent control.
//
/**
* @constructor
* @extends {ol.control.Control}
* @param {Object=} opt_options Control options.
*/
app.ZoomExtentControl = function(opt_options) {
var options = opt_options || {};
this.extent_ = options.extent;
var anchor = document.createElement('a');
anchor.href = '#zoom-to';
anchor.className = 'zoom-to';
var this_ = this;
var handleZoomTo = function(e) {
this_.handleZoomTo(e);
};
anchor.addEventListener('click', handleZoomTo, false);
anchor.addEventListener('touchstart', handleZoomTo, false);
var element = document.createElement('div');
element.className = 'zoom-extent ol-unselectable';
element.appendChild(anchor);
ol.control.Control.call(this, {
element: element,
map: options.map,
target: options.target
});
};
ol.inherits(app.ZoomExtentControl, ol.control.Control);
/**
* @param {Event} e Browser event.
*/
app.ZoomExtentControl.prototype.handleZoomTo = function(e) {
// prevent #zoomTo anchor from getting appended to the url
e.preventDefault();
var map = this.getMap();
var view = map.getView();
view.fitExtent(this.extent_, map.getSize());
};
/**
* Overload setMap to use the view projection's validity extent
* if no extent was passed to the constructor.
* @param {ol.Map} map Map.
*/
app.ZoomExtentControl.prototype.setMap = function(map) {
ol.control.Control.prototype.setMap.call(this, map);
if (map && !this.extent_) {
this.extent_ = map.getView().getProjection().getExtent();
}
};
//
// Create map, giving it a zoom extent control.
//
var map = new ol.Map({
controls: ol.control.defaults({}, [
new app.ZoomExtentControl({
extent: [813079.7791264898, 848966.9639063801,
5929220.284081122, 5936863.986909639]
})
]),
layers: [
new ol.layer.TileLayer({
source: new ol.source.OSM()
})
],
renderers: ol.RendererHints.createFromQueryData(),
target: 'map',
view: new ol.View2D({
center: [0, 0],
zoom: 2
})
});