Adding a simple zoom control.
This control generates simple zoom in/out links that can be styled with CSS.
This commit is contained in:
tschaub
35
examples/zoom.html
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35
examples/zoom.html
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<!DOCTYPE html>
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<html>
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
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<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=0">
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<meta name="apple-mobile-web-app-capable" content="yes">
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<title>OpenLayers Zoom Example</title>
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<link rel="stylesheet" href="../theme/default/style.css" type="text/css">
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<link rel="stylesheet" href="style.css" type="text/css">
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<style>
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.olControlAttribution {
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bottom: 5px;
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font-size: 9px;
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}
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</style>
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</head>
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<body>
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<h1 id="title">Zoom Links Example</h1>
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<div id="tags">zoom control</div>
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<div id="shortdesc">Shows how to use a simple zoom control.</div>
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<div id="map" class="smallmap"></div>
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<div id="docs">
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<p>This example demonstrates the use of a Zoom control.</p>
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<p>
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See the <a href="zoom.js" target="_blank">zoom.js</a> source
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for details.
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</p>
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</div>
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<script src="../lib/OpenLayers.js"></script>
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<script src="zoom.js"></script>
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</body>
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</html>
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14
examples/zoom.js
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14
examples/zoom.js
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var map = new OpenLayers.Map({
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div: "map",
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layers: [new OpenLayers.Layer.OSM()],
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controls: [
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new OpenLayers.Control.Navigation({
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dragPanOptions: {
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enableKinetic: true
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}
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}),
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new OpenLayers.Control.Zoom()
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],
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center: [0, 0],
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zoom: 1
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});
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@@ -204,6 +204,7 @@
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"OpenLayers/Control/Graticule.js",
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"OpenLayers/Control/Graticule.js",
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"OpenLayers/Control/TransformFeature.js",
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"OpenLayers/Control/TransformFeature.js",
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"OpenLayers/Control/SLDSelect.js",
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"OpenLayers/Control/SLDSelect.js",
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"OpenLayers/Control/Zoom.js",
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"OpenLayers/Geometry.js",
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"OpenLayers/Geometry.js",
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"OpenLayers/Geometry/Collection.js",
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"OpenLayers/Geometry/Collection.js",
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"OpenLayers/Geometry/Point.js",
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"OpenLayers/Geometry/Point.js",
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140
lib/OpenLayers/Control/Zoom.js
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140
lib/OpenLayers/Control/Zoom.js
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/* Copyright (c) 2006-2012 by OpenLayers Contributors (see authors.txt for
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* full list of contributors). Published under the Clear BSD license.
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* See http://svn.openlayers.org/trunk/openlayers/license.txt for the
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* full text of the license. */
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/**
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* @requires OpenLayers/Control.js
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*/
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/**
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* Class: OpenLayers.Control.Zoom
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* The Zoom control is a pair of +/- links for zooming in and out.
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*
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* Inherits from:
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* - <OpenLayers.Control>
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*/
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OpenLayers.Control.Zoom = OpenLayers.Class(OpenLayers.Control, {
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/**
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* APIProperty: zoomInText
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* {String}
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* Text for zoom-in link. Default is "+".
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*/
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zoomInText: "+",
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/**
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* APIProperty: zoomInId
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* {String}
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* Instead of having the control create a zoom in link, you can provide
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* the identifier for an anchor element already added to the document.
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* By default, an element with id "olZoomInLink" will be searched for
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* and used if it exists.
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*/
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zoomInId: "olZoomInLink",
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/**
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* APIProperty: zoomOutText
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* {String}
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* Text for zoom-out link. Default is "-".
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*/
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zoomOutText: "-",
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/**
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* APIProperty: zoomOutId
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* {String}
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* Instead of having the control create a zoom out link, you can provide
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* the identifier for an anchor element already added to the document.
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* By default, an element with id "olZoomOutLink" will be searched for
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* and used if it exists.
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*/
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zoomOutId: "olZoomOutLink",
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/**
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* Method: draw
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*
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* Returns:
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* {DOMElement} A reference to the DIV DOMElement containing the
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* switcher tabs.
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*/
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draw: function() {
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var div = OpenLayers.Control.prototype.draw.apply(this),
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links = this.getOrCreateLinks(div),
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zoomIn = links.zoomIn,
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zoomOut = links.zoomOut,
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bind = OpenLayers.Function.bind;
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zoomIn.onclick = bind(this.onZoomInClick, this);
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zoomOut.onclick = bind(this.onZoomOutClick, this);
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this.zoomInLink = zoomIn;
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this.zoomOutLink = zoomOut;
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return div;
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},
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/**
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* Method: getOrCreateLinks
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*
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* Parameters:
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* el - {DOMElement}
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*
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* Return:
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* {Object} Object with zoomIn and zoomOut properties referencing links.
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*/
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getOrCreateLinks: function(el) {
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var zoomIn = document.getElementById(this.zoomInId);
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if (!zoomIn) {
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zoomIn = document.createElement("a");
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zoomIn.href = "#zoomIn";
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zoomIn.appendChild(document.createTextNode(this.zoomInText));
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zoomIn.className = "olControlZoomIn";
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el.appendChild(zoomIn);
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}
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var zoomOut = document.getElementById(this.zoomOutId);
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if (!zoomOut) {
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zoomOut = document.createElement("a");
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zoomOut.href = "#zoomOut";
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zoomOut.appendChild(document.createTextNode(this.zoomOutText));
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zoomOut.className = "olControlZoomOut";
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el.appendChild(zoomOut);
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}
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return {
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zoomIn: zoomIn, zoomOut: zoomOut
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};
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},
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/**
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* Method: onZoomInClick
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* Called when zoom-in link is clicked.
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*/
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onZoomInClick: function() {
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this.map.zoomIn();
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return false;
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},
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/**
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* Method: onZoomOutClick
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* Called when zoom-out link is clicked.
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*/
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onZoomOutClick: function() {
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this.map.zoomOut();
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return false;
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},
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/**
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* Method: destroy
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* Clean up.
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*/
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destroy: function() {
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if (this.zoomInLink) {
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delete this.zoomInLink.onclick;
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delete this.zoomInLink;
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}
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if (this.zoomOutLink) {
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delete this.zoomOutLink.onclick;
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delete this.zoomOutLink;
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}
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OpenLayers.Control.prototype.destroy.apply(this);
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},
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CLASS_NAME: "OpenLayers.Control.Zoom"
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});
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background-position: -26px -24px;
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background-position: -26px -24px;
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}
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}
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div.olControlZoom {
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position: absolute;
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top: 8px;
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left: 8px;
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}
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div.olControlZoom a {
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display: block;
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margin: 2px;
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padding: 0 4px;
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color: white;
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font-size: 18px;
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font-family: 'Lucida Grande', Verdana, Geneva, Lucida, Arial, Helvetica, sans-serif;
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font-weight: bold;
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text-decoration: none;
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text-align: center;
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height: 22px;
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line-height: 22px;
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background-color: #4d4d4d; /* fallback for IE */
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background-color: rgba(0, 0, 0, 0.3);
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border: 1px solid rgba(255, 255, 255, 0.6);
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}
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div.olControlZoom a:hover {
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background-color: #7f7f7f; /* fallback for IE */
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background-color: rgba(0, 0, 0, 0.5);
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}
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a.olControlZoomIn {
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border-radius: 5px 5px 0 0;
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}
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a.olControlZoomOut {
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border-radius: 0 0 5px 5px;
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}
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/**
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/**
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* Animations
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* Animations
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*/
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*/
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