fd768cf170
git-svn-id: http://svn.openlayers.org/trunk/openlayers@10098 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf
71 lines
2.7 KiB
HTML
71 lines
2.7 KiB
HTML
<html xmlns="http://www.w3.org/1999/xhtml">
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<head>
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<title>OpenLayers Restricted Extent 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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<script src="../lib/Firebug/firebug.js"></script>
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<script src="../lib/OpenLayers.js"></script>
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<script type="text/javascript">
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var map = null;
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var extent = new OpenLayers.Bounds(-180, -90, 180, 90);
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function init() {
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var options = {
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restrictedExtent: extent
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}
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map = new OpenLayers.Map('map', options);
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var wms = new OpenLayers.Layer.WMS(
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"OpenLayers WMS",
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"http://labs.metacarta.com/wms/vmap0?",
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{layers: 'basic'}
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);
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map.addLayers([wms]);
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map.setCenter(extent, 1);
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document.getElementById("toggle").checked = true;
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}
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function toggleRestrictedExtent() {
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if(map.restrictedExtent == null) {
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map.setOptions({restrictedExtent: extent});
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} else {
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map.setOptions({restrictedExtent: null});
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}
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}
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</script>
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</head>
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<body onload="init()">
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<h1 id="title">OpenLayers Restricted Extent Example</h1>
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<p id="shortdesc">
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Don't let users drag outside the map extent: instead, limit dragging such
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that the extent of the layer is the maximum viewable area.
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</p>
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<div id="map" class="smallmap"></div>
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<p>
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Map navigation is limited by a combination of map and layer properties.
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The base layer resolutions array controls the resolutions (or zoom
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levels) available. The resolutions can be limited by setting a
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maxResolution property or by explicitly specifying a resolutions
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array.
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</p>
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<p>
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Navigation limited by the maxExtent property. A map cannot be panned
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so that the center of the viewport is outside of the bounds specified
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in maxExtent. If you wish to further restrict panning, use the
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restrictedExtent property. With restrictedExtent set, the map cannot
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be panned beyond the given bounds. If the maxResolution allows the
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map to be zoomed to a resolution that displays an area bigger than
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the restrictedExtent, the viewport will remain centered on the
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restrictedExtent.
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</p>
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<p>
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<input type="checkbox" id="toggle" checked="checked"
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onclick="toggleRestrictedExtent();" />
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<label for="toggle">
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Toggle restricted extent (to [-180, -90, 180, 90]).
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</label>
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</body>
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</html>
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