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-<!DOCTYPE html>
-<html>
- <head>
- <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
- <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=0">
- <meta name="apple-mobile-web-app-capable" content="yes">
- <title>OpenLayers Restricted Extent Example</title>
- <link rel="stylesheet" href="../theme/default/style.css" type="text/css">
- <link rel="stylesheet" href="style.css" type="text/css">
- <script src="../lib/Firebug/firebug.js"></script>
- <script src="../lib/OpenLayers.js"></script>
- <script type="text/javascript">
- var map = null;
- var extent = new OpenLayers.Bounds(8, 44.5, 19, 50);
-
- function init() {
- var options = {
- restrictedExtent: extent
- };
- map = new OpenLayers.Map('map', options);
-
- var wms = new OpenLayers.Layer.WMS(
- "OpenLayers WMS",
- "http://vmap0.tiles.osgeo.org/wms/vmap0?",
- {layers: 'basic'}
- );
-
- map.addLayers([wms]);
- map.zoomToExtent(extent);
- document.getElementById("toggle").checked = true;
- }
-
- function toggleRestrictedExtent() {
- if(map.restrictedExtent == null) {
- map.setOptions({restrictedExtent: extent});
- } else {
- map.setOptions({restrictedExtent: null});
- }
- }
- </script>
- </head>
- <body onload="init()">
- <h1 id="title">OpenLayers Restricted Extent Example</h1>
- <div id="tags">
- map, restrict, restrictedextent, extent, light
- </div>
- <p id="shortdesc">
- Don't let users drag outside the map extent: instead, limit dragging such
- that the extent of the layer is the maximum viewable area.
- </p>
- <div id="map" class="smallmap"></div>
- <p>
- Map navigation is limited by a combination of map and layer properties.
- The base layer resolutions array controls the resolutions (or zoom
- levels) available. The resolutions can be limited by setting a
- maxResolution property or by explicitly specifying a resolutions
- array.
- </p>
- <p>
- Navigation limited by the maxExtent property. A map cannot be panned
- so that the center of the viewport is outside of the bounds specified
- in maxExtent. If you wish to further restrict panning, use the
- restrictedExtent property. With restrictedExtent set, the map cannot
- be panned beyond the given bounds. If the maxResolution allows the
- map to be zoomed to a resolution that displays an area bigger than
- the restrictedExtent, the viewport will remain centered on the
- restrictedExtent.
- </p>
- <p>
- <input type="checkbox" id="toggle" checked="checked"
- onclick="toggleRestrictedExtent();" />
- <label for="toggle">
- Toggle restricted extent (to [8, 44.5, 19, 50]).
- </label>
-
- </body>
-</html>