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    copied!<p>I've had this issue as well. The problem is jQuery Mobile's page layout interferes with the size calculations of the OpenLayers.Map object. What you have is a viewer that is full width, but zero height.</p> <p>Here's what we did (most of this code was adapted from the <a href="http://openlayers.org/dev/examples/mobile-jq.html" rel="nofollow">JQuery Mobile example</a>)</p> <p>Firstly, override the OpenLayers.Map.getCurrentSize() function:</p> <pre><code>OpenLayers.Map.prototype.getCurrentSize = function() { var mapDiv = $(this.div); return new OpenLayers.Size(mapDiv.width(), mapDiv.height()); }; </code></pre> <p>Secondly, we structured the JQM page like so:</p> <pre><code>&lt;div data-role="page"&gt; &lt;div data-role="header"&gt; &lt;h3&gt;Map Viewer&lt;/h3&gt; &lt;/div&gt; &lt;div data-role="content" id="viewerContainer"&gt; &lt;div id="viewer"&gt; &lt;/div&gt; &lt;/div&gt; &lt;div data-role="footer"&gt; &lt;h3&gt;My footer&lt;/h3&gt; &lt;/div&gt; &lt;/div&gt; </code></pre> <p>Then we put in a functions to prep the correct container height for the OpenLayers map and to ensure the correct height afterwards</p> <pre><code>function fixContentHeight(olMap) { var footer = $("div[data-role='footer']:visible"), content = $("div[data-role='content']:visible:visible"), viewHeight = $(window).height(), contentHeight = viewHeight - footer.outerHeight(); if ((content.outerHeight() + footer.outerHeight()) !== viewHeight) { contentHeight -= (content.outerHeight() - content.height() + 1); content.height(contentHeight); } content.width($(window).width()); olMap.updateSize(); } function ensureNonZeroHeight(containerid) { var footer = $("div[id='" + containerid + "'] &gt; div[data-role='footer']"), header = $("div[id='" + containerid + "'] &gt; div[data-role='header']"), content = $("div[id='" + containerid + "'] &gt; div[data-role='content']"), viewHeight = $(window).height(), contentHeight = viewHeight - footer.outerHeight() - header.outerHeight(); if ((content.outerHeight() + footer.outerHeight() + header.outerHeight()) !== viewHeight) { contentHeight -= (content.outerHeight() - content.height() + 1); content.height(contentHeight); content.width($(window).width()); } } </code></pre> <p>Then finally, the OpenLayers.Map is set up like so:</p> <pre><code>ensureNonZeroHeight("viewerContainer"); var map = new OpenLayers.Map("viewer", { /* other options */ }); /* Other map initialization code */ fixContentHeight(map); </code></pre> <p>And ensure that fixContentHeight() is called whenever this page is presented.</p>
 

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