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POGoogle Maps API V3: Zoom out breaks pan limitation; workaround?
 

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  1. POGoogle Maps API V3: Zoom out breaks pan limitation; workaround?
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    <pre><code>function initialize() { var latlng = new google.maps.LatLng(37.7702429, -122.4245789); var myOptions = { zoom: 3, center: latlng, disableDefaultUI: false, mapTypeId: google.maps.MapTypeId.TERRAIN, }; var map = new google.maps.Map(document.getElementById("map_canvas"), myOptions); // Limit panning // Latitude bounds for map, longitude not important var southWest = new google.maps.LatLng(-85.000, -122.591); var northEast = new google.maps.LatLng(85.000, -122.333); var allowedBounds = new google.maps.LatLngBounds(southWest, northEast); // Add a move listener to restrict the bounds range google.maps.event.addListener(map, "center_changed", function() {checkBounds(); }); //If zoom out at bound limit then map breaks; center doesn't change but bounds get broken. Listen for zoom event and try to correct bound break. **Doesn't Work** google.maps.event.addListener(map, 'zoom_changed', function() {checkBounds(); }); // If the map position is out of range, move it back function checkBounds() { // Perform the check and return if OK if ((allowedBounds.getNorthEast().lat()&gt;(map.getBounds().getNorthEast().lat()))&amp;&amp;(allowedBounds.getSouthWest().lat()&lt;(map.getBounds().getSouthWest().lat()))) { lastValidCenter = map.getCenter(); lastValidZoom = map.getZoom(); return; } // not valid anymore =&gt; return to last valid position map.panTo(lastValidCenter); map.setZoom(lastValidZoom); } } </code></pre> <p>Basically I don't want the user to be able to see anything outside of the map, so I have restricted the latitudinal bounds. Works normally.</p> <p>The issue is that if a user we to be viewing close to the bound limits and then zooms out so that the center doesn't change, but now the view-port bounds are outside of the bound limit, it does not correct and the map becomes unpannable.</p> <p>Any help you geniuses can offer is mucho appreciated .</p>
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