Equivalent of getBoundsZoomLevel() in gmaps api 3 [duplicate]

Question

In API v2, the map object had a handy method getBoundsZoomLevel(). I used it to get the zoom level which fits the bounds best, then manipulated this optimal zoom level somehow and finally set the desired zoom level.

I cannot find similar function in API v3. (What a continuous frustrating experience when moving from v2 to v3)

Do I really have to use map.fitBounds(), map.getZoom(), manipulate and setZoom() again? That's really stupid!

Answer 1

Below is a function I have implemented:

/** * Returns the zoom level at which the given rectangular region fits in the map view.  * The zoom level is computed for the currently selected map type.  * @param {google.maps.Map} map * @param {google.maps.LatLngBounds} bounds  * @return {Number} zoom level **/ function getZoomByBounds( map, bounds ){   var MAX_ZOOM = map.mapTypes.get( map.getMapTypeId() ).maxZoom || 21 ;   var MIN_ZOOM = map.mapTypes.get( map.getMapTypeId() ).minZoom || 0 ;    var ne= map.getProjection().fromLatLngToPoint( bounds.getNorthEast() );   var sw= map.getProjection().fromLatLngToPoint( bounds.getSouthWest() );     var worldCoordWidth = Math.abs(ne.x-sw.x);   var worldCoordHeight = Math.abs(ne.y-sw.y);    //Fit padding in pixels    var FIT_PAD = 40;    for( var zoom = MAX_ZOOM; zoom >= MIN_ZOOM; --zoom ){        if( worldCoordWidth*(1<<zoom)+2*FIT_PAD < $(map.getDiv()).width() &&            worldCoordHeight*(1<<zoom)+2*FIT_PAD < $(map.getDiv()).height() )           return zoom;   }   return 0; }