Add maximum auto zoom option

[GoogleCodeExporter]

I need to be able to specify a maximum zoom when "zoom=auto" is used.  This 
would limit only the initial load, not what the user can zoom manually.

My use for this is for context-sensitive maps.  Readers of my blog will want to 
know where in the world I am generically, not what street I am on.  If a 
particular page of posts includes only one street in one city, I still want a 
larger regional view showing the country/state/etc.

Below is the code I added to my own installation to achieve this in version 
1.3.8.  I just added the new tag, I did not modify the web interface to allow 
setting default values.

Usage for my implementation would be:
[geo_mashup_map map_content="context" zoom="auto" auto_zoom_max="5"]
<?php GeoMashup::map('map_content=contextual&&zoom=auto&auto_zoom_max=5'); ?>

geo-mashup.js-1014-                     if ( this.opts.zoom === 'auto' ) {
geo-mashup.js:1015:                             var 
map_zoom_level,map_max_zoom_level;
geo-mashup.js:1016:                             map_zoom_level     = 
this.map.getBoundsZoomLevel( this.location_bounds );
geo-mashup.js-1017-                             map_max_zoom_level = 
parseInt(this.opts.auto_zoom_max, 10);
geo-mashup.js:1018:                             if (map_zoom_level > 
map_max_zoom_level) {
geo-mashup.js:1019:                                     map_zoom_level = 
map_max_zoom_level;
geo-mashup.js-1020-                             }
geo-mashup.js-1021-                             this.setCenterUpToMaxZoom(
geo-mashup.js-1022-                                     
this.location_bounds.getCenter(),
geo-mashup.js:1023:                                     map_zoom_level,
geo-mashup.js-1024-                                     function() { 
GeoMashup.updateVisibleList(); }
geo-mashup.js-1025-                             );
geo-mashup.js-1026-                     }

Original issue reported on code.google.com by da...@othalan.net on 2 Dec 2010 at 4:06

[GoogleCodeExporter]

That seems reasonable, thanks for the code. 

Just to make it clear, was using zoom="5" not a good option because the auto 
zoom will be less in some scenarios?

Original comment by dylankk...@gmail.com on 3 Dec 2010 at 2:25

• Changed state: Accepted
• Added labels: Type-Enhancement

[GoogleCodeExporter]

You are correct.

Readers of my blog will be interested in "where in the world am I today" which 
will normally involve relatively short distances for each page of posts.  A 
static zoom level works great for this most of the time ... unless posts cover 
a very big distance (perhaps California,USA to Germany, for example).  When 
that does happen I want the zoom level to automatically show the wider region 
so reader get an overview of where I am talking about.

BTW, brilliant plugin!

Original comment by da...@othalan.net on 3 Dec 2010 at 2:38

[GoogleCodeExporter]

This issue was updated by revision r817.

The parameter should continue to work in 1.4, although not with google v3. 
That API may require more work due to a delay in the availability of the 
calculated auto zoom level.

Original comment by dylankk...@gmail.com on 23 Dec 2010 at 7:30

• Changed state: Implemented
• Added labels: Milestone-1.4

[GoogleCodeExporter]

Original comment by dylankk...@gmail.com on 12 Jul 2011 at 1:48

• Changed state: Released