[OpenLayers-Users] How to prevent overview map update while overview control is minimized

[Andreas Hocevar]

Hi,

when creating subclasses, don't forget to call the superclass's method
when you override methods, e.g.

minimizeControl: function() {
    // do your custom stuff
    // ...
    // call super
    OpenLayers.Control.OverviewMap.prototype.minimizeControl.apply(this,
arguments);
},

Having said that, a better approach than changing the
isSuitableOverview method would be to unregister and register the
moveend events in maximizeControl/minimizeControl.

And of course, if you accomplish this, a ticket with a patch would be
greatly appreciated, since this sounds like a bug.

Andreas.

On Tue, Jul 5, 2011 at 3:57 PM, Franz Buchinger <fbuchinger at gmail.com> wrote:
> Hi,
>
> as a performance improvement I want to prevent the overview map from
> updating when it is closed. My approach is to redefine the
> isSuitableOverview method when the control is closed or opened. However,
> this doesn't work as expected, as no overview control at all is shown.
>
> Any ideas?
>
> OpenLayers.Control.MyOverviewMap =
> OpenLayers.Class(OpenLayers.Control.OverviewMap, {
>
>     //refresh overview map with every map request
>     isSuitableOverview: function() {
>          return true;
>     },
>    minimizeControl: function (){
>         //do not update overview map when it is minimized
>         this.isSuitableOverview = function (){
>             return true;
>         }
>     },
>     maximizeControl: function (){
>         //update overview map when it is maximized
>         this.isSuitableOverview = function (){
>             return false;
>         }
>     });
>
> Franz
>
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>



-- 
Andreas Hocevar
OpenGeo - http://opengeo.org/
Expert service straight from the developers.