[OpenLayers-Users] getCenter() in moveend handler problems

[Joao Duarte]

Hi,

That is happening because you're probably modifying what's returned by
map.getCenter(). It's a bug in OL 2.7 that the object returned by
getCenter() is the same the map uses internally. So if you change it, you're
changing the center of the map.

To work you have to clone the result of getCenter() before using it:

var center = map.getCenter().clone();

Now you can use center as you wish.

Regards,

João Duarte,

SAPO Maps,
http://maps.sapo.pt


-----Original Message-----
From: users-bounces at openlayers.org [mailto:users-bounces at openlayers.org] On
Behalf Of brancusi
Sent: segunda-feira, 9 de Fevereiro de 2009 12:20
To: users at openlayers.org
Subject: [OpenLayers-Users] getCenter() in moveend handler problems


Hiya

I've created a moveend listener using;

map.events.register("moveend",null,myeventhandler);

and myeventhandler works fine. BUT if myeventhandler includes the code
map.getCenter() to determine where the user might have dragged to, I find
that as soon as I then try to drag again, the map resets to the position it
was in before the eventhandler was called so you can never actually combine
multiple drags to move around the map.

If I use the navigation up down left right default controls, what happens is
that the map moves (say) left, myeventhandler is called, and then the map
moves back to where it was before the control was hit.

If I remove the call to map.getCenter() then everything performs as
expected.

Does anyone know what the issue with calling getCenter() inside an
eventhandler might be? Is there a better way to find out the current center
of the map after a moveend event?

TIA
brancusi



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