[Cartoweb-users] Implementing a History

Dirk Jesko ml.dje at geocontent.de
Thu Jan 19 07:16:51 EST 2006


I have been thinking about extending the Location plugin by some history 
functionality. I am now thinking about the best way to do this. My idea 
was to implement it completely on the client side in about the following 

* store the current bbox during initializeResult() in an array in 
locationState and
    - check that the history does not grow beyond a certain size 
(specified in ini-file)
    - check that the same bbox is not stored consecutively
    - some more integrity test and cleaning ...
<http://dict.leo.org/se?lp=ende&p=/Mn4k.&search=consecutive>* add two 
buttons, like the pan- or fullExtent-buttons to the template
* handle the history buttons by issuing BboxLocationRequest

I would like to know, whether this would be a good way to realize a 
history? One problem that I see with this approach is, that the View 
Plugin stores the current history with a view, since (as far as I 
understand it) the plugin stores/loads the whole locationState object. 
Is there a possibility to load/store views without changing the history 
array inside locationState? Maybe store the history independent of the 
locationState object?


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