Re: [udig-devel] Delaying map refresh

[Jody Garnett <jody.garnett@xxxxxxxxx>]

I have a different answer than Jesse (which may mean I am wrong - heh). 
I would make a CompositeCommand that does all the work you want to in 
one go ... the map will only have a chance to respond when the composite 
command is finished its work.

This is the point where Jesse either says "you are wrong jody" or "that 
is a good idea".

Jody

Ugo Taddei wrote:
> Hello,
>
> we have built a widget that replaces some of the functionality 
> provided by the LayersView. It's basically a combo box with the 
> current layers, and which sets the visibility for all layers to be 
> false, except the one chosen by the combo. Furthermore, on selecting, 
> the map should zoom to the layer's bbox. Like this (in pseudo):
>
> 1) User selects layer on combo?
> 2) for each layer
>   if layer is not selected layer -> setVisible( false )
>   else setVisible( true )
>
> map refreshes here!
>
> 3) map.setBbox( selectedLayer.getBbox() )
>
> map refreshes again!
>
> This all works fine. However, there are two events (or more) being 
> triggered: layer visibility (implies a map refresh), jump to bbox 
> (another map refresh).
>
> Is there a way to temporarily disable map refresh? As in
>
> 1) map.setFiringEvents( false );
> 2) Turn layers' visibility on/off
> 3) map.setBbox( selectedLayer.getBbox() )
> 4) map.setFiringEvents( true );
> 5) map.refresh()
>
> Thanks in advance,
>
> Ugo