Hi Don,
Thanks for responding to my question. I'm pretty much doing things as you
described below. I have extended OMGraphicHandlerLayer, but all I am doing
in it is changing the traversal mode and setting my own OMGraphicList. I am
not overriding the prepare() method of the layer. The graphic list changes
the traversal mode, doesn't allow duplicates, and overrides the _add method
so that graphics are inserted at different places in the list.
At some later point, OMGraphics are added to the list. Once the graphics
are inserted, a call to doPrepare() is made. (I called the object a
layerHandler in my previous message -- sorry for the confusion.) It is at
this point where I sometimes need to make consecutive calls for the
graphics to be rendered.
I also have two other unrelated questions that I will post in another
message. I don't want to pollute this thread because the questions may be
lost.
Thanks again,
Greg
On Tue, Jun 9, 2009 at 8:30 PM, Don Dietrick <dietrick_at_bbn.com> wrote:
> Hi Greg,
>
> I'm assuming by layer handler you mean layer that extends
> OMGraphicHandlerLayer (just let me know if you mean something else).
> Have you overridden your prepare() method, and how are you loading the list
> into the layer before calling doPrepare?
>
> You probably want to create a new OMGraphicList, add your OMGraphics to it,
> and then call layer.setList(omGraphicList). Then call layer.doPrepare().
>
> Since you are modifying the list outside of the prepare method, it sounds
> like you don't want to modify the list in prepare(). Therefore, you really
> don't need to override the prepare() method at all. By default, it just
> generates the OMGraphicList set on it.
>
> Hope this helps,
>
> - Don
>
>
> Greg Jewell wrote:
>
>> Hello,
>>
>> I am new to OpenMap, so please forgive me if I am missing something
>> fundamental. I am attempting to load a graphic list on the layer handler
>> with potentially many graphics. These graphics may be any combination of
>> vectors and rasters. Sometimes, after I am done loading the list, the call
>> to layerHandler.doPrepare() doesn't display what I just loaded. If I add a
>> second call to doPrepare() immediately after the first, everything seems to
>> be drawn correctly.
>>
>> This looks like a timing issue, but I'm not certain. Any insight would be
>> appreciated.
>>
>> Thanks,
>> Greg
>>
>
>
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Received on Wed Jun 10 2009 - 08:59:22 EDT