On Thu, Aug 22, 2013 at 4:28 PM, David Purdy <[email protected]>wrote:
> Hi All,****
>
> ** **
>
> I updated my Geotools version from 8.0 to 9.4 and had to change the way I
> was displaying points on a map. My application allows a user to plot
> points to the map continuously. In Geotools 8.0, if user chooses to do
> this, I create a Layer:****
>
> ** **
>
> pointCollection = *new* SimpleFeatureCollection();****
>
> Style style = SLD.*createPointStyle*("circle", selectedColor,
> selectedColor, 1.0f, 3.0f);****
>
> Layer layer = *new* FeatureLayer(pointCollection, style);****
>
> map.layers().add(layerIndex, layer);****
>
> ** **
>
> When a new point comes in the code adds the Point to the "pointCollection"
> above and the map would automatically get refreshed (would see the map
> flicker with the update). Since the upgrade to Geotools 9.4, I needed to
> change the use of SimpleFeatureCollection to a DefaultFeatureCollection.
> When the new Point gets added to that collection the map does not get
> refreshed. So, the point does not appear on the screen until the user
> interacts with the map (like zoom in, zoom out, resize window, etc). Is
> this an expected behavior? Is there some other refresh capability that I
> am missing? Is there another Collection I should be using?
>
I believe that functionality was based on the feature collection events,
which were dropped because
only in memory collections actually implemented them (after several years
they were introduced).
So with the current code you should force the layer to repaint as you
modify the collection contents,
I guess you can have either your own implementation that throws events and
your custom code
that catches them and forces the GUI to repaint
Cheers
Andrea
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