On Sat, Jan 16, 2010 at 07:37:01PM +0100, Felix Hartmann wrote:
> Hi, would it be possible to integrate an overlays file for POIs? The
> current overlays file (inside the style-file) only works for polylines.
> I would like to do the same for POIs. (I don't think it is needed for
> polygons, but maybe someone has creative ideas in his head and would
> like to have it for polygons too).
>
> I don't manage to program this, but I hope that it proves easy as we
> already have that functionality for lines. Would be great if it could be
> integrated. I tried to do it by using "continue" but this does not work.
> (continue will only work if the key or value is different).
Could the "continue" action be made to work? Such rules might be easier
to follow than overlay definitions, but I guess it is a matter of taste.
As far as I can tell from the source code, the following pieces of code
implement the line overlays:
StyleImpl.getOverlays(LineAdder)
* called by StyledConverter constructor
* wraps calls to the passed LineAdder.addLine() by OverlayReader.addLine()
* the passed LineAdder would be this one defined in StyledConverter:
private LineAdder lineAdder = new LineAdder() {
public void add(MapLine element) {
if (element instanceof MapRoad)
collector.addRoad((MapRoad) element);
else
collector.addLine(element);
}
};
You would have to implement something similar around StyledConverter.addPoint()
or StyledConverter.collector.addPoint().
I find your example use case of symbols for public transportation stops
extremely useful. I hope that someone will make this happen. Sorry,
there are only so many hours in my days, and the top priority on my "roadmap"
is to create multi-layered maps.
By the way, house numbers and bike route numbers could be useful to put on
user-selectable map layers. Couldn't you actually create the numbers as
text labels? Could the addresslayer_style of
http://wiki.openstreetmap.org/wiki/DE:All_in_one_Garmin_Map
be doing exactly that?
Best regards,
Marko
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