[josm-dev] Walking Papers Plugin broken

[Frederik Ramm]

Hi,

    I'm investigating this bug:

http://josm.openstreetmap.de/ticket/3855

The Walking Papers plugin is based on the old Slippy Map plugin, and the 
code that leads to this bug roughly does this:

public void paint(Graphics g, MapView mv) {

LatLon topLeft = mv.getLatLon(0, 0);
LatLon botRight = mv.getLatLon(mv.getWidth(), mv.getHeight());

viewportMinX = lonToTileX(topLeft.lon());
viewportMaxX = lonToTileX(botRight.lon());
viewportMinY = latToTileY(topLeft.lat());
viewportMaxY = latToTileY(botRight.lat());

for (int x = viewportMinX-1; x <= viewportMaxX; x++) {
   for (int y = viewportMinY-1; y <= viewportMaxY; y++) {
     WalkingPapersKey key = new WalkingPapersKey(currentZoomLevel, x, y);

That's where it arrives at ridiculous values like 2147483647 for x and 
-104914 for y.

Before I delve further into this - is this perhaps a consequence of 
Dirk's recent change in the projection stuff? Is there an easy 
workaround, or should I perhaps re-write the whole plugin based on the 
*new* Slippy Map code which (I hear) is totally different?

Bye
Frederik