@Override
public void accept(PainterVisitor visitor, Object group, Bbox bounds, boolean recursive) {
if (googleMap != null) {
String sourceCrs = map.getMapModel().getCrs();
if (isGoogleProjection(sourceCrs)) {
int zoomLevel = calcZoomLevel(map.getMapModel().getMapView().getCurrentScale());
Coordinate latLon = convertToLatLon(bounds.getCenterPoint());
fitGoogleMapBounds(googleMap, latLon, zoomLevel);
} else {
// transform on server
TransformGeometryRequest request = new TransformGeometryRequest();
request.setBounds(
new org.geomajas.geometry.Bbox(
bounds.getX(), bounds.getY(), bounds.getWidth(), bounds.getHeight()));
request.setSourceCrs(map.getMapModel().getCrs());
request.setTargetCrs(EPSG_3857);
GwtCommand command = new GwtCommand(TransformGeometryRequest.COMMAND);
command.setCommandRequest(request);
GwtCommandDispatcher.getInstance()
.execute(
command,
new AbstractCommandCallback<TransformGeometryResponse>() {
public void execute(TransformGeometryResponse response) {
Bbox google = new Bbox(response.getBounds());
int zoomLevel = calcZoomLevelFromBounds(google);
fitGoogleMapBounds(
googleMap, convertToLatLon(google.getCenterPoint()), zoomLevel);
}
});
}
}
}
private void updateTiles(Bbox bounds, final TileFunction<RasterTile> onUpdate) {
Bbox panBounds = worldToPan(bounds);
for (RasterTile tile : tiles.values()) {
if (panBounds.intersects(tile.getBounds())) {
onUpdate.execute(tile);
}
}
}
/** Method based on WmsTileServiceImpl in GWT2 client. */
private List<org.geomajas.layer.tile.RasterTile> calculateTilesForBounds(Bbox bounds) {
List<org.geomajas.layer.tile.RasterTile> tiles =
new ArrayList<org.geomajas.layer.tile.RasterTile>();
if (bounds.getHeight() == 0 || bounds.getWidth() == 0) {
return tiles;
}
return tiles;
}
private void fetchAndUpdateTiles(Bbox bounds, final TileFunction<RasterTile> onUpdate) {
// fetch a bigger area to avoid server requests while panning
tileBounds = bounds.scale(3);
// Calculate tiles
// double scale = lastViewState.getScale();
// addTiles(rasterLayer.getTiles(tileBounds, scale > 1 ? scale : 1 / scale));
addTiles(rasterLayer.getTiles(tileBounds, 1 / lastViewState.getScale()));
Bbox panBounds = worldToPan(bounds);
// for each tile:
for (RasterTile tile : tiles.values()) {
if (panBounds.intersects(tile.getBounds())) {
onUpdate.execute(tile);
}
}
}
private void addTiles(List<org.geomajas.layer.tile.RasterTile> images) {
Matrix t = rasterLayer.getMapModel().getMapView().getWorldToPanTranslation();
Bbox cacheBounds = null;
// flag and reference tile to realign the grid when new tiles come in (transformation shift!)
boolean newTiles = false;
RasterTile referenceTile = null;
for (org.geomajas.layer.tile.RasterTile image : images) {
TileCode code = image.getCode().clone();
if (!tiles.containsKey(code)) {
Bbox panBounds = new Bbox(image.getBounds());
panBounds.translate(Math.round(t.getDx()), Math.round(t.getDy()));
if (cacheBounds == null) {
cacheBounds = panBounds;
} else {
cacheBounds = cacheBounds.union(panBounds);
}
RasterTile tile = new RasterTile(code, panBounds, image.getUrl(), this);
tiles.put(code, tile);
newTiles = true;
referenceTile = tile;
}
}
// This realigns the grid of tiles based on their code
if (newTiles) {
for (RasterTile tile : tiles.values()) {
if (!tile.getCode().equals(referenceTile.getCode())) {
Bbox aligned = new Bbox(referenceTile.getBounds());
aligned.setX(
referenceTile.getBounds().getX()
+ (tile.getCode().getX() - referenceTile.getCode().getX()) * aligned.getWidth());
if (tile.getCode().getY() != referenceTile.getCode().getY()) {
aligned.setY(
referenceTile.getBounds().getY()
+ getOrientedJDiff(referenceTile, tile) * aligned.getHeight());
}
tile.setBounds(aligned);
}
}
}
}
public void applyAndSync(
Bbox bounds, TileFunction<RasterTile> onDelete, TileFunction<RasterTile> onUpdate) {
MapViewState viewState = rasterLayer.getMapModel().getMapView().getViewState();
boolean panning = lastViewState == null || viewState.isPannableFrom(lastViewState);
if (!panning || isDirty()) {
for (RasterTile tile : tiles.values()) {
onDelete.execute(tile);
}
tiles.clear();
tileBounds = null;
dirty = false;
}
lastViewState = rasterLayer.getMapModel().getMapView().getViewState();
if (tileBounds == null || !tileBounds.contains(bounds)) {
fetchAndUpdateTiles(bounds, onUpdate);
} else {
updateTiles(bounds, onUpdate);
}
}
private Bbox convertToLatLon(Bbox bounds) {
// convert corners
Coordinate orig = convertToLatLon(bounds.getOrigin());
Coordinate end = convertToLatLon(bounds.getEndPoint());
return new Bbox(orig.getX(), orig.getY(), end.getX() - orig.getX(), end.getY() - orig.getY());
}
private int calcZoomLevelFromBounds(Bbox google) {
return calcZoomLevel(map.getWidth() / google.getWidth());
}
private Bbox worldToPan(Bbox bounds) {
Matrix t = rasterLayer.getMapModel().getMapView().getWorldToPanTransformation();
return bounds.transform(t);
}
