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 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);
}
}
}