// TODO rework zoomToSpan
public void zoomToSpan(final int reqLatSpan, final int reqLonSpan) {
if (reqLatSpan <= 0 || reqLonSpan <= 0) return;
final BoundingBoxE6 bb = this.mOsmv.getVisibleBoundingBoxE6();
final int curZoomLevel = this.mOsmv.getZoomLevel();
final int curLatSpan = bb.getLatitudeSpanE6();
final int curLonSpan = bb.getLongitudeSpanE6();
final float diffNeededLat = (float) reqLatSpan / curLatSpan; // i.e. 600/500 = 1,2
final float diffNeededLon = (float) reqLonSpan / curLonSpan; // i.e. 300/400 = 0,75
final float diffNeeded = Math.max(diffNeededLat, diffNeededLon); // i.e. 1,2
if (diffNeeded > 1) { // Zoom Out
this.mOsmv.setZoomLevel(curZoomLevel - MyMath.getNextSquareNumberAbove(diffNeeded));
} else if (diffNeeded < 0.5) { // Can Zoom in
this.mOsmv.setZoomLevel(curZoomLevel + MyMath.getNextSquareNumberAbove(1 / diffNeeded) - 1);
}
}
public void zoomToSpan(BoundingBoxE6 bb) {
zoomToSpan(bb.getLatitudeSpanE6(), bb.getLongitudeSpanE6());
}