/**
* Calculates the span of bounds and returns it in a String. A span is two values which are
* latitude and longitude length between each parts of bounds. Example : -SW.lat = 1 -SW.lng = 10
* -NE.lat = 5 -NE.lng = 50 -> lat span = NE.lat - SW.lat = 5 - 1 = 4 -> lng span = NE.lng -
* SW.lng = 50 - 10 = 40
*
* @return span formated in a string
*/
public String toSpan() {
return new StringBuffer("")
.append(mNe.getLat() - mSw.getLat())
.append(",")
.append(mNe.getLng() - mSw.getLng())
.toString();
}
/**
* Returns if yes or not the given LatLng is contained in bounds.
*
* @param latlng LatLng to test
* @return true if LatLng is contained, false otherwise
*/
public boolean contains(LatLng latlng) {
double lat = latlng.getLat();
double lng = latlng.getLng();
return (lat >= mSw.getLat()
&& lng >= mSw.getLng()
&& lat <= mNe.getLat()
&& lng <= mNe.getLng());
}
/**
* Creates new SW and NE to create union with another entire LatLngBounds.
*
* @param other Other bounds to make union
*/
public void union(LatLngBounds other) {
mSw =
new LatLng(
Math.min(mSw.getLat(), other.getSw().getLat()),
Math.min(mSw.getLng(), other.getSw().getLng()));
mNe =
new LatLng(
Math.max(mNe.getLat(), other.getNe().getLat()),
Math.max(mNe.getLng(), other.getNe().getLng()));
calculateCenter();
}
/**
* Extends bounds to the LatLng passed in parameter, if this one is not contained in bounds.
*
* @param point LatLng to include in bounds
* @return LatLng
*/
public void extend(LatLng point) {
if (!contains(point)) {
mSw =
new LatLng(
Math.min(mSw.getLat(), point.getLat()), Math.min(mSw.getLng(), point.getLng()));
mNe =
new LatLng(
Math.max(mNe.getLat(), point.getLat()), Math.max(mNe.getLng(), point.getLng()));
calculateCenter();
}
}
public FloatLatLng(LatLng ll) {
this.lat = ll.getLat();
this.lng = ll.getLng();
}
@Override
public LatLng calculateMidpoint(LatLng other) {
return new FloatLatLng((lat + other.getLat()) / 2.0, (lng + other.getLng()) / 2.0);
}
/**
* Calculates LatLng SW and NE when center and latSpanE6 and lngSpanE6 are known.
*
* @param latSpan Latitude span between SW lat and NE lat
* @param latSpan Latitude span between SW lng and NE lng
*/
private void calculateBounds(double latSpan, double lngSpan) {
mSw = new LatLng(mCenter.getLat() - latSpan, mCenter.getLng() - lngSpan);
mNe = new LatLng(mCenter.getLat() + latSpan, mCenter.getLng() + lngSpan);
}
/** Calculates LatLng center when SW and NE are known. */
private void calculateCenter() {
double latCenter = (mSw.getLat() + mNe.getLat()) / 2;
double lngCenter = (mSw.getLng() + mNe.getLng()) / 2;
;
mCenter = new LatLng(latCenter, lngCenter);
}
public int getLngSpanE6() {
return (int) (Math.abs(mNe.getLng() - mSw.getLng()) * 1000000);
}
