private void setKeepRect(final Rect keepRect) {
// Drop tiles outside the new keepRect.
RectF keepRectF = keepRect.toRectF();
List<Coordinate> toRemove = new ArrayList<Coordinate>();
;
Iterator<Entry<Coordinate, ITile>> it = mMainTiles.iterator();
while (it.hasNext()) {
Entry<Coordinate, ITile> entry = it.next();
Coordinate coordinate = entry.getValue().coordinate();
RectF tileRect = entry.getValue().rect().toRectF();
if (!tileRect.intersectsWith(keepRectF)) toRemove.add(coordinate);
}
int removeCount = toRemove.size();
for (int n = 0; n < removeCount; ++n) removeTile(toRemove.get(n));
keepRect.copyTo(mKeepRect);
}
