/*
* $Id: RectUtils.java,v 1.2 2008/02/28 14:38:48 david Exp $
*
* Copyright (c) 2008 Gaudenz Alder
*
*/
import java.awt.geom.Rectangle2D;
public class RectUtils {
/**
* Unions the pair of source Rectangle2D objects and puts the
* result into the returned Rectangle2D object. This method
* extends the Rectangle2D version by checking for null parameters, the
* returned value will also be null if the two input
* rectangles are null
*
* @param src1
* the first of a pair of Rectangle2D objects to
* be combined with each other
* @param src2
* the second of a pair of Rectangle2D objects to
* be combined with each other
*
*/
public static Rectangle2D union(Rectangle2D src1, Rectangle2D src2) {
Rectangle2D result = null;
if (src1 == null && src2 == null) {
result = null;
} else if (src1 != null && src2 != null) {
double x1 = Math.min(src1.getMinX(), src2.getMinX());
double y1 = Math.min(src1.getMinY(), src2.getMinY());
double x2 = Math.max(src1.getMaxX(), src2.getMaxX());
double y2 = Math.max(src1.getMaxY(), src2.getMaxY());
result = new Rectangle2D.Double();
result.setFrameFromDiagonal(x1, y1, x2, y2);
} else if (src1 != null) {
double x1 = src1.getMinX();
double y1 = src1.getMinY();
double x2 = src1.getMaxX();
double y2 = src1.getMaxY();
result = new Rectangle2D.Double();
result.setFrameFromDiagonal(x1, y1, x2, y2);
} else {
// only src2 is non-null
double x1 = src2.getMinX();
double y1 = src2.getMinY();
double x2 = src2.getMaxX();
double y2 = src2.getMaxY();
result = new Rectangle2D.Double();
result.setFrameFromDiagonal(x1, y1, x2, y2);
}
return result;
}
}