/**
* Check if a node contains the given point (x,y).
*
* @param elt The node.
* @param x The point abscissa.
* @param y The point ordinate.
* @return True if (x,y) is in the given element.
*/
protected boolean nodeContains(GraphicElement elt, double x, double y) {
Values size = elt.getStyle().getSize();
double w2 = metrics.lengthToPx(size, 0) / 2;
double h2 = size.size() > 1 ? metrics.lengthToPx(size, 1) / 2 : w2;
Point2D.Double src = new Point2D.Double(elt.getX(), elt.getY());
Point2D.Double dst = new Point2D.Double();
Tx.transform(src, dst);
dst.x -= metrics.viewport[0];
dst.y -= metrics.viewport[1];
double x1 = dst.x - w2;
double x2 = dst.x + w2;
double y1 = dst.y - h2;
double y2 = dst.y + h2;
if (x < x1) return false;
if (y < y1) return false;
if (x > x2) return false;
if (y > y2) return false;
return true;
}
