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PlantUML is a component that allows to quickly write diagrams from text.
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package net.sourceforge.plantuml.klimt.geom;
public class PositionableUtils {
// ::remove file when __HAXE__
static private XRectangle2D convert(Positionable positionable) {
final XPoint2D position = positionable.getPosition();
final XDimension2D size = positionable.getSize();
return new XRectangle2D(position.getX(), position.getY(), size.getWidth(), size.getHeight());
}
static public boolean intersect(Positionable big, Positionable small) {
final XRectangle2D bigR = convert(big);
final XRectangle2D smallR = convert(small);
return bigR.intersects(smallR);
}
static public Positionable addMargin(final Positionable pos, final double widthMargin, final double heightMargin) {
return new Positionable() {
public XPoint2D getPosition() {
final XPoint2D p = pos.getPosition();
return new XPoint2D(p.getX() - widthMargin, p.getY() - heightMargin);
}
public XDimension2D getSize() {
return pos.getSize().delta(2 * widthMargin, 2 * heightMargin);
}
public void moveSvek(double deltaX, double deltaY) {
pos.moveSvek(deltaX, deltaY);
}
};
}
static private XPoint2D getCenter(Positionable p) {
final XPoint2D pt = p.getPosition();
final XDimension2D dim = p.getSize();
return new XPoint2D(pt.getX() + dim.getWidth() / 2, pt.getY() + dim.getHeight() / 2);
}
static private Positionable move(Positionable p, double deltaX, double deltaY) {
final XPoint2D pt = p.getPosition();
final XDimension2D dim = p.getSize();
return new PositionableImpl(pt.getX() + deltaX, pt.getY() + deltaY, dim);
}
public static Positionable moveAwayFrom(Positionable fixe, Positionable toMove) {
final XPoint2D centerFixe = getCenter(fixe);
final XPoint2D centerToMove = getCenter(toMove);
// final XPoint2D pt = toMove.getPosition();
// return new PositionableImpl(pt.getX() + 20, pt.getY(),
// toMove.getSize());
final double deltaX = centerToMove.getX() - centerFixe.getX();
final double deltaY = centerToMove.getY() - centerFixe.getY();
double min = 0.0;
if (doesIntersectWithThisCoef(fixe, toMove, deltaX, deltaY, min) == false)
throw new IllegalArgumentException();
double max = 0.1;
while (doesIntersectWithThisCoef(fixe, toMove, deltaX, deltaY, max))
max = max * 2;
for (int i = 0; i < 5; i++) {
assert doesIntersectWithThisCoef(fixe, toMove, deltaX, deltaY, min);
assert doesIntersectWithThisCoef(fixe, toMove, deltaX, deltaY, max) == false;
final double candidat = (min + max) / 2.0;
if (doesIntersectWithThisCoef(fixe, toMove, deltaX, deltaY, candidat))
min = candidat;
else
max = candidat;
// Log.println("min=" + min + " max=" + max);
}
final double candidat = (min + max) / 2.0;
return move(toMove, deltaX * candidat, deltaY * candidat);
}
private static boolean doesIntersectWithThisCoef(Positionable fixe, Positionable toMove, double deltaX,
double deltaY, double c) {
final Positionable result = move(toMove, deltaX * c, deltaY * c);
return intersect(fixe, result);
}
}