/**
* This method is called on either the first or last node in the connection. Depending on where it
* attaches to the node, the drag point can only be moved in the direction of the attaching side.
*
* @param indexInConnection the index within the connection
* @param node the attached node
* @param diffx the x amount to move
* @param diffy the y amount to move
*/
private void moveConstrained(int indexInConnection, Node node, double diffx, double diffy) {
double amountX = diffx, amountY = diffy;
int mappedIndex = mapToEditPointIndex(indexInConnection);
Point2D p = getConnection().getPoints().get(indexInConnection);
if (p.getX() == node.getAbsoluteX1() || p.getX() == node.getAbsoluteX2()) {
amountX = 0;
}
if (p.getY() == node.getAbsoluteY1() || p.getY() == node.getAbsoluteY2()) {
amountY = 0;
}
editpoints.get(mappedIndex).setLocation(p.getX() + amountX, p.getY() + amountY);
}
/**
* Inserts a new point at the specified position. This is called only if the point previously
* connecting to node was dragged off it.
*
* @param node the Node
* @param outcode the position of the dragged off point, relative to the node
* @param index if 0, the point is added at the start, otherwise at the end
*/
private void insertConnectionPointToNode(Node node, int outcode, int index) {
Point2D newpoint = new Point2D.Double();
Point2D segmentPoint = getConnection().getPoints().get(index);
if (outcode == Rectangle2D.OUT_BOTTOM) {
newpoint.setLocation(segmentPoint.getX(), node.getAbsoluteY2());
addEditPoint(index, newpoint);
} else if (outcode == Rectangle2D.OUT_TOP) {
newpoint.setLocation(segmentPoint.getX(), node.getAbsoluteY1());
addEditPoint(index, newpoint);
} else if (outcode == Rectangle2D.OUT_LEFT) {
newpoint.setLocation(node.getAbsoluteX1(), segmentPoint.getY());
addEditPoint(index, newpoint);
} else if (outcode == Rectangle2D.OUT_RIGHT) {
newpoint.setLocation(node.getAbsoluteX2(), segmentPoint.getY());
addEditPoint(index, newpoint);
}
}
