org.graffiti.plugins.algorithms.reingoldtilford
Interface ParentPlacementStrategy

public interface ParentPlacementStrategy

Defines an interface for classes that know how to calculate the horizontal placement of Nodes above their children.

To provide a new parent placement, create a class implementing ParentPlacementStrategy

 public class MyParentPlacementStrategy implements ParentPlacementStrategy {
     public double calculateNodeLeft(Tree tree)
     {
         ...
         return ...;
     }
 }
 

and add a new member to the ParentPlacement enumeration.

 enum ParentPlacement
 {
     ...
     CENTER_ABOVE_SUBTREE(new CenterParentAboveSubtree(), "Center above the complete width of its subtree"),
     MY_PARENT_PLACEMENT(new MyParentPlacementStrategy(), "My parent placement"); //<-- Add this line.
     ...
 }
 

Version:

$Revision$ $Date$

Author:

Andreas Gleißner

Method Summary

double

calculateNodeLeft(Tree tree) Calculate the x-coordinate of the root node of tree in the coordinate system of tree.

Method Detail

calculateNodeLeft

double calculateNodeLeft(Tree tree)

Calculate the x-coordinate of the root node of tree in the coordinate system of tree.

Parameters:

tree - the subtree for whose root node the x-coordinate is to be calculated.

Returns:

the x-coordinate of the root node of tree in the coordinate system of tree.