Package com.treemap

Class SquarifiedAlgorithm

java.lang.Object
com.treemap.AbstractAlgorithm
com.treemap.SquarifiedAlgorithm
All Implemented Interfaces:
Algorithm

public class SquarifiedAlgorithm extends AbstractAlgorithm
Implementation of the Squarified algorithm. It is described in:

Bruls, D.M., C. Huizing, J.J. van Wijk. "Squarified Treemaps". In: W. de Leeuw, R. van Liere (eds.), Data Visualization 2000, Proceedings of the joint Eurographics and IEEE TCVG Symposium on Visualization, 2000, pp. 33-42.

Sub-divids a parent rectangular area into child rectangles. It implements the squaring treemap algorithm where all child nodes are allocated areas proportional to their values, but the aspect ratio of each rectangle is kept as close as possible to a square.

Complexity: O(n), where n is the number of nodes in the tree.

  • Field Details

  • Constructor Details

    • SquarifiedAlgorithm

      public SquarifiedAlgorithm()
  • Method Details

    • getProperties

      public MutableProperties getProperties()
      Description copied from interface: Algorithm
      Properties for storing layout algorithm specific options.
      Specified by:
      getProperties in interface Algorithm
      Overrides:
      getProperties in class AbstractAlgorithm
      Returns:
      the specific properties of this algorithm
    • breadthFirstLayout

      public boolean breadthFirstLayout(com.macrofocus.geom.Shape shape, MutableTreeMapNode parent, MutableTreeMapNode[] children, double sumSize, int horizontalVanishingPoint, int verticalVanishingPoint, TreeMapWorker worker)
      Arrange the items in the given array to fill the given shape. This is called during the first pass, while traversing the tree top down.
      Parameters:
      shape - the current rectangle being divided.
      parent - the parent node.
      children - the items to map.
      sumSize - the size of the parent.
      worker - the worker thread
      Returns:
      true if the layout has been cancelled, false otherwise
    • isCompatible

      public boolean isCompatible(com.macrofocus.geom.Shape shape)
      Description copied from interface: Algorithm
      Indicates whether the layout algorithm can handle the given geometry of its parent
      Parameters:
      shape - the geometry of its parent
      Returns:
      true if it can lay out the children using the specified geometrical shape
    • toString

      public String toString()
      Overrides:
      toString in class Object