infovis.tree.visualization.treemap
Class Treemap

java.lang.Object
  infovis.tree.visualization.treemap.Treemap

All Implemented Interfaces:

Layout

Direct Known Subclasses:

SliceAndDice, Squarified

public abstract class Treemap
extends Object
implements Layout

Base class for all Treemap algorithms.

Version:

$Revision: 1.23 $

Author:

Jean-Daniel Fekete

Constructor Summary

Treemap()

Method Summary

boolean	beginBox(Rectangle2D.Float box) Checks whether the specified box should be drawn and initialize the node's Shape to its final bounds.
GeneralPath	borderShape(float xmin, float ymin, float xmax, float ymax, int node) Computes the shape of the border.
abstract void	computeShapes(Rectangle2D bounds, TreemapVisualization vis) Computes the shapes of the treemap.
void	computeShapes(Rectangle2D bounds, Visualization vis) Computes the layout.
void	finish() Method start should be called before starting to draw shapes.
Dimension	getPreferredSize(Visualization vis) Computes and return the preferred size for this layout and this visualization.
void	invalidate(Visualization vis) Invalidate the cached state of the layout.
void	removeBorder(Rectangle2D.Float box, int node) Method removeBorder only removes the border from the given box.
void	start() Method start should be called before starting to draw shapes.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface infovis.visualization.Layout

getName

Constructor Detail

Treemap

public Treemap()

Method Detail

start

public void start()

Method start should be called before starting to draw shapes.

finish

public void finish()

Method start should be called before starting to draw shapes.

beginBox

public boolean beginBox(Rectangle2D.Float box)

Checks whether the specified box should be drawn and initialize the node's Shape to its final bounds.

Parameters:

box - the bounding box

Returns:

true if the treemap algorithm should continue to go deeper, false otherwise.

removeBorder

public void removeBorder(Rectangle2D.Float box,
                         int node)

Method removeBorder only removes the border from the given box.

Parameters:

box - the rectangle containing the box whose border should be drawn. It is modified by the method and will hold the remaining part of the box after the border is drawn.

node - the tree node to draw.

borderShape

public GeneralPath borderShape(float xmin,
                               float ymin,
                               float xmax,
                               float ymax,
                               int node)

Computes the shape of the border.

Parameters:

xmin - left coord

ymin - upper coord

xmax - right coord

ymax - lower coord

node - the node

Returns:

a shape for the border

computeShapes

public void computeShapes(Rectangle2D bounds,
                          Visualization vis)

Computes the layout.

Specified by:

computeShapes in interface Layout

Parameters:

bounds - the allocated bounds of the visualization.

vis - the visualization.

invalidate

public void invalidate(Visualization vis)

Invalidate the cached state of the layout.

Call this method from the visualization when it gets invalidated.

Specified by:

invalidate in interface Layout

Parameters:

vis - the visualization.

getPreferredSize

public Dimension getPreferredSize(Visualization vis)

Computes and return the preferred size for this layout and this visualization.

Specified by:

getPreferredSize in interface Layout

Parameters:

vis - the visualization

Returns:

the preferred size for this layout and this visualization.

computeShapes

public abstract void computeShapes(Rectangle2D bounds,
                                   TreemapVisualization vis)

Computes the shapes of the treemap.

Parameters:

vis - the TreemapVisualization

bounds - the external bounds of the treemap.