y.layout.hierarchic
Class TreeDrawer.HierarchicTreePlacer

java.lang.Object
  y.layout.tree.AbstractNodePlacer
      y.layout.hierarchic.TreeDrawer.HierarchicTreePlacer

All Implemented Interfaces:

java.lang.Cloneable, NodePlacer

Enclosing class:

TreeDrawer

public static class TreeDrawer.HierarchicTreePlacer
extends AbstractNodePlacer

This class places nodes on their given layers (does not change the y-coordinates) if the layout style of the hierarchic layout algorithm is set to HierarchicLayouter.TREE.

Field Summary

Fields inherited from class y.layout.tree.AbstractNodePlacer

graph

Fields inherited from interface y.layout.tree.NodePlacer

DIRECTION_ANY, DIRECTION_EAST, DIRECTION_NONE, DIRECTION_NORTH, DIRECTION_SOUTH, DIRECTION_WEST

Constructor Summary

TreeDrawer.HierarchicTreePlacer(double minimalNodeDistance)
Creates a new TreeDrawer.HierarchicTreePlacer instance with the given minimum allowed distance between two nodes of the same layer.

Method Summary

protected byte	determineChildConnector(Node child) Determines a connector direction for the given child node.
protected GenericTreeLayouter.SubtreeShape	placeSubtree(Node localRoot, byte parentConnectorDirection) Arranges the local root relative to the GenericTreeLayouter.SubtreeShape of its children.

Methods inherited from class y.layout.tree.AbstractNodePlacer

clone, createProcessor, determineChildConnectors, getNodeShape, getSubtreeShape, placeSubtree

Methods inherited from class java.lang.Object

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

Constructor Detail

TreeDrawer.HierarchicTreePlacer

public TreeDrawer.HierarchicTreePlacer(double minimalNodeDistance)

Creates a new TreeDrawer.HierarchicTreePlacer instance with the given minimum allowed distance between two nodes of the same layer.

Parameters:

minimalNodeDistance - the minimum allowed distance between two nodes of the same layer

Method Detail

determineChildConnector

protected byte determineChildConnector(Node child)

Description copied from class: AbstractNodePlacer

Determines a connector direction for the given child node.

This method is used in AbstractNodePlacer.determineChildConnectors(Node, DataMap) and must be implemented by subclasses.

Specified by:

determineChildConnector in class AbstractNodePlacer

Parameters:

child - the child node

Returns:

a direction specifier as defined in the NodePlacer interface

placeSubtree

protected GenericTreeLayouter.SubtreeShape placeSubtree(Node localRoot,
                                                        byte parentConnectorDirection)

Description copied from class: AbstractNodePlacer

Arranges the local root relative to the GenericTreeLayouter.SubtreeShape of its children.

This is the main method that must be implemented by subclasses. It is called by AbstractNodePlacer.placeSubtree(DataProvider, DataProvider, LayoutGraph, Node, byte).

Specified by:

placeSubtree in class AbstractNodePlacer

Parameters:

localRoot - the local root node

parentConnectorDirection - the direction of the connector

Returns:

a GenericTreeLayouter.SubtreeShape instance that describes the shape of the whole subtree rooted at the given local root