ptolemy.vergil.basic
Class BasicGraphFrame.PtolemyLayout

java.lang.Object
  diva.graph.layout.AbstractGlobalLayout
      diva.graph.layout.LevelLayout
          ptolemy.vergil.basic.BasicGraphFrame.PtolemyLayout

All Implemented Interfaces:

GlobalLayout

Enclosing class:

BasicGraphFrame

private static class BasicGraphFrame.PtolemyLayout
extends LevelLayout

A layout algorithm for laying out ptolemy graphs. Since our edges are undirected, this layout algorithm turns them into directed edges aimed consistently. i.e. An edge should always be "out" of an internal output port and always be "in" of an internal input port. Conversely, an edge is "out" of an external input port, and "in" of an external output port. The copying operation also flattens the graph, because the level layout algorithm doesn't understand how to layout hierarchical nodes.

Nested Class Summary

Nested classes/interfaces inherited from class diva.graph.layout.LevelLayout

LevelLayout.LevelData, LevelLayout.LevelInfo

Field Summary

Fields inherited from class diva.graph.layout.LevelLayout

_orientation, HORIZONTAL, VERTICAL

Constructor Summary

BasicGraphFrame.PtolemyLayout(LayoutTarget target)
Construct a new levelizing layout with a vertical orientation.

Method Summary

private java.lang.Object	_getParentInGraph(GraphModel model, java.lang.Object graph, java.lang.Object node)
protected java.lang.Object	copyComposite(java.lang.Object origComposite) Copy the given graph and make the nodes/edges in the copied graph point to the nodes/edges in the original.

Methods inherited from class diva.graph.layout.LevelLayout

applyLayout, applyLayout, calculateLayout, copyLayout, getLocalGraphModel, getOrientation, getRandomizedPlacement, isVisited, layout, setAllVisited, setOrientation, setRandomizedPlacement, setVisited

Methods inherited from class diva.graph.layout.AbstractGlobalLayout

getLayoutTarget, setLayoutTarget

Methods inherited from class java.lang.Object

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

Constructor Detail

BasicGraphFrame.PtolemyLayout

public BasicGraphFrame.PtolemyLayout(LayoutTarget target)

Construct a new levelizing layout with a vertical orientation.

Method Detail

copyComposite

protected java.lang.Object copyComposite(java.lang.Object origComposite)

Copy the given graph and make the nodes/edges in the copied graph point to the nodes/edges in the original.

Overrides:

copyComposite in class LevelLayout

_getParentInGraph

private java.lang.Object _getParentInGraph(GraphModel model,
                                           java.lang.Object graph,
                                           java.lang.Object node)