Package org.evoludo.graphics

Class Network2DGWT

Object

AbstractCollection<Node>

AbstractList<Node>

Network

Network2D

Network2DGWT

All Implemented Interfaces:

Iterable<Node>, Collection<Node>, Iterator<Node>, List<Node>, SequencedCollection<Node>

public class Network2DGWT
extends Network2D

Graphical representation of generic population geometries in 2D. A network corresponds to a (possibly ephemeral) collection and configuration of nodes. This implementation includes optimizations for GWT when scheduling computationally intensive tasks.

Author:

Christoph Hauert

Nested Class Summary

Nested classes/interfaces inherited from class Network

Network.LayoutListener, Network.Status

Field Summary

Fields

Modifier and Type	Field	Description
(package private) Duration	layout	Helper variable to keep track of the time spent layouting the network.
protected static final int	MAX_LINKS_PER_STEP	The minimum number of links to process in one step.
protected static final int	MIN_DELAY_ANIMATE_MSEC	Minimum delay in milliseconds between subsequent updates of the layout in the GUI.
protected int	nextLayoutNode	Helper variable to store the index of the node that needs to be processed next.
(package private) int	prevLayout	Time when last layout update was processed.

Fields inherited from class Network2D

IR, IR2, links, nodes, R

Fields inherited from class Network

accuracy, engine, fLinks, geometry, isRunning, layoutTimeout, listener, MAX_LINK_COUNT, nLinks, nNodes, norm, potential, prevAdjust, prevPotential, rng, status, timestamp

Fields inherited from class AbstractList

modCount

Constructor Summary

Constructors

Constructor	Description
Network2DGWT(EvoLudo engine, Geometry geometry)	Create a new network in 2D for the given engine and geometry with a layouting process optimzed for GWT.

Method Summary

Modifier and Type	Method	Description
void	doLayout(Network.LayoutListener ll)	Start the layouting process.
protected boolean	doLayoutStep()	Perform a single step in the layouting process by relaxing nodes sequentially.
void	reset()	Reset the network (discard any existing layouts).

Methods inherited from class Network2D

attraction, finishLayout, get, getLinks, initNodes, linkNodes, relax, relax, repulsion, toArray

Methods inherited from class Network

adjustAccuracy, cancelLayout, clear, contains, doLayoutPrep, getAccuracy, getGeometry, getLayoutTimout, getRadius, getStatus, hasNext, indexOf, isEmpty, isStatus, iterator, lastIndexOf, next, scaleRadiusTo, set, setAccuracy, setLayoutListener, setLayoutTimout, setRadius, setStatus, shake, size

Methods inherited from class AbstractList

add, add, addAll, equals, hashCode, listIterator, listIterator, remove, removeRange, subList

Methods inherited from class AbstractCollection

addAll, containsAll, remove, removeAll, retainAll, toArray, toString

Methods inherited from class Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface Collection

parallelStream, removeIf, stream, toArray

Methods inherited from interface Iterable

forEach

Methods inherited from interface Iterator

forEachRemaining, remove

Methods inherited from interface List

addAll, addFirst, addLast, containsAll, getFirst, getLast, remove, removeAll, removeFirst, removeLast, replaceAll, retainAll, reversed, sort, spliterator, toArray

Field Details

layout

Duration layout

Helper variable to keep track of the time spent layouting the network.

prevLayout

int prevLayout

Time when last layout update was processed.

MIN_DELAY_ANIMATE_MSEC

protected static final int MIN_DELAY_ANIMATE_MSEC

Minimum delay in milliseconds between subsequent updates of the layout in the GUI. This is used to throttle the animated layout process to a default of at most 20 updates per second.

See Also:

• Constant Field Values

nextLayoutNode

protected int nextLayoutNode

Helper variable to store the index of the node that needs to be processed next. This is to prevent the GUI from becoming unresponsive and allow the layouting process to resume after relaxing a fixed number of nodes.

See Also:

• MAX_LINKS_PER_STEP

MAX_LINKS_PER_STEP

protected static final int MAX_LINKS_PER_STEP

The minimum number of links to process in one step. After MAX_LINKS_PER_STEP links have been processed the next node to continue is stored in nextLayoutNode and control is returned to the event loop, which prevents the GUI from becoming unresponsive. As a welcome side effect, this parcelling resulted in a dramatic speed increase.

See Also:

• Constant Field Values

Constructor Details

Network2DGWT

public Network2DGWT(EvoLudo engine,
 Geometry geometry)

Create a new network in 2D for the given engine and geometry with a layouting process optimzed for GWT.

Parameters:

engine - the pacemaker for running the model

geometry - the structure of the population

Method Details

reset

public void reset()

Description copied from class: Network

Reset the network (discard any existing layouts).

Overrides:

reset in class Network2D

doLayout

public void doLayout(Network.LayoutListener ll)

Description copied from class: Network

Start the layouting process. The layout listener (if any) is informed about the progress of the layouting process. Implementations can take advantage of optimizations available for GWT (scheduling) or JRE (multiple threads).

Specified by:

doLayout in class Network

Parameters:

ll - the layout listener

See Also:

• doLayout(LayoutListener nll)
• Network3DGWT.doLayout(LayoutListener nll)

doLayoutStep

protected boolean doLayoutStep()

Perform a single step in the layouting process by relaxing nodes sequentially. Returns false once the layouting process has completed, i.e. reached the desired accuracy or the time out.

Returns:

true if the layouting process should continue