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java.lang.Objectedu.uci.ics.jung.algorithms.layout.AbstractLayout<V,E>
edu.uci.ics.jung.algorithms.layout.SpringLayout<V,E>
public class SpringLayout<V,E>
The SpringLayout package represents a visualization of a set of nodes. The
SpringLayout, which is initialized with a Graph, assigns X/Y locations to
each node. When called relax()
, the SpringLayout moves the
visualization forward one step.
Nested Class Summary | |
---|---|
class |
SpringLayout.SpringDimensionChecker
Used for changing the size of the layout in response to a component's size. |
protected static class |
SpringLayout.SpringVertexData
|
Field Summary | |
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protected double |
force_multiplier
|
protected org.apache.commons.collections15.Transformer<E,Integer> |
lengthFunction
|
protected int |
repulsion_range_sq
|
protected Map<V,SpringLayout.SpringVertexData> |
springVertexData
|
protected double |
stretch
|
Fields inherited from class edu.uci.ics.jung.algorithms.layout.AbstractLayout |
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graph, initialized, locations, size |
Constructor Summary | |
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SpringLayout(Graph<V,E> g)
Constructor for a SpringLayout for a raw graph with associated dimension--the input knows how big the graph is. |
|
SpringLayout(Graph<V,E> g,
org.apache.commons.collections15.Transformer<E,Integer> length_function)
Constructor for a SpringLayout for a raw graph with associated component. |
Method Summary | |
---|---|
protected void |
calculateRepulsion()
|
boolean |
done()
For now, we pretend it never finishes. |
double |
getForceMultiplier()
Returns the current value for the edge length force multiplier. |
int |
getRepulsionRange()
Returns the current value for the node repulsion range. |
double |
getStretch()
Returns the current value for the stretch parameter. |
void |
initialize()
Initializes fields in the node that may not have been set during the constructor. |
boolean |
isIncremental()
This one is an incremental visualization |
protected void |
moveNodes()
|
protected void |
relaxEdges()
|
void |
reset()
No effect. |
void |
setForceMultiplier(double force)
Sets the force multiplier for this instance. |
void |
setRepulsionRange(int range)
Sets the node repulsion range (in drawing area units) for this instance. |
void |
setSize(Dimension size)
Sets the dimensions of the available space for layout to size . |
void |
setStretch(double stretch)
Sets the stretch parameter for this instance. |
void |
step()
Relaxation step. |
Methods inherited from class edu.uci.ics.jung.algorithms.layout.AbstractLayout |
---|
getGraph, getSize, getX, getY, isLocked, lock, lock, offsetVertex, setGraph, setInitializer, setLocation, setLocation, transform |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Field Detail |
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protected double stretch
protected org.apache.commons.collections15.Transformer<E,Integer> lengthFunction
protected int repulsion_range_sq
protected double force_multiplier
protected Map<V,SpringLayout.SpringVertexData> springVertexData
Constructor Detail |
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public SpringLayout(Graph<V,E> g)
public SpringLayout(Graph<V,E> g, org.apache.commons.collections15.Transformer<E,Integer> length_function)
g
- the Graph
to lay outlength_function
- provides a length for each edgeMethod Detail |
---|
public double getStretch()
setStretch(double)
public void setSize(Dimension size)
size
.
setSize
in interface Layout<V,E>
setSize
in class AbstractLayout<V,E>
public void setStretch(double stretch)
Sets the stretch parameter for this instance. This value specifies how much the degrees of an edge's incident vertices should influence how easily the endpoints of that edge can move (that is, that edge's tendency to change its length).
The default value is 0.70. Positive values less than 1 cause high-degree vertices to move less than low-degree vertices, and values > 1 cause high-degree vertices to move more than low-degree vertices. Negative values will have unpredictable and inconsistent results.
stretch
- public int getRepulsionRange()
setRepulsionRange(int)
public void setRepulsionRange(int range)
range
- public double getForceMultiplier()
setForceMultiplier(double)
public void setForceMultiplier(double force)
public void initialize()
Layout
initialize
in interface Layout<V,E>
public void step()
step
in interface IterativeContext
protected void relaxEdges()
protected void calculateRepulsion()
protected void moveNodes()
public boolean isIncremental()
public boolean done()
done
in interface IterativeContext
public void reset()
reset
in interface Layout<V,E>
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