prefuse.action
Class EncoderAction

java.lang.Object
  prefuse.activity.Activity
      prefuse.action.Action
          prefuse.action.GroupAction
              prefuse.action.ItemAction
                  prefuse.action.EncoderAction

Direct Known Subclasses:

ColorAction, FontAction, ShapeAction, SizeAction, StrokeAction

public abstract class EncoderAction

extends ItemAction

ItemAction instance that can also maintain a collection of rule mappings that can be used by subclasses to create particular rule-mappings for encoding data values.

Author:

jeffrey heer

Field Summary

Fields inherited from class prefuse.action.ItemAction

m_predicate

Fields inherited from class prefuse.action.GroupAction

m_group

Fields inherited from class prefuse.action.Action

m_vis

Fields inherited from class prefuse.activity.Activity

DEFAULT_STEP_TIME, INFINITY

Constructor Summary

EncoderAction()
Create a new EncoderAction that processes all data groups.

EncoderAction(java.lang.String group)
Create a new EncoderAction that processes the specified group.

EncoderAction(java.lang.String group, Predicate filter)
Create a new EncoderAction that processes the specified group.

EncoderAction(Visualization vis)
Create a new EncoderAction that processes all groups.

EncoderAction(Visualization vis, java.lang.String group)
Create a new EncoderAction that processes the specified group.

EncoderAction(Visualization vis, java.lang.String group, Predicate filter)
Create a new EncoderAction that processes the specified group.

Method Summary

protected void	add(Predicate p, java.lang.Object value) Add a mapping rule to this EncoderAction.
void	clear() Remove all rule mappings from this encoder.
protected void	finish() Perform any necessary clean-up after this encoder can be used.
protected java.lang.Object	lookup(VisualItem item) Lookup the value mapped to by the given item.
boolean	remove(Predicate p) Remove rules using the given predicate from this encoder.
void	run(double frac) Runs this Action, triggering whatever processing this Action performs.
protected void	setup() Perform any necessary setup before this encoder can be used.
void	setVisualization(Visualization vis) Set the Visualization processed by this Action.

Methods inherited from class prefuse.action.ItemAction

getFilterPredicate, process, setFilterPredicate

Methods inherited from class prefuse.action.GroupAction

getGroup, setGroup

Methods inherited from class prefuse.action.Action

getVisualization, run

Methods inherited from class prefuse.activity.Activity

addActivityListener, alwaysRunAfter, cancel, fireActivityCancelled, fireActivityFinished, fireActivityScheduled, fireActivityStarted, fireActivityStepped, getDuration, getNextTime, getPace, getPacingFunction, getStartTime, getStepTime, getStopTime, isEnabled, isRunning, isScheduled, removeActivityListener, run, runAfter, runAt, setDuration, setEnabled, setPacingFunction, setStartTime, setStepTime

Methods inherited from class java.lang.Object

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

Constructor Detail

EncoderAction

public EncoderAction()

Create a new EncoderAction that processes all data groups.

EncoderAction

public EncoderAction(Visualization vis)

Create a new EncoderAction that processes all groups.

Parameters:

vis - the Visualization to process

See Also:

Visualization.ALL_ITEMS

EncoderAction

public EncoderAction(java.lang.String group)

Create a new EncoderAction that processes the specified group.

Parameters:

group - the name of the group to process

EncoderAction

public EncoderAction(java.lang.String group,
                     Predicate filter)

Create a new EncoderAction that processes the specified group.

Parameters:

group - the name of the group to process

filter - the filtering Predicate

EncoderAction

public EncoderAction(Visualization vis,
                     java.lang.String group)

Create a new EncoderAction that processes the specified group.

Parameters:

vis - the Visualization to process

group - the data group to process

EncoderAction

public EncoderAction(Visualization vis,
                     java.lang.String group,
                     Predicate filter)

Create a new EncoderAction that processes the specified group.

Parameters:

vis - the Visualization to process

group - the name of the group to process

filter - the filtering Predicate

Method Detail

add

protected void add(Predicate p,
                   java.lang.Object value)

Add a mapping rule to this EncoderAction. This method is protected, subclasses should crate public add methods of their own to enforce their own type constraints.

Parameters:

p - the rule Predicate

value - the value to map to

lookup

protected java.lang.Object lookup(VisualItem item)

Lookup the value mapped to by the given item.

Parameters:

item - the item to lookup

Returns:

the result of the rule lookup

clear

public void clear()

Remove all rule mappings from this encoder.

remove

public boolean remove(Predicate p)

Remove rules using the given predicate from this encoder. This method will not remove rules in which this predicate is used within a composite of clauses, such as an AND or OR. It only removes rules using this predicate as the top-level trigger.

Parameters:

p - the predicate to remove

Returns:

true if a rule was successfully removed, false otherwise

setVisualization

public void setVisualization(Visualization vis)

Description copied from class: Action

Set the Visualization processed by this Action.

Overrides:

setVisualization in class Action

Returns:

the Visualization to process.

See Also:

Action.setVisualization(prefuse.Visualization)

run

public void run(double frac)

Description copied from class: Action

Runs this Action, triggering whatever processing this Action performs. Subclass this method to create custom Actions.

Overrides:

run in class ItemAction

See Also:

Action.run(double)

setup

protected void setup()

Perform any necessary setup before this encoder can be used. By default does nothing. Subclasses can override this method to perform custom setup before the Action is used.

finish

protected void finish()

Perform any necessary clean-up after this encoder can be used. By default does nothing. Subclasses can override this method to perform custom clean-up after the Action is used.