com.bbn.openmap.layer.policy
Class AbstractProjectionChangePolicy

java.lang.Object
  com.bbn.openmap.layer.policy.AbstractProjectionChangePolicy

All Implemented Interfaces:

ProjectionChangePolicy

Direct Known Subclasses:

ListResetPCPolicy, NullProjectionChangePolicy, StandardPCPolicy

public abstract class AbstractProjectionChangePolicy
extends java.lang.Object
implements ProjectionChangePolicy

Implements the common functionality of all projection change policies.

Author:

dietrick

Field Summary

protected OMGraphicHandlerLayer

layer

Constructor Summary

protected	AbstractProjectionChangePolicy()
	AbstractProjectionChangePolicy(OMGraphicHandlerLayer omghl)

Method Summary

OMGraphicHandlerLayer	getLayer()
void	setLayer(OMGraphicHandlerLayer omghl)
void	workerComplete(OMGraphicList aList) This is a subtle call, that dictates what should happen when the LayerWorker has completed working in it's thread.

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.bbn.openmap.layer.policy.ProjectionChangePolicy

projectionChanged

Field Detail

layer

protected OMGraphicHandlerLayer layer

Constructor Detail

AbstractProjectionChangePolicy

protected AbstractProjectionChangePolicy()

AbstractProjectionChangePolicy

public AbstractProjectionChangePolicy(OMGraphicHandlerLayer omghl)

Method Detail

setLayer

public void setLayer(OMGraphicHandlerLayer omghl)

Specified by:

setLayer in interface ProjectionChangePolicy

Parameters:

omghl - the OMGraphicHandlerLayer the policy is working for.

getLayer

public OMGraphicHandlerLayer getLayer()

Specified by:

getLayer in interface ProjectionChangePolicy

Returns:

the OMGraphicHandlerLayer the policy is working for.

workerComplete

public void workerComplete(OMGraphicList aList)

This is a subtle call, that dictates what should happen when the LayerWorker has completed working in it's thread. The LayerWorker.get() method returns whatever was returned in the OMGraphicHandler.prepare() method, an OMGraphicList. In most cases, this object should be set as the Layer's list at this time. Some Layers, working asynchronously with their data sources, might want nothing to happen and should use a policy that overrides this method so that nothing does.

Modified as of 5.1.2/5.1 to control when layer.repaint() is called. If the previous OMGraphicList is null, and the current OMGraphicList is also null, then repaint is not called. This is to cut back on a flashing effect when layers that aren't doing anything call for repaints before those that are call for painting.

Specified by:

workerComplete in interface ProjectionChangePolicy

Parameters:

aList - the current OMGraphicList returned from the prepare() method via the SwingWorker thread.