com.bbn.openmap.layer.policy
Class ListResetPCPolicy

java.lang.Object
  |
  +--com.bbn.openmap.layer.policy.ListResetPCPolicy

All Implemented Interfaces:

ProjectionChangePolicy

public class ListResetPCPolicy

extends java.lang.Object

implements ProjectionChangePolicy

ProjectionChangePolicy that uses a Layer SwingWorker to kick off a thread to call layer.prepare() and deletes the current OMGraphicList between projection changes. The standard behavior for layers that gather new OMGraphics for new projections.

Field Summary

protected OMGraphicHandlerLayer

layer Don't let this be null.

Constructor Summary

ListResetPCPolicy()
You MUST set a layer at some point.

ListResetPCPolicy(OMGraphicHandlerLayer layer)
Don't pass in a null layer.

Method Summary

OMGraphicHandlerLayer	getLayer() Get the OMGraphicHandlerLayer to work with.
void	projectionChanged(ProjectionEvent pe) The method that is called when the projection changes.
void	setLayer(OMGraphicHandlerLayer l) Set the OMGraphicHandlerLayer to work with.
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

Field Detail

layer

protected OMGraphicHandlerLayer layer

Don't let this be null.

Constructor Detail

ListResetPCPolicy

public ListResetPCPolicy()

You MUST set a layer at some point.

ListResetPCPolicy

public ListResetPCPolicy(OMGraphicHandlerLayer layer)

Don't pass in a null layer.

Method Detail

setLayer

public void setLayer(OMGraphicHandlerLayer l)

Description copied from interface: ProjectionChangePolicy

Set the OMGraphicHandlerLayer to work with.

Specified by:

setLayer in interface ProjectionChangePolicy

getLayer

public OMGraphicHandlerLayer getLayer()

Description copied from interface: ProjectionChangePolicy

Get the OMGraphicHandlerLayer to work with.

Specified by:

getLayer in interface ProjectionChangePolicy

projectionChanged

public void projectionChanged(ProjectionEvent pe)

Description copied from interface: ProjectionChangePolicy

The method that is called when the projection changes. The ProjectionChangePolicy should modify the OMGraphicList and do other functions as dictated by the policy, like starting threads to gather data and generating new OMGraphics for the layer.

Specified by:

projectionChanged in interface ProjectionChangePolicy

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.

Specified by:

workerComplete in interface ProjectionChangePolicy