org.gvsig.fmap.mapcontrol

Class MapControl.Drawer

java.lang.Object

org.gvsig.fmap.mapcontrol.MapControl.Drawer

Enclosing class:

MapControl

public class MapControl.Drawer
extends Object

An instance of Drawer2 could manage all MapControl painting requests.

Based on the WorkerThread software pattern, creates a worker thread that will attend sequentially the current waiting painting request, after finishing the previous (that could be by a cancel action).

All new PaintingRequest generated will be stored as waiting requests since the worker attends it.

If a worker finished and there was no painting request, the worker would be set to wait until any painting request would be put.

Constructor Summary

Constructors

Constructor and Description
MapControl.Drawer() Creates a new drawer for managing all data painting requests in MapControl.

Method Summary

Methods

Modifier and Type	Method and Description
void	put(org.gvsig.fmap.mapcontrol.MapControl.PaintingRequest newPaintRequest) Sets a PaintingRequest to be attended by the worker thread of this object.
void	setShutdown(boolean isShutdown) Sets this Drawer2's worker to finish or continue with its process.
org.gvsig.fmap.mapcontrol.MapControl.PaintingRequest	take() Used by this object's worker, returns the current waiting drawing request, causing current thread to wait until another thread invokes #put(com.iver.cit.gvsig.fmap.MapControl.PaintingRequest), if there was no waiting request.

Methods inherited from class java.lang.Object

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

Constructor Detail

MapControl.Drawer

public MapControl.Drawer()

Creates a new drawer for managing all data painting requests in MapControl.

Includes the following steps:

• By default, there is no current painting request.
• By default, there is no waiting painting request.
• By default, the worker thread is waiting no painting request.
• By default, the worker thread is running.
• Creates and starts a worker thread for attending the painting requests.

Method Detail

setShutdown

public void setShutdown(boolean isShutdown)

Sets this Drawer2's worker to finish or continue with its process.

Parameters:

isShutdown - a boolean value

put

public void put(org.gvsig.fmap.mapcontrol.MapControl.PaintingRequest newPaintRequest)

Sets a PaintingRequest to be attended by the worker thread of this object. If this one was waiting, wakes up.

All waiting threads will be notified synchronized.

Parameters:

newPaintRequest -

See Also:

take()

take

public org.gvsig.fmap.mapcontrol.MapControl.PaintingRequest take()

Used by this object's worker, returns the current waiting drawing request, causing current thread to wait until another thread invokes #put(com.iver.cit.gvsig.fmap.MapControl.PaintingRequest), if there was no waiting request.

All threads will access synchronized to the waiting request.

Returns:

PaintingRequest that was waiting to be attended

See Also:

put(org.gvsig.fmap.mapcontrol.MapControl.PaintingRequest)