com.bbn.openmap.layer.policy
Class BufferedImageRenderPolicy

java.lang.Object
  com.bbn.openmap.MapHandlerChild
      com.bbn.openmap.OMComponent
          com.bbn.openmap.layer.policy.StandardRenderPolicy
              com.bbn.openmap.layer.policy.RenderingHintsRenderPolicy
                  com.bbn.openmap.layer.policy.BufferedImageRenderPolicy

All Implemented Interfaces:

RenderPolicy, LightMapHandlerChild, PropertyConsumer, java.beans.beancontext.BeanContextChild, java.beans.beancontext.BeanContextMembershipListener, java.util.EventListener

public class BufferedImageRenderPolicy
extends RenderingHintsRenderPolicy

The BufferedImageRenderPolicy is a RenderPolicy that creates and uses an image buffer based on the painting times for the layer. If the time to paint exceeds the bufferTiggerDelay, an image buffer for the layer is used for paints as long as the projection doesn't change. A new buffer is used for a projection change because we need the image buffer to be transparent for parts of the map that are not used by the layer.

Field Summary

protected OMRaster	buffer
protected java.lang.String	CURRENT_PROJECTION

Fields inherited from class com.bbn.openmap.layer.policy.RenderingHintsRenderPolicy

renderingHints, RenderingHintsProperty

Fields inherited from class com.bbn.openmap.layer.policy.StandardRenderPolicy

composite, layer, logger

Fields inherited from class com.bbn.openmap.OMComponent

i18n, propertyPrefix

Fields inherited from class com.bbn.openmap.MapHandlerChild

beanContextChildSupport, isolated

Fields inherited from interface com.bbn.openmap.PropertyConsumer

EditorProperty, initPropertiesProperty, LabelEditorProperty, ScopedEditorProperty

Constructor Summary

BufferedImageRenderPolicy()
Set the layer at some point before use.

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

Method Summary

protected OMRaster	createAndPaintImageBuffer(OMGraphicList list, Projection proj)
protected OMRaster	getBuffer() Get the BufferedImage for the layer.
void	paint(java.awt.Graphics g) If you are going to change the Graphics object in this method, you should make a copy of it first using the Graphics.create() method so the changes won't affect other layers.
OMGraphicList	prepare() Called when an OMGraphicHandlerLayer should begin preparing OMGraphics for the map.
void	prePrepare() Called from the OMGraphicHandlerLayer's doPrepare() method.
protected void	setBuffer(OMRaster bi) Set the BufferedImage for the layer.

Methods inherited from class com.bbn.openmap.layer.policy.RenderingHintsRenderPolicy

getProperties, getPropertyInfo, getRenderingHints, put, setProperties, setRenderingHints, setRenderingHints

Methods inherited from class com.bbn.openmap.layer.policy.StandardRenderPolicy

getComposite, getLayer, setComposite, setCompositeOnGraphics, setLayer

Methods inherited from class com.bbn.openmap.OMComponent

getPropertyPrefix, setProperties, setPropertyPrefix

Methods inherited from class com.bbn.openmap.MapHandlerChild

addPropertyChangeListener, addVetoableChangeListener, childrenAdded, childrenRemoved, findAndInit, findAndInit, findAndUndo, firePropertyChange, fireVetoableChange, getBeanContext, isIsolated, removePropertyChangeListener, removeVetoableChangeListener, setBeanContext, setIsolated

Methods inherited from class java.lang.Object

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

Field Detail

buffer

protected OMRaster buffer

CURRENT_PROJECTION

protected java.lang.String CURRENT_PROJECTION

Constructor Detail

BufferedImageRenderPolicy

public BufferedImageRenderPolicy()

Set the layer at some point before use.

BufferedImageRenderPolicy

public BufferedImageRenderPolicy(OMGraphicHandlerLayer layer)

Don't pass in a null layer.

Method Detail

prePrepare

public void prePrepare()

Called from the OMGraphicHandlerLayer's doPrepare() method. This method updates the current image buffer so it can be re-projected for the current projection before the layer worker goes off to do more work. In case of rapid projection changes, the layer should be able to display the current buffer in the right place, at least.

Specified by:

prePrepare in interface RenderPolicy

Overrides:

prePrepare in class StandardRenderPolicy

prepare

public OMGraphicList prepare()

Description copied from interface: RenderPolicy

Called when an OMGraphicHandlerLayer should begin preparing OMGraphics for the map. This is a hook into the list to help RenderPolicy make decisions or set up the list for faster rendering.

Specified by:

prepare in interface RenderPolicy

Overrides:

prepare in class StandardRenderPolicy

paint

public void paint(java.awt.Graphics g)

Description copied from class: RenderingHintsRenderPolicy

If you are going to change the Graphics object in this method, you should make a copy of it first using the Graphics.create() method so the changes won't affect other layers.

Specified by:

paint in interface RenderPolicy

Overrides:

paint in class RenderingHintsRenderPolicy

getBuffer

protected OMRaster getBuffer()

Get the BufferedImage for the layer.

setBuffer

protected void setBuffer(OMRaster bi)

Set the BufferedImage for the layer.

createAndPaintImageBuffer

protected OMRaster createAndPaintImageBuffer(OMGraphicList list,
                                             Projection proj)