org.deegree.graphics.optimizers
Class LabelOptimizer

java.lang.Object
  org.deegree.graphics.optimizers.AbstractOptimizer
      org.deegree.graphics.optimizers.LabelOptimizer

All Implemented Interfaces:

Optimizer

public class LabelOptimizer
extends AbstractOptimizer

Selects the optimal Labels (graphical representations generated from LabelDisplayElements) with respect to the amount of overlapping.

The labeling and optimization approach uses ideas from papers by Ingo Petzold on automated label placement.

TODO: The handling of rotated labels is currently broken. Don't use rotated LabelDisplayElements with this optimizer at the moment!

Version:

$Revision: 18195 $, $Date: 2009-06-18 17:55:39 +0200 (Do, 18. Jun 2009) $

Author:

Markus Schneider, last edited by: $Author: mschneider $

Field Summary

Fields inherited from class org.deegree.graphics.optimizers.AbstractOptimizer

mapView, themes

Constructor Summary

LabelOptimizer()
Creates a new instance of LabelOptimizer with no associated Themes.

LabelOptimizer(Theme[] themes)
Creates a new instance of LabelOptimizer for the given Themes.

Method Summary

void	addTheme(Theme theme) Adds a Theme to be considered by this Optimizer.
void	optimize(Graphics2D g) Finds optimized Labels for the registered LabelDisplayElements.

Methods inherited from class org.deegree.graphics.optimizers.AbstractOptimizer

setMapView

Methods inherited from class java.lang.Object

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

Constructor Detail

LabelOptimizer

public LabelOptimizer()

Creates a new instance of LabelOptimizer with no associated Themes.

LabelOptimizer

public LabelOptimizer(Theme[] themes)

Creates a new instance of LabelOptimizer for the given Themes.

Parameters:

themes -

Method Detail

addTheme

public void addTheme(Theme theme)

Description copied from interface: Optimizer

Adds a Theme to be considered by this Optimizer.

Specified by:

addTheme in interface Optimizer

Overrides:

addTheme in class AbstractOptimizer

Parameters:

theme - Theme to be considered

optimize

public void optimize(Graphics2D g)
              throws Exception

Finds optimized Labels for the registered LabelDisplayElements.

Parameters:

g -

Throws:

Exception