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public interface ILabelPainter
The Labeller draws the labels from each renderer on the top layer of the map. New implementations can be registered using the net.refractions.udig.project.ui.label.painter extension point.
The basic implementation maintains a cache of Labels so that various heuristics can be ran on them. For example making sure that labels don't overlap. At the end of each rendering the cached labels are deleted. Except for those added using the putPermanentLabel.
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