Interfaces that define the different ways the appearance of elements can be transformed.
The purpose of transformers is to change the appearance of elements
based on user parameters and column's values. There are three types
of transformers: simple, ranking and partition. The simple transformer
interface is defined in org.gephi.appearance.spi.SimpleTransformer
.
The ranking and partition transformers are both based on the specific value
an element has in a given column. The ranking transformer work with
numerical, sorted values (e.g. age, number of followers) and the
partition transformer work with categorical values (e.g. community id,
gender). The ranking transformer is defined in org.gephi.appearance.spi.RankingTransformer
and the partition transformer in org.gephi.appearance.spi.PartitionTransformer
.
Then, transformers can be associated with user interfaces elements
through the implementation of org.gephi.appearance.spi.TransformerUI
.