Class Palette

source code

                       object --+    
                                |    
param.parameterized.Parameterized --+
                                    |
                                   Palette

Known Subclasses:

• Monochrome

Each palette has 3*256 values that are keyed by an index. This base class takes in a list of 256 triples.

A Palette object has 256 triples of RGB values ranging from 0 ... 255. The purpose of the class is to maintain an accurate palette conversion between a number (0..255) and an RGB triple even as the background of the plots change. If the background is Black, then the 0 intensity should often be 0, but if the background of the Plot should be white, then the 0 intensity should probably be 255. This automatic updating is possible through the use of Dynamic Parameters, and lambda functions.

This class stores a passed in variable named colors. If the variable is a lambda function that gives the 256 triples, then it will evaluate the lambda each time a datarequest is made. If it is a static list, then the palette is fixed. It may be possible to make Palette a 'pure' Dynamic parameter, with different types of palettes setting the lambda. More power to you if you do that.