Color Key API

The constructor takes a list of codes as strings and creates a ColorKey object. Each code is assigned a color. The codes are used to extract colors from the key.

def get_color(self, code):
'''
Given a code, return the corresponding color.
If the code is not in set of known codes,
then return the default color (gray).

Inputs:
    tag: string

Returns: color
'''


def draw_color_key(self, canvas, x0, y0, x1, y1, code_to_label=None):
'''
Draw the color key in the specified rectangle ((x0, y0), (x1, y1)).

Inputs:
    canvas: ChiCanvas object
    x0, y0, x1, y1: floats with coordinates for points (x0, y0)
        and (x1, y1)
    code_to_label: (optional) maps codes to strings that will
       be used to identify the colors.
'''