huey: Internal maintenance specification

Adds to the help menu a subtopic “Adjust a color” along with its cascade. This is structurally similar to Section 12.3, “MenuBar.__cascadeNamePicker()”.

# - - -   M e n u B a r . _ _ c a s c a d e A d j u s t e r

    def __cascadeAdjuster ( self, menu ):
        """Add the 'adjust' choice and cascade to the menu.

          [ menu is a Menu ->
              menu  :=  menu with a cascade added about adjusting
                        colors ]
        """
        #-- 1 --
        # [ menu    :=  menu with a new cascade added
        #   select  :=  that cascade ]
        select  =  Menu ( menu )
        menu.add_cascade ( menu=select,
                           label="Adjusting a color" )

For the methods that created the sub-cascades, see Section 12.7, “MenuBar.__helpReadout()”, Section 12.8, “MenuBar.__helpModelSelector()”, Section 12.9, “MenuBar.__helpHSV()”, Section 12.10, “MenuBar.__helpRGB()”, Section 12.11, “MenuBar.__helpCMY()”, and Section 12.12, “MenuBar.__helpSliders()”.

        #-- 2 --
        # [ select  :=  select with pop-ups added that relate to
        #               color adjustment ]
        select.add_command ( label='Selecting background or text color',
            command=self.__helpReadout )

        select.add_command ( label='Color models and color space',
            command=self.__helpModelSelector )

        select.add_command ( label='The HSV color model',
            command=self.__helpHSV )

        select.add_command ( label='The RGB color model',
            command=self.__helpRGB )

        select.add_command ( label='The CMY color model',
            command=self.__helpCMY )

        select.add_command ( label='Using the color sliders',
            command=self.__helpSliders )