huey: Internal maintenance specification

This method is called by the ColorReadout widget when the user changes between displaying the text color and displaying the background color. It has two functions:

# - - -   A d j u s t e r . _ _ r e a d o u t H a n d l e r

    def __readoutHandler ( self ):
        """Change the internal and external colors.

          [ if  self.isText() ->
              self  :=  self displaying the text color
              call self.__callback(True, self.textColor())
            else ->
              self  :=  self displaying the background color
              call self.__callback(False, self.bgColor()) ]
        """

The first step is to determine which color the sliders display: the text color or the background color. Then order the ColorSliders widget to display that color using the current color model.

        #-- 1 --
        if self.isText():
            sliderColor  =  self.textColor()
        else:
            sliderColor  =  self.bgColor()

        #-- 2 --
        # [ self.__colorSliders  :=  self.__colorSliders displaying
        #                            sliderColor ]
        self.__colorSliders.setColor ( sliderColor )

We must also notify self's callback.

        #-- 3 --
        if  self.__callback is not None:
            self.__callback ( self.isText(), sliderColor )