Here are the classes, structs, unions and interfaces with brief descriptions:

[detail level 12]

Nbugui
Ccolor	Generic colour class holding RGBA values of a primary and a secondary colour. The blinking and pulsing states indicate discrete or smooth cycling between the primary and secondary colour
Cbase_converter	Provides base functionalities for converting color objects to devices specific colour values
Cbase_palette	Provides access to the device's colour palette
Cbase_palette< T >	Provides access to the device's colour palette and converts it from HEX to RGB values
Ccolor_converter	Povides convertion of color objects to device specific integer values
Ccolor_converter< T, color::rgba >	Basic wrapper for devices supporting RGBA colours
Ccolor_converter< T, uint8_t >	Converts color objects for grayscal only devices
Cbase_controller	Serves as the root of the widget tree. Also provides access to buttons componnents
Ccontroller	Main class to inherit from. Acts ast the root of the widget tree, and provides generic access to the hardware through the painter and presser objects
Cctrlr_deleter	Ensures that buttons labeled Delete triggers the delete funcitonlaity on the widget tree, even if on_Delete is not defined by the user
Cctrlr_deleter< T >	Basic wrapper to handle user defined on_Delete funtction
Cctrlr_shifter	Ensures that buttons labeled Shift are registered on press and can be queried with Shift_held, event if on_Shift is not defined by the user
Cctrlr_shifter< T >	Basic wrapper to handle user defined on_Shift function
Cpoint	Provides the basics of 2D geometry. Primarily used as the top left and bottom right corners of the rectangle class
Crectangle	Provides the geometric structure of widgets
Cbase_hardware	Provides base functionalities of the hardware object, and enables access from the base_controller
Cbuttons	Empty struct for devices that do not feature labelled buttons
Cbuttons< Device, Controller >	Handles presses and enables painting on the device's labelled buttons
Ccomponent	Inherits from all type of hardware components like grid, buttons... Provides the hardware type with the functionalities to interact with each components
Cgrid	Empty struct fro device's that do not feature a button grid
Cgrid< Device, Controller >	Handle presses and enables painting on the device's button grid
Chardware	Inherits from different protocols, depending on the device's specification
Chardware_factory	Instantiate a hardware object specialised with a specific device
Cmidi_base
Cmidi_base< Device, Controller >
Cmidi
Cmidi_in
Cmidi_message
Cmidi_message< Tp >
Cmidi_out
Csysex_out
Cbase_painter	Holds a color object and provides the relevant setters
Cbutton_painter	Conveys button colors from the controller to the base_hardware
Cbutton_presser
Cpainter	The painter class
Cpresser
Cbase_container_widget	Provides functionalities for 2D widget that can hold other widgets as children
Cbase_widget	Provides the minimum required 2D widget functionalities
Ccontainer_widget	To be inherited to create custom wigets whcih can hold other widgets as children. Derived classes must be passeed as the template type
Cdeleter
Cdeleter< T, H, false >	Calls on_Delete if defined
Cwidget	To be inherited to create custom wigets. Derived classes must be passeed as the template type