PPT Slide

3. Outline classes, assigning

from two lists

a. Drawing: Canvas subclass

-- paint method draws

-- has reference to controls

-- boolean flags for clear/draw

b. Control panel: Panel subclass

-- has Button, Label, Choice

-- sets flags in canvas to clear/

change color, etc.

-- has reference to canvas

c. Top container: Applet subclass

-- BorderLayout

-- Introduces classes to each

other

-- Sets some initial values

Design #1: Interfaces Only