Colored panes


Create a colored Canvas class. We have provided a simple test that draws a 2x2 grid of colored canvases.

An OS/2 C version of this Magercise exists in this directory. Note that the behavior of the C program may not be the same as the Magercise -- it is presented here for comparision against the Java application you will write in this Magercise. One of the major differences is that the C version does not support layout managers, so resizing a window will not resize the contents of that window.

Work Location

Perform all work for this magercise in VisualAge project MageLang Magercises, package magercises.coloredpanes.

If this project does not appear in your Workspace add it from the repository (if it exists there) or create a new project using this name.

Tasks

Perform the following tasks:

  1. Create class ColorCanvas as a subclass of Canvas. Make a constructor that sets an instance variable according to the color passed in.

  2. Define a paint method that sets the color and fills the entire region with that color.

The task numbers above are linked to the step-by-step help page. Also available is a complete solution to the problem, and expected behavior, to demonstrate it.

Copyright © 1996-1997 MageLang Institute. All Rights Reserved.