Exercise: Modules for the GUI Library
In this exercise, you will reorganize the GUI Library exercise from the “Methods and Traits” segment of the course into a collection of modules. It is typical to put each type or set of closely-related types into its own module, so each widget type should get its own module.
If you no longer have your version, that’s fine - refer back to the provided solution.
Cargo Setup
The Rust playground only supports one file, so you will need to make a Cargo project on your local filesystem:
cargo init gui-modules
cd gui-modules
cargo run
Edit src/main.rs to add mod statements, and add additional files in the
src directory.
Encourage students to divide the code in a way that feels natural for them, and
get accustomed to the required mod, use, and pub declarations. Afterward,
discuss what organizations are most idiomatic.