Create a "drawing pad" example guest application

[niklabh]

Description

The examples/ folder currently has a hello-world, audio player, timer demo, and a notes app. A drawing pad would be a great addition — it's visual, interactive, and showcases the canvas + input APIs working together.

What to build

A simple drawing app where the user can:

1. Draw freehand — track mouse position each frame and draw lines/circles at the cursor
2. Pick colors — use buttons or a simple palette to change the drawing color
3. Clear the canvas — a "Clear" button to start over
4. Adjust brush size — use a slider widget to control line thickness

APIs to use

• canvas_clear, canvas_circle, canvas_line — for drawing
• mouse_position, mouse_button_down — for tracking input
• ui_button, ui_slider — for UI controls
• on_frame — for the interactive frame loop

Structure

examples/drawing-pad/
├── Cargo.toml
└── src/
    └── lib.rs

Remember to add the crate to the workspace members in the root Cargo.toml.

Build & test

cargo build --target wasm32-unknown-unknown --release -p drawing-pad
# Open the .wasm in Oxide browser

Difficulty

Beginner to Intermediate — great way to learn the oxide-sdk APIs hands-on. A working drawing pad can be built in ~100-150 lines of Rust.