Developing a Simple Paint Program in Ruby


Creating a simple paint program is an exciting project that allows you to explore graphical user interfaces (GUI) and basic drawing capabilities using Ruby. In this guide, we'll walk through the steps to develop a basic paint program using Ruby.


Before you start, make sure you have the following prerequisites:

  • Basic knowledge of the Ruby programming language
  • A code editor (e.g., Visual Studio Code, Sublime Text)
  • Familiarity with GUI concepts

Step 1: Choose a GUI Library

Ruby has several GUI libraries to choose from. One popular option is Shoes, which provides a simple way to create graphical applications. You can install Shoes using RubyGems:

# Install the Shoes gem
gem install shoes

Step 2: Create a Basic Canvas

With Shoes, you can create a canvas element to draw on. Here's a sample code to create a canvas and handle mouse events for drawing:

require 'shoes' width: 400, height: 400 do
background white
stroke black
strokewidth 2
drawing = false
prev_x, prev_y = 0, 0
click do
drawing = true
prev_x, prev_y = mouse[1], mouse[2]
release do
drawing = false
motion do
line(prev_x, prev_y, mouse[1], mouse[2]) if drawing
prev_x, prev_y = mouse[1], mouse[2]

Step 3: Customize Your Paint Program

You can enhance your paint program by adding features like different brush sizes, colors, and the ability to save or load drawings. Be creative and customize your program to suit your preferences.


Developing a simple paint program in Ruby is a great way to learn about GUI programming and basic drawing operations. You can expand this project by exploring more advanced features, such as layering, shapes, or additional drawing tools.

Have fun creating your own Ruby-based paint program, and let your artistic side shine!