Welcome to this tutorial...

This guide explains how to build a complete Weather Application using modern Linux development tools:

• Rust
• GTK4
• Libadwaita
• Flatpak

The goal of this tutorial is to help new developers understand how modern Linux applications are structured, built, and distributed.

Overview

In this tutorial, you will create a fully functional graphical application that:

• Displays current weather information
• Shows a 7-day forecast
• Allows users to search for cities
• Saves selected cities locally
• Uses a responsive user interface
• Fetches data from a public web API
• Runs safely using background threads
• Is packaged and distributed using Flatpak

The application will follow current best practices for GTK4 and Libadwaita development.

Purpose of This Guide

Developing applications for Linux can initially feel complex. Developers often need to understand:

• System dependencies
• GUI frameworks
• Runtime environments
• Sandboxed packaging systems
• Version compatibility

This guide provides a structured path through these topics.

It begins with a completely empty system and builds the application step by step. Each concept is introduced when needed and explained in context.

The intention is not only to provide working code, but to explain:

• Why each component is necessary
• How the different tools interact
• What common errors mean
• How to debug problems effectively

Structure of This Tutorial

This documentation is divided into logical sections:

1. Environment Setup
2. Creating the Project
3. Building the User Interface
4. Adding Application Logic
5. Fetching and Displaying Data
6. Threading and Concurrency
7. Data Persistence
8. Debugging and Common Errors
9. Flatpak Packaging

Each section builds upon the previous one.

You are encouraged to follow the chapters in order.