We're continuing our exciting journey of building real-world applications. So far, we’ve delved into the Adapter, Composite, and Decorator Patterns independently. In this lesson, we’ll see how these patterns can solve real-world problems by integrating them into different scenarios.

Before we dive in, let's quickly recap the structural patterns we have learned so far:

1. Adapter Pattern: This pattern allows two incompatible interfaces to work together. We do this by creating an adapter class that converts one interface to another.
2. Composite Pattern: This pattern lets us compose objects into tree structures to represent part-whole hierarchies. This allows clients to treat individual objects and compositions of objects uniformly.
3. Decorator Pattern: This pattern enables us to add new functionality to an object dynamically. We achieve this by creating a decorator class that wraps around the original object.

We'll bring these three structural patterns together in various scenarios to tackle real-world problems. Let’s get started!

In this unit, we will integrate all three structural patterns into different scenarios. Here’s a quick peek at what we'll be working on:

1. Applying Decorator and Adapter patterns to GUI library-related tasks.
2. Using Decorator and Composite to build and manage restaurant menu items.
3. Implementing Adapter and Composite for an image gallery.
4. Lastly, combining all three patterns to enhance an e-commerce application and a food delivery application.

Exciting, right? Let’s dive in!