Building a Figma Clone App with Flutter and Supabase Realtime

In this tutorial, we will create a Figma clone app using Flutter and Supabase Realtime. The app will allow multiple users to collaborate in real time on a design canvas. We will be using Flutter's CustomPainter class, which enables us to interact with the low-level canvas API, and Supabase Realtime Broadcast to sync the state of the canvas across all clients.

The app will have the following features:

• Drawing shapes such as circles and rectangles
• Moving shapes around on the canvas
• Syncing the cursor position and design objects with other clients in real time
• Persisting the state of the canvas in a Postgres database

To set up the app, follow these steps:

1. Create a blank Flutter application.
2. Add the dependencies for Supabase and UUID to your app.
3. Create a constants file to store app constants.
4. Create data models for the cursor position and design objects.

Next, let's build the Figma clone app:

1. Create a canvas widget and set up an interactive CustomPainter.
2. Implement logic to handle drawing shapes and moving them on the canvas.
3. Add functionality to sync the cursor position and design objects in real time using Supabase Realtime Broadcast.
4. Update the canvas state and persist it in the database.

For a more detailed step-by-step guide and example code, please refer to the full tutorial here.

By following this tutorial, you will be able to create a collaborative design board app similar to Figma, where multiple users can create and manipulate shapes in real time.