State Management

When developing Flutter applications, we frequently need to handle information that changes over time: the number displayed on a counter, whether the user is logged in or not, items in a shopping cart, the current app theme. This information that can change and needs to be shared across different parts of the application is what we call state. Managing state means controlling this information in an organized way: where it’s stored, how it’s modified, and how widgets are notified when it changes to update the interface. ...

In many applications, a calendar is more than just a grid of dates; it’s a scheduling tool, an event planner, or a way to visualize data over time. Although ready-made packages exist, building your own calendar widget in Flutter offers unparalleled control over its appearance, functionality, and business logic. In this tutorial, we will dive deep into the process of creating a monthly calendar widget. We’ll dissect the source code snippet by snippet, explaining the logic behind each part. At the end, we will present the complete, clean files, ready to be copied into your project. ...