Create a custom widget
While Ratatui offers a rich set of pre-built widgets, there may be scenarios where you require a unique component tailored to specific needs. In such cases, creating a custom widget becomes invaluable. This page will guide you through the process of designing and implementing custom widgets.
At the core of creating a custom widget is the
Widget trait. Any struct that implements this trait
can be rendered using the framework’s drawing capabilities.
render method must draw into the current
Buffer. There are a number of methods implemented
For a given state, the
Widget trait implements how that struct should be rendered.
Ratatui also has a
StatefulWidget. This is essentially a widget that can “remember” information
between two draw calls. This is essential when you have interactive UI components, like lists, where
you might need to remember which item was selected or how much the user has scrolled.
Here’s a breakdown of the trait:
type State: This represents the type of the state that this widget will use to remember details between draw calls.
fn render(...): This method is responsible for drawing the widget on the terminal. Notably, it also receives a mutable reference to the state, allowing you to read from and modify the state as needed.