How is the data frame formation process carried out?

In Flutter, the process of frame formation is related to rendering the interface and updating the screen. A frame is formed in several stages:

1. Build — a widget tree describing the UI is created.
2. Layout — the sizes and positions of elements on the screen are calculated.
3. Paint — elements are drawn on the canvas.

Flutter uses its own rendering engine, which collects information about what has changed on each frame and updates only the necessary parts of the screen. This allows for efficient frame data formation.

It can be roughly represented as:

@override
Widget build(BuildContext context) {
  return Scaffold(
    body: Center(
      child: Text('Hello, Flutter!'),
    ),
  );
}

When the widget's state changes, Flutter calls build again, recalculates layout and paint, forming a new frame.