To call a function of a parent, you can use the callback pattern . In this example, a function on the color selected is passed to the child. The child calls the function when a button is pressed: import ‘package:flutter/material.
Read moreWhy do we use stateless widget?
Stateless widget are useful when the part of the user interface you are describing does not depend on anything other than the configuration information in the object itself and the BuildContext in which the widget is inflated .
Read moreWhat is stateless and stateful widget in flutter?
A widget is either stateful or stateless. If a widget can change—when a user interacts with it, for example—it’s stateful. A stateless widget never changes . Icon , IconButton , and Text are examples of stateless widgets.
Read moreWhat is a stateful widget flutter?
Stateful Widgets are dynamic widgets . They can be updated during runtime based on user action or data change. Stateful Widgets have an internal state and can re-render if the input data changes or if Widget’s state changes. For Example: Checkbox, Radio Button, Slider are Stateful Widgets.
Read moreWhat are the widget types in Flutter?
There are broadly two types of widgets in Flutter. State-full Widgets and Stateless Widgets . The names are self-explanatory.
Read moreWhat is FittedBox?
FittedBox is a very useful widget that scales and positions its child within itself according to fit and alignment .
Read moreWhat is a Flutter box?
In Flutter, widgets are rendered by their underlying RenderBox objects . Render boxes are given constraints by their parent, and size themselves within those constraints. Constraints consist of minimum and maximum widths and heights; sizes consist of a specific width and height.
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