Flutter – FractionalTranslation Widget

In Flutter, the FractionalTranslation widget allows you to translate its child widget by a fraction of its own size along both the horizontal and vertical axes. In this article, we are going to implement the FractionalTranslation widget and explore some properties of it. A sample Image is given below to get an idea about what we are going to do in this article.

Basic Syntax of FractionalTranslation Widget

FractionalTranslation(
  translation: Offset(dx, dy),
  child: YourChildWidget(),
)

Required Tools

To build this app, you need the following items installed on your machine:

• Visual Studio Code / Android Studio
• Android Emulator / iOS Simulator / Physical Device device.
• Flutter Installed
• Flutter plugin for VS Code / Android Studio.

Step By Step Implementation

Step 1: Create a New Project in Android Studio

To set up Flutter Development on Android Studio please refer to Android Studio Setup for Flutter Development, and then create a new project in Android Studio please refer to Creating a Simple Application in Flutter.

Step 2: Import the Package

First of all import material.dart file.

import 'package:flutter/material.dart';

Step 3: Execute the main Method

Here the execution of our app starts.

Dart

void main() {
  runApp(MyApp());
}

Step 4: Create MyApp Class

In this class we are going to implement the MaterialApp , here we are also set the Theme of our App.

Dart

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
       theme: ThemeData(
        primarySwatch: Colors.green, // Set the app's primary theme color
      ),
      debugShowCheckedModeBanner: false,
      home: FractionalTranslationExample(),
    );
  }
}

Step 5: Create FractionalTranslationExample Class

In this class we are going to Implement the FractionalTranslation widget.The translation property of FractionalTranslation is set to Offset(0.8, 0.2), which means it will translate its child by 80% of the child’s own width to the right and 20% of its own height down. Comments are added for better understanding.

FractionalTranslation(
          translation: Offset(0.8, 0.2), // Translate by 80% of its width and 20% of its height
          child: Container(
            width: 100,
            height: 100,
            color: Colors.green, // Background color of the Container
            child: Center(
              child: Text(
                'FractionalTranslation',
                style: TextStyle(color: Colors.white), // Text color
              ),
            ),
          ),
        ),

Dart

class FractionalTranslationExample extends StatelessWidget {

  const FractionalTranslationExample({super.key});

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('FractionalTranslation Example'),
      ),
      body: Center(
        child: FractionalTranslation(
          // Translate by 80% of its width
          // and 20% of its height
          translation: Offset(0.8, 0.2),
          child: Container(
            width: 100,
            height: 100,
            // Background color of the Container
            color: Colors.green,
            child: Center(
              child: Text(
                'FractionalTranslation',
                // Text color
                style: TextStyle(color: Colors.white),
              ),
            ),
          ),
        ),
      ),
    );
  }
}

Here is the full Code of main.dart file

Dart

import 'package:flutter/material.dart';

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      theme: ThemeData(
        // Set the app's primary theme color
        primarySwatch: Colors.green,
      ),
      debugShowCheckedModeBanner: false,
      home: FractionalTranslationExample(),
    );
  }
}

class FractionalTranslationExample extends StatelessWidget {
  const FractionalTranslationExample({super.key});

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('FractionalTranslation Example'),
      ),
      body: Center(
        child: FractionalTranslation(
          // Translate by 80% of its width
          // and 20% of its height
          translation: Offset(0.8, 0.2),
          child: Container(
            width: 100,
            height: 100,
            // Background color of the Container
            color: Colors.green,
            child: Center(
              child: Text(
                'FractionalTranslation',
                // Text color
                style: TextStyle(color: Colors.white),
              ),
            ),
          ),
        ),
      ),
    );
  }
}

Output: