Flutter – AnimatedPhysicalModel Widget

Last Updated : 24 Oct, 2023

In Flutter, the AnimatedPhysicalModel widget is used to create animations that transition between different physical properties of a widget, such as elevation, shape, and colour. In this article, we are going to implement the AnimatedPhysicalModel widget. A sample video is given below to get an idea about what we are going to do in this article.

Basic Syntax of AnimatedPhysicalModel

AnimatedPhysicalModel(
  duration: Duration(milliseconds: 500), // Animation duration
  curve: Curves.easeInOut, // Animation curve
  elevation: _elevation, // Elevation (animate this property)
  shape: BoxShape.rectangle, // Shape of the widget (rectangle or circle)
  shadowColor: Colors.grey, // Color of the shadow
  color: Colors.blue, // Background color of the widget
  borderRadius: BorderRadius.circular(8.0), // Border radius
  child: YourChildWidget(), // The widget you want to animate
)

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: AnimatedPhysicalModelDemo(), 
    ); 
  } 
}

Step 5: Create AnimatedPhysicalModelDemo Class

In this class we are going to Implement the AnimatedPhysicalModel widget that help to creating an animated card like container that changes its elevation, shape, and color when the “Add Elevation” or “Remove Elevation” button is pressed. Comments are added for better understanding.

 AnimatedPhysicalModel(
              duration: Duration(seconds: 1), // Animation duration
              curve: Curves.easeInOut, // Animation curve
              elevation: _isElevated ? 68.0 : 0.0, // Animate elevation
              shape: BoxShape.rectangle, // Shape of the container
              shadowColor: Colors.green, // Color of the shadow
              color: Colors.green, // Color of the container
              borderRadius: BorderRadius.circular(8.0), // Border radius
              child: Container(
                width: 200,
                height: 200,
                child: Center(
                  child: Text(
                    'Animated',
                    style: TextStyle(
                      color: Colors.white,
                      fontSize: 24,
                    ),
                  ),
                ),
              ),
            ),

Dart

class AnimatedPhysicalModelDemo extends StatefulWidget { 
  @override 
  _AnimatedPhysicalModelDemoState createState() => 
      _AnimatedPhysicalModelDemoState(); 
} 
  
class _AnimatedPhysicalModelDemoState extends State<AnimatedPhysicalModelDemo> { 
  bool _isElevated = false; 
  
  void _toggleElevation() { 
    setState(() { 
      _isElevated = !_isElevated; // Toggle elevation state 
    }); 
  } 
  
  @override 
  Widget build(BuildContext context) { 
    return Scaffold( 
      appBar: AppBar( 
        title: Text('AnimatedPhysicalModel Demo'), // App bar title 
      ), 
      body: Center( 
        child: Column( 
          mainAxisAlignment: MainAxisAlignment.center, 
          children: <Widget>[ 
            AnimatedPhysicalModel( 
              duration: Duration(seconds: 1), // Animation duration 
              curve: Curves.easeInOut, // Animation curve 
              elevation: _isElevated ? 68.0 : 0.0, // Animate elevation 
              shape: BoxShape.rectangle, // Shape of the container 
              shadowColor: Colors.green, // Color of the shadow 
              color: Colors.green, // Color of the container 
              borderRadius: BorderRadius.circular(8.0), // Border radius 
              child: Container( 
                width: 200, 
                height: 200, 
                child: Center( 
                  child: Text( 
                    'Animated', 
                    style: TextStyle( 
                      color: Colors.white, 
                      fontSize: 24, 
                    ), 
                  ), 
                ), 
              ), 
            ), 
            SizedBox(height: 20), // Empty space between elements 
            ElevatedButton( 
              onPressed: _toggleElevation, // Button click handler 
              child: Text(_isElevated 
                  ? 'Remove Elevation'
                  : 'Add Elevation'), // Button text 
            ), 
          ], 
        ), 
      ), 
    ); 
  } 
} 

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( 
        primarySwatch: Colors.green, // Set the app's primary theme color 
      ), 
      debugShowCheckedModeBanner: false, 
      home: AnimatedPhysicalModelDemo(), 
    ); 
  } 
} 
  
class AnimatedPhysicalModelDemo extends StatefulWidget { 
  @override 
  _AnimatedPhysicalModelDemoState createState() => 
      _AnimatedPhysicalModelDemoState(); 
} 
  
class _AnimatedPhysicalModelDemoState extends State<AnimatedPhysicalModelDemo> { 
  bool _isElevated = false; 
  
  void _toggleElevation() { 
    setState(() { 
      _isElevated = !_isElevated; // Toggle elevation state 
    }); 
  } 
  
  @override 
  Widget build(BuildContext context) { 
    return Scaffold( 
      appBar: AppBar( 
        title: Text('AnimatedPhysicalModel Demo'), // App bar title 
      ), 
      body: Center( 
        child: Column( 
          mainAxisAlignment: MainAxisAlignment.center, 
          children: <Widget>[ 
            AnimatedPhysicalModel( 
              duration: Duration(seconds: 1), // Animation duration 
              curve: Curves.easeInOut, // Animation curve 
              elevation: _isElevated ? 68.0 : 0.0, // Animate elevation 
              shape: BoxShape.rectangle, // Shape of the container 
              shadowColor: Colors.green, // Color of the shadow 
              color: Colors.green, // Color of the container 
              borderRadius: BorderRadius.circular(8.0), // Border radius 
              child: Container( 
                width: 200, 
                height: 200, 
                child: Center( 
                  child: Text( 
                    'Animated', 
                    style: TextStyle( 
                      color: Colors.white, 
                      fontSize: 24, 
                    ), 
                  ), 
                ), 
              ), 
            ), 
            SizedBox(height: 20), // Empty space between elements 
            ElevatedButton( 
              onPressed: _toggleElevation, // Button click handler 
              child: Text(_isElevated 
                  ? 'Remove Elevation'
                  : 'Add Elevation'), // Button text 
            ), 
          ], 
        ), 
      ), 
    ); 
  } 
}