funwithflutter · August 10, 2021 20:24 · Aug 10, 2021
diff --git a/main.dart b/main.dart
@@ -0,0 +1,58 @@
+import 'package:flutter/material.dart';
+
+void main() => runApp(const MyApp());
+
+class MyApp extends StatelessWidget {
+  const MyApp({Key? key}) : super(key: key);
+
+  @override
+  Widget build(BuildContext context) {
+    return const MaterialApp(
+      title: 'Implicit Animation Example',
+      home: Scaffold(
+        body: Center(
+          child: Example(),
+        ),
+      ),
+    );
+  }
+}
+
+class Example extends StatefulWidget {
+  const Example({Key? key}) : super(key: key);
+
+  @override
+  _ExampleState createState() => _ExampleState();
+}
+
+class _ExampleState extends State<Example> {
+  static const double _startWidth = 100.0;
+  static const double _startHeight = 100.0;
+  static const Color _startColor = Colors.red;
+
+  double width = _startWidth;
+  double height = _startHeight;
+  Color color = _startColor;
+
+  void _animateContainer() {
+    setState(() {
+      width = (width == _startWidth) ? _startWidth * 2 : _startWidth;
+      height = (height == _startHeight) ? _startHeight * 2 : _startHeight;
+      color = (color == _startColor) ? Colors.blue : _startColor;
+    });
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return GestureDetector(
+      onTap: _animateContainer,
+      child: AnimatedContainer(
+        duration: const Duration(milliseconds: 600), // Play around with the duration of the animation
+        curve: Curves.linear,
+        width: width,
+        height: height,
+        color: color,
+      ),
+    );
+  }
+}