mwah

lib/main.dart

@@ -20,68 +20,83 @@ class MyApp extends StatelessWidget {
   }
 }
 
-///
-/// Shape Builder
-///
-abstract class ShapeBuilder {
-  Widget build(Size size, Widget child) {
-    return Container(
-      height: size.height,
-      width: size.width,
-      decoration: BoxDecoration(shape: boxShape, color: shapeColor),
-      child: Center(child: child),
+class LikeButtonDecorator extends StatelessWidget {
+  const LikeButtonDecorator({super.key, required this.child, required this.height, required this.width});
+
+  final Widget child;
+  final double height, width;
+
+  @override
+  Widget build(BuildContext context) {
+    return SizedBox(
+      height: height,
+      width: width,
+      child: Stack(
+        children: [
+          Center(child: child),
+          Padding(
+            padding: const EdgeInsets.all(2.0),
+            child: Align(
+              alignment: Alignment.topRight,
+              child: Container(
+                padding: const EdgeInsets.all(3.0),
+                decoration: const BoxDecoration(shape: BoxShape.circle, color: Colors.blue),
+                child: const Icon(Icons.thumb_up, color: Colors.white, size: 16),
+              ),
+            ),
+          ),
+        ],
+      ),
     );
   }
-
-  BoxShape get boxShape;
-  Color get shapeColor;
 }
 
-class RedSquareBuilder extends ShapeBuilder {
-  @override
-  BoxShape get boxShape => BoxShape.rectangle;
+class AnimatedPulsingBorderDecorator extends StatefulWidget {
+  const AnimatedPulsingBorderDecorator({super.key, required this.child});
+
+  final Widget child;
 
   @override
-  Color get shapeColor => Colors.red;
+  State<StatefulWidget> createState() => AnimatedPulsingBorderDecoratorState();
 }
 
-class BlueCircleBuilder extends ShapeBuilder {
-  @override
-  BoxShape get boxShape => BoxShape.circle;
+class AnimatedPulsingBorderDecoratorState extends State<AnimatedPulsingBorderDecorator>
+    with SingleTickerProviderStateMixin {
+  late final AnimationController controller;
+  late final Animation<double> paddingAnimation;
 
   @override
-  Color get shapeColor => Colors.blue;
-}
+  void initState() {
+    super.initState();
+    controller = AnimationController(
+      duration: const Duration(milliseconds: 750),
+      vsync: this,
+    );
+    paddingAnimation = Tween<double>(begin: 0.0, end: 3.0).animate(controller);
+    controller.repeat(reverse: true);
+  }
 
-///
-/// Message Builder (Writer seemed appropriate)
-///
-abstract class MessageWriter {
-  Text write(String text);
-}
-
-class HotMessageWriter extends MessageWriter {
   @override
-  Text write(String text) => Text(text, style: const TextStyle(fontWeight: FontWeight.bold, fontSize: 18));
-}
+  void dispose() {
+    super.dispose();
+    controller.dispose();
+  }
 
-class ColdMessageWriter extends MessageWriter {
   @override
-  Text write(String text) => Text(text, style: const TextStyle(color: Colors.white, fontSize: 14));
+  Widget build(BuildContext context) {
+    return AnimatedBuilder(
+      builder: (context, _) {
+        return Container(
+          padding: EdgeInsets.all(paddingAnimation.value),
+          decoration: BoxDecoration(color: Colors.amber, borderRadius: BorderRadius.circular(15.0)),
+          child: widget.child,
+        );
+      },
+      animation: paddingAnimation,
+    );
+  }
 }
 
-final List<ShapeBuilder> builders = [
-  RedSquareBuilder(),
-  BlueCircleBuilder(),
-  RedSquareBuilder(),
-];
-
-final List<MessageWriter> writers = [
-  ColdMessageWriter(),
-  HotMessageWriter(),
-  HotMessageWriter(),
-];
-
 class MyHomePage extends StatefulWidget {
   const MyHomePage({super.key});
 
@@ -95,20 +110,29 @@ class _MyHomePageState extends State<MyHomePage> {
     return Scaffold(
       appBar: AppBar(
         backgroundColor: Theme.of(context).colorScheme.inversePrimary,
-        title: const Text('Builders'),
+        title: const Text('Decorator'),
       ),
       body: Center(
         child: Column(
           mainAxisAlignment: MainAxisAlignment.center,
           children: <Widget>[
-            const Text('Builders!!'),
-            ...List.generate(
-              3,
-              (index) => builders[index].build(
-                Size(80.0 * (index + 1), 90.0 * (index + 1)),
-                writers[index].write('build ${index + 1}'),
-              ),
+            const Text(
+              'Decorators!!',
             ),
+            LikeButtonDecorator(
+                height: 30,
+                width: 160,
+                child: ElevatedButton(
+                  onPressed: () {},
+                  child: const SizedBox(
+                    height: 30,
+                    width: 160,
+                    child: Center(child: Text('Like Me!')),
+                  ),
+                )),
+            const SizedBox(height: 20),
+            AnimatedPulsingBorderDecorator(
+                child: ElevatedButton(onPressed: () {}, child: const Text('Pulsing goodness!!')))
           ],
         ),
       ),