button [nfc]: Move AnimatedScaleOnTap to new file lib/widgets/button.dart

Author: chrisbobbe

lib/widgets/button.dart

@@ -0,0 +1,47 @@
+import 'package:flutter/widgets.dart';
+
+/// Apply [Transform.scale] to the child widget when tapped, and reset its scale
+/// when released, while animating the transitions.
+class AnimatedScaleOnTap extends StatefulWidget {
+  const AnimatedScaleOnTap({
+    super.key,
+    required this.scaleEnd,
+    required this.duration,
+    required this.child,
+  });
+
+  /// The terminal scale to animate to.
+  final double scaleEnd;
+
+  /// The duration over which to animate the scale change.
+  final Duration duration;
+
+  final Widget child;
+
+  @override
+  State<AnimatedScaleOnTap> createState() => _AnimatedScaleOnTapState();
+}
+
+class _AnimatedScaleOnTapState extends State<AnimatedScaleOnTap> {
+  double _scale = 1;
+
+  void _changeScale(double scale) {
+    setState(() {
+      _scale = scale;
+    });
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return GestureDetector(
+      behavior: HitTestBehavior.translucent,
+      onTapDown: (_) =>  _changeScale(widget.scaleEnd),
+      onTapUp: (_) =>    _changeScale(1),
+      onTapCancel: () => _changeScale(1),
+      child: AnimatedScale(
+        scale: _scale,
+        duration: widget.duration,
+        curve: Curves.easeOut,
+        child: widget.child));
+  }
+}

lib/widgets/home.dart

@@ -8,6 +8,7 @@ import 'about_zulip.dart';
 import 'action_sheet.dart';
 import 'app.dart';
 import 'app_bar.dart';
+import 'button.dart';
 import 'color.dart';
 import 'content.dart';
 import 'icons.dart';
@@ -601,49 +602,3 @@ class _AboutZulipButton extends _MenuButton {
     Navigator.of(context).push(AboutZulipPage.buildRoute(context));
   }
 }
-
-/// Apply [Transform.scale] to the child widget when tapped, and reset its scale
-/// when released, while animating the transitions.
-class AnimatedScaleOnTap extends StatefulWidget {
-  const AnimatedScaleOnTap({
-    super.key,
-    required this.scaleEnd,
-    required this.duration,
-    required this.child,
-  });
-
-  /// The terminal scale to animate to.
-  final double scaleEnd;
-
-  /// The duration over which to animate the scale change.
-  final Duration duration;
-
-  final Widget child;
-
-  @override
-  State<AnimatedScaleOnTap> createState() => _AnimatedScaleOnTapState();
-}
-
-class _AnimatedScaleOnTapState extends State<AnimatedScaleOnTap> {
-  double _scale = 1;
-
-  void _changeScale(double scale) {
-    setState(() {
-      _scale = scale;
-    });
-  }
-
-  @override
-  Widget build(BuildContext context) {
-    return GestureDetector(
-      behavior: HitTestBehavior.translucent,
-      onTapDown: (_) =>  _changeScale(widget.scaleEnd),
-      onTapUp: (_) =>    _changeScale(1),
-      onTapCancel: () => _changeScale(1),
-      child: AnimatedScale(
-        scale: _scale,
-        duration: widget.duration,
-        curve: Curves.easeOut,
-        child: widget.child));
-  }
-}