feat: included Kicker sandbox

packages/pinball_components/sandbox/lib/main.dart

@@ -6,6 +6,7 @@
 // https://opensource.org/licenses/MIT.
 import 'package:dashbook/dashbook.dart';
 import 'package:flutter/material.dart';
+import 'package:sandbox/stories/kicker/stories.dart';
 import 'package:sandbox/stories/stories.dart';
 
 void main() {
@@ -19,5 +20,6 @@ void main() {
   addBaseboardStories(dashbook);
   addChromeDinoStories(dashbook);
   addDashNestBumperStories(dashbook);
+  addKickerStories(dashbook);
   runApp(dashbook);
 }

packages/pinball_components/sandbox/lib/stories/kicker/kicker_game.dart

@@ -0,0 +1,41 @@
+import 'dart:ui';
+
+import 'package:flame/extensions.dart';
+import 'package:pinball_components/pinball_components.dart';
+import 'package:sandbox/common/common.dart';
+import 'package:sandbox/stories/ball/basic_ball_game.dart';
+
+class KickerGame extends BasicBallGame {
+  KickerGame({
+    required this.trace,
+  }) : super(color: const Color(0xFFFF0000));
+
+  static const info = '''
+    Shows how Kickers are rendered.
+
+    - Activate the "trace" parameter to overlay the body.
+    - Tap anywhere on the screen to spawn a ball into the game.
+''';
+
+  final bool trace;
+
+  @override
+  Future<void> onLoad() async {
+    await super.onLoad();
+
+    final center = screenToWorld(camera.viewport.canvasSize! / 2);
+
+    final leftKicker = Kicker(side: BoardSide.left)
+      ..initialPosition = Vector2(center.x - (Kicker.size.x * 2), center.y);
+    await add(leftKicker);
+
+    final rightKicker = Kicker(side: BoardSide.right)
+      ..initialPosition = Vector2(center.x + (Kicker.size.x * 2), center.y);
+    await add(rightKicker);
+
+    if (trace) {
+      leftKicker.trace();
+      rightKicker.trace();
+    }
+  }
+}

packages/pinball_components/sandbox/lib/stories/kicker/stories.dart

@@ -0,0 +1,17 @@
+import 'package:dashbook/dashbook.dart';
+import 'package:flame/game.dart';
+import 'package:sandbox/common/common.dart';
+import 'package:sandbox/stories/kicker/kicker_game.dart';
+
+void addKickerStories(Dashbook dashbook) {
+  dashbook.storiesOf('Kickers').add(
+        'Basic',
+        (context) => GameWidget(
+          game: KickerGame(
+            trace: context.boolProperty('Trace', true),
+          ),
+        ),
+        codeLink: buildSourceLink('kicker_game/basic.dart'),
+        info: KickerGame.info,
+      );
+}