fix: show checked

Author: KyoheiG3

playbook/lib/src/scenario_widget.dart

@@ -24,6 +24,7 @@ class ScenarioWidget extends StatelessWidget {
       child: scenario.child,
     );
 
+    final color = checkeredColor != null ? canvasColor : null;
     final content = checkeredColor != null
         ? Checkered(
             rectSize: checkeredRectSize ?? 5,
@@ -34,11 +35,11 @@ class ScenarioWidget extends StatelessWidget {
 
     return useMaterial
         ? Material(
-            color: canvasColor,
+            color: color,
             child: content,
           )
         : Container(
-            color: canvasColor,
+            color: color,
             child: content,
           );
   }

playbook_ui/lib/src/scenario_container.dart

@@ -47,7 +47,12 @@ class ScenarioContainer extends StatelessWidget {
                               // Because we may have multiple heroes
                               // that share the same tag
                               enabled: false,
-                              child: scenario.child,
+                              child: ScenarioWidget(
+                                canvasColor: canvasColor,
+                                checkeredColor: checkeredColor,
+                                useMaterial: false,
+                                scenario: scenario,
+                              ),
                             ),
                           ),
                         ),