From 50bb056e1fd4a253ba94d0297cfe9c34ac771f6a Mon Sep 17 00:00:00 2001
From: Michael Kauzmann <michael.kauzmann@colorado.edu>
Date: Tue, 14 May 2024 17:05:02 -0600
Subject: [PATCH] reset the expandedProperty,
 https://github.com/phetsims/buoyancy/issues/150

Signed-off-by: Michael Kauzmann <michael.kauzmann@colorado.edu>
---
 js/buoyancy/view/BuoyancyLabScreenView.ts   | 2 ++
 js/common/view/DensityBuoyancyScreenView.ts | 5 +++++
 2 files changed, 7 insertions(+)

diff --git a/js/buoyancy/view/BuoyancyLabScreenView.ts b/js/buoyancy/view/BuoyancyLabScreenView.ts
index e5261008..485c7339 100644
--- a/js/buoyancy/view/BuoyancyLabScreenView.ts
+++ b/js/buoyancy/view/BuoyancyLabScreenView.ts
@@ -81,6 +81,8 @@ export default class BuoyancyLabScreenView extends DensityBuoyancyScreenView<Buo
       tandem: fluidDisplacedAccordionBoxTandem
     } );
 
+    this.resetEmitter.addListener( () => fluidDisplacedAccordionBox.expandedProperty.reset() );
+
     const leftSideVBox = new VBox( {
       align: 'left',
       spacing: 5,
diff --git a/js/common/view/DensityBuoyancyScreenView.ts b/js/common/view/DensityBuoyancyScreenView.ts
index 490cceef..7dfb43f9 100644
--- a/js/common/view/DensityBuoyancyScreenView.ts
+++ b/js/common/view/DensityBuoyancyScreenView.ts
@@ -65,6 +65,7 @@ import DuckView from '../../buoyancy/view/DuckView.js';
 import NumberIO from '../../../../tandem/js/types/NumberIO.js';
 import Utils from '../../../../dot/js/Utils.js';
 import createObservableArray, { ObservableArray } from '../../../../axon/js/createObservableArray.js';
+import Emitter from '../../../../axon/js/Emitter.js';
 
 // constants
 const MARGIN = DensityBuoyancyCommonConstants.MARGIN;
@@ -114,6 +115,9 @@ export default class DensityBuoyancyScreenView<Model extends DensityBuoyancyMode
   // TODO: PhET-iO instrument for https://github.com/phetsims/density-buoyancy-common/issues/82
   protected waterLevelVolumeProperty: TReadOnlyProperty<number>;
 
+  // Called upon resetting
+  protected readonly resetEmitter = new Emitter();
+
   public constructor( model: Model, providedOptions: SelfOptions ) {
 
     const scaleIncrease = 3.5;
@@ -574,6 +578,7 @@ export default class DensityBuoyancyScreenView<Model extends DensityBuoyancyMode
       listener: () => {
         this.interruptSubtreeInput();
         model.reset();
+        this.resetEmitter.emit();
       },
       tandem: tandem.createTandem( 'resetAllButton' )
     } );