Allow for the AllFilledNode to show again after it resets.

#135

Author: Denz1994

js/common/model/KitCollection.js

@@ -139,6 +139,7 @@ define( require => {
       this.collectionBoxes.forEach( box => { box.reset(); } );
       this.kits.forEach( kit => { kit.reset(); } );
       this.hasBlinkedOnce = false;
+      this.allCollectionBoxesFilledProperty.reset();
     }
   }
 

js/common/view/BAMScreenView.js

@@ -153,9 +153,9 @@ define( require => {
           kitPanel.reset();
           this.updateRefillButton();
 
-          // If the nextCollectionButton is present on screen dispose it.
+          // If the nextCollectionButton is present on screen hide it.
           if ( this.children.includes( this.nextCollectionButton ) ) {
-            this.removeChild( this.nextCollectionButton );
+            this.nextCollectionButton.visible = false
           }
         },
         right: this.layoutBounds.right - BAMConstants.VIEW_PADDING * 1.3,

js/common/view/MoleculeCollectingScreenView.js

@@ -37,6 +37,9 @@ define( require => {
       super( kitCollectionList );
       this.kitCollectionList = kitCollectionList;
 
+      // @private
+      this.hasShownOnce = false;
+
       // @private {TextPushButton} Create a next collection button
       this.nextCollectionButton = new TextPushButton( nextCollectionString, {
         centerX: this.layoutBounds.centerX - 100,
@@ -110,6 +113,11 @@ define( require => {
       // notify attachment
       collectionAttachmentCallbacks.forEach( callback => { callback(); } );
 
+      // Affects whether the AllFilledNode will show after resetting.
+      this.resetAllButton.addListener( () => {
+        this.hasShownOnce = false;
+      } );
+
       // Adjust the center of the AllFilledNode
       this.visibleBoundsProperty.link( () => {
         this.allFilledNode.center = BAMConstants.STAGE_SIZE.center;
@@ -124,14 +132,14 @@ define( require => {
      */
     addCollection( collection ) {
       const kitCollectionNode = BAMScreenView.prototype.addCollection.call( this, collection, true );
-      let hasShownOnce = false;
+      this.hasShownOnce = false;
 
       // show dialog the 1st time all collection boxes are filled
       collection.allCollectionBoxesFilledProperty.link( filled => {
         if ( filled ) {
-          if ( !hasShownOnce ) {
+          if ( !this.hasShownOnce ) {
             this.allFilledNode.show();
-            hasShownOnce = true;
+            this.hasShownOnce = true;
           }
         }
       } );