Move the "edit" button to the app bar

lib/widget/part_detail.dart

@@ -32,6 +32,18 @@ class _PartDisplayState extends RefreshableState<PartDetailWidget> {
   @override
   String getAppBarTitle(BuildContext context) { return "Part"; }
 
+  @override
+  List<Widget> getAppBarActions(BuildContext context) {
+    return <Widget>[
+      // TODO: Hide the 'edit' button if the user does not have permission!!
+      IconButton(
+        icon: FaIcon(FontAwesomeIcons.edit),
+        tooltip: 'Edit',
+        onPressed: _editPartDialog,
+      )
+    ];
+  }
+
   _PartDisplayState(this.part) {
     // TODO
   }
@@ -114,6 +126,7 @@ class _PartDisplayState extends RefreshableState<PartDetailWidget> {
         StringField(
           label: "Internal Part Number",
           initial: part.IPN,
+          allowEmpty: true,
           onSaved: (value) => _ipn = value,
         )
 
@@ -136,10 +149,6 @@ class _PartDisplayState extends RefreshableState<PartDetailWidget> {
           title: Text("${part.fullname}"),
           subtitle: Text("${part.description}"),
           leading: InvenTreeAPI().getImage(part.thumbnail),
-          trailing: IconButton(
-            icon: FaIcon(FontAwesomeIcons.edit),
-            onPressed: _editPartDialog,
-          ),
         )
       )
     );

lib/widget/refreshable_state.dart

@@ -11,6 +11,10 @@ abstract class RefreshableState<T extends StatefulWidget> extends State<T> {
   // Storage for context once "Build" is called
   BuildContext context;
 
+  List<Widget> getAppBarActions(BuildContext context) {
+    return [];
+  }
+
   String getAppBarTitle(BuildContext context) { return "App Bar Title"; }
 
   void initState() {
@@ -37,6 +41,7 @@ abstract class RefreshableState<T extends StatefulWidget> extends State<T> {
   AppBar getAppBar(BuildContext context) {
     return AppBar(
       title: Text(getAppBarTitle(context)),
+      actions: getAppBarActions(context),
     );
   }
 

lib/widget/stock_detail.dart

@@ -37,6 +37,18 @@ class _StockItemDisplayState extends RefreshableState<StockDetailWidget> {
   @override
   String getAppBarTitle(BuildContext context) { return "Stock Item"; }
 
+  @override
+  List<Widget> getAppBarActions(BuildContext context) {
+    return <Widget>[
+      // TODO: Hide the 'edit' button if the user does not have permission!!
+      IconButton(
+        icon: FaIcon(FontAwesomeIcons.edit),
+        tooltip: "Edit",
+        onPressed: _editStockItemDialog,
+      )
+    ];
+  }
+
   final TextEditingController _quantityController = TextEditingController();
   final TextEditingController _notesController = TextEditingController();
 
@@ -333,10 +345,6 @@ class _StockItemDisplayState extends RefreshableState<StockDetailWidget> {
           title: Text("${item.partName}"),
           subtitle: Text("${item.partDescription}"),
           leading: InvenTreeAPI().getImage(item.partImage),
-          trailing: IconButton(
-            icon: FaIcon(FontAwesomeIcons.edit),
-            onPressed: _editStockItemDialog,
-          )
         )
       )
     );