Add new list widgets

- PartCategory
- StockLocation

lib/widget/category_list.dart

@@ -0,0 +1,85 @@
+
+
+import 'package:flutter/cupertino.dart';
+import 'package:flutter/material.dart';
+import 'package:font_awesome_flutter/font_awesome_flutter.dart';
+import 'package:inventree/inventree/model.dart';
+import 'package:inventree/inventree/part.dart';
+import 'package:inventree/widget/category_display.dart';
+import 'package:inventree/widget/paginator.dart';
+import 'package:inventree/widget/part_list.dart';
+
+import 'package:inventree/widget/refreshable_state.dart';
+import "package:inventree/l10.dart";
+
+class PartCategoryList extends StatefulWidget {
+
+  const PartCategoryList(this.filters);
+
+  final Map<String, String> filters;
+
+  @override
+  _PartCategoryListState createState() => _PartCategoryListState(filters);
+
+}
+
+
+class _PartCategoryListState extends RefreshableState<PartCategoryList> {
+
+  _PartCategoryListState(this.filters);
+
+  final Map<String, String> filters;
+
+  @override
+  String getAppBarTitle(BuildContext context) => L10().partCategories;
+
+  @override
+  Widget getBody(BuildContext context) {
+    return PaginatedPartCategoryList(filters);
+  }
+}
+
+
+class PaginatedPartCategoryList extends StatefulWidget {
+
+  const PaginatedPartCategoryList(this.filters);
+
+  final Map<String, String> filters;
+
+  @override
+  _PaginatedPartCategoryListState createState() => _PaginatedPartCategoryListState(filters);
+}
+
+
+class _PaginatedPartCategoryListState extends PaginatedSearchState<PaginatedPartCategoryList> {
+
+  _PaginatedPartCategoryListState(Map<String, String> filters) : super(filters);
+
+  @override
+  Future<InvenTreePageResponse?> requestPage(int limit, int offset, Map<String, String> params) async {
+
+    final page = await InvenTreePartCategory().listPaginated(limit, offset, filters: params);
+
+    return page;
+  }
+
+  @override
+  Widget buildItem(BuildContext context, InvenTreeModel model) {
+
+    InvenTreePartCategory category = model as InvenTreePartCategory;
+
+    return ListTile(
+      title: Text(category.name),
+      subtitle: Text(category.pathstring),
+      trailing: Text("${category.partcount}"),
+      onTap: () {
+        Navigator.push(
+          context,
+          MaterialPageRoute(
+            builder: (context) => CategoryDisplayWidget(category)
+          )
+        );
+      },
+    );
+  }
+}