Adds new custom widget for displaying Bill of Materials data

lib/widget/bom_list.dart

@@ -0,0 +1,113 @@
+
+
+import "package:flutter/material.dart";
+
+import "package:inventree/api.dart";
+import "package:inventree/helpers.dart";
+import "package:inventree/inventree/bom.dart";
+import "package:inventree/l10.dart";
+
+import "package:inventree/inventree/model.dart";
+import "package:inventree/inventree/part.dart";
+
+import "package:inventree/widget/paginator.dart";
+import "package:inventree/widget/part_detail.dart";
+import "package:inventree/widget/refreshable_state.dart";
+
+
+/*
+ * Widget for displaying a list of BomItems for the specified 'parent' Part instance
+ */
+class BomList extends StatefulWidget {
+
+  const BomList(this.parent);
+
+  final InvenTreePart parent;
+
+  @override
+  _BomListState createState() => _BomListState(parent);
+
+}
+
+
+class _BomListState extends RefreshableState<BomList> {
+
+  _BomListState(this.parent);
+
+  final InvenTreePart parent;
+
+  @override
+  String getAppBarTitle(BuildContext context) => L10().billOfMaterials;
+
+  @override
+  Widget getBody(BuildContext context) {
+    return PaginatedBomList({
+      "part": parent.pk.toString(),
+    });
+  }
+}
+
+
+/*
+ * Create a paginated widget displaying a list of BomItem objects
+ */
+class PaginatedBomList extends StatefulWidget {
+
+  const PaginatedBomList(this.filters, {this.onTotalChanged});
+
+  final Map<String, String> filters;
+
+  final Function(int)? onTotalChanged;
+
+  @override
+  _PaginatedBomListState createState() => _PaginatedBomListState(filters, onTotalChanged);
+
+}
+
+
+class _PaginatedBomListState extends PaginatedSearchState<PaginatedBomList> {
+
+  _PaginatedBomListState(Map<String, String> filters, this.onTotalChanged) : super(filters);
+
+  Function(int)? onTotalChanged;
+
+  @override
+  Future<InvenTreePageResponse?> requestPage(int limit, int offset, Map<String, String> params) async {
+
+    final page = await InvenTreeBomItem().listPaginated(limit, offset, filters: params);
+
+    return page;
+  }
+
+  @override
+  Widget buildItem(BuildContext context, InvenTreeModel model) {
+
+    InvenTreeBomItem bomItem = model as InvenTreeBomItem;
+
+    InvenTreePart? subPart = bomItem.subPart;
+
+    String title = subPart?.fullname ?? "error - no name";
+    String description = subPart?.description ?? "error - no description";
+
+    return ListTile(
+      title: Text(title),
+      subtitle: Text(description),
+      trailing: Text(
+        simpleNumberString(bomItem.quantity),
+        style: TextStyle(fontWeight: FontWeight.bold),
+      ),
+      leading: InvenTreeAPI().getImage(
+        subPart?.thumbnail ?? "",
+        width: 40,
+        height: 40,
+      ),
+      onTap: subPart == null ? null : () async {
+        InvenTreePart().get(bomItem.subPartId).then((var part) {
+          if (part is InvenTreePart) {
+            Navigator.push(context, MaterialPageRoute(builder: (context) => PartDetailWidget(part)));
+          }
+        });
+      },
+    );
+  }
+}