Adds new custom widget for displaying Bill of Materials data

lib/inventree/bom.dart

@@ -0,0 +1,69 @@
+
+
+import "package:inventree/inventree/model.dart";
+import "package:inventree/inventree/part.dart";
+
+/*
+ * Class representing the BomItem database model
+ */
+class InvenTreeBomItem extends InvenTreeModel {
+
+  InvenTreeBomItem() : super();
+
+  InvenTreeBomItem.fromJson(Map<String, dynamic> json) : super.fromJson(json);
+
+  @override
+  InvenTreeModel createFromJson(Map<String, dynamic> json) {
+    return InvenTreeBomItem.fromJson(json);
+  }
+
+  @override
+  String get URL => "bom/";
+
+  @override
+  Map<String, String> defaultListFilters() {
+    return {
+      "sub_part_detail": "true",
+    };
+  }
+
+  @override
+  Map<String, String> defaultGetFilters() {
+    return {
+      "sub_part_detail": "true",
+    };
+  }
+
+  // Extract the 'quantity' value associated with this BomItem
+  double get quantity => double.tryParse(jsondata["quantity"].toString()) ?? 0;
+
+  // Extract the ID of the related part
+  int get partId => int.tryParse(jsondata["part"].toString()) ?? -1;
+
+  // Return a Part instance for the referenced part
+  InvenTreePart? get part {
+    if (jsondata.containsKey("part_detail")) {
+      dynamic data = jsondata["part_detail"] ?? {};
+      if (data is Map<String, dynamic>) {
+        return InvenTreePart.fromJson(data);
+      }
+    }
+
+    return null;
+  }
+
+  // Return a Part instance for the referenced sub-part
+  InvenTreePart? get subPart {
+    if (jsondata.containsKey("sub_part_detail")) {
+      dynamic data = jsondata["sub_part_detail"] ?? {};
+      if (data is Map<String, dynamic>) {
+        return InvenTreePart.fromJson(data);
+      }
+    }
+
+    return null;
+}
+
+  // Extract the ID of the related sub-part
+  int get subPartId => int.tryParse(jsondata["sub_part"].toString()) ?? -1;
+}

lib/inventree/part.dart

@@ -10,6 +10,9 @@ import "package:inventree/l10.dart";
 import "package:inventree/inventree/model.dart";
 
 
+/*
+ * Class representing the PartCategory database model
+ */
 class InvenTreePartCategory extends InvenTreeModel {
 
   InvenTreePartCategory() : super();
@@ -70,6 +73,9 @@ class InvenTreePartCategory extends InvenTreeModel {
 }
 
 
+/*
+ * Class representing the PartTestTemplate database model
+ */
 class InvenTreePartTestTemplate extends InvenTreeModel {
 
   InvenTreePartTestTemplate() : super();
@@ -122,6 +128,9 @@ class InvenTreePartTestTemplate extends InvenTreeModel {
 }
 
 
+/*
+ * Class representing the Part database model
+ */
 class InvenTreePart extends InvenTreeModel {
 
   InvenTreePart() : super();
@@ -219,7 +228,6 @@ class InvenTreePart extends InvenTreeModel {
     return _supplierParts;
   }
 
-
   // Cached list of test templates
   List<InvenTreePartTestTemplate> testingTemplates = [];
 

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)));
+          }
+        });
+      },
+    );
+  }
+}

lib/widget/part_detail.dart

@@ -10,6 +10,7 @@ import "package:inventree/helpers.dart";
 import "package:inventree/inventree/part.dart";
 
 import "package:inventree/widget/attachment_widget.dart";
+import "package:inventree/widget/bom_list.dart";
 import "package:inventree/widget/part_list.dart";
 import "package:inventree/widget/part_notes.dart";
 import "package:inventree/widget/progress.dart";
@@ -136,8 +137,6 @@ class _PartDisplayState extends RefreshableState<PartDetailWidget> {
         "variant_of": part.pk.toString(),
       }
     );
-
-    print("Variant count: ${variantCount}");
   }
 
   Future <void> _toggleStar() async {
@@ -286,7 +285,7 @@ class _PartDisplayState extends RefreshableState<PartDetailWidget> {
       tiles.add(
           ListTile(
             title: Text(L10().variants),
-            leading: FaIcon(FontAwesomeIcons.sitemap, color: COLOR_CLICK),
+            leading: FaIcon(FontAwesomeIcons.shapes, color: COLOR_CLICK),
             trailing: Text(variantCount.toString()),
             onTap: () {
               Navigator.push(
@@ -310,7 +309,12 @@ class _PartDisplayState extends RefreshableState<PartDetailWidget> {
         title: Text(L10().availableStock),
         subtitle: Text(L10().stockDetails),
         leading: FaIcon(FontAwesomeIcons.boxes, color: COLOR_CLICK),
-        trailing: Text(part.stockString()),
+        trailing: Text(
+          part.stockString(),
+          style: TextStyle(
+            fontWeight: FontWeight.bold,
+          ),
+        ),
         onTap: () {
           setState(() {
             tabIndex = 1;
@@ -350,12 +354,7 @@ class _PartDisplayState extends RefreshableState<PartDetailWidget> {
                   Navigator.push(
                     context,
                     MaterialPageRoute(
-                      builder: (context) => PartList(
+                      builder: (context) => BomList(part)
-                        {
-                          "in_bom_for": part.pk.toString(),
-                        },
-                        title: L10().billOfMaterials,
-                      )
                     )
                   );
                 }