Add display for part information

- Very sparse currently

lib/inventree/model.dart

@@ -75,7 +75,13 @@ class InvenTreeModel {
     // TODO - Add "timeout"
     // TODO - Add error catching
 
-    var response = await InvenTreeAPI().get(path.join(URL, pk.toString()));
+    var addr = path.join(URL, pk.toString());
+
+    if (!addr.endsWith("/")) {
+      addr += "/";
+    }
+
+    var response = await InvenTreeAPI().get(addr);
 
     if (response.statusCode != 200) {
       print("Error retrieving data");

lib/widget/category_display.dart

@@ -1,5 +1,6 @@
 
 import 'package:InvenTree/inventree/part.dart';
+import 'package:InvenTree/widget/part_display.dart';
 import 'package:flutter/cupertino.dart';
 import 'package:flutter/foundation.dart';
 import 'package:flutter/material.dart';
@@ -87,10 +88,15 @@ class _CategoryDisplayState extends State<CategoryDisplayWidget> {
           children: <Widget>[
             Text(
               "Subcategories - ${_subcategories.length}",
+              textAlign: TextAlign.left,
+              style: TextStyle(fontWeight: FontWeight.bold),
             ),
             Expanded(child: SubcategoryList(_subcategories)),
             Divider(),
-            Text("Parts - ${_parts.length}"),
+            Text("Parts - ${_parts.length}",
+              textAlign: TextAlign.left,
+              style: TextStyle(fontWeight: FontWeight.bold),
+            ),
             Expanded(child: PartList(_parts)),
             Spacer(),
           ]
@@ -114,7 +120,6 @@ class SubcategoryList extends StatelessWidget {
     // Attempt to load the sub-category.
     InvenTreePartCategory().get(pk).then((var cat) {
       if (cat is InvenTreePartCategory) {
-        print("Found cat: <${cat.pk}> : ${cat.name} - ${cat.description}");
 
         Navigator.push(context, MaterialPageRoute(builder: (context) => CategoryDisplayWidget(cat)));
       }
@@ -157,6 +162,16 @@ class PartList extends StatelessWidget {
 
   PartList(this._parts);
 
+  void _openPart(BuildContext context, int pk) {
+    // Attempt to load the part information
+    InvenTreePart().get(pk).then((var part) {
+      if (part is InvenTreePart) {
+
+        Navigator.push(context, MaterialPageRoute(builder: (context) => PartDisplayWidget(part)));
+      }
+    });
+  }
+
   Widget _build(BuildContext context, int index) {
     InvenTreePart part;
 
@@ -165,10 +180,15 @@ class PartList extends StatelessWidget {
     }
 
     return Card(
-      child: Column(
-        children: <Widget> [
-          Text('${part.name} - ${part.description}'),
-        ]
+      child: InkWell(
+        child: Column(
+          children: <Widget> [
+            Text('${part.name} - ${part.description}'),
+          ]
+        ),
+        onTap: () {
+          _openPart(context, part.pk);
+        },
       )
     );
   }

lib/widget/part_display.dart

@@ -0,0 +1,51 @@
+
+import 'package:InvenTree/inventree/part.dart';
+import 'package:flutter/cupertino.dart';
+import 'package:flutter/foundation.dart';
+import 'package:flutter/material.dart';
+
+class PartDisplayWidget extends StatefulWidget {
+
+  PartDisplayWidget(this.part, {Key key}) : super(key: key);
+
+  final InvenTreePart part;
+
+  @override
+  _PartDisplayState createState() => _PartDisplayState(part);
+
+}
+
+
+class _PartDisplayState extends State<PartDisplayWidget> {
+
+  _PartDisplayState(this.part) {
+    // TODO
+  }
+
+  final InvenTreePart part;
+
+  String get _title {
+    if (part == null) {
+      return "Part";
+    } else {
+      return "Part '${part.name}'";
+    }
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      appBar: AppBar(
+        title: Text(_title),
+      ),
+      body: Center(
+        child: Column(
+          mainAxisAlignment: MainAxisAlignment.center,
+          children: <Widget>[
+            Text("Description: ${part.description}"),
+          ]
+        ),
+      )
+    );
+  }
+}