Display a list of companies, with filtering

lib/widget/company_list.dart

@@ -0,0 +1,106 @@
+
+import 'package:flutter/cupertino.dart';
+import 'package:flutter/material.dart';
+
+import 'package:InvenTree/api.dart';
+import 'package:InvenTree/inventree/company.dart';
+import 'package:InvenTree/widget/drawer.dart';
+
+class CompanyListWidget extends StatefulWidget {
+
+  @override
+  _CompanyListState createState() => _CompanyListState();
+
+}
+
+
+class _CompanyListState extends State<CompanyListWidget> {
+
+  var _companies = new List<InvenTreeCompany>();
+
+  var _filteredCompanies = new List<InvenTreeCompany>();
+
+  var _title = "Companies";
+
+  _CompanyListState() {
+    _requestData();
+  }
+
+  void _requestData() {
+
+    InvenTreeCompany().list().then((var companies) {
+
+      _companies.clear();
+
+      for (var c in companies) {
+        if (c is InvenTreeCompany) {
+          _companies.add(c);
+        }
+      }
+
+      setState(() {
+        _filterResults("");
+      });
+
+    });
+  }
+
+  void _filterResults(String text) {
+
+    if (text.isEmpty) {
+      _filteredCompanies = _companies;
+    } else {
+      _filteredCompanies = _companies.where((c) => c.filter(text)).toList();
+    }
+  }
+
+  Widget _showCompany(BuildContext context, int index) {
+
+      InvenTreeCompany company = _filteredCompanies[index];
+
+      return ListTile(
+        title: Text("${company.name}"),
+        subtitle: Text("${company.description}"),
+        leading: Image(
+            image: InvenTreeAPI().getImage(company.image),
+            width: 40,
+        ),
+        onTap: () {
+          if (company.pk > 0) {
+            InvenTreeCompany().get(company.pk).then((var c) {
+              print("Retrieved company: ${c.name}");
+            });
+          }
+        },
+      );
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+        appBar: AppBar(
+          title: Text("$_title"),
+        ),
+        drawer: new InvenTreeDrawer(context),
+        body: ListView(
+          children: <Widget>[
+            TextField(
+              decoration: InputDecoration(
+              hintText: 'Filter results',
+              ),
+              onChanged: (String text) {
+                setState(() {
+                  _filterResults(text);
+                });
+              },
+            ),
+            ListView.builder(
+              shrinkWrap: true,
+                physics: ClampingScrollPhysics(),
+                itemBuilder: _showCompany, itemCount: _filteredCompanies.length)
+          ],
+        )
+    );
+  }
+
+}