Add a 'login setings' form

lib/login_settings.dart

@@ -0,0 +1,113 @@
+import 'package:flutter/material.dart';
+
+
+class InvenTreeLoginSettingsWidget extends StatefulWidget {
+
+  @override
+  _InvenTreeLoginSettingsState createState() => _InvenTreeLoginSettingsState();
+}
+
+
+class _InvenTreeLoginSettingsState extends State<InvenTreeLoginSettingsWidget> {
+
+  final GlobalKey<FormState> _formKey = new GlobalKey<FormState>();
+
+  String _addr;
+  String _user;
+  String _pass;
+
+  String _validateServer(String value) {
+
+    if (value.isEmpty) {
+      return 'Server cannot be empty';
+    }
+
+    return null;
+  }
+
+  String _validateUsername(String value) {
+    if (value.isEmpty) {
+      return 'Username cannot be empty';
+    }
+
+    return null;
+  }
+
+  String _validatePassword(String value) {
+    if (value.isEmpty) {
+      return 'Password cannot be empty';
+    }
+
+    return null;
+  }
+
+  @override
+  Widget build(BuildContext context) {
+
+    final Size screenSize = MediaQuery.of(context).size;
+
+    return Scaffold(
+      appBar: AppBar(
+        title: Text("Login Settings"),
+      ),
+      body: new Container(
+        padding: new EdgeInsets.all(20.0),
+        child: new Form(
+          key: _formKey,
+          child: new ListView(
+            children: <Widget>[
+              Text("Server"),
+              new TextFormField(
+                decoration: InputDecoration(
+                  hintText: "127.0.0.1:8000",
+                  labelText: "Server:Port",
+                ),
+                validator: _validateServer,
+                onSaved: (String value) {
+                  _addr = value;
+                },
+              ),
+              Text("Login Details"),
+              TextFormField(
+                decoration: InputDecoration(
+                  hintText: "Username",
+                  labelText: "Username",
+                ),
+                validator: _validateUsername,
+                onSaved: (String value) {
+                  _user = value;
+                }
+              ),
+              TextFormField(
+                obscureText: true,
+                decoration: InputDecoration(
+                  hintText: "Password",
+                  labelText: "Password",
+                ),
+                validator: _validatePassword,
+                onSaved: (String value) {
+                  _pass = value;
+                },
+              ),
+              Container(
+                width: screenSize.width,
+                child: RaisedButton(
+                  child: Text("Login"),
+                  onPressed: this.save,
+                )
+              )
+            ],
+          )
+        )
+      )
+    );
+  }
+
+  void save() {
+    if (_formKey.currentState.validate()) {
+      _formKey.currentState.save();
+
+      // TODO - Save the login settings
+    }
+  }
+}

lib/settings.dart

@@ -1,5 +1,7 @@
 import 'package:flutter/material.dart';
 
+import 'login_settings.dart';
+
 class InvenTreeSettingsWidget extends StatefulWidget {
   // InvenTree settings view
 
@@ -31,6 +33,6 @@ class _InvenTreeSettingsState extends State<InvenTreeSettingsWidget> {
   }
 
   void _editServerSettings() {
-
+    Navigator.push(context, MaterialPageRoute(builder: (context) => InvenTreeLoginSettingsWidget()));
   }
 }