Refactor colors used in the app

lib/api_form.dart

@@ -1,5 +1,6 @@
 import 'package:font_awesome_flutter/font_awesome_flutter.dart';
 import 'package:inventree/api.dart';
+import 'package:inventree/app_colors.dart';
 import 'package:inventree/widget/dialogs.dart';
 import 'package:inventree/widget/fields.dart';
 import 'package:inventree/l10.dart';
@@ -120,14 +121,14 @@ class APIFormField {
     return new TextStyle(
       fontWeight: FontWeight.bold,
       fontSize: 18,
-      color: hasErrors() ? Color.fromRGBO(250, 50, 50, 1) : Color.fromRGBO(50, 50, 50, 1),
+      color: hasErrors() ? COLOR_DANGER : COLOR_GRAY,
     );
   }
 
   TextStyle _helperStyle() {
     return new TextStyle(
       fontStyle: FontStyle.italic,
-      color: hasErrors() ? Color.fromRGBO(205, 50, 50, 1) : Color.fromRGBO(50, 50, 50, 1),
+      color: hasErrors() ? COLOR_DANGER : COLOR_GRAY,
     );
   }
 
@@ -299,7 +300,7 @@ class _APIFormWidgetState extends State<APIFormWidget> {
               title: Text(
                 error,
                 style: TextStyle(
-                  color: Color.fromRGBO(250, 50, 50, 1),
+                  color: COLOR_DANGER,
                   fontStyle: FontStyle.italic,
                   fontSize: 16,
                 ),

lib/app_colors.dart

@@ -0,0 +1,17 @@
+
+
+import 'dart:ui';
+
+const Color COLOR_GRAY = Color.fromRGBO(50, 50, 50, 1);
+const Color COLOR_GRAY_LIGHT = Color.fromRGBO(150, 150, 150, 1);
+
+const Color COLOR_BLUE = Color.fromRGBO(0, 0, 250, 1);
+
+const Color COLOR_STAR = Color.fromRGBO(250, 250, 100, 1);
+
+const Color COLOR_WARNING = Color.fromRGBO(250, 150, 50, 1);
+const Color COLOR_DANGER = Color.fromRGBO(250, 50, 50, 1);
+const Color COLOR_SUCCESS = Color.fromRGBO(50, 250, 50, 1);
+const Color COLOR_PROGRESS = Color.fromRGBO(50, 50, 250, 1);
+
+const Color COLOR_SELECTED = Color.fromRGBO(0, 0, 0, 0.05);

lib/settings/login.dart

@@ -1,3 +1,4 @@
+import 'package:inventree/app_colors.dart';
 import 'package:inventree/widget/dialogs.dart';
 import 'package:inventree/widget/fields.dart';
 import 'package:inventree/widget/spinner.dart';
@@ -219,7 +220,7 @@ class _InvenTreeLoginSettingsState extends State<InvenTreeLoginSettingsWidget> {
     if ((InvenTreeAPI().profile?.key ?? '') != profile.key) {
       return FaIcon(
         FontAwesomeIcons.questionCircle,
-        color: Color.fromRGBO(250, 150, 50, 1)
+        color: COLOR_WARNING
       );
     }
 
@@ -227,17 +228,17 @@ class _InvenTreeLoginSettingsState extends State<InvenTreeLoginSettingsWidget> {
     if (InvenTreeAPI().isConnected()) {
       return FaIcon(
         FontAwesomeIcons.checkCircle,
-        color: Color.fromRGBO(50, 250, 50, 1)
+        color: COLOR_SUCCESS
       );
     } else if (InvenTreeAPI().isConnecting()) {
       return Spinner(
         icon: FontAwesomeIcons.spinner,
-        color: Color.fromRGBO(50, 50, 250, 1),
+        color: COLOR_PROGRESS,
       );
     } else {
       return FaIcon(
         FontAwesomeIcons.timesCircle,
-        color: Color.fromRGBO(250, 50, 50, 1),
+        color: COLOR_DANGER,
       );
     }
   }
@@ -255,7 +256,7 @@ class _InvenTreeLoginSettingsState extends State<InvenTreeLoginSettingsWidget> {
           title: Text(
             profile.name,
           ),
-          tileColor: profile.selected ? Color.fromRGBO(0, 0, 0, 0.05) : null,
+          tileColor: profile.selected ? COLOR_SELECTED : null,
           subtitle: Text("${profile.server}"),
           trailing: _getProfileIcon(profile),
           onTap: () {

lib/widget/home.dart

@@ -1,3 +1,4 @@
+import 'package:inventree/app_colors.dart';
 import 'package:inventree/user_profile.dart';
 import 'package:flutter/cupertino.dart';
 import 'package:flutter/material.dart';
@@ -131,7 +132,7 @@ class _InvenTreeHomePageState extends State<InvenTreeHomePage> {
         leading: FaIcon(FontAwesomeIcons.server),
         trailing: FaIcon(
           FontAwesomeIcons.user,
-          color: Color.fromRGBO(250, 50, 50, 1),
+          color: COLOR_DANGER,
         ),
         onTap: () {
           _selectProfile();
@@ -147,7 +148,7 @@ class _InvenTreeHomePageState extends State<InvenTreeHomePage> {
         leading: FaIcon(FontAwesomeIcons.server),
         trailing: Spinner(
           icon: FontAwesomeIcons.spinner,
-          color: Color.fromRGBO(50, 50, 250, 1),
+          color: COLOR_PROGRESS,
         ),
         onTap: () {
           _selectProfile();
@@ -160,7 +161,7 @@ class _InvenTreeHomePageState extends State<InvenTreeHomePage> {
         leading: FaIcon(FontAwesomeIcons.server),
         trailing: FaIcon(
           FontAwesomeIcons.checkCircle,
-          color: Color.fromRGBO(50, 250, 50, 1)
+          color: COLOR_SUCCESS
         ),
         onTap: () {
           _selectProfile();
@@ -173,7 +174,7 @@ class _InvenTreeHomePageState extends State<InvenTreeHomePage> {
         leading: FaIcon(FontAwesomeIcons.server),
         trailing: FaIcon(
           FontAwesomeIcons.timesCircle,
-          color: Color.fromRGBO(250, 50, 50, 1),
+          color: COLOR_DANGER,
         ),
         onTap: () {
           _selectProfile();

lib/widget/part_detail.dart

@@ -4,6 +4,7 @@ import 'package:flutter/cupertino.dart';
 import 'package:flutter/foundation.dart';
 import 'package:flutter/material.dart';
 import 'package:font_awesome_flutter/font_awesome_flutter.dart';
+import 'package:inventree/app_colors.dart';
 
 import 'package:inventree/l10.dart';
 import 'package:inventree/api_form.dart';
@@ -198,7 +199,7 @@ class _PartDisplayState extends RefreshableState<PartDetailWidget> {
           subtitle: Text("${part.description}"),
           trailing: IconButton(
             icon: FaIcon(part.starred ? FontAwesomeIcons.solidStar : FontAwesomeIcons.star,
-              color: part.starred ? Color.fromRGBO(250, 250, 100, 1) : null,
+              color: part.starred ? COLOR_STAR : null,
             ),
             onPressed: _toggleStar,
           ),
@@ -232,6 +233,29 @@ class _PartDisplayState extends RefreshableState<PartDetailWidget> {
       return tiles;
     }
 
+    if (!part.isActive) {
+      tiles.add(
+        ListTile(
+          title: Text(
+              L10().inactive,
+              style: TextStyle(
+                color: COLOR_DANGER
+              )
+          ),
+          subtitle: Text(
+            L10().inactiveDetail,
+            style: TextStyle(
+              color: COLOR_DANGER
+            )
+          ),
+          leading: FaIcon(
+              FontAwesomeIcons.exclamationCircle,
+              color: COLOR_DANGER
+          ),
+        )
+      );
+    }
+
     // Category information
     if (part.categoryName.isNotEmpty) {
       tiles.add(

lib/widget/spinner.dart

@@ -2,6 +2,7 @@ import 'package:flutter/material.dart';
 import 'package:flutter/cupertino.dart';
 
 import 'package:font_awesome_flutter/font_awesome_flutter.dart';
+import 'package:inventree/app_colors.dart';
 
 class Spinner extends StatefulWidget {
   final IconData? icon;
@@ -9,7 +10,7 @@ class Spinner extends StatefulWidget {
   final Color color;
 
   const Spinner({
-    this.color = const Color.fromRGBO(150, 150, 150, 1),
+    this.color = COLOR_GRAY_LIGHT,
     Key? key,
     @required this.icon,
     this.duration = const Duration(milliseconds: 1800),

lib/widget/stock_item_test_results.dart

@@ -1,3 +1,4 @@
+import 'package:inventree/app_colors.dart';
 import 'package:inventree/inventree/part.dart';
 import 'package:inventree/inventree/stock.dart';
 import 'package:inventree/inventree/model.dart';
@@ -207,7 +208,7 @@ class _StockItemTestResultDisplayState extends RefreshableState<StockItemTestRes
       String _value = "";
       String _notes = "";
 
-      FaIcon _icon = FaIcon(FontAwesomeIcons.questionCircle, color: Color.fromRGBO(0, 0, 250, 1));
+      FaIcon _icon = FaIcon(FontAwesomeIcons.questionCircle, color: COLOR_BLUE);
       bool _valueRequired = false;
       bool _attachmentRequired = false;
 
@@ -229,11 +230,11 @@ class _StockItemTestResultDisplayState extends RefreshableState<StockItemTestRes
 
       if (_result == true) {
         _icon = FaIcon(FontAwesomeIcons.checkCircle,
-          color: Color.fromRGBO(0, 250, 0, 0.8)
+          color: COLOR_SUCCESS,
         );
       } else if (_result == false) {
         _icon = FaIcon(FontAwesomeIcons.timesCircle,
-          color: Color.fromRGBO(250, 0, 0, 0.8)
+          color: COLOR_DANGER,
         );
       }