backup.

lib/widgets/general/navigationbar.dart

@@ -0,0 +1,37 @@
+
+import 'package:flutter/material.dart';
+import 'package:flutter_wisetronic/widgets/desktop/desktop_navigationbar.dart';
+import 'package:flutter_wisetronic/widgets/mobile/mobile_navigationbar.dart';
+import 'package:responsive_builder/responsive_builder.dart';
+
+class NavigationBar extends StatefulWidget implements PreferredSizeWidget {
+  final Key key;
+  final PreferredSizeWidget bottom;
+
+  NavigationBar({Key key, PreferredSizeWidget bottom})
+      : key = key,
+        preferredSize = Size.fromHeight(kToolbarHeight + (bottom?.preferredSize?.height ?? 0.0)),
+        bottom = bottom;
+
+  @override
+  final Size preferredSize;
+
+  @override
+  State<StatefulWidget> createState() {
+    return NavigationBarState();
+  }
+
+}
+
+class NavigationBarState extends State<NavigationBar> {
+
+  @override
+  Widget build(BuildContext context) {
+    return ScreenTypeLayout(
+      mobile: MobileNavigationBar(),
+      tablet: DesktopNavigationBar(),
+      desktop: DesktopNavigationBar(),
+    );
+  }
+
+}