debug view && priority in listview

flutter/lib/pages/debug/debug_main.dart

@@ -0,0 +1,64 @@
+import 'package:flutter/material.dart';
+import 'package:simplecloudnotifier/components/layout/scaffold.dart';
+import 'package:simplecloudnotifier/pages/debug/debug_colors.dart';
+import 'package:simplecloudnotifier/pages/debug/debug_persistence.dart';
+import 'package:simplecloudnotifier/pages/debug/debug_requests.dart';
+
+class DebugMainPage extends StatefulWidget {
+  @override
+  _DebugMainPageState createState() => _DebugMainPageState();
+}
+
+enum DebugMainPageSubPage { colors, requests, persistence }
+
+class _DebugMainPageState extends State<DebugMainPage> {
+  final Map<DebugMainPageSubPage, Widget> _subpages = {
+    DebugMainPageSubPage.colors: DebugColorsPage(),
+    DebugMainPageSubPage.requests: DebugRequestsPage(),
+    DebugMainPageSubPage.persistence: DebugPersistencePage(),
+  };
+
+  DebugMainPageSubPage _subPage = DebugMainPageSubPage.colors;
+
+  @override
+  Widget build(BuildContext context) {
+    return SCNScaffold(
+      title: 'Debug',
+      showSearch: false,
+      showDebug: false,
+      child: Column(
+        children: [
+          Padding(
+            padding: const EdgeInsets.all(16.0),
+            child: Row(
+              mainAxisAlignment: MainAxisAlignment.center,
+              children: [
+                buildSegButton(context),
+              ],
+            ),
+          ),
+          Expanded(
+            child: _subpages[_subPage]!,
+          ),
+        ],
+      ),
+    );
+  }
+
+  Widget buildSegButton(BuildContext context) {
+    return SegmentedButton<DebugMainPageSubPage>(
+      showSelectedIcon: false,
+      segments: const <ButtonSegment<DebugMainPageSubPage>>[
+        ButtonSegment<DebugMainPageSubPage>(value: DebugMainPageSubPage.colors, label: Text('Theme')),
+        ButtonSegment<DebugMainPageSubPage>(value: DebugMainPageSubPage.requests, label: Text('Requests')),
+        ButtonSegment<DebugMainPageSubPage>(value: DebugMainPageSubPage.persistence, label: Text('Persistence')),
+      ],
+      selected: <DebugMainPageSubPage>{_subPage},
+      onSelectionChanged: (Set<DebugMainPageSubPage> v) {
+        setState(() {
+          _subPage = v.first;
+        });
+      },
+    );
+  }
+}