feat: custom initial time

example/lib/main.dart

@@ -25,9 +25,9 @@ class SetAlarm extends StatefulWidget {
 }
 
 class _SetAlarmState extends State<SetAlarm> {
-  String alarmTime = "12:00 PM";
-  String bedTime = "12:00 AM";
-  String sleepDuration = "12 hr 00 min";
+  String alarmTime = "8:10 AM";
+  String bedTime = "10:30 AM";
+  String sleepDuration = "??";
   @override
   Widget build(BuildContext context) {
     double smallerMarginRatio = 0.025;
@@ -49,6 +49,8 @@ class _SetAlarmState extends State<SetAlarm> {
               children: [
                 SizedBox(height: size.height * smallerMarginRatio),
                 TimeDurationPicker(
+                  start: const TimeOfDay(hour: 8, minute: 10),
+                  end: const TimeOfDay(hour: 10, minute: 30),
                   diameter: size.width * 0.775,
                   icon1Data: Icons.notifications_none,
                   icon2Data: Icons.bed,

example/pubspec.lock

@@ -5,56 +5,56 @@ packages:
     dependency: transitive
     description:
       name: async
-      sha256: bfe67ef28df125b7dddcea62755991f807aa39a2492a23e1550161692950bbe0
-      url: "https://pub.dev"
+      sha256: "947bfcf187f74dbc5e146c9eb9c0f10c9f8b30743e341481c1e2ed3ecc18c20c"
+      url: "https://pub.flutter-io.cn"
     source: hosted
-    version: "2.10.0"
+    version: "2.11.0"
   boolean_selector:
     dependency: transitive
     description:
       name: boolean_selector
       sha256: "6cfb5af12253eaf2b368f07bacc5a80d1301a071c73360d746b7f2e32d762c66"
-      url: "https://pub.dev"
+      url: "https://pub.flutter-io.cn"
     source: hosted
     version: "2.1.1"
   characters:
     dependency: transitive
     description:
       name: characters
       sha256: "04a925763edad70e8443c99234dc3328f442e811f1d8fd1a72f1c8ad0f69a605"
-      url: "https://pub.dev"
+      url: "https://pub.flutter-io.cn"
     source: hosted
     version: "1.3.0"
   clock:
     dependency: transitive
     description:
       name: clock
       sha256: cb6d7f03e1de671e34607e909a7213e31d7752be4fb66a86d29fe1eb14bfb5cf
-      url: "https://pub.dev"
+      url: "https://pub.flutter-io.cn"
     source: hosted
     version: "1.1.1"
   collection:
     dependency: transitive
     description:
       name: collection
-      sha256: "4a07be6cb69c84d677a6c3096fcf960cc3285a8330b4603e0d463d15d9bd934c"
-      url: "https://pub.dev"
+      sha256: ee67cb0715911d28db6bf4af1026078bd6f0128b07a5f66fb2ed94ec6783c09a
+      url: "https://pub.flutter-io.cn"
     source: hosted
-    version: "1.17.1"
+    version: "1.18.0"
   cupertino_icons:
     dependency: "direct main"
     description:
       name: cupertino_icons
-      sha256: "1989d917fbe8e6b39806207df5a3fdd3d816cbd090fac2ce26fb45e9a71476e5"
-      url: "https://pub.dev"
+      sha256: d57953e10f9f8327ce64a508a355f0b1ec902193f66288e8cb5070e7c47eeb2d
+      url: "https://pub.flutter-io.cn"
     source: hosted
-    version: "1.0.4"
+    version: "1.0.6"
   fake_async:
     dependency: transitive
     description:
       name: fake_async
       sha256: "511392330127add0b769b75a987850d136345d9227c6b94c96a04cf4a391bf78"
-      url: "https://pub.dev"
+      url: "https://pub.flutter-io.cn"
     source: hosted
     version: "1.3.1"
   flutter:
@@ -67,62 +67,78 @@ packages:
     description:
       name: flutter_lints
       sha256: b543301ad291598523947dc534aaddc5aaad597b709d2426d3a0e0d44c5cb493
-      url: "https://pub.dev"
+      url: "https://pub.flutter-io.cn"
     source: hosted
     version: "1.0.4"
   flutter_test:
     dependency: "direct dev"
     description: flutter
     source: sdk
     version: "0.0.0"
-  js:
+  leak_tracker:
+    dependency: transitive
+    description:
+      name: leak_tracker
+      sha256: "78eb209deea09858f5269f5a5b02be4049535f568c07b275096836f01ea323fa"
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "10.0.0"
+  leak_tracker_flutter_testing:
     dependency: transitive
     description:
-      name: js
-      sha256: f2c445dce49627136094980615a031419f7f3eb393237e4ecd97ac15dea343f3
-      url: "https://pub.dev"
+      name: leak_tracker_flutter_testing
+      sha256: b46c5e37c19120a8a01918cfaf293547f47269f7cb4b0058f21531c2465d6ef0
+      url: "https://pub.flutter-io.cn"
     source: hosted
-    version: "0.6.7"
+    version: "2.0.1"
+  leak_tracker_testing:
+    dependency: transitive
+    description:
+      name: leak_tracker_testing
+      sha256: a597f72a664dbd293f3bfc51f9ba69816f84dcd403cdac7066cb3f6003f3ab47
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "2.0.1"
   lints:
     dependency: transitive
     description:
       name: lints
       sha256: a2c3d198cb5ea2e179926622d433331d8b58374ab8f29cdda6e863bd62fd369c
-      url: "https://pub.dev"
+      url: "https://pub.flutter-io.cn"
     source: hosted
     version: "1.0.1"
   matcher:
     dependency: transitive
     description:
       name: matcher
-      sha256: c94db23593b89766cda57aab9ac311e3616cf87c6fa4e9749df032f66f30dcb8
-      url: "https://pub.dev"
+      sha256: d2323aa2060500f906aa31a895b4030b6da3ebdcc5619d14ce1aada65cd161cb
+      url: "https://pub.flutter-io.cn"
     source: hosted
-    version: "0.12.14"
+    version: "0.12.16+1"
   material_color_utilities:
     dependency: transitive
     description:
       name: material_color_utilities
-      sha256: d92141dc6fe1dad30722f9aa826c7fbc896d021d792f80678280601aff8cf724
-      url: "https://pub.dev"
+      sha256: "0e0a020085b65b6083975e499759762399b4475f766c21668c4ecca34ea74e5a"
+      url: "https://pub.flutter-io.cn"
     source: hosted
-    version: "0.2.0"
+    version: "0.8.0"
   meta:
     dependency: transitive
     description:
       name: meta
-      sha256: "12307e7f0605ce3da64cf0db90e5fcab0869f3ca03f76be6bb2991ce0a55e82b"
-      url: "https://pub.dev"
+      sha256: d584fa6707a52763a52446f02cc621b077888fb63b93bbcb1143a7be5a0c0c04
+      url: "https://pub.flutter-io.cn"
     source: hosted
-    version: "1.9.0"
+    version: "1.11.0"
   path:
     dependency: transitive
     description:
       name: path
-      sha256: "8829d8a55c13fc0e37127c29fedf290c102f4e40ae94ada574091fe0ff96c917"
-      url: "https://pub.dev"
+      sha256: "087ce49c3f0dc39180befefc60fdb4acd8f8620e5682fe2476afd0b3688bb4af"
+      url: "https://pub.flutter-io.cn"
     source: hosted
-    version: "1.8.3"
+    version: "1.9.0"
   sky_engine:
     dependency: transitive
     description: flutter
@@ -132,50 +148,50 @@ packages:
     dependency: transitive
     description:
       name: source_span
-      sha256: dd904f795d4b4f3b870833847c461801f6750a9fa8e61ea5ac53f9422b31f250
-      url: "https://pub.dev"
+      sha256: "53e943d4206a5e30df338fd4c6e7a077e02254531b138a15aec3bd143c1a8b3c"
+      url: "https://pub.flutter-io.cn"
     source: hosted
-    version: "1.9.1"
+    version: "1.10.0"
   stack_trace:
     dependency: transitive
     description:
       name: stack_trace
-      sha256: c3c7d8edb15bee7f0f74debd4b9c5f3c2ea86766fe4178eb2a18eb30a0bdaed5
-      url: "https://pub.dev"
+      sha256: "73713990125a6d93122541237550ee3352a2d84baad52d375a4cad2eb9b7ce0b"
+      url: "https://pub.flutter-io.cn"
     source: hosted
-    version: "1.11.0"
+    version: "1.11.1"
   stream_channel:
     dependency: transitive
     description:
       name: stream_channel
-      sha256: "83615bee9045c1d322bbbd1ba209b7a749c2cbcdcb3fdd1df8eb488b3279c1c8"
-      url: "https://pub.dev"
+      sha256: ba2aa5d8cc609d96bbb2899c28934f9e1af5cddbd60a827822ea467161eb54e7
+      url: "https://pub.flutter-io.cn"
     source: hosted
-    version: "2.1.1"
+    version: "2.1.2"
   string_scanner:
     dependency: transitive
     description:
       name: string_scanner
       sha256: "556692adab6cfa87322a115640c11f13cb77b3f076ddcc5d6ae3c20242bedcde"
-      url: "https://pub.dev"
+      url: "https://pub.flutter-io.cn"
     source: hosted
     version: "1.2.0"
   term_glyph:
     dependency: transitive
     description:
       name: term_glyph
       sha256: a29248a84fbb7c79282b40b8c72a1209db169a2e0542bce341da992fe1bc7e84
-      url: "https://pub.dev"
+      url: "https://pub.flutter-io.cn"
     source: hosted
     version: "1.2.1"
   test_api:
     dependency: transitive
     description:
       name: test_api
-      sha256: "6182294da5abf431177fccc1ee02401f6df30f766bc6130a0852c6b6d7ee6b2d"
-      url: "https://pub.dev"
+      sha256: "5c2f730018264d276c20e4f1503fd1308dfbbae39ec8ee63c5236311ac06954b"
+      url: "https://pub.flutter-io.cn"
     source: hosted
-    version: "0.4.18"
+    version: "0.6.1"
   time_duration_picker:
     dependency: "direct dev"
     description:
@@ -188,9 +204,17 @@ packages:
     description:
       name: vector_math
       sha256: "80b3257d1492ce4d091729e3a67a60407d227c27241d6927be0130c98e741803"
-      url: "https://pub.dev"
+      url: "https://pub.flutter-io.cn"
     source: hosted
     version: "2.1.4"
+  vm_service:
+    dependency: transitive
+    description:
+      name: vm_service
+      sha256: b3d56ff4341b8f182b96aceb2fa20e3dcb336b9f867bc0eafc0de10f1048e957
+      url: "https://pub.flutter-io.cn"
+    source: hosted
+    version: "13.0.0"
 sdks:
-  dart: ">=2.19.0 <4.0.0"
+  dart: ">=3.2.0-0 <4.0.0"
   flutter: ">=1.17.0"

lib/knob.dart

@@ -5,6 +5,9 @@ import 'package:flutter/material.dart';
 
 import 'knob_clipper.dart';
 
+// ignore: constant_identifier_names
+const MINUTES = 60 * 24;
+
 class Knob extends StatefulWidget {
   final double radius;
   final double innerRadiusRatio;
@@ -16,6 +19,9 @@ class Knob extends StatefulWidget {
   final Color iconColor;
   final void Function(String)? setDurationCallback;
   final BoxDecoration? knobDecoration;
+  final TimeOfDay? start;
+  final TimeOfDay? end;
+
   const Knob(
       {Key? key,
       required this.radius,
@@ -27,7 +33,9 @@ class Knob extends StatefulWidget {
       required this.icon2Data,
       required this.iconColor,
       this.setDurationCallback,
-      this.knobDecoration})
+      this.knobDecoration,
+      this.end,
+      this.start})
       : super(key: key);
 
   @override
@@ -76,8 +84,19 @@ class _KnobState extends State<Knob> {
         centerOffset);
     WidgetsBinding.instance
         .addPostFrameCallback((_) => _initializeOffsetsAndAngles(context));
-    icon1Angle = 0;
-    icon2Angle = pi;
+    if (widget.start == null) {
+      icon1Angle = 0;
+    } else {
+      icon1Angle =
+          (widget.start!.hour * 60 + widget.start!.minute) / MINUTES * 2 * pi;
+    }
+
+    if (widget.end == null) {
+      icon2Angle = pi;
+    } else {
+      icon2Angle =
+          (widget.end!.hour * 60 + widget.end!.minute) / MINUTES * 2 * pi;
+    }
   }
 
   @override

lib/time_duration_picker.dart

@@ -17,6 +17,8 @@ class TimeDurationPicker extends StatelessWidget {
   final BoxDecoration? knobBackgroundDecoration;
   final BoxDecoration? clockDecoration;
   final TextStyle? clockTextStyle;
+  final TimeOfDay? start;
+  final TimeOfDay? end;
 
   const TimeDurationPicker(
       {Key? key,
@@ -30,7 +32,9 @@ class TimeDurationPicker extends StatelessWidget {
       this.knobBackgroundDecoration,
       this.clockDecoration,
       this.clockTextStyle,
-      this.setDurationCallback})
+      this.setDurationCallback,
+      this.end,
+      this.start})
       : super(key: key);
 
   @override
@@ -64,6 +68,8 @@ class TimeDurationPicker extends StatelessWidget {
                   iconColor: iconColor,
                   knobDecoration: knobDecoration,
                   setDurationCallback: setDurationCallback,
+                  end: end,
+                  start: start,
                 ),
                 Padding(
                   padding: EdgeInsets.all(diameter * gapRatio),