Merge pull request #6 from crazy365966834/master

optimize date time picker, add max/min, add button color theme

.gitignore

@@ -1,10 +1,72 @@
+# Miscellaneous
+*.class
+*.lock
+*.log
+*.pyc
+*.swp
 .DS_Store
-.dart_tool/
+.atom/
+.buildlog/
+.history
+.svn/
+
+# IntelliJ related
+*.iml
+*.ipr
+*.iws
+.idea/
 
+# Visual Studio Code related
+.vscode/
+
+# Flutter/Dart/Pub related
+**/doc/api/
+.dart_tool/
+.flutter-plugins
 .packages
+.pub-cache/
 .pub/
-
 build/
-ios/.generated/
-ios/Flutter/Generated.xcconfig
-ios/Runner/GeneratedPluginRegistrant.*
+
+# Android related
+pubspec.lock
+**/android/**/gradle-wrapper.jar
+**/android/.gradle
+**/android/captures/
+**/android/gradlew
+**/android/gradlew.bat
+**/android/local.properties
+**/android/**/GeneratedPluginRegistrant.java
+
+# iOS/XCode related
+**/ios/**/*.mode1v3
+**/ios/**/*.mode2v3
+**/ios/**/*.moved-aside
+**/ios/**/*.pbxuser
+**/ios/**/*.perspectivev3
+**/ios/**/*sync/
+**/ios/**/.sconsign.dblite
+**/ios/**/.tags*
+**/ios/**/.vagrant/
+**/ios/**/DerivedData/
+**/ios/**/Icon?
+**/ios/**/Pods/
+**/ios/**/.symlinks/
+**/ios/**/profile
+**/ios/**/xcuserdata
+**/ios/.generated/
+**/ios/Flutter/App.framework
+**/ios/Flutter/Flutter.framework
+**/ios/Flutter/Generated.xcconfig
+**/ios/Flutter/app.flx
+**/ios/Flutter/app.zip
+**/ios/Flutter/flutter_assets/
+**/ios/ServiceDefinitions.json
+**/ios/Runner/GeneratedPluginRegistrant.*
+
+# Exceptions to above rules.
+!**/ios/**/default.mode1v3
+!**/ios/**/default.mode2v3
+!**/ios/**/default.pbxuser
+!**/ios/**/default.perspectivev3
+!/packages/flutter_tools/test/data/dart_dependencies_test/**/.packages

.idea/codeStyles/Project.xml

@@ -1,29 +0,0 @@
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example/pubspec.lock

@@ -1,391 +0,0 @@
-# Generated by pub
-# See https://www.dartlang.org/tools/pub/glossary#lockfile
-packages:
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-    dependency: transitive
-    description:
-      name: analyzer
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "0.32.4"
-  args:
-    dependency: transitive
-    description:
-      name: args
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.5.0"
-  async:
-    dependency: transitive
-    description:
-      name: async
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "2.0.8"
-  boolean_selector:
-    dependency: transitive
-    description:
-      name: boolean_selector
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.0.4"
-  charcode:
-    dependency: transitive
-    description:
-      name: charcode
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.1.2"
-  collection:
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-    description:
-      name: collection
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.14.11"
-  convert:
-    dependency: transitive
-    description:
-      name: convert
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "2.0.2"
-  crypto:
-    dependency: transitive
-    description:
-      name: crypto
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "2.0.6"
-  csslib:
-    dependency: transitive
-    description:
-      name: csslib
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "0.14.5"
-  cupertino_icons:
-    dependency: "direct main"
-    description:
-      name: cupertino_icons
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "0.1.2"
-  flutter:
-    dependency: "direct main"
-    description: flutter
-    source: sdk
-    version: "0.0.0"
-  flutter_datetime_picker:
-    dependency: "direct main"
-    description:
-      path: ".."
-      relative: true
-    source: path
-    version: "1.0.3"
-  flutter_test:
-    dependency: "direct dev"
-    description: flutter
-    source: sdk
-    version: "0.0.0"
-  front_end:
-    dependency: transitive
-    description:
-      name: front_end
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "0.1.4"
-  glob:
-    dependency: transitive
-    description:
-      name: glob
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.1.7"
-  html:
-    dependency: transitive
-    description:
-      name: html
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "0.13.3+3"
-  http:
-    dependency: transitive
-    description:
-      name: http
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "0.11.3+17"
-  http_multi_server:
-    dependency: transitive
-    description:
-      name: http_multi_server
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "2.0.5"
-  http_parser:
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-    description:
-      name: http_parser
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "3.1.3"
-  io:
-    dependency: transitive
-    description:
-      name: io
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "0.3.3"
-  js:
-    dependency: transitive
-    description:
-      name: js
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "0.6.1+1"
-  json_rpc_2:
-    dependency: transitive
-    description:
-      name: json_rpc_2
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "2.0.9"
-  kernel:
-    dependency: transitive
-    description:
-      name: kernel
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "0.3.4"
-  logging:
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-    description:
-      name: logging
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "0.11.3+2"
-  matcher:
-    dependency: transitive
-    description:
-      name: matcher
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "0.12.3+1"
-  meta:
-    dependency: transitive
-    description:
-      name: meta
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.1.6"
-  mime:
-    dependency: transitive
-    description:
-      name: mime
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "0.9.6+2"
-  multi_server_socket:
-    dependency: transitive
-    description:
-      name: multi_server_socket
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.0.2"
-  node_preamble:
-    dependency: transitive
-    description:
-      name: node_preamble
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.4.4"
-  package_config:
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-    description:
-      name: package_config
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.0.5"
-  package_resolver:
-    dependency: transitive
-    description:
-      name: package_resolver
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.0.4"
-  path:
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-    description:
-      name: path
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.6.2"
-  plugin:
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-    description:
-      name: plugin
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "0.2.0+3"
-  pool:
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-    description:
-      name: pool
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.3.6"
-  pub_semver:
-    dependency: transitive
-    description:
-      name: pub_semver
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.4.2"
-  quiver:
-    dependency: transitive
-    description:
-      name: quiver
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "2.0.0+1"
-  shelf:
-    dependency: transitive
-    description:
-      name: shelf
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "0.7.3+3"
-  shelf_packages_handler:
-    dependency: transitive
-    description:
-      name: shelf_packages_handler
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.0.4"
-  shelf_static:
-    dependency: transitive
-    description:
-      name: shelf_static
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "0.2.8"
-  shelf_web_socket:
-    dependency: transitive
-    description:
-      name: shelf_web_socket
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "0.2.2+4"
-  sky_engine:
-    dependency: transitive
-    description: flutter
-    source: sdk
-    version: "0.0.99"
-  source_map_stack_trace:
-    dependency: transitive
-    description:
-      name: source_map_stack_trace
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.1.5"
-  source_maps:
-    dependency: transitive
-    description:
-      name: source_maps
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "0.10.7"
-  source_span:
-    dependency: transitive
-    description:
-      name: source_span
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.4.1"
-  stack_trace:
-    dependency: transitive
-    description:
-      name: stack_trace
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.9.3"
-  stream_channel:
-    dependency: transitive
-    description:
-      name: stream_channel
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.6.8"
-  string_scanner:
-    dependency: transitive
-    description:
-      name: string_scanner
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.0.4"
-  term_glyph:
-    dependency: transitive
-    description:
-      name: term_glyph
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.0.1"
-  test:
-    dependency: transitive
-    description:
-      name: test
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.3.0"
-  typed_data:
-    dependency: transitive
-    description:
-      name: typed_data
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.1.6"
-  utf:
-    dependency: transitive
-    description:
-      name: utf
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "0.9.0+5"
-  vector_math:
-    dependency: transitive
-    description:
-      name: vector_math
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "2.0.8"
-  vm_service_client:
-    dependency: transitive
-    description:
-      name: vm_service_client
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "0.2.6"
-  watcher:
-    dependency: transitive
-    description:
-      name: watcher
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "0.9.7+10"
-  web_socket_channel:
-    dependency: transitive
-    description:
-      name: web_socket_channel
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.0.9"
-  yaml:
-    dependency: transitive
-    description:
-      name: yaml
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "2.1.15"
-sdks:
-  dart: ">=2.0.0-dev.68.0 <3.0.0"

flutter_datetime_picker.iml

@@ -1,23 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<module type="JAVA_MODULE" version="4">
-  <component name="NewModuleRootManager" inherit-compiler-output="true">
-    <exclude-output />
-    <content url="file://$MODULE_DIR$">
-      <sourceFolder url="file://$MODULE_DIR$/lib" isTestSource="false" />
-      <sourceFolder url="file://$MODULE_DIR$/test" isTestSource="true" />
-      <excludeFolder url="file://$MODULE_DIR$/.dart_tool" />
-      <excludeFolder url="file://$MODULE_DIR$/.idea" />
-      <excludeFolder url="file://$MODULE_DIR$/.pub" />
-      <excludeFolder url="file://$MODULE_DIR$/build" />
-      <excludeFolder url="file://$MODULE_DIR$/example/.dart_tool" />
-      <excludeFolder url="file://$MODULE_DIR$/example/.pub" />
-      <excludeFolder url="file://$MODULE_DIR$/example/build" />
-      <excludeFolder url="file://$MODULE_DIR$/example/ios/Flutter/flutter_assets/packages" />
-    </content>
-    <orderEntry type="jdk" jdkName="Android API 25 Platform" jdkType="Android SDK" />
-    <orderEntry type="sourceFolder" forTests="false" />
-    <orderEntry type="library" name="Dart Packages" level="project" />
-    <orderEntry type="library" name="Dart SDK" level="project" />
-    <orderEntry type="library" name="Flutter Plugins" level="project" />
-  </component>
-</module>

lib/flutter_datetime_picker.dart

@@ -2,29 +2,32 @@ library flutter_datetime_picker;
 
 import 'package:flutter/cupertino.dart';
 import 'package:flutter/material.dart';
+import 'package:flutter_datetime_picker/src/datetime_picker_theme.dart';
 import 'package:flutter_datetime_picker/src/date_model.dart';
 import 'package:flutter_datetime_picker/src/i18n_model.dart';
+
+export 'package:flutter_datetime_picker/src/datetime_picker_theme.dart';
 export 'package:flutter_datetime_picker/src/date_model.dart';
 export 'package:flutter_datetime_picker/src/i18n_model.dart';
 
 typedef DateChangedCallback(DateTime time);
 typedef String StringAtIndexCallBack(int index);
 
-const double _kDatePickerHeight = 210.0;
-const double _kDatePickerTitleHeight = 44.0;
-const double _kDatePickerItemHeight = 36.0;
-const double _kDatePickerFontSize = 18.0;
-
 class DatePicker {
   ///
   /// Display date picker bottom sheet.
   ///
-  static void showDatePicker(BuildContext context,
-      {bool showTitleActions: true,
-      DateChangedCallback onChanged,
-      DateChangedCallback onConfirm,
-      locale: LocaleType.en,
-      DateTime currentTime}) {
+  static void showDatePicker(
+    BuildContext context, {
+    bool showTitleActions: true,
+    DateTime min,
+    DateTime max,
+    DateChangedCallback onChanged,
+    DateChangedCallback onConfirm,
+    locale: LocaleType.en,
+    DateTime currentTime,
+    DatePickerTheme theme,
+  }) {
     Navigator.push(
         context,
         new _DatePickerRoute(
@@ -32,20 +35,25 @@ class DatePicker {
             onChanged: onChanged,
             onConfirm: onConfirm,
             locale: locale,
-            theme: Theme.of(context, shadowThemeOnly: true),
+            theme: theme,
             barrierLabel: MaterialLocalizations.of(context).modalBarrierDismissLabel,
-            pickerModel: DatePickerModel(currentTime: currentTime, locale: locale)));
+            pickerModel: DatePickerModel(currentTime: currentTime, max: max, min: min, locale: locale)));
   }
 
   ///
   /// Display time picker bottom sheet.
   ///
-  static void showTimePicker(BuildContext context,
-      {bool showTitleActions: true,
-      DateChangedCallback onChanged,
-      DateChangedCallback onConfirm,
-      locale: LocaleType.en,
-      DateTime currentTime}) {
+  static void showTimePicker(
+    BuildContext context, {
+    bool showTitleActions: true,
+    DateTime min,
+    DateTime max,
+    DateChangedCallback onChanged,
+    DateChangedCallback onConfirm,
+    locale: LocaleType.en,
+    DateTime currentTime,
+    DatePickerTheme theme,
+  }) {
     Navigator.push(
         context,
         new _DatePickerRoute(
@@ -53,20 +61,25 @@ class DatePicker {
             onChanged: onChanged,
             onConfirm: onConfirm,
             locale: locale,
-            theme: Theme.of(context, shadowThemeOnly: true),
+            theme: theme,
             barrierLabel: MaterialLocalizations.of(context).modalBarrierDismissLabel,
-            pickerModel: TimePickerModel(currentTime: currentTime, locale: locale)));
+            pickerModel: TimePickerModel(currentTime: currentTime, max: max, min: min, locale: locale)));
   }
 
   ///
   /// Display date&time picker bottom sheet.
   ///
-  static void showDateTimePicker(BuildContext context,
-      {bool showTitleActions: true,
-      DateChangedCallback onChanged,
-      DateChangedCallback onConfirm,
-      locale: LocaleType.en,
-      DateTime currentTime}) {
+  static void showDateTimePicker(
+    BuildContext context, {
+    bool showTitleActions: true,
+    DateTime min,
+    DateTime max,
+    DateChangedCallback onChanged,
+    DateChangedCallback onConfirm,
+    locale: LocaleType.en,
+    DateTime currentTime,
+    DatePickerTheme theme,
+  }) {
     Navigator.push(
         context,
         new _DatePickerRoute(
@@ -74,7 +87,7 @@ class DatePicker {
             onChanged: onChanged,
             onConfirm: onConfirm,
             locale: locale,
-            theme: Theme.of(context, shadowThemeOnly: true),
+            theme: theme,
             barrierLabel: MaterialLocalizations.of(context).modalBarrierDismissLabel,
             pickerModel: DateTimePickerModel(currentTime: currentTime, locale: locale)));
   }
@@ -82,12 +95,15 @@ class DatePicker {
   ///
   /// Display date picker bottom sheet witch custom picker model.
   ///
-  static void showPicker(BuildContext context,
-      {bool showTitleActions: true,
-      DateChangedCallback onChanged,
-      DateChangedCallback onConfirm,
-      locale: LocaleType.en,
-      BasePickerModel pickerModel}) {
+  static void showPicker(
+    BuildContext context, {
+    bool showTitleActions: true,
+    DateChangedCallback onChanged,
+    DateChangedCallback onConfirm,
+    locale: LocaleType.en,
+    BasePickerModel pickerModel,
+    DatePickerTheme theme,
+  }) {
     Navigator.push(
         context,
         new _DatePickerRoute(
@@ -95,7 +111,7 @@ class DatePicker {
             onChanged: onChanged,
             onConfirm: onConfirm,
             locale: locale,
-            theme: Theme.of(context, shadowThemeOnly: true),
+            theme: theme,
             barrierLabel: MaterialLocalizations.of(context).modalBarrierDismissLabel,
             pickerModel: pickerModel));
   }
@@ -117,7 +133,7 @@ class _DatePickerRoute<T> extends PopupRoute<T> {
   final bool showTitleActions;
   final DateChangedCallback onChanged;
   final DateChangedCallback onConfirm;
-  final ThemeData theme;
+  final DatePickerTheme theme;
   final LocaleType locale;
   final BasePickerModel pickerModel;
 
@@ -131,7 +147,7 @@ class _DatePickerRoute<T> extends PopupRoute<T> {
   final String barrierLabel;
 
   @override
-  Color get barrierColor => Colors.black54;
+  Color get barrierColor => theme?.barrierColor ?? Colors.black54;
 
   AnimationController _animationController;
 
@@ -143,8 +159,7 @@ class _DatePickerRoute<T> extends PopupRoute<T> {
   }
 
   @override
-  Widget buildPage(
-      BuildContext context, Animation<double> animation, Animation<double> secondaryAnimation) {
+  Widget buildPage(BuildContext context, Animation<double> animation, Animation<double> secondaryAnimation) {
     Widget bottomSheet = new MediaQuery.removePadding(
       context: context,
       removeTop: true,
@@ -156,15 +171,14 @@ class _DatePickerRoute<T> extends PopupRoute<T> {
       ),
     );
     if (theme != null) {
-      bottomSheet = new Theme(data: theme, child: bottomSheet);
+      bottomSheet = new Theme(data: Theme.of(context, shadowThemeOnly: true), child: bottomSheet);
     }
     return bottomSheet;
   }
 }
 
 class _DatePickerComponent extends StatefulWidget {
-  _DatePickerComponent(
-      {Key key, @required this.route, this.onChanged, this.locale, this.pickerModel});
+  _DatePickerComponent({Key key, @required this.route, this.onChanged, this.locale, this.pickerModel});
 
   final DateChangedCallback onChanged;
 
@@ -190,28 +204,28 @@ class _DatePickerState extends State<_DatePickerComponent> {
   }
 
   void refreshScrollOffset() {
-    leftScrollCtrl =
-        new FixedExtentScrollController(initialItem: widget.pickerModel.currentLeftIndex());
-    middleScrollCtrl =
-        new FixedExtentScrollController(initialItem: widget.pickerModel.currentMiddleIndex());
-    rightScrollCtrl =
-        new FixedExtentScrollController(initialItem: widget.pickerModel.currentRightIndex());
+    leftScrollCtrl = new FixedExtentScrollController(initialItem: widget.pickerModel.currentLeftIndex());
+    middleScrollCtrl = new FixedExtentScrollController(initialItem: widget.pickerModel.currentMiddleIndex());
+    rightScrollCtrl = new FixedExtentScrollController(initialItem: widget.pickerModel.currentRightIndex());
   }
 
   @override
   Widget build(BuildContext context) {
+    DatePickerTheme theme = DefaultDatePickerTheme.of(context).theme;
+    if (widget.route.theme != null) {
+      theme = widget.route.theme.merge(theme);
+    }
     return new GestureDetector(
       child: new AnimatedBuilder(
         animation: widget.route.animation,
         builder: (BuildContext context, Widget child) {
           return new ClipRect(
             child: new CustomSingleChildLayout(
-              delegate: new _BottomPickerLayout(widget.route.animation.value,
-                  showTitleActions: widget.route.showTitleActions),
+              delegate: new _BottomPickerLayout(widget.route.animation.value, theme, showTitleActions: widget.route.showTitleActions),
               child: new GestureDetector(
                 child: Material(
                   color: Colors.transparent,
-                  child: _renderPickerView(),
+                  child: _renderPickerView(theme),
                 ),
               ),
             ),
@@ -227,12 +241,12 @@ class _DatePickerState extends State<_DatePickerComponent> {
     }
   }
 
-  Widget _renderPickerView() {
-    Widget itemView = _renderItemView();
+  Widget _renderPickerView(DatePickerTheme theme) {
+    Widget itemView = _renderItemView(theme);
     if (widget.route.showTitleActions) {
       return Column(
         children: <Widget>[
-          _renderTitleActionsView(),
+          _renderTitleActionsView(theme),
           itemView,
         ],
       );
@@ -240,18 +254,14 @@ class _DatePickerState extends State<_DatePickerComponent> {
     return itemView;
   }
 
-  Widget _renderColumnView(
-      StringAtIndexCallBack stringAtIndexCB,
-      ScrollController scrollController,
-      int layoutProportion,
-      ValueChanged<int> selectedChangedWhenScrolling,
-      ValueChanged<int> selectedChangedWhenScrollEnd) {
+  Widget _renderColumnView(ValueKey key, DatePickerTheme theme, StringAtIndexCallBack stringAtIndexCB, ScrollController scrollController, int layoutProportion,
+      ValueChanged<int> selectedChangedWhenScrolling, ValueChanged<int> selectedChangedWhenScrollEnd) {
     return Expanded(
       flex: layoutProportion,
       child: Container(
           padding: EdgeInsets.all(8.0),
-          height: _kDatePickerHeight,
-          decoration: BoxDecoration(color: Colors.white),
+          height: theme.containerHeight,
+          decoration: BoxDecoration(color: theme?.backgroundColor ?? Colors.white),
           child: NotificationListener(
               onNotification: (ScrollNotification notification) {
                 if (notification.depth == 0 &&
@@ -265,10 +275,10 @@ class _DatePickerState extends State<_DatePickerComponent> {
                 return false;
               },
               child: CupertinoPicker.builder(
-                  key: ValueKey(widget.pickerModel.currentMiddleIndex()),
-                  backgroundColor: Colors.white,
+                  key: key,
+                  backgroundColor: theme?.backgroundColor ?? Colors.white,
                   scrollController: scrollController,
-                  itemExtent: _kDatePickerItemHeight,
+                  itemExtent: theme.itemHeight,
                   onSelectedItemChanged: (int index) {
                     selectedChangedWhenScrolling(index);
                   },
@@ -279,11 +289,11 @@ class _DatePickerState extends State<_DatePickerComponent> {
                       return null;
                     }
                     return Container(
-                      height: _kDatePickerItemHeight,
+                      height: theme.itemHeight,
                       alignment: Alignment.center,
                       child: Text(
                         content,
-                        style: TextStyle(color: Color(0xFF000046), fontSize: _kDatePickerFontSize),
+                        style: theme?.itemStyle,
                         textAlign: TextAlign.start,
                       ),
                     );
@@ -291,41 +301,41 @@ class _DatePickerState extends State<_DatePickerComponent> {
     );
   }
 
-  Widget _renderItemView() {
+  Widget _renderItemView(DatePickerTheme theme) {
     return Container(
-      color: Colors.white,
+      color: theme?.backgroundColor ?? Colors.white,
       child: Row(
         mainAxisAlignment: MainAxisAlignment.spaceBetween,
         children: <Widget>[
-          _renderColumnView(widget.pickerModel.leftStringAtIndex, leftScrollCtrl,
+          _renderColumnView(ValueKey(widget.pickerModel.currentLeftIndex()), theme, widget.pickerModel.leftStringAtIndex, leftScrollCtrl,
               widget.pickerModel.layoutProportions()[0], (index) {
+            widget.pickerModel.setLeftIndex(index);
+          }, (index) {
             setState(() {
-              widget.pickerModel.setLeftIndex(index);
+              refreshScrollOffset();
+              _notifyDateChanged();
             });
-            _notifyDateChanged();
-          }, null),
+          }),
           Text(
             widget.pickerModel.leftDivider(),
-            style: TextStyle(color: Color(0xFF000046), fontSize: _kDatePickerFontSize),
+            style: theme?.itemStyle,
           ),
-          _renderColumnView(widget.pickerModel.middleStringAtIndex, middleScrollCtrl,
+          _renderColumnView(ValueKey(widget.pickerModel.currentLeftIndex()), theme, widget.pickerModel.middleStringAtIndex, middleScrollCtrl,
               widget.pickerModel.layoutProportions()[1], (index) {
             widget.pickerModel.setMiddleIndex(index);
           }, (index) {
             setState(() {
               refreshScrollOffset();
+              _notifyDateChanged();
             });
-            _notifyDateChanged();
           }),
           Text(
             widget.pickerModel.rightDivider(),
-            style: TextStyle(color: Color(0xFF000046), fontSize: _kDatePickerFontSize),
+            style: theme?.itemStyle,
           ),
-          _renderColumnView(widget.pickerModel.rightStringAtIndex, rightScrollCtrl,
+          _renderColumnView(ValueKey(widget.pickerModel.currentMiddleIndex()), theme, widget.pickerModel.rightStringAtIndex, rightScrollCtrl,
               widget.pickerModel.layoutProportions()[2], (index) {
-            setState(() {
-              widget.pickerModel.setRightIndex(index);
-            });
+            widget.pickerModel.setRightIndex(index);
             _notifyDateChanged();
           }, null),
         ],
@@ -334,38 +344,32 @@ class _DatePickerState extends State<_DatePickerComponent> {
   }
 
   // Title View
-  Widget _renderTitleActionsView() {
+  Widget _renderTitleActionsView(DatePickerTheme theme) {
     String done = _localeDone();
     String cancel = _localeCancel();
 
     return Container(
-      height: _kDatePickerTitleHeight,
-      decoration: BoxDecoration(color: Colors.white),
+      height: theme.titleHeight,
+      decoration: BoxDecoration(color: theme?.backgroundColor ?? Colors.white),
       child: Row(
         mainAxisAlignment: MainAxisAlignment.spaceBetween,
         children: <Widget>[
           Container(
-            height: _kDatePickerTitleHeight,
+            height: theme.titleHeight,
             child: FlatButton(
               child: Text(
                 '$cancel',
-                style: TextStyle(
-                  color: Theme.of(context).unselectedWidgetColor,
-                  fontSize: 16.0,
-                ),
+                style: theme?.cancelStyle,
               ),
               onPressed: () => Navigator.pop(context),
             ),
           ),
           Container(
-            height: _kDatePickerTitleHeight,
+            height: theme.titleHeight,
             child: FlatButton(
               child: Text(
                 '$done',
-                style: TextStyle(
-                  color: Theme.of(context).primaryColor,
-                  fontSize: 16.0,
-                ),
+                style: theme?.doneStyle,
               ),
               onPressed: () {
                 if (widget.route.onConfirm != null) {
@@ -390,24 +394,21 @@ class _DatePickerState extends State<_DatePickerComponent> {
 }
 
 class _BottomPickerLayout extends SingleChildLayoutDelegate {
-  _BottomPickerLayout(this.progress, {this.itemCount, this.showTitleActions});
+  _BottomPickerLayout(this.progress, this.theme, {this.itemCount, this.showTitleActions});
 
   final double progress;
   final int itemCount;
   final bool showTitleActions;
+  final DatePickerTheme theme;
 
   @override
   BoxConstraints getConstraintsForChild(BoxConstraints constraints) {
-    double maxHeight = _kDatePickerHeight;
+    double maxHeight = theme.containerHeight;
     if (showTitleActions) {
-      maxHeight += _kDatePickerTitleHeight;
+      maxHeight += theme.titleHeight;
     }
 
-    return new BoxConstraints(
-        minWidth: constraints.maxWidth,
-        maxWidth: constraints.maxWidth,
-        minHeight: 0.0,
-        maxHeight: maxHeight);
+    return new BoxConstraints(minWidth: constraints.maxWidth, maxWidth: constraints.maxWidth, minHeight: 0.0, maxHeight: maxHeight);
   }
 
   @override

lib/src/date_format.dart

@@ -326,11 +326,7 @@ String formatDate(DateTime date, List<String> formats, LocaleType locale) {
 }
 
 String digits(int value, int length) {
-  String ret = '$value';
-  if (ret.length < length) {
-    ret = '0' * (length - ret.length) + ret;
-  }
-  return ret;
+  return '$value'.padLeft(length, "0");
 }
 
 int dayInYear(DateTime date) => date.difference(new DateTime(date.year, 1, 1)).inDays;

lib/src/date_model.dart

@@ -1,19 +1,32 @@
 import 'package:flutter_datetime_picker/src/date_format.dart';
 import 'package:flutter_datetime_picker/src/i18n_model.dart';
+import 'package:flutter_commons_lang/flutter_commons_lang.dart';
 
 abstract class BasePickerModel {
   String leftStringAtIndex(int index);
+
   String middleStringAtIndex(int index);
+
   String rightStringAtIndex(int index);
+
   void setLeftIndex(int index);
+
   void setMiddleIndex(int index);
+
   void setRightIndex(int index);
+
   int currentLeftIndex();
+
   int currentMiddleIndex();
+
   int currentRightIndex();
+
   DateTime finalTime();
+
   String leftDivider();
+
   String rightDivider();
+
   List<int> layoutProportions();
 }
 
@@ -27,6 +40,7 @@ class CommonPickerModel extends BasePickerModel {
   int _currentRightIndex;
 
   LocaleType locale;
+
   CommonPickerModel({this.currentTime, locale}) : this.locale = locale ?? LocaleType.en;
 
   @override
@@ -96,81 +110,96 @@ class CommonPickerModel extends BasePickerModel {
 }
 
 class DatePickerModel extends CommonPickerModel {
+  DateTime max;
+  DateTime min;
   int maxYear;
   int minYear;
+  int maxMonth;
+  int minMonth;
+  int maxDay;
+  int minDay;
 
-  List<int> _leapYearMonths = const <int>[1, 3, 5, 7, 8, 10, 12];
-  int _calcDateCount(int year, int month) {
-    if (_leapYearMonths.contains(month)) {
-      return 31;
-    } else if (month == 2) {
-      if ((year % 4 == 0 && year % 100 != 0) || year % 400 == 0) {
-        return 29;
-      }
-      return 28;
-    }
-    return 30;
-  }
-
-  DatePickerModel(
-      {this.maxYear = 2050, this.minYear = 1970, DateTime currentTime, LocaleType locale})
-      : super(locale: locale) {
+  DatePickerModel({DateTime currentTime, this.max, this.min, LocaleType locale}) : super(locale: locale) {
     if (currentTime != null) {
-      int year = currentTime.year;
-      if (this.maxYear < year) {
-        currentTime = DateTime(this.maxYear, 12, 31);
-      } else if (this.minYear > year) {
-        currentTime = DateTime(this.minYear, 1, 1);
+      if (max != null && currentTime.compareTo(max) > 0) {
+        currentTime = max;
+      } else if (min != null && currentTime.compareTo(min) < 0) {
+        currentTime = min;
       }
     }
     this.currentTime = currentTime ?? DateTime.now();
-    _currentLeftIndex = this.currentTime.year - minYear;
-    _currentMiddleIndex = this.currentTime.month - 1;
-    _currentRightIndex = this.currentTime.day - 1;
-
     fillLeftLists();
     fillMiddleLists();
     fillRightLists();
+    _currentLeftIndex = this.currentTime.year - minYear;
+    _currentMiddleIndex = this.currentTime.month - minMonth;
+    _currentRightIndex = this.currentTime.day - minDay;
   }
 
   void fillLeftLists() {
+    maxYear = max?.year ?? 2050;
+    minYear = min?.year ?? 1970;
     this.leftList = List.generate(maxYear - minYear + 1, (int index) {
       return '${minYear + index}${_localeYear()}';
     });
   }
 
   void fillMiddleLists() {
-    this.middleList = List.generate(12, (int index) {
-      return '${index + 1}${_localeMonth()}';
+    minMonth = DateUtils.truncatedEquals(currentTime, min, DateUtils.YEAR) ? min?.month : 1;
+    maxMonth = DateUtils.truncatedEquals(currentTime, max, DateUtils.YEAR) ? max.month : 12;
+    this.middleList = List.generate(maxMonth - minMonth + 1, (int index) {
+      return '${minMonth + index}${_localeMonth()}';
     });
   }
 
   void fillRightLists() {
-    this.rightList = List.generate(
-        _calcDateCount(_currentLeftIndex + minYear, _currentMiddleIndex + 1), (int index) {
-      return '${index + 1}${_localeDay()}';
+    int dayCount = DateUtils.daysOfTheMonth(currentTime);
+    maxDay = DateUtils.truncatedEquals(currentTime, max, DateUtils.MONTH) ? max.day : dayCount;
+    minDay = DateUtils.truncatedEquals(currentTime, min, DateUtils.MONTH) ? min.day : 1;
+    this.rightList = List.generate(maxDay - minDay + 1, (int index) {
+      return '${minDay + index}${_localeDay()}';
     });
   }
 
   @override
   void setLeftIndex(int index) {
-    // TODO: implement setLeftIndex
+    if (index - minYear > maxYear) index = maxYear - minYear;
     super.setLeftIndex(index);
+    int month = currentTime.month;
+    currentTime = DateUtils.set(currentTime, year: index + minYear);
+    fillMiddleLists();
+
+    if (month > maxMonth) {
+      setMiddleIndex(maxMonth - minMonth);
+    } else if (month < minMonth) {
+      setMiddleIndex(0);
+    } else {
+      setMiddleIndex(month - minMonth);
+    }
   }
 
   @override
   void setMiddleIndex(int index) {
-    _currentMiddleIndex = index;
+    if (index - minMonth > maxMonth) index = maxMonth - minMonth;
+    super.setMiddleIndex(index);
+    int day = currentTime.day;
+    currentTime = DateUtils.set(currentTime, month: index + minMonth, day: 1);
     fillRightLists();
-    final dayCount = _calcDateCount(_currentLeftIndex + minYear, _currentMiddleIndex + 1);
-    if (_currentRightIndex >= dayCount) {
-      _currentRightIndex = dayCount;
+
+    if (day > maxDay) {
+      setRightIndex(maxDay - minDay);
+    } else if (day < minDay) {
+      setRightIndex(0);
+    } else {
+      setRightIndex(day - minDay);
     }
   }
 
   @override
   void setRightIndex(int index) {
+    if (index - minDay > maxDay) index = maxDay - minDay;
     super.setRightIndex(index);
+    currentTime = DateUtils.set(currentTime, day: index + minDay);
   }
 
   @override
@@ -227,24 +256,113 @@ class DatePickerModel extends CommonPickerModel {
   @override
   DateTime finalTime() {
     final year = _currentLeftIndex + minYear;
-    final month = _currentMiddleIndex + 1;
+    final month = _currentMiddleIndex + minMonth;
     final day = _currentRightIndex + 1;
     return DateTime(year, month, day);
   }
 }
 
 class TimePickerModel extends CommonPickerModel {
-  TimePickerModel({DateTime currentTime, LocaleType locale}) : super(locale: locale) {
+  DateTime max;
+  DateTime min;
+  int maxHour;
+  int minHour;
+  int maxMinute;
+  int minMinute;
+  int maxSecond;
+  int minSecond;
+
+  TimePickerModel({DateTime currentTime, this.max, this.min, LocaleType locale}) : super(locale: locale) {
+    if (currentTime != null) {
+      if (max != null && currentTime.compareTo(max) > 0) {
+        currentTime = max;
+      } else if (min != null && currentTime.compareTo(min) < 0) {
+        currentTime = min;
+      }
+    }
     this.currentTime = currentTime ?? DateTime.now();
+
+    maxHour = max?.hour ?? 23;
+    minHour = min?.hour ?? 0;
+    maxMinute = DateUtils.truncatedEquals(currentTime, max, DateUtils.MINUTE) ? max.minute : 59;
+    minMinute = DateUtils.truncatedEquals(currentTime, min, DateUtils.MINUTE) ? min?.minute : 0;
+
     _currentLeftIndex = this.currentTime.hour;
     _currentMiddleIndex = this.currentTime.minute;
     _currentRightIndex = this.currentTime.second;
+
+    fillLeftLists();
+    fillMiddleLists();
+    fillRightLists();
+  }
+
+  void fillLeftLists() {
+    this.leftList = List.generate(maxHour - minHour + 1, (int index) {
+      return digits(minHour + index, 2);
+    });
+  }
+
+  void fillMiddleLists() {
+    maxMinute = DateUtils.truncatedEquals(currentTime, max, DateUtils.HOUR) ? max?.minute : 59;
+    minMinute = DateUtils.truncatedEquals(currentTime, min, DateUtils.HOUR) ? min?.minute : 0;
+    this.middleList = List.generate(maxMinute - minMinute + 1, (int index) {
+      return digits(minMinute + index, 2);
+    });
+  }
+
+  void fillRightLists() {
+    maxSecond = DateUtils.truncatedEquals(currentTime, max, DateUtils.MINUTE) ? max.second : 59;
+    minSecond = DateUtils.truncatedEquals(currentTime, min, DateUtils.MINUTE) ? min.second : 0;
+    this.rightList = List.generate(maxSecond - minSecond + 1, (int index) {
+      return digits(minSecond + index, 2);
+    });
+  }
+
+  @override
+  void setLeftIndex(int index) {
+    if (index - minHour > maxHour) index = maxHour - minHour;
+    super.setLeftIndex(index);
+    int minute = currentTime.minute;
+    currentTime = DateUtils.set(currentTime, hour: index + minHour);
+    fillMiddleLists();
+
+    if (minute > maxMinute) {
+      setMiddleIndex(maxMinute - minMinute);
+    } else if (minute < minMinute) {
+      setMiddleIndex(0);
+    } else {
+      setMiddleIndex(minute - minMinute);
+    }
+  }
+
+  @override
+  void setMiddleIndex(int index) {
+    if (index - minMinute > maxMinute) index = maxMinute - minMinute;
+    super.setMiddleIndex(index);
+    int second = currentTime.second;
+    currentTime = DateUtils.set(currentTime, minute: index + minMinute, second: 1);
+    fillRightLists();
+
+    if (second > maxSecond) {
+      setRightIndex(maxSecond - minSecond);
+    } else if (second < minSecond) {
+      setRightIndex(0);
+    } else {
+      setRightIndex(second - minSecond);
+    }
+  }
+
+  @override
+  void setRightIndex(int index) {
+    if (index - minSecond > maxSecond) index = maxSecond - minSecond;
+    super.setRightIndex(index);
+    currentTime = DateUtils.set(currentTime, second: index + minSecond);
   }
 
   @override
   String leftStringAtIndex(int index) {
-    if (index >= 0 && index < 24) {
-      return digits(index, 2);
+    if (index >= 0 && index < leftList.length) {
+      return leftList[index];
     } else {
       return null;
     }
@@ -252,8 +370,8 @@ class TimePickerModel extends CommonPickerModel {
 
   @override
   String middleStringAtIndex(int index) {
-    if (index >= 0 && index < 60) {
-      return digits(index, 2);
+    if (index >= 0 && index < middleList.length) {
+      return middleList[index];
     } else {
       return null;
     }
@@ -261,8 +379,8 @@ class TimePickerModel extends CommonPickerModel {
 
   @override
   String rightStringAtIndex(int index) {
-    if (index >= 0 && index < 60) {
-      return digits(index, 2);
+    if (index >= 0 && index < rightList.length) {
+      return rightList[index];
     } else {
       return null;
     }
@@ -280,8 +398,7 @@ class TimePickerModel extends CommonPickerModel {
 
   @override
   DateTime finalTime() {
-    return DateTime(currentTime.year, currentTime.month, currentTime.day, _currentLeftIndex,
-        _currentMiddleIndex, _currentRightIndex);
+    return DateTime(currentTime.year, currentTime.month, currentTime.day, _currentLeftIndex, _currentMiddleIndex, _currentRightIndex);
   }
 }
 
@@ -325,7 +442,7 @@ class DateTimePickerModel extends CommonPickerModel {
 
   @override
   List<int> layoutProportions() {
-    return [4, 1, 1];
+    return [3, 1, 1];
   }
 
   @override

lib/src/datetime_picker_theme.dart

@@ -0,0 +1,175 @@
+import 'package:flutter/foundation.dart';
+import 'package:flutter/material.dart';
+
+class DatePickerTheme extends Diagnosticable {
+  /// Whether null values are replaced with their value in an ancestor text
+  /// style (e.g., in a [TextSpan] tree).
+  ///
+  /// If this is false, properties that don't have explicit values will revert
+  /// to the defaults: white in color, a font size of 10 pixels, in a sans-serif
+  /// font face.
+  final bool inherit;
+
+  final TextStyle cancelStyle;
+  final TextStyle doneStyle;
+  final TextStyle itemStyle;
+  final Color backgroundColor;
+  final Color barrierColor;
+
+  final double containerHeight;
+  final double titleHeight;
+  final double itemHeight;
+
+  const DatePickerTheme({
+    this.inherit,
+    this.cancelStyle,
+    this.doneStyle,
+    this.itemStyle,
+    this.backgroundColor,
+    this.barrierColor,
+    this.containerHeight = 210.0,
+    this.titleHeight = 44.0,
+    this.itemHeight = 36.0,
+  });
+
+  /// Creates a copy of this theme data but with the given fields replaced with
+  /// the new values.
+  DatePickerTheme copyWith({
+    TextStyle cancelStyle,
+    TextStyle doneStyle,
+    TextStyle itemStyle,
+    Color backgroundColor,
+    Color barrierColor,
+    double pickerHeight,
+    double pickerTitleHeight,
+    double pickerItemHeight,
+  }) {
+    return DatePickerTheme(
+      inherit: inherit,
+      cancelStyle: cancelStyle != null ? cancelStyle.merge(this.cancelStyle) : this.cancelStyle,
+      doneStyle: doneStyle != null ? doneStyle.merge(this.doneStyle) : this.doneStyle,
+      itemStyle: itemStyle != null ? itemStyle.merge(this.itemStyle) : this.itemStyle,
+      backgroundColor: backgroundColor ?? this.backgroundColor,
+      barrierColor: barrierColor ?? this.barrierColor,
+      containerHeight: pickerHeight ?? this.containerHeight,
+      titleHeight: pickerTitleHeight ?? this.titleHeight,
+      itemHeight: pickerItemHeight ?? this.itemHeight,
+    );
+  }
+
+  /// Returns a new theme data that is a combination of this style and the given
+  /// [other] style.
+  ///
+  /// If the given [other] theme data has its [DatePickerTheme.inherit] set to true,
+  /// its null properties are replaced with the non-null properties of this text
+  /// style. The [other] style _inherits_ the properties of this style. Another
+  /// way to think of it is that the "missing" properties of the [other] style
+  /// are _filled_ by the properties of this style.
+  ///
+  /// If the given [other] theme data has its [DatePickerTheme.inherit] set to false,
+  /// returns the given [other] style unchanged. The [other] style does not
+  /// inherit properties of this style.
+  ///
+  /// If the given theme data is null, returns this theme data.
+  DatePickerTheme merge(DatePickerTheme other) {
+    if (other == null) return this;
+    if (!other.inherit) return other;
+
+    return copyWith(
+      cancelStyle: other.cancelStyle,
+      doneStyle: other.doneStyle,
+      itemStyle: other.itemStyle,
+      backgroundColor: other.backgroundColor,
+      barrierColor: other.barrierColor,
+      pickerHeight: other.containerHeight,
+      pickerTitleHeight: other.titleHeight,
+      pickerItemHeight: other.itemHeight,
+    );
+  }
+}
+
+/// The theme data to apply to descendant [DatePicker] widgets without explicit style.
+class DefaultDatePickerTheme extends InheritedWidget {
+  /// Creates a default theme data for the given subtree.
+  ///
+  /// Consider using [DefaultDatePickerTheme.merge] to inherit styling information
+  /// from the current default theme data for a given [BuildContext].
+  ///
+  const DefaultDatePickerTheme({
+    Key key,
+    @required this.theme,
+    @required Widget child,
+  })  : assert(theme != null),
+        assert(child != null),
+        super(key: key, child: child);
+
+  /// A const-constructible default theme data that provides fallback values.
+  ///
+  /// Returned from [of] when the given [BuildContext] doesn't have an enclosing default theme data.
+  ///
+  /// This constructor creates a [DefaultDatePickerTheme] that lacks a [child], which
+  /// means the constructed value cannot be incorporated into the tree.
+  const DefaultDatePickerTheme.fallback() : theme = const DatePickerTheme();
+
+  /// Creates a default theme data that overrides the theme datas in scope at
+  /// this point in the widget tree.
+  ///
+  /// The given [style] is merged with the [style] from the default theme data
+  /// for the [BuildContext] where the widget is inserted, and any of the other
+  /// arguments that are not null replace the corresponding properties on that
+  /// same default theme data.
+  ///
+  /// This constructor cannot be used to override the [maxLines] property of the
+  /// ancestor with the value null, since null here is used to mean "defer to
+  /// ancestor". To replace a non-null [maxLines] from an ancestor with the null
+  /// value (to remove the restriction on number of lines), manually obtain the
+  /// ambient [DefaultDatePickerTheme] using [DefaultDatePickerTheme.of], then create a new
+  /// [DefaultDatePickerTheme] using the [new DefaultDatePickerTheme] constructor directly.
+  /// See the source below for an example of how to do this (since that's
+  /// essentially what this constructor does).
+  static Widget merge({
+    Key key,
+    DatePickerTheme theme,
+    @required Widget child,
+  }) {
+    assert(child != null);
+    return Builder(
+      builder: (BuildContext context) {
+        final DefaultDatePickerTheme parent = DefaultDatePickerTheme.of(context);
+        return DefaultDatePickerTheme(
+          key: key,
+          theme: parent.theme.merge(theme),
+          child: child,
+        );
+      },
+    );
+  }
+
+  /// The theme data to apply.
+  final DatePickerTheme theme;
+
+  /// The closest instance of this class that encloses the given context.
+  ///
+  /// If no such instance exists, returns an instance created by
+  /// [DefaultDatePickerTheme.fallback], which contains fallback values.
+  ///
+  /// Typical usage is as follows:
+  ///
+  /// ```dart
+  /// DefaultDatePickerTheme style = DefaultDatePickerTheme.of(context);
+  /// ```
+  static DefaultDatePickerTheme of(BuildContext context) {
+    return context.inheritFromWidgetOfExactType(DefaultDatePickerTheme) ?? const DefaultDatePickerTheme.fallback();
+  }
+
+  @override
+  bool updateShouldNotify(DefaultDatePickerTheme oldWidget) {
+    return theme != oldWidget.theme;
+  }
+
+  @override
+  void debugFillProperties(DiagnosticPropertiesBuilder properties) {
+    super.debugFillProperties(properties);
+    theme?.debugFillProperties(properties);
+  }
+}

pubspec.lock

@@ -1,377 +0,0 @@
-# Generated by pub
-# See https://www.dartlang.org/tools/pub/glossary#lockfile
-packages:
-  analyzer:
-    dependency: transitive
-    description:
-      name: analyzer
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "0.32.4"
-  args:
-    dependency: transitive
-    description:
-      name: args
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.5.0"
-  async:
-    dependency: transitive
-    description:
-      name: async
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "2.0.8"
-  boolean_selector:
-    dependency: transitive
-    description:
-      name: boolean_selector
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.0.4"
-  charcode:
-    dependency: transitive
-    description:
-      name: charcode
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.1.2"
-  collection:
-    dependency: transitive
-    description:
-      name: collection
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.14.11"
-  convert:
-    dependency: transitive
-    description:
-      name: convert
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "2.0.2"
-  crypto:
-    dependency: transitive
-    description:
-      name: crypto
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "2.0.6"
-  csslib:
-    dependency: transitive
-    description:
-      name: csslib
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "0.14.5"
-  flutter:
-    dependency: "direct main"
-    description: flutter
-    source: sdk
-    version: "0.0.0"
-  flutter_test:
-    dependency: "direct dev"
-    description: flutter
-    source: sdk
-    version: "0.0.0"
-  front_end:
-    dependency: transitive
-    description:
-      name: front_end
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "0.1.4"
-  glob:
-    dependency: transitive
-    description:
-      name: glob
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.1.7"
-  html:
-    dependency: transitive
-    description:
-      name: html
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "0.13.3+3"
-  http:
-    dependency: transitive
-    description:
-      name: http
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "0.11.3+17"
-  http_multi_server:
-    dependency: transitive
-    description:
-      name: http_multi_server
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "2.0.5"
-  http_parser:
-    dependency: transitive
-    description:
-      name: http_parser
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "3.1.3"
-  io:
-    dependency: transitive
-    description:
-      name: io
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "0.3.3"
-  js:
-    dependency: transitive
-    description:
-      name: js
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "0.6.1+1"
-  json_rpc_2:
-    dependency: transitive
-    description:
-      name: json_rpc_2
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "2.0.9"
-  kernel:
-    dependency: transitive
-    description:
-      name: kernel
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "0.3.4"
-  logging:
-    dependency: transitive
-    description:
-      name: logging
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "0.11.3+2"
-  matcher:
-    dependency: transitive
-    description:
-      name: matcher
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "0.12.3+1"
-  meta:
-    dependency: transitive
-    description:
-      name: meta
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.1.6"
-  mime:
-    dependency: transitive
-    description:
-      name: mime
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "0.9.6+2"
-  multi_server_socket:
-    dependency: transitive
-    description:
-      name: multi_server_socket
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.0.2"
-  node_preamble:
-    dependency: transitive
-    description:
-      name: node_preamble
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.4.4"
-  package_config:
-    dependency: transitive
-    description:
-      name: package_config
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.0.5"
-  package_resolver:
-    dependency: transitive
-    description:
-      name: package_resolver
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.0.4"
-  path:
-    dependency: transitive
-    description:
-      name: path
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.6.2"
-  plugin:
-    dependency: transitive
-    description:
-      name: plugin
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "0.2.0+3"
-  pool:
-    dependency: transitive
-    description:
-      name: pool
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.3.6"
-  pub_semver:
-    dependency: transitive
-    description:
-      name: pub_semver
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.4.2"
-  quiver:
-    dependency: transitive
-    description:
-      name: quiver
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "2.0.0+1"
-  shelf:
-    dependency: transitive
-    description:
-      name: shelf
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "0.7.3+3"
-  shelf_packages_handler:
-    dependency: transitive
-    description:
-      name: shelf_packages_handler
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.0.4"
-  shelf_static:
-    dependency: transitive
-    description:
-      name: shelf_static
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "0.2.8"
-  shelf_web_socket:
-    dependency: transitive
-    description:
-      name: shelf_web_socket
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "0.2.2+4"
-  sky_engine:
-    dependency: transitive
-    description: flutter
-    source: sdk
-    version: "0.0.99"
-  source_map_stack_trace:
-    dependency: transitive
-    description:
-      name: source_map_stack_trace
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.1.5"
-  source_maps:
-    dependency: transitive
-    description:
-      name: source_maps
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "0.10.7"
-  source_span:
-    dependency: transitive
-    description:
-      name: source_span
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.4.1"
-  stack_trace:
-    dependency: transitive
-    description:
-      name: stack_trace
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.9.3"
-  stream_channel:
-    dependency: transitive
-    description:
-      name: stream_channel
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.6.8"
-  string_scanner:
-    dependency: transitive
-    description:
-      name: string_scanner
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.0.4"
-  term_glyph:
-    dependency: transitive
-    description:
-      name: term_glyph
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.0.1"
-  test:
-    dependency: transitive
-    description:
-      name: test
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.3.0"
-  typed_data:
-    dependency: transitive
-    description:
-      name: typed_data
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.1.6"
-  utf:
-    dependency: transitive
-    description:
-      name: utf
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "0.9.0+5"
-  vector_math:
-    dependency: transitive
-    description:
-      name: vector_math
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "2.0.8"
-  vm_service_client:
-    dependency: transitive
-    description:
-      name: vm_service_client
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "0.2.6"
-  watcher:
-    dependency: transitive
-    description:
-      name: watcher
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "0.9.7+10"
-  web_socket_channel:
-    dependency: transitive
-    description:
-      name: web_socket_channel
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.0.9"
-  yaml:
-    dependency: transitive
-    description:
-      name: yaml
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "2.1.15"
-sdks:
-  dart: ">=2.0.0-dev.68.0 <3.0.0"

pubspec.yaml

@@ -10,6 +10,7 @@ environment:
 dependencies:
   flutter:
     sdk: flutter
+  flutter_commons_lang: ^1.0.5
 
 dev_dependencies:
   flutter_test: