-Updated flutter version [3.16.4] & Dart[3.2.3]

-[breaking change]Remove the colon-syntax for default values ,to make project compatible for Dart 3 and above
Reported issue: dart-lang/language#2357

lib/pull_to_refresh.dart

@@ -12,6 +12,7 @@ export 'src/indicator/waterdrop_header.dart';
 export 'src/indicator/custom_indicator.dart';
 export 'src/internals/refresh_physics.dart';
 export "src/internals/indicator_wrap.dart";
+export 'src/internals/slivers.dart';
 export 'src/indicator/link_indicator.dart';
 export 'src/indicator/material_indicator.dart';
 export 'src/indicator/bezier_indicator.dart';

lib/src/indicator/bezier_indicator.dart

@@ -4,15 +4,11 @@
  * Time:  2019-08-02 19:20
  */
 
-import 'package:flutter/animation.dart';
-import 'package:flutter/cupertino.dart';
-import 'package:pull_to_refresh/pull_to_refresh.dart';
-import 'package:flutter/widgets.dart';
 import 'package:flutter/material.dart'
     hide RefreshIndicator, RefreshIndicatorState;
-import 'package:pull_to_refresh/src/internals/indicator_wrap.dart';
 import 'dart:math' as math;
 import 'package:flutter/physics.dart';
+import 'package:pull_to_refresh/pull_to_refresh.dart';
 
 enum BezierDismissType { None, RectSpread, ScaleToCenter }
 
@@ -38,15 +34,15 @@ class BezierHeader extends RefreshIndicator {
   final double rectHeight;
 
   BezierHeader(
-      {this.child: const Text(""),
+      {this.child = const Text(""),
       this.onOffsetChange,
       this.onModeChange,
       this.readyRefresh,
-      this.enableChildOverflow: false,
+      this.enableChildOverflow = false,
       this.endRefresh,
       this.onResetValue,
-      this.dismissType: BezierDismissType.RectSpread,
-      this.rectHeight: 70,
+      this.dismissType = BezierDismissType.RectSpread,
+      this.rectHeight = 70,
       this.bezierColor})
       : super(refreshStyle: RefreshStyle.UnFollow, height: rectHeight);
 
@@ -306,12 +302,12 @@ class BezierCircleHeader extends StatefulWidget {
 
   BezierCircleHeader(
       {this.bezierColor,
-      this.rectHeight: 70,
-      this.circleColor: Colors.white,
-      this.enableChildOverflow: false,
-      this.dismissType: BezierDismissType.RectSpread,
-      this.circleType: BezierCircleType.Progress,
-      this.circleRadius: 12});
+      this.rectHeight = 70,
+      this.circleColor = Colors.white,
+      this.enableChildOverflow = false,
+      this.dismissType = BezierDismissType.RectSpread,
+      this.circleType = BezierCircleType.Progress,
+      this.circleRadius = 12});
 
   @override
   State<StatefulWidget> createState() {

lib/src/indicator/classic_indicator.dart

@@ -6,10 +6,7 @@
 
 import 'package:flutter/material.dart'
     hide RefreshIndicator, RefreshIndicatorState;
-import 'package:flutter/widgets.dart';
 import '../../pull_to_refresh.dart';
-import '../internals/indicator_wrap.dart';
-import '../smart_refresher.dart';
 import 'package:flutter/cupertino.dart';
 import 'package:flutter/foundation.dart';
 
@@ -59,11 +56,11 @@ class ClassicHeader extends RefreshIndicator {
 
   const ClassicHeader({
     Key? key,
-    RefreshStyle refreshStyle: RefreshStyle.Follow,
-    double height: 60.0,
-    Duration completeDuration: const Duration(milliseconds: 600),
+    RefreshStyle refreshStyle = RefreshStyle.Follow,
+    double height = 60.0,
+    Duration completeDuration = const Duration(milliseconds: 600),
     this.outerBuilder,
-    this.textStyle: const TextStyle(color: Colors.grey),
+    this.textStyle = const TextStyle(color: Colors.grey),
     this.releaseText,
     this.refreshingText,
     this.canTwoLevelIcon,
@@ -72,11 +69,11 @@ class ClassicHeader extends RefreshIndicator {
     this.completeText,
     this.failedText,
     this.idleText,
-    this.iconPos: IconPosition.left,
-    this.spacing: 15.0,
+    this.iconPos = IconPosition.left,
+    this.spacing = 15.0,
     this.refreshingIcon,
-    this.failedIcon: const Icon(Icons.error, color: Colors.grey),
-    this.completeIcon: const Icon(Icons.done, color: Colors.grey),
+    this.failedIcon = const Icon(Icons.error, color: Colors.grey),
+    this.completeIcon = const Icon(Icons.done, color: Colors.grey),
     this.idleIcon = const Icon(Icons.arrow_downward, color: Colors.grey),
     this.releaseIcon = const Icon(Icons.refresh, color: Colors.grey),
   }) : super(
@@ -217,22 +214,22 @@ class ClassicFooter extends LoadIndicator {
   const ClassicFooter({
     Key? key,
     VoidCallback? onClick,
-    LoadStyle loadStyle: LoadStyle.ShowAlways,
-    double height: 60.0,
+    LoadStyle loadStyle = LoadStyle.ShowAlways,
+    double height = 60.0,
     this.outerBuilder,
-    this.textStyle: const TextStyle(color: Colors.grey),
+    this.textStyle = const TextStyle(color: Colors.grey),
     this.loadingText,
     this.noDataText,
     this.noMoreIcon,
     this.idleText,
     this.failedText,
     this.canLoadingText,
-    this.failedIcon: const Icon(Icons.error, color: Colors.grey),
-    this.iconPos: IconPosition.left,
-    this.spacing: 15.0,
-    this.completeDuration: const Duration(milliseconds: 300),
+    this.failedIcon = const Icon(Icons.error, color: Colors.grey),
+    this.iconPos = IconPosition.left,
+    this.spacing = 15.0,
+    this.completeDuration = const Duration(milliseconds: 300),
     this.loadingIcon,
-    this.canLoadingIcon: const Icon(Icons.autorenew, color: Colors.grey),
+    this.canLoadingIcon = const Icon(Icons.autorenew, color: Colors.grey),
     this.idleIcon = const Icon(Icons.arrow_upward, color: Colors.grey),
   }) : super(
           key: key,

lib/src/indicator/custom_indicator.dart

@@ -70,9 +70,9 @@ class CustomHeader extends RefreshIndicator {
     this.onOffsetChange,
     this.onModeChange,
     this.onResetValue,
-    double height: 60.0,
-    Duration completeDuration: const Duration(milliseconds: 600),
-    RefreshStyle refreshStyle: RefreshStyle.Follow,
+    double height = 60.0,
+    Duration completeDuration = const Duration(milliseconds: 600),
+    RefreshStyle refreshStyle = RefreshStyle.Follow,
   }) : super(
             key: key,
             completeDuration: completeDuration,
@@ -147,12 +147,12 @@ class CustomFooter extends LoadIndicator {
 
   const CustomFooter({
     Key? key,
-    double height: 60.0,
+    double height = 60.0,
     this.onModeChange,
     this.onOffsetChange,
     this.readyLoading,
     this.endLoading,
-    LoadStyle loadStyle: LoadStyle.ShowAlways,
+    LoadStyle loadStyle = LoadStyle.ShowAlways,
     required this.builder,
     Function? onClick,
   }) : super(

lib/src/indicator/link_indicator.dart

@@ -3,8 +3,8 @@
  * Email: peng8350@gmail.com
  * Time:  2019-06-26 13:17
 */
-import 'package:pull_to_refresh/pull_to_refresh.dart';
 import 'package:flutter/widgets.dart';
+import 'package:pull_to_refresh/pull_to_refresh.dart';
 
 /// enable header link other header place outside the viewport
 class LinkHeader extends RefreshIndicator {
@@ -14,9 +14,9 @@ class LinkHeader extends RefreshIndicator {
   const LinkHeader(
       {Key? key,
       required this.linkKey,
-      double height: 0.0,
+      double height = 0.0,
       RefreshStyle? refreshStyle,
-      Duration completeDuration: const Duration(milliseconds: 200)})
+      Duration completeDuration = const Duration(milliseconds: 200)})
       : super(
             height: height,
             refreshStyle: refreshStyle,
@@ -81,8 +81,8 @@ class LinkFooter extends LoadIndicator {
   const LinkFooter(
       {Key? key,
       required this.linkKey,
-      double height: 0.0,
-      LoadStyle loadStyle: LoadStyle.ShowAlways})
+      double height = 0.0,
+      LoadStyle loadStyle = LoadStyle.ShowAlways})
       : super(height: height, loadStyle: loadStyle, key: key);
 
   @override

lib/src/indicator/material_indicator.dart

@@ -4,10 +4,8 @@
  * Time: 2019/5/19 下午9:23
  */
 
-import 'package:flutter/cupertino.dart';
 import 'package:flutter/material.dart'
     hide RefreshIndicator, RefreshIndicatorState;
-import 'package:flutter/widgets.dart';
 import '../internals/indicator_wrap.dart';
 import '../smart_refresher.dart';
 
@@ -34,12 +32,12 @@ class MaterialClassicHeader extends RefreshIndicator {
 
   const MaterialClassicHeader({
     Key? key,
-    double height: 80.0,
+    double height = 80.0,
     this.semanticsLabel,
     this.semanticsValue,
     this.color,
-    double offset: 0,
-    this.distance: 50.0,
+    double offset = 0,
+    this.distance = 50.0,
     this.backgroundColor,
   }) : super(
           key: key,
@@ -95,7 +93,7 @@ class _MaterialClassicHeaderState
   @override
   void didUpdateWidget(covariant MaterialClassicHeader oldWidget) {
     // TODO: implement didUpdateWidget
-    _position = Scrollable.of(context)!.position;
+    _position = Scrollable.of(context).position;
     super.didUpdateWidget(oldWidget);
   }
 
@@ -113,7 +111,7 @@ class _MaterialClassicHeaderState
           alignment: Alignment.topCenter,
           child: RefreshProgressIndicator(
             semanticsLabel: widget.semanticsLabel ??
-                MaterialLocalizations?.of(context)
+                MaterialLocalizations.of(context)
                     .refreshIndicatorSemanticLabel,
             semanticsValue: widget.semanticsValue,
             value: floating ? null : _valueAni.value,
@@ -157,7 +155,7 @@ class _MaterialClassicHeaderState
   @override
   void didChangeDependencies() {
     final ThemeData theme = Theme.of(context);
-    _position = Scrollable.of(context)!.position;
+    _position = Scrollable.of(context).position;
     _valueColor = _positionController.drive(
       ColorTween(
         begin: (widget.color ?? theme.primaryColor).withOpacity(0.0),
@@ -195,10 +193,10 @@ class WaterDropMaterialHeader extends MaterialClassicHeader {
   const WaterDropMaterialHeader({
     Key? key,
     String? semanticsLabel,
-    double distance: 60.0,
-    double offset: 0,
+    double distance = 60.0,
+    double offset = 0,
     String? semanticsValue,
-    Color color: Colors.white,
+    Color color = Colors.white,
     Color? backgroundColor,
   }) : super(
             key: key,

lib/src/indicator/twolevel_indicator.dart

@@ -5,8 +5,6 @@
  */
 
 import 'package:flutter/material.dart';
-import 'package:flutter/rendering.dart';
-import 'package:flutter/widgets.dart';
 import 'classic_indicator.dart';
 import '../smart_refresher.dart';
 
@@ -89,23 +87,23 @@ class TwoLevelHeader extends StatelessWidget {
 
   const TwoLevelHeader(
       {Key? key,
-      this.height: 80.0,
+      this.height = 80.0,
       this.decoration,
-      this.displayAlignment: TwoLevelDisplayAlignment.fromBottom,
-      this.completeDuration: const Duration(milliseconds: 600),
-      this.textStyle: const TextStyle(color: const Color(0xff555555)),
+      this.displayAlignment = TwoLevelDisplayAlignment.fromBottom,
+      this.completeDuration = const Duration(milliseconds: 600),
+      this.textStyle = const TextStyle(color: const Color(0xff555555)),
       this.releaseText,
       this.refreshingText,
       this.canTwoLevelIcon,
       this.canTwoLevelText,
       this.completeText,
       this.failedText,
       this.idleText,
-      this.iconPos: IconPosition.left,
-      this.spacing: 15.0,
+      this.iconPos = IconPosition.left,
+      this.spacing = 15.0,
       this.refreshingIcon,
-      this.failedIcon: const Icon(Icons.error, color: Colors.grey),
-      this.completeIcon: const Icon(Icons.done, color: Colors.grey),
+      this.failedIcon = const Icon(Icons.error, color: Colors.grey),
+      this.completeIcon = const Icon(Icons.done, color: Colors.grey),
       this.idleIcon = const Icon(Icons.arrow_downward, color: Colors.grey),
       this.releaseIcon = const Icon(Icons.refresh, color: Colors.grey),
       this.twoLevelWidget});

lib/src/indicator/waterdrop_header.dart

@@ -7,12 +7,9 @@
 import 'dart:async';
 import 'package:flutter/material.dart'
     hide RefreshIndicatorState, RefreshIndicator;
-import 'package:flutter/widgets.dart';
 import 'package:flutter/foundation.dart';
 import 'package:pull_to_refresh/pull_to_refresh.dart';
-import '../internals/indicator_wrap.dart';
 import 'package:flutter/cupertino.dart';
-import '../smart_refresher.dart';
 
 /// QQ ios refresh  header effect
 class WaterDropHeader extends RefreshIndicator {
@@ -35,10 +32,10 @@ class WaterDropHeader extends RefreshIndicator {
     Key? key,
     this.refresh,
     this.complete,
-    Duration completeDuration: const Duration(milliseconds: 600),
+    Duration completeDuration = const Duration(milliseconds: 600),
     this.failed,
-    this.waterDropColor: Colors.grey,
-    this.idleIcon: const Icon(
+    this.waterDropColor = Colors.grey,
+    this.idleIcon = const Icon(
       Icons.autorenew,
       size: 15,
       color: Colors.white,
@@ -165,17 +162,17 @@ class _WaterDropHeaderState extends RefreshIndicatorState<WaterDropHeader>
                     ),
                   ),
                   quarterTurns:
-                      Scrollable.of(context)!.axisDirection == AxisDirection.up
+                      Scrollable.of(context).axisDirection == AxisDirection.up
                           ? 10
                           : 0,
                 ),
                 Container(
                   alignment:
-                      Scrollable.of(context)!.axisDirection == AxisDirection.up
+                      Scrollable.of(context).axisDirection == AxisDirection.up
                           ? Alignment.bottomCenter
                           : Alignment.topCenter,
                   margin:
-                      Scrollable.of(context)!.axisDirection == AxisDirection.up
+                      Scrollable.of(context).axisDirection == AxisDirection.up
                           ? EdgeInsets.only(bottom: 12.0)
                           : EdgeInsets.only(top: 12.0),
                   child: widget.idleIcon,