support for flutter 3.27 and removed deprecation warnings

lib/src/expander_theme_data.dart

@@ -55,11 +55,11 @@ class ExpanderThemeData {
 
   const ExpanderThemeData({
     this.color,
-    this.position: ExpanderPosition.start,
-    this.type: ExpanderType.caret,
-    this.size: _kDefaultExpanderSize,
-    this.modifier: ExpanderModifier.none,
-    this.animated: true,
+    this.position = ExpanderPosition.start,
+    this.type = ExpanderType.caret,
+    this.size = _kDefaultExpanderSize,
+    this.modifier = ExpanderModifier.none,
+    this.animated = true,
   });
 
   /// Creates an expander icon theme with some reasonable default values.
@@ -129,5 +129,5 @@ class ExpanderThemeData {
 
   @override
   int get hashCode =>
-      hashValues(color, position, type, size, modifier, animated);
+      Object.hash(color, position, type, size, modifier, animated);
 }

lib/src/models/node.dart

@@ -41,9 +41,9 @@ class Node<T> {
   const Node({
     required this.key,
     required this.label,
-    this.children: const [],
-    this.expanded: false,
-    this.parent: false,
+    this.children = const [],
+    this.expanded = false,
+    this.parent = false,
     this.icon,
     this.data,
   });
@@ -152,7 +152,7 @@ class Node<T> {
 
   @override
   int get hashCode {
-    return hashValues(
+    return Object.hash(
       key,
       label,
       icon,

lib/src/tree_view.dart

@@ -87,10 +87,10 @@ class TreeView<T> extends InheritedWidget {
     this.onNodeLongPress,
     this.physics,
     this.onExpansionChanged,
-    this.allowParentSelect: false,
-    this.supportParentDoubleTap: false,
-    this.shrinkWrap: false,
-    this.primary: true,
+    this.allowParentSelect = false,
+    this.supportParentDoubleTap = false,
+    this.shrinkWrap = false,
+    this.primary = true,
     this.nodeBuilder,
     TreeViewTheme? theme,
   })  : this.theme = theme ?? const TreeViewTheme(),

lib/src/tree_view_controller.dart

@@ -38,7 +38,7 @@ class TreeViewController<T> {
   final String? selectedKey;
 
   TreeViewController({
-    this.children: const [],
+    this.children = const [],
     this.selectedKey,
   });
 
@@ -60,7 +60,7 @@ class TreeViewController<T> {
   ///   controller = controller.loadJSON(json: jsonString);
   /// });
   /// ```
-  TreeViewController loadJSON({String json: '[]'}) {
+  TreeViewController loadJSON({String json = '[]'}) {
     List jsonList = jsonDecode(json);
     List<Map<String, dynamic>> list = List<Map<String, dynamic>>.from(jsonList);
     return loadMap(list: list);
@@ -74,7 +74,7 @@ class TreeViewController<T> {
   ///   controller = controller.loadMap(map: dataMap);
   /// });
   /// ```
-  TreeViewController loadMap({List<Map<String, dynamic>> list: const []}) {
+  TreeViewController loadMap({List<Map<String, dynamic>> list = const []}) {
     List<Node<T>> treeData =
         list.map((Map<String, dynamic> item) => Node<T>.fromMap(item)).toList();
     return TreeViewController(
@@ -100,7 +100,7 @@ class TreeViewController<T> {
     Node<T> newNode, {
     Node<T>? parent,
     int? index,
-    InsertMode mode: InsertMode.append,
+    InsertMode mode = InsertMode.append,
   }) {
     List<Node<T>> _data =
         addNode(key, newNode, parent: parent, mode: mode, index: index);
@@ -394,7 +394,7 @@ class TreeViewController<T> {
     Node<T> newNode, {
     Node<T>? parent,
     int? index,
-    InsertMode mode: InsertMode.append,
+    InsertMode mode = InsertMode.append,
   }) {
     List<Node<T>> _children = parent == null ? this.children : parent.children;
     return _children.map((Node<T> child) {

lib/src/tree_view_theme.dart

@@ -59,19 +59,19 @@ class TreeViewTheme {
   final Duration expandSpeed;
 
   const TreeViewTheme({
-    this.colorScheme: const ColorScheme.light(),
-    this.iconTheme: const IconThemeData.fallback(),
-    this.expanderTheme: const ExpanderThemeData.fallback(),
-    this.labelStyle: const TextStyle(),
-    this.parentLabelStyle: const TextStyle(fontWeight: FontWeight.bold),
+    this.colorScheme = const ColorScheme.light(),
+    this.iconTheme = const IconThemeData.fallback(),
+    this.expanderTheme = const ExpanderThemeData.fallback(),
+    this.labelStyle = const TextStyle(),
+    this.parentLabelStyle = const TextStyle(fontWeight: FontWeight.bold),
     this.labelOverflow,
     this.parentLabelOverflow,
-    this.levelPadding: _kDefaultLevelPadding,
-    this.dense: true,
+    this.levelPadding = _kDefaultLevelPadding,
+    this.dense = true,
     this.verticalSpacing,
     this.horizontalSpacing,
-    this.iconPadding: 8,
-    this.expandSpeed: const Duration(milliseconds: _kExpandSpeed),
+    this.iconPadding = 8,
+    this.expandSpeed = const Duration(milliseconds: _kExpandSpeed),
   });
 
   /// Creates a [TreeView] theme with some reasonable default values.
@@ -154,7 +154,7 @@ class TreeViewTheme {
 
   @override
   int get hashCode {
-    return hashValues(
+    return Object.hash(
         colorScheme,
         levelPadding,
         iconPadding,

lib/src/utilities.dart

@@ -9,7 +9,7 @@ class Utilities {
   static const Color WHITE = Color.fromARGB(255, 255, 255, 255);
 
   static String toRGBA(Color color) {
-    return 'rgba(${color.red},${color.green},${color.blue},${color.alpha / 255})';
+    return 'rgba(${color.r},${color.g},${color.b},${color.a / 255})';
   }
 
   static Color textColor(Color color) {