[flutter] widget state only re-creates resources if asset specified to widget constructor has changed.

spine-flutter/example/lib/main.dart

@@ -1,6 +1,5 @@
 import 'package:spine_flutter/spine_flutter.dart';
 import 'package:flutter/material.dart';
-import 'package:spine_flutter_example/animated_login.dart';
 import 'package:spine_flutter_example/debug_rendering.dart';
 
 import 'animation_state_events.dart';
@@ -68,18 +67,6 @@ class ExampleSelector extends StatelessWidget {
             },
           ),
           spacer,
-          ElevatedButton(
-            child: const Text('Animated login'),
-            onPressed: () {
-              Navigator.push(
-                context,
-                MaterialPageRoute<void>(
-                  builder: (context) => const AnimatedLogin(),
-                ),
-              );
-            },
-          ),
-          spacer,
           ElevatedButton(
             child: const Text('Dress Up'),
             onPressed: () {

spine-flutter/lib/assets/libspine_flutter.js

@@ -118,25 +118,25 @@ a._spine_bone_data_get_shear_y=function(){return(a._spine_bone_data_get_shear_y=
 a._spine_bone_data_set_transform_mode=function(){return(a._spine_bone_data_set_transform_mode=a.asm.spine_bone_data_set_transform_mode).apply(null,arguments)};a._spine_bone_data_is_skin_required=function(){return(a._spine_bone_data_is_skin_required=a.asm.spine_bone_data_is_skin_required).apply(null,arguments)};a._spine_bone_data_set_is_skin_required=function(){return(a._spine_bone_data_set_is_skin_required=a.asm.spine_bone_data_set_is_skin_required).apply(null,arguments)};
 a._spine_bone_data_get_color=function(){return(a._spine_bone_data_get_color=a.asm.spine_bone_data_get_color).apply(null,arguments)};a._spine_bone_data_set_color=function(){return(a._spine_bone_data_set_color=a.asm.spine_bone_data_set_color).apply(null,arguments)};a._spine_bone_set_is_y_down=function(){return(a._spine_bone_set_is_y_down=a.asm.spine_bone_set_is_y_down).apply(null,arguments)};
 a._spine_bone_get_is_y_down=function(){return(a._spine_bone_get_is_y_down=a.asm.spine_bone_get_is_y_down).apply(null,arguments)};a._spine_bone_update=function(){return(a._spine_bone_update=a.asm.spine_bone_update).apply(null,arguments)};a._spine_bone_update_world_transform=function(){return(a._spine_bone_update_world_transform=a.asm.spine_bone_update_world_transform).apply(null,arguments)};
-a._spine_bone_update_world_transform_with=function(){return(a._spine_bone_update_world_transform_with=a.asm.spine_bone_update_world_transform_with).apply(null,arguments)};a._spine_bone_set_to_setup_pose=function(){return(a._spine_bone_set_to_setup_pose=a.asm.spine_bone_set_to_setup_pose).apply(null,arguments)};a._spine_bone_world_to_local=function(){return(a._spine_bone_world_to_local=a.asm.spine_bone_world_to_local).apply(null,arguments)};
-a._spine_bone_local_to_world=function(){return(a._spine_bone_local_to_world=a.asm.spine_bone_local_to_world).apply(null,arguments)};a._spine_bone_world_to_local_rotation=function(){return(a._spine_bone_world_to_local_rotation=a.asm.spine_bone_world_to_local_rotation).apply(null,arguments)};a._spine_bone_local_to_world_rotation=function(){return(a._spine_bone_local_to_world_rotation=a.asm.spine_bone_local_to_world_rotation).apply(null,arguments)};
-a._spine_bone_rotate_world=function(){return(a._spine_bone_rotate_world=a.asm.spine_bone_rotate_world).apply(null,arguments)};a._spine_bone_get_world_to_local_rotation_x=function(){return(a._spine_bone_get_world_to_local_rotation_x=a.asm.spine_bone_get_world_to_local_rotation_x).apply(null,arguments)};a._spine_bone_get_world_to_local_rotation_y=function(){return(a._spine_bone_get_world_to_local_rotation_y=a.asm.spine_bone_get_world_to_local_rotation_y).apply(null,arguments)};
-a._spine_bone_get_data=function(){return(a._spine_bone_get_data=a.asm.spine_bone_get_data).apply(null,arguments)};a._spine_bone_get_skeleton=function(){return(a._spine_bone_get_skeleton=a.asm.spine_bone_get_skeleton).apply(null,arguments)};a._spine_bone_get_parent=function(){return(a._spine_bone_get_parent=a.asm.spine_bone_get_parent).apply(null,arguments)};a._spine_bone_get_num_children=function(){return(a._spine_bone_get_num_children=a.asm.spine_bone_get_num_children).apply(null,arguments)};
-a._spine_bone_get_children=function(){return(a._spine_bone_get_children=a.asm.spine_bone_get_children).apply(null,arguments)};a._spine_bone_get_x=function(){return(a._spine_bone_get_x=a.asm.spine_bone_get_x).apply(null,arguments)};a._spine_bone_set_x=function(){return(a._spine_bone_set_x=a.asm.spine_bone_set_x).apply(null,arguments)};a._spine_bone_get_y=function(){return(a._spine_bone_get_y=a.asm.spine_bone_get_y).apply(null,arguments)};
-a._spine_bone_set_y=function(){return(a._spine_bone_set_y=a.asm.spine_bone_set_y).apply(null,arguments)};a._spine_bone_get_rotation=function(){return(a._spine_bone_get_rotation=a.asm.spine_bone_get_rotation).apply(null,arguments)};a._spine_bone_set_rotation=function(){return(a._spine_bone_set_rotation=a.asm.spine_bone_set_rotation).apply(null,arguments)};a._spine_bone_get_scale_x=function(){return(a._spine_bone_get_scale_x=a.asm.spine_bone_get_scale_x).apply(null,arguments)};
-a._spine_bone_set_scale_x=function(){return(a._spine_bone_set_scale_x=a.asm.spine_bone_set_scale_x).apply(null,arguments)};a._spine_bone_get_scale_y=function(){return(a._spine_bone_get_scale_y=a.asm.spine_bone_get_scale_y).apply(null,arguments)};a._spine_bone_set_scale_y=function(){return(a._spine_bone_set_scale_y=a.asm.spine_bone_set_scale_y).apply(null,arguments)};a._spine_bone_get_shear_x=function(){return(a._spine_bone_get_shear_x=a.asm.spine_bone_get_shear_x).apply(null,arguments)};
-a._spine_bone_set_shear_x=function(){return(a._spine_bone_set_shear_x=a.asm.spine_bone_set_shear_x).apply(null,arguments)};a._spine_bone_get_shear_y=function(){return(a._spine_bone_get_shear_y=a.asm.spine_bone_get_shear_y).apply(null,arguments)};a._spine_bone_set_shear_y=function(){return(a._spine_bone_set_shear_y=a.asm.spine_bone_set_shear_y).apply(null,arguments)};
-a._spine_bone_get_applied_rotation=function(){return(a._spine_bone_get_applied_rotation=a.asm.spine_bone_get_applied_rotation).apply(null,arguments)};a._spine_bone_set_applied_rotation=function(){return(a._spine_bone_set_applied_rotation=a.asm.spine_bone_set_applied_rotation).apply(null,arguments)};a._spine_bone_get_a_x=function(){return(a._spine_bone_get_a_x=a.asm.spine_bone_get_a_x).apply(null,arguments)};
-a._spine_bone_set_a_x=function(){return(a._spine_bone_set_a_x=a.asm.spine_bone_set_a_x).apply(null,arguments)};a._spine_bone_get_a_y=function(){return(a._spine_bone_get_a_y=a.asm.spine_bone_get_a_y).apply(null,arguments)};a._spine_bone_set_a_y=function(){return(a._spine_bone_set_a_y=a.asm.spine_bone_set_a_y).apply(null,arguments)};a._spine_bone_get_a_scale_x=function(){return(a._spine_bone_get_a_scale_x=a.asm.spine_bone_get_a_scale_x).apply(null,arguments)};
-a._spine_bone_set_a_scale_x=function(){return(a._spine_bone_set_a_scale_x=a.asm.spine_bone_set_a_scale_x).apply(null,arguments)};a._spine_bone_get_a_scale_y=function(){return(a._spine_bone_get_a_scale_y=a.asm.spine_bone_get_a_scale_y).apply(null,arguments)};a._spine_bone_set_a_scale_y=function(){return(a._spine_bone_set_a_scale_y=a.asm.spine_bone_set_a_scale_y).apply(null,arguments)};
-a._spine_bone_get_a_shear_x=function(){return(a._spine_bone_get_a_shear_x=a.asm.spine_bone_get_a_shear_x).apply(null,arguments)};a._spine_bone_set_a_shear_x=function(){return(a._spine_bone_set_a_shear_x=a.asm.spine_bone_set_a_shear_x).apply(null,arguments)};a._spine_bone_get_a_shear_y=function(){return(a._spine_bone_get_a_shear_y=a.asm.spine_bone_get_a_shear_y).apply(null,arguments)};a._spine_bone_get_a=function(){return(a._spine_bone_get_a=a.asm.spine_bone_get_a).apply(null,arguments)};
-a._spine_bone_set_a=function(){return(a._spine_bone_set_a=a.asm.spine_bone_set_a).apply(null,arguments)};a._spine_bone_get_b=function(){return(a._spine_bone_get_b=a.asm.spine_bone_get_b).apply(null,arguments)};a._spine_bone_set_b=function(){return(a._spine_bone_set_b=a.asm.spine_bone_set_b).apply(null,arguments)};a._spine_bone_get_c=function(){return(a._spine_bone_get_c=a.asm.spine_bone_get_c).apply(null,arguments)};
-a._spine_bone_set_c=function(){return(a._spine_bone_set_c=a.asm.spine_bone_set_c).apply(null,arguments)};a._spine_bone_get_d=function(){return(a._spine_bone_get_d=a.asm.spine_bone_get_d).apply(null,arguments)};a._spine_bone_set_d=function(){return(a._spine_bone_set_d=a.asm.spine_bone_set_d).apply(null,arguments)};a._spine_bone_get_world_x=function(){return(a._spine_bone_get_world_x=a.asm.spine_bone_get_world_x).apply(null,arguments)};
-a._spine_bone_set_world_x=function(){return(a._spine_bone_set_world_x=a.asm.spine_bone_set_world_x).apply(null,arguments)};a._spine_bone_get_world_y=function(){return(a._spine_bone_get_world_y=a.asm.spine_bone_get_world_y).apply(null,arguments)};a._spine_bone_set_world_y=function(){return(a._spine_bone_set_world_y=a.asm.spine_bone_set_world_y).apply(null,arguments)};
-a._spine_bone_get_world_rotation_x=function(){return(a._spine_bone_get_world_rotation_x=a.asm.spine_bone_get_world_rotation_x).apply(null,arguments)};a._spine_bone_get_world_rotation_y=function(){return(a._spine_bone_get_world_rotation_y=a.asm.spine_bone_get_world_rotation_y).apply(null,arguments)};a._spine_bone_get_world_scale_x=function(){return(a._spine_bone_get_world_scale_x=a.asm.spine_bone_get_world_scale_x).apply(null,arguments)};
-a._spine_bone_get_world_scale_y=function(){return(a._spine_bone_get_world_scale_y=a.asm.spine_bone_get_world_scale_y).apply(null,arguments)};a._spine_bone_get_is_active=function(){return(a._spine_bone_get_is_active=a.asm.spine_bone_get_is_active).apply(null,arguments)};a._spine_bone_set_is_active=function(){return(a._spine_bone_set_is_active=a.asm.spine_bone_set_is_active).apply(null,arguments)};
-a._spine_attachment_get_name=function(){return(a._spine_attachment_get_name=a.asm.spine_attachment_get_name).apply(null,arguments)};a._spine_attachment_get_type=function(){return(a._spine_attachment_get_type=a.asm.spine_attachment_get_type).apply(null,arguments)};a._spine_attachment_copy=function(){return(a._spine_attachment_copy=a.asm.spine_attachment_copy).apply(null,arguments)};
-a._spine_attachment_dispose=function(){return(a._spine_attachment_dispose=a.asm.spine_attachment_dispose).apply(null,arguments)};a._spine_point_attachment_compute_world_position=function(){return(a._spine_point_attachment_compute_world_position=a.asm.spine_point_attachment_compute_world_position).apply(null,arguments)};
+a._spine_bone_update_world_transform_with=function(){return(a._spine_bone_update_world_transform_with=a.asm.spine_bone_update_world_transform_with).apply(null,arguments)};a._spine_bone_update_applied_transform=function(){return(a._spine_bone_update_applied_transform=a.asm.spine_bone_update_applied_transform).apply(null,arguments)};a._spine_bone_set_to_setup_pose=function(){return(a._spine_bone_set_to_setup_pose=a.asm.spine_bone_set_to_setup_pose).apply(null,arguments)};
+a._spine_bone_world_to_local=function(){return(a._spine_bone_world_to_local=a.asm.spine_bone_world_to_local).apply(null,arguments)};a._spine_bone_local_to_world=function(){return(a._spine_bone_local_to_world=a.asm.spine_bone_local_to_world).apply(null,arguments)};a._spine_bone_world_to_local_rotation=function(){return(a._spine_bone_world_to_local_rotation=a.asm.spine_bone_world_to_local_rotation).apply(null,arguments)};
+a._spine_bone_local_to_world_rotation=function(){return(a._spine_bone_local_to_world_rotation=a.asm.spine_bone_local_to_world_rotation).apply(null,arguments)};a._spine_bone_rotate_world=function(){return(a._spine_bone_rotate_world=a.asm.spine_bone_rotate_world).apply(null,arguments)};a._spine_bone_get_world_to_local_rotation_x=function(){return(a._spine_bone_get_world_to_local_rotation_x=a.asm.spine_bone_get_world_to_local_rotation_x).apply(null,arguments)};
+a._spine_bone_get_world_to_local_rotation_y=function(){return(a._spine_bone_get_world_to_local_rotation_y=a.asm.spine_bone_get_world_to_local_rotation_y).apply(null,arguments)};a._spine_bone_get_data=function(){return(a._spine_bone_get_data=a.asm.spine_bone_get_data).apply(null,arguments)};a._spine_bone_get_skeleton=function(){return(a._spine_bone_get_skeleton=a.asm.spine_bone_get_skeleton).apply(null,arguments)};
+a._spine_bone_get_parent=function(){return(a._spine_bone_get_parent=a.asm.spine_bone_get_parent).apply(null,arguments)};a._spine_bone_get_num_children=function(){return(a._spine_bone_get_num_children=a.asm.spine_bone_get_num_children).apply(null,arguments)};a._spine_bone_get_children=function(){return(a._spine_bone_get_children=a.asm.spine_bone_get_children).apply(null,arguments)};a._spine_bone_get_x=function(){return(a._spine_bone_get_x=a.asm.spine_bone_get_x).apply(null,arguments)};
+a._spine_bone_set_x=function(){return(a._spine_bone_set_x=a.asm.spine_bone_set_x).apply(null,arguments)};a._spine_bone_get_y=function(){return(a._spine_bone_get_y=a.asm.spine_bone_get_y).apply(null,arguments)};a._spine_bone_set_y=function(){return(a._spine_bone_set_y=a.asm.spine_bone_set_y).apply(null,arguments)};a._spine_bone_get_rotation=function(){return(a._spine_bone_get_rotation=a.asm.spine_bone_get_rotation).apply(null,arguments)};
+a._spine_bone_set_rotation=function(){return(a._spine_bone_set_rotation=a.asm.spine_bone_set_rotation).apply(null,arguments)};a._spine_bone_get_scale_x=function(){return(a._spine_bone_get_scale_x=a.asm.spine_bone_get_scale_x).apply(null,arguments)};a._spine_bone_set_scale_x=function(){return(a._spine_bone_set_scale_x=a.asm.spine_bone_set_scale_x).apply(null,arguments)};a._spine_bone_get_scale_y=function(){return(a._spine_bone_get_scale_y=a.asm.spine_bone_get_scale_y).apply(null,arguments)};
+a._spine_bone_set_scale_y=function(){return(a._spine_bone_set_scale_y=a.asm.spine_bone_set_scale_y).apply(null,arguments)};a._spine_bone_get_shear_x=function(){return(a._spine_bone_get_shear_x=a.asm.spine_bone_get_shear_x).apply(null,arguments)};a._spine_bone_set_shear_x=function(){return(a._spine_bone_set_shear_x=a.asm.spine_bone_set_shear_x).apply(null,arguments)};a._spine_bone_get_shear_y=function(){return(a._spine_bone_get_shear_y=a.asm.spine_bone_get_shear_y).apply(null,arguments)};
+a._spine_bone_set_shear_y=function(){return(a._spine_bone_set_shear_y=a.asm.spine_bone_set_shear_y).apply(null,arguments)};a._spine_bone_get_applied_rotation=function(){return(a._spine_bone_get_applied_rotation=a.asm.spine_bone_get_applied_rotation).apply(null,arguments)};a._spine_bone_set_applied_rotation=function(){return(a._spine_bone_set_applied_rotation=a.asm.spine_bone_set_applied_rotation).apply(null,arguments)};
+a._spine_bone_get_a_x=function(){return(a._spine_bone_get_a_x=a.asm.spine_bone_get_a_x).apply(null,arguments)};a._spine_bone_set_a_x=function(){return(a._spine_bone_set_a_x=a.asm.spine_bone_set_a_x).apply(null,arguments)};a._spine_bone_get_a_y=function(){return(a._spine_bone_get_a_y=a.asm.spine_bone_get_a_y).apply(null,arguments)};a._spine_bone_set_a_y=function(){return(a._spine_bone_set_a_y=a.asm.spine_bone_set_a_y).apply(null,arguments)};
+a._spine_bone_get_a_scale_x=function(){return(a._spine_bone_get_a_scale_x=a.asm.spine_bone_get_a_scale_x).apply(null,arguments)};a._spine_bone_set_a_scale_x=function(){return(a._spine_bone_set_a_scale_x=a.asm.spine_bone_set_a_scale_x).apply(null,arguments)};a._spine_bone_get_a_scale_y=function(){return(a._spine_bone_get_a_scale_y=a.asm.spine_bone_get_a_scale_y).apply(null,arguments)};
+a._spine_bone_set_a_scale_y=function(){return(a._spine_bone_set_a_scale_y=a.asm.spine_bone_set_a_scale_y).apply(null,arguments)};a._spine_bone_get_a_shear_x=function(){return(a._spine_bone_get_a_shear_x=a.asm.spine_bone_get_a_shear_x).apply(null,arguments)};a._spine_bone_set_a_shear_x=function(){return(a._spine_bone_set_a_shear_x=a.asm.spine_bone_set_a_shear_x).apply(null,arguments)};
+a._spine_bone_get_a_shear_y=function(){return(a._spine_bone_get_a_shear_y=a.asm.spine_bone_get_a_shear_y).apply(null,arguments)};a._spine_bone_get_a=function(){return(a._spine_bone_get_a=a.asm.spine_bone_get_a).apply(null,arguments)};a._spine_bone_set_a=function(){return(a._spine_bone_set_a=a.asm.spine_bone_set_a).apply(null,arguments)};a._spine_bone_get_b=function(){return(a._spine_bone_get_b=a.asm.spine_bone_get_b).apply(null,arguments)};
+a._spine_bone_set_b=function(){return(a._spine_bone_set_b=a.asm.spine_bone_set_b).apply(null,arguments)};a._spine_bone_get_c=function(){return(a._spine_bone_get_c=a.asm.spine_bone_get_c).apply(null,arguments)};a._spine_bone_set_c=function(){return(a._spine_bone_set_c=a.asm.spine_bone_set_c).apply(null,arguments)};a._spine_bone_get_d=function(){return(a._spine_bone_get_d=a.asm.spine_bone_get_d).apply(null,arguments)};
+a._spine_bone_set_d=function(){return(a._spine_bone_set_d=a.asm.spine_bone_set_d).apply(null,arguments)};a._spine_bone_get_world_x=function(){return(a._spine_bone_get_world_x=a.asm.spine_bone_get_world_x).apply(null,arguments)};a._spine_bone_set_world_x=function(){return(a._spine_bone_set_world_x=a.asm.spine_bone_set_world_x).apply(null,arguments)};a._spine_bone_get_world_y=function(){return(a._spine_bone_get_world_y=a.asm.spine_bone_get_world_y).apply(null,arguments)};
+a._spine_bone_set_world_y=function(){return(a._spine_bone_set_world_y=a.asm.spine_bone_set_world_y).apply(null,arguments)};a._spine_bone_get_world_rotation_x=function(){return(a._spine_bone_get_world_rotation_x=a.asm.spine_bone_get_world_rotation_x).apply(null,arguments)};a._spine_bone_get_world_rotation_y=function(){return(a._spine_bone_get_world_rotation_y=a.asm.spine_bone_get_world_rotation_y).apply(null,arguments)};
+a._spine_bone_get_world_scale_x=function(){return(a._spine_bone_get_world_scale_x=a.asm.spine_bone_get_world_scale_x).apply(null,arguments)};a._spine_bone_get_world_scale_y=function(){return(a._spine_bone_get_world_scale_y=a.asm.spine_bone_get_world_scale_y).apply(null,arguments)};a._spine_bone_get_is_active=function(){return(a._spine_bone_get_is_active=a.asm.spine_bone_get_is_active).apply(null,arguments)};
+a._spine_bone_set_is_active=function(){return(a._spine_bone_set_is_active=a.asm.spine_bone_set_is_active).apply(null,arguments)};a._spine_attachment_get_name=function(){return(a._spine_attachment_get_name=a.asm.spine_attachment_get_name).apply(null,arguments)};a._spine_attachment_get_type=function(){return(a._spine_attachment_get_type=a.asm.spine_attachment_get_type).apply(null,arguments)};
+a._spine_attachment_copy=function(){return(a._spine_attachment_copy=a.asm.spine_attachment_copy).apply(null,arguments)};a._spine_attachment_dispose=function(){return(a._spine_attachment_dispose=a.asm.spine_attachment_dispose).apply(null,arguments)};a._spine_point_attachment_compute_world_position=function(){return(a._spine_point_attachment_compute_world_position=a.asm.spine_point_attachment_compute_world_position).apply(null,arguments)};
 a._spine_point_attachment_compute_world_rotation=function(){return(a._spine_point_attachment_compute_world_rotation=a.asm.spine_point_attachment_compute_world_rotation).apply(null,arguments)};a._spine_point_attachment_get_x=function(){return(a._spine_point_attachment_get_x=a.asm.spine_point_attachment_get_x).apply(null,arguments)};a._spine_point_attachment_set_x=function(){return(a._spine_point_attachment_set_x=a.asm.spine_point_attachment_set_x).apply(null,arguments)};
 a._spine_point_attachment_get_y=function(){return(a._spine_point_attachment_get_y=a.asm.spine_point_attachment_get_y).apply(null,arguments)};a._spine_point_attachment_set_y=function(){return(a._spine_point_attachment_set_y=a.asm.spine_point_attachment_set_y).apply(null,arguments)};a._spine_point_attachment_get_rotation=function(){return(a._spine_point_attachment_get_rotation=a.asm.spine_point_attachment_get_rotation).apply(null,arguments)};
 a._spine_point_attachment_set_rotation=function(){return(a._spine_point_attachment_set_rotation=a.asm.spine_point_attachment_set_rotation).apply(null,arguments)};a._spine_point_attachment_get_color=function(){return(a._spine_point_attachment_get_color=a.asm.spine_point_attachment_get_color).apply(null,arguments)};a._spine_point_attachment_set_color=function(){return(a._spine_point_attachment_set_color=a.asm.spine_point_attachment_set_color).apply(null,arguments)};

spine-flutter/lib/spine_widget.dart

@@ -78,9 +78,9 @@ class SpineWidgetController {
       {this.onInitialized, this.onBeforeUpdateWorldTransforms, this.onAfterUpdateWorldTransforms, this.onBeforePaint, this.onAfterPaint});
 
   void _initialize(SkeletonDrawable drawable) {
-    if (_drawable != null) throw Exception("SpineWidgetController already initialized. A controller can only be used with one widget.");
+    var wasInitialized = _drawable != null;
     _drawable = drawable;
-    onInitialized?.call(this);
+    if (!wasInitialized) onInitialized?.call(this);
   }
 
   /// The [Atlas] from which images to render the skeleton are sourced.
@@ -283,14 +283,15 @@ class SpineWidget extends StatefulWidget {
   ///
   /// The widget can optionally by sized by the bounds provided by the [BoundsProvider] by passing `true` for [sizedByBounds].
   SpineWidget.fromAsset(this._atlasFile, this._skeletonFile, this._controller,
-      {AssetBundle? bundle, BoxFit? fit, Alignment? alignment, BoundsProvider? boundsProvider, bool? sizedByBounds, super.key})
+      {AssetBundle? bundle, BoxFit? fit, Alignment? alignment, BoundsProvider? boundsProvider, bool? sizedByBounds, Key? key})
       : _assetType = _AssetType.asset,
         _fit = fit ?? BoxFit.contain,
         _alignment = alignment ?? Alignment.center,
         _boundsProvider = boundsProvider ?? const SetupPoseBounds(),
         _sizedByBounds = sizedByBounds ?? false,
         _drawable = null,
-        _bundle = bundle ?? rootBundle;
+        _bundle = bundle ?? rootBundle,
+        super(key: key);
 
   /// Constructs a new [SpineWidget] from files. The [_atlasFile] specifies the `.atlas` file to be loaded for the images used to render
   /// the skeleton. The [_skeletonFile] specifies either a Skeleton `.json` or `.skel` file containing the skeleton data.
@@ -304,14 +305,15 @@ class SpineWidget extends StatefulWidget {
   ///
   /// The widget can optionally by sized by the bounds provided by the [BoundsProvider] by passing `true` for [sizedByBounds].
   const SpineWidget.fromFile(this._atlasFile, this._skeletonFile, this._controller,
-      {BoxFit? fit, Alignment? alignment, BoundsProvider? boundsProvider, bool? sizedByBounds, super.key})
+      {BoxFit? fit, Alignment? alignment, BoundsProvider? boundsProvider, bool? sizedByBounds, Key? key})
       : _assetType = _AssetType.file,
         _bundle = null,
         _fit = fit ?? BoxFit.contain,
         _alignment = alignment ?? Alignment.center,
         _boundsProvider = boundsProvider ?? const SetupPoseBounds(),
         _sizedByBounds = sizedByBounds ?? false,
-        _drawable = null;
+        _drawable = null,
+        super(key: key);
 
   /// Constructs a new [SpineWidget] from HTTP URLs. The [_atlasFile] specifies the `.atlas` file to be loaded for the images used to render
   /// the skeleton. The [_skeletonFile] specifies either a Skeleton `.json` or `.skel` file containing the skeleton data.
@@ -325,14 +327,15 @@ class SpineWidget extends StatefulWidget {
   ///
   /// The widget can optionally by sized by the bounds provided by the [BoundsProvider] by passing `true` for [sizedByBounds].
   const SpineWidget.fromHttp(this._atlasFile, this._skeletonFile, this._controller,
-      {BoxFit? fit, Alignment? alignment, BoundsProvider? boundsProvider, bool? sizedByBounds, super.key})
+      {BoxFit? fit, Alignment? alignment, BoundsProvider? boundsProvider, bool? sizedByBounds, Key? key})
       : _assetType = _AssetType.http,
         _bundle = null,
         _fit = fit ?? BoxFit.contain,
         _alignment = alignment ?? Alignment.center,
         _boundsProvider = boundsProvider ?? const SetupPoseBounds(),
         _sizedByBounds = sizedByBounds ?? false,
-        _drawable = null;
+        _drawable = null,
+        super(key: key);
 
   /// Constructs a new [SpineWidget] from a [SkeletonDrawable].
   ///
@@ -345,7 +348,7 @@ class SpineWidget extends StatefulWidget {
   ///
   /// The widget can optionally by sized by the bounds provided by the [BoundsProvider] by passing `true` for [sizedByBounds].
   const SpineWidget.fromDrawable(this._drawable, this._controller,
-      {BoxFit? fit, Alignment? alignment, BoundsProvider? boundsProvider, bool? sizedByBounds, super.key})
+      {BoxFit? fit, Alignment? alignment, BoundsProvider? boundsProvider, bool? sizedByBounds, Key? key})
       : _assetType = _AssetType.drawable,
         _bundle = null,
         _fit = fit ?? BoxFit.contain,
@@ -353,7 +356,8 @@ class SpineWidget extends StatefulWidget {
         _boundsProvider = boundsProvider ?? const SetupPoseBounds(),
         _sizedByBounds = sizedByBounds ?? false,
         _skeletonFile = null,
-        _atlasFile = null;
+        _atlasFile = null,
+        super(key: key);
 
   @override
   State<SpineWidget> createState() => _SpineWidgetState();
@@ -376,12 +380,31 @@ class _SpineWidgetState extends State<SpineWidget> {
   @override
   void didUpdateWidget(covariant SpineWidget oldWidget) {
     super.didUpdateWidget(oldWidget);
-    widget._controller._drawable?.dispose();
-    _drawable = null;
-    if (widget._assetType == _AssetType.drawable) {
-      loadDrawable(widget._drawable!);
-    } else {
-      loadFromAsset(widget._bundle, widget._atlasFile!, widget._skeletonFile!, widget._assetType);
+
+    // Check if the skeleton/atlas data has changed. Only re-create
+    // everything if it has, otherwise, keep using what's already been
+    // loaded.
+    bool hasChanged = true;
+    if (oldWidget._assetType == widget._assetType) {
+      if (oldWidget._assetType == _AssetType.drawable &&
+          oldWidget._drawable == widget._drawable) {
+        hasChanged = false;
+      } else if (oldWidget._skeletonFile == widget._skeletonFile &&
+          oldWidget._atlasFile == widget._atlasFile &&
+          oldWidget._controller == widget._controller &&
+          oldWidget._bundle == widget._bundle) {
+        hasChanged = false;
+      }
+    }
+
+    if (hasChanged) {
+      widget._controller._drawable?.dispose();
+      _drawable = null;
+      if (widget._assetType == _AssetType.drawable) {
+        loadDrawable(widget._drawable!);
+      } else {
+        loadFromAsset(widget._bundle, widget._atlasFile!, widget._skeletonFile!, widget._assetType);
+      }
     }
   }