Once more...

Author: deakjahn

flutter_dropzone_web/lib/flutter_dropzone_plugin.dart

@@ -9,6 +9,7 @@ import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
 import 'package:flutter_dropzone_platform_interface/flutter_dropzone_platform_interface.dart';
 import 'package:flutter_dropzone_web/flutter_dropzone_web.dart';
+import 'package:flutter_dropzone_web/html_element_view.dart';
 import 'package:flutter_web_plugins/flutter_web_plugins.dart';
 
 class FlutterDropzonePlugin extends FlutterDropzonePlatform {
@@ -96,7 +97,7 @@ class FlutterDropzonePlugin extends FlutterDropzonePlatform {
         future: _isReady,
         builder: (context, snapshot) {
           if (snapshot.hasData) {
-            return HtmlElementView(
+            return HtmlElementViewEx(
               viewType: 'com.creativephotocloud.plugins/dropzone',
               onPlatformViewCreated: onPlatformViewCreated,
             );

flutter_dropzone_web/lib/html_element_view.dart

@@ -0,0 +1,59 @@
+import 'package:flutter/foundation.dart';
+import 'package:flutter/gestures.dart';
+import 'package:flutter/material.dart';
+import 'package:flutter/rendering.dart';
+import 'package:flutter/services.dart';
+
+// https://github.com/flutter/flutter/issues/56181
+
+class HtmlElementViewEx extends HtmlElementView {
+  final PlatformViewCreatedCallback onPlatformViewCreated; //!!!
+  final dynamic creationParams;
+
+  const HtmlElementViewEx({Key? key, required String viewType, required this.onPlatformViewCreated, this.creationParams}) : super(key: key, viewType: viewType);
+
+  @override
+  Widget build(BuildContext context) => PlatformViewLink(
+        viewType: viewType,
+        onCreatePlatformView: _createHtmlElementView,
+        surfaceFactory: (BuildContext context, PlatformViewController controller) => PlatformViewSurface(
+          controller: controller,
+          gestureRecognizers: const <Factory<OneSequenceGestureRecognizer>>{},
+          hitTestBehavior: PlatformViewHitTestBehavior.opaque,
+        ),
+      );
+
+  _HtmlElementViewControllerEx _createHtmlElementView(PlatformViewCreationParams params) {
+    final _HtmlElementViewControllerEx controller = _HtmlElementViewControllerEx(params.id, viewType);
+    controller._initialize().then((_) {
+      params.onPlatformViewCreated(params.id);
+      onPlatformViewCreated(params.id); //!!!
+    });
+    return controller;
+  }
+}
+
+class _HtmlElementViewControllerEx extends PlatformViewController {
+  @override
+  final int viewId;
+  final String viewType;
+  bool _initialized = false;
+
+  _HtmlElementViewControllerEx(this.viewId, this.viewType);
+
+  Future<void> _initialize() async {
+    await SystemChannels.platform_views.invokeMethod<void>('create', {'id': viewId, 'viewType': viewType});
+    _initialized = true;
+  }
+
+  @override
+  Future<void> clearFocus() async {}
+
+  @override
+  Future<void> dispatchPointerEvent(PointerEvent event) async {}
+
+  @override
+  Future<void> dispose() async {
+    if (_initialized) await SystemChannels.platform_views.invokeMethod<void>('dispose', viewId);
+  }
+}

flutter_dropzone_web/pubspec.yaml

@@ -1,6 +1,6 @@
 name: flutter_dropzone_web
 description: A drag-and-drop Flutter plugin (Web only).
-version: 2.1.0
+version: 2.1.1
 homepage: https://github.com/deakjahn/flutter_dropzone
 
 environment: