flutter: Add FloatingWidget

src/flutter/dart/lib/models/FloatingItem.dart

@@ -30,6 +30,10 @@ class FloatingItem implements ItemWithTitleBar {
     }
   }
 
+  bool showsTitleBar() {
+    return dropArea.groups.length > 1;
+  }
+
   @override
   void close() {
     _groupCountChangedConnection.disconnect();

src/flutter/dart/lib/widgets/FloatingWidget.dart

@@ -0,0 +1,52 @@
+/*
+  This file is part of KDDockWidgets.
+
+  SPDX-FileCopyrightText: 2024 Klarälvdalens Datakonsult AB, a KDAB Group company <[email protected]>
+  Author: Sérgio Martins <[email protected]>
+
+  SPDX-License-Identifier: GPL-2.0-only OR GPL-3.0-only
+
+  Contact KDAB at <[email protected]> for commercial licensing options.
+*/
+
+import 'package:KDDockWidgets/KDDockWidgets.dart';
+import 'package:KDDockWidgets/widgets/DropAreaWidget.dart';
+import 'package:KDDockWidgets/widgets/PositionedWidget.dart';
+import 'package:KDDockWidgets/widgets/TabBarWidget.dart';
+import 'package:KDDockWidgets/widgets/TitleBarWidget.dart';
+import 'package:KDDockWidgets/widgets/DockWidget.dart';
+
+import 'package:flutter/material.dart';
+
+class FloatingWidget extends StatefulWidget {
+  final FloatingItem floatingItem;
+  FloatingWidget(this.floatingItem, {Key? key}) : super(key: key);
+
+  @override
+  State<FloatingWidget> createState() {
+    return FloatingWidgetState(floatingItem);
+  }
+}
+
+class FloatingWidgetState extends State<FloatingWidget> {
+  final FloatingItem floatingItem;
+  FloatingWidgetState(this.floatingItem) {}
+
+  Widget buildContents(BuildContext ctx) {
+    final titleBarWidget = TitleBarWidget(floatingItem.titleBar);
+    final dropAreaWidget = DropAreaWidget(floatingItem.dropArea);
+
+    return Column(
+      crossAxisAlignment: CrossAxisAlignment.stretch,
+      children: [
+        if (floatingItem.showsTitleBar()) titleBarWidget,
+        Expanded(child: dropAreaWidget)
+      ],
+    );
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return buildContents(context);
+  }
+}