flutter: A floating window is now shown

src/flutter/dart/lib/DropArea_flutter.dart

@@ -20,6 +20,7 @@ class DropArea_flutter extends View_flutter {
       {int windowFlags = 0})
       : super(controller, type, parent, windowFlags: windowFlags) {
     print("DropArea_flutter CTOR");
+    m_fillsParent = true;
   }
 
   Widget createFlutterWidget() {

src/flutter/dart/lib/FloatingWindow_flutter.dart

@@ -13,18 +13,35 @@ import 'package:KDDockWidgets/PositionedWidget.dart';
 import 'package:KDDockWidgets/View_mixin.dart';
 import 'package:KDDockWidgetsBindings/Bindings.dart' as KDDockWidgetBindings;
 import 'package:flutter/material.dart';
+import 'TitleBar_flutter.dart';
+import 'DropArea_flutter.dart';
 
 class FloatingWindow_flutter extends KDDockWidgetBindings.View_flutter
     with View_mixin {
+  late final KDDockWidgetBindings.FloatingWindow m_controller;
+
   FloatingWindow_flutter(KDDockWidgetBindings.Controller? controller,
       KDDockWidgetBindings.View? parent, {int windowFlags = 0})
       : super(controller,
             KDDockWidgetBindings.KDDockWidgets_Type.FloatingWindow, parent,
             windowFlags: windowFlags) {
+    m_controller = controller! as KDDockWidgetBindings.FloatingWindow;
+    m_fillsParent = true;
+
     initMixin(this, color: Colors.black12, debugName: "FloatingWindow");
     print("FloatingWindow_flutter CTOR");
   }
 
+  TitleBar_flutter titleBarView() {
+    return KDDockWidgetBindings.View_flutter.fromCache(
+        m_controller.titleBar().view().thisCpp) as TitleBar_flutter;
+  }
+
+  DropArea_flutter dropAreaView() {
+    return KDDockWidgetBindings.View_flutter.fromCache(
+        m_controller.dropArea().view().thisCpp) as DropArea_flutter;
+  }
+
   Widget createFlutterWidget() {
     return FloatingWindowWidget(kddwView, this, key: widgetKey);
   }
@@ -49,6 +66,9 @@ class FloatingWindowPositionedWidgetState extends PositionedWidgetState {
 
   @override
   Widget buildContents() {
-    return super.buildContents();
+    final titleBarWidget = view.titleBarView().flutterWidget;
+    final dropAreaWidget = view.dropAreaView().flutterWidget;
+
+    return Column(children: [titleBarWidget, Expanded(child: dropAreaWidget)]);
   }
 }

src/flutter/dart/lib/Platform_flutter.dart

@@ -18,11 +18,20 @@ import 'ViewFactory_flutter.dart';
 class Platform_flutter extends KDDockWidgetBindings.Platform_flutter {
   late final WindowOverlayWidget windowOverlayWidget;
 
+  var floatingWindows = <KDDockWidgetBindings.FloatingWindow>[];
+
   @override
   String name() {
     return "flutter";
   }
 
+  static Platform_flutter plat() {
+    var p = KDDockWidgetBindings.Platform_flutter.platformFlutter();
+
+    return KDDockWidgetBindings.Platform_flutter.fromCache(p.thisCpp)
+        as Platform_flutter;
+  }
+
   @override
   KDDockWidgetBindings.ViewFactory createDefaultViewFactory() {
     return ViewFactory_flutter();
@@ -45,11 +54,13 @@ class Platform_flutter extends KDDockWidgetBindings.Platform_flutter {
 
   @override
   onFloatingWindowCreated(KDDockWidgetBindings.FloatingWindow? fw) {
+    floatingWindows.add(fw!);
     rebuildWindowOverlay();
   }
 
   @override
   onFloatingWindowDestroyed(KDDockWidgetBindings.FloatingWindow? fw) {
+    floatingWindows.remove(fw!);
     rebuildWindowOverlay();
   }
 

src/flutter/dart/lib/WindowOverlayWidget.dart

@@ -9,8 +9,10 @@
   Contact KDAB at <info@kdab.com> for commercial licensing options.
 */
 
+import 'package:KDDockWidgets/WindowWidget.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter/widgets.dart';
+import 'package:KDDockWidgets/Platform_flutter.dart';
 
 /// @brief A Widget to host KDDW floating windows
 /// Since Flutter doesn't support real OS level multi-windows we need
@@ -32,10 +34,17 @@ class WindowOverlayWidget extends StatefulWidget {
 class WindowOverlayWidgetState extends State<WindowOverlayWidget> {
   @override
   Widget build(BuildContext context) {
-    return Stack(children: []);
+    final floatingWindows = Platform_flutter.plat().floatingWindows;
+    List<Widget> windowWidgets = [];
+    for (var fw in floatingWindows) {
+      windowWidgets.add(WindowWidget(fw));
+    }
+
+    return Stack(children: windowWidgets);
   }
 
   onFloatingWindowCountChanged() {
     print("onFloatingWindowCountChanged!");
+    setState(() {});
   }
 }

src/flutter/dart/lib/WindowWidget.dart

@@ -12,13 +12,18 @@
 import 'package:flutter/material.dart';
 import 'package:flutter/widgets.dart';
 import 'package:KDDockWidgets/FloatingWindow_flutter.dart' as KDDW;
+import 'package:KDDockWidgetsBindings/Bindings.dart' as KDDWBindings;
 
 /// @brief A Widget that hosts a single KDDW FloatingWindow
 /// Since Flutter doesn't support real OS level multi-windows we need
 /// to draw the windows ourselves
 class WindowWidget extends StatefulWidget {
   late final KDDW.FloatingWindow_flutter kddwFloatingWindowView;
-  WindowWidget(this.kddwFloatingWindowView);
+  WindowWidget(KDDWBindings.FloatingWindow fw) {
+    kddwFloatingWindowView =
+        KDDWBindings.View_flutter.fromCache(fw.view().thisCpp)
+            as KDDW.FloatingWindow_flutter;
+  }
 
   @override
   State<StatefulWidget> createState() {
@@ -32,10 +37,10 @@ class WindowWidgetState extends State<WindowWidget> {
 
   @override
   Widget build(BuildContext context) {
-    final x = kddwFloatingWindowView.x();
-    final y = kddwFloatingWindowView.y();
-    final width = kddwFloatingWindowView.width();
-    final height = kddwFloatingWindowView.height();
+    final x = kddwFloatingWindowView.m_x;
+    final y = kddwFloatingWindowView.m_y;
+    final width = kddwFloatingWindowView.m_width;
+    final height = kddwFloatingWindowView.m_height;
 
     return Positioned(
         left: x.toDouble(),