flutter: Initial boiler-plate commit

Does not have any implementation.
But we can start generating dart bindings for it.

src/flutter/ViewFactory_flutter.cpp

@@ -0,0 +1,133 @@
+/*
+  This file is part of KDDockWidgets.
+
+  SPDX-FileCopyrightText: 2019-2022 Klarälvdalens Datakonsult AB, a KDAB Group company <info@kdab.com>
+  Author: Sérgio Martins <sergio.martins@kdab.com>
+
+  SPDX-License-Identifier: GPL-2.0-only OR GPL-3.0-only
+
+  Contact KDAB at <info@kdab.com> for commercial licensing options.
+*/
+
+#include "ViewFactory_flutter.h"
+#include "Config.h"
+
+#include "private/Utils_p.h"
+
+#include "kddockwidgets/controllers/TabBar.h"
+#include "kddockwidgets/controllers/Stack.h"
+#include "kddockwidgets/controllers/FloatingWindow.h"
+#include "kddockwidgets/controllers/indicators/ClassicIndicators.h"
+#include "kddockwidgets/controllers/indicators/NullIndicators.h"
+#include "kddockwidgets/controllers/indicators/SegmentedIndicators.h"
+#include "kddockwidgets/controllers/MainWindow.h"
+
+// #include "qtwidgets/views/ClassicIndicatorsWindow_qtwidgets.h"
+// #include "qtwidgets/views/SegmentedIndicatorsOverlay_qtwidgets.h"
+// #include "qtwidgets/views/FloatingWindow_qtwidgets.h"
+// #include "qtwidgets/views/DockWidget_qtwidgets.h"
+// #include "qtwidgets/views/DropArea_qtwidgets.h"
+// #include "qtwidgets/views/Group_qtwidgets.h"
+// #include "qtwidgets/views/View_qtwidgets.h"
+// #include "qtwidgets/views/Separator_qtwidgets.h"
+// #include "qtwidgets/views/TitleBar_qtwidgets.h"
+// #include "qtwidgets/views/TabBar_qtwidgets.h"
+// #include "qtwidgets/views/SideBar_qtwidgets.h"
+// #include "qtwidgets/views/Stack_qtwidgets.h"
+// #include "qtwidgets/views/MainWindow_qtwidgets.h"
+// #include "qtwidgets/views/MDILayout_qtwidgets.h"
+// #include "qtwidgets/views/RubberBand_qtwidgets.h"
+
+#include "views/ClassicIndicatorWindowViewInterface.h"
+
+
+// clazy:excludeall=ctor-missing-parent-argument
+
+using namespace KDDockWidgets;
+
+
+ViewFactory_flutter::~ViewFactory_flutter()
+{
+}
+
+View *ViewFactory_flutter::createDockWidget(const QString &,
+                                            DockWidgetOptions,
+                                            LayoutSaverOptions,
+                                            Qt::WindowFlags) const
+{
+    return {};
+}
+
+
+View *ViewFactory_flutter::createGroup(Controllers::Group *, View * = nullptr) const
+{
+    return {};
+}
+
+View *ViewFactory_flutter::createTitleBar(Controllers::TitleBar *, View *) const
+{
+    return {};
+}
+
+View *ViewFactory_flutter::createTabBar(Controllers::TabBar *, View *) const
+{
+    return {};
+}
+
+View *ViewFactory_flutter::createStack(Controllers::Stack *, View *) const
+{
+    return {};
+}
+
+View *ViewFactory_flutter::createSeparator(Controllers::Separator *, View *) const
+{
+    return {};
+}
+
+View *ViewFactory_flutter::createFloatingWindow(Controllers::FloatingWindow *,
+                                                Controllers::MainWindow *, Qt::WindowFlags) const
+{
+    return {};
+}
+
+View *ViewFactory_flutter::createRubberBand(View *) const
+{
+    return nullptr;
+}
+
+View *ViewFactory_flutter::createSideBar(Controllers::SideBar *,
+                                         View *) const
+{
+    return {};
+}
+
+QAbstractButton *ViewFactory_flutter::createTitleBarButton(QWidget *, TitleBarButtonType) const
+{
+    return nullptr;
+}
+
+// iconForButtonType impl is the same for QtQuick and QtWidgets
+QIcon ViewFactory_flutter::iconForButtonType(TitleBarButtonType, qreal) const
+{
+    return {};
+}
+
+View *ViewFactory_flutter::createDropArea(Controllers::DropArea *, View *) const
+{
+    return {};
+}
+
+View *ViewFactory_flutter::createMDILayout(Controllers::MDILayout *, View *) const
+{
+    return {};
+}
+
+View *ViewFactory_flutter::createSegmentedDropIndicatorOverlayView(Controllers::SegmentedIndicators *, View *) const
+{
+    return {};
+}
+
+Views::ClassicIndicatorWindowViewInterface *ViewFactory_flutter::createClassicIndicatorWindow(Controllers::ClassicIndicators *) const
+{
+    return {};
+}