Add Platform_qt, a baseclass for both Qt frontends

So we can share some code between QtQuick and QtWidgets

src/CMakeLists.txt

@@ -106,6 +106,8 @@ set(DOCKSLIBS_SRCS
     Controller.h
     Platform.cpp
     Platform.h
+    qtcommon/Platform_qt.cpp
+    qtcommon/Platform_qt.h
     qtwidgets/Platform_qtwidgets.cpp
     qtwidgets/Platform_qtwidgets.h
     qtwidgets/views/View_qtwidgets.cpp

src/qtcommon/Platform_qt.cpp

@@ -0,0 +1,30 @@
+/*
+  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 "Platform_qt.h"
+
+#include <QGuiApplication>
+
+using namespace KDDockWidgets;
+
+
+Platform_qt::Platform_qt()
+{
+}
+
+Platform_qt::~Platform_qt()
+{
+}
+
+std::shared_ptr<ViewWrapper> Platform_qt::focusedView() const
+{
+    return qobjectAsView(qApp->focusObject());
+}

src/qtcommon/Platform_qt.h

@@ -0,0 +1,30 @@
+/*
+  This file is part of KDDockWidgets.
+
+  SPDX-FileCopyrightText: 2020-2022 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.
+*/
+
+#pragma once
+
+#include "docks_export.h"
+#include "Platform.h"
+
+namespace KDDockWidgets {
+
+/// @brief Baseclass platform for Qt based platform
+/// Useful since QtWidgets and QtQuick share some similarities
+class DOCKS_EXPORT Platform_qt : public Platform
+{
+public:
+    Platform_qt();
+    ~Platform_qt() override;
+
+    std::shared_ptr<ViewWrapper> focusedView() const override;
+};
+
+}

src/qtquick/Platform_qtquick.cpp

@@ -52,11 +52,6 @@ const char *Platform_qtquick::name() const
     return "qtquick";
 }
 
-std::shared_ptr<ViewWrapper> Platform_qtquick::focusedView() const
-{
-    return qobjectAsView(qApp->focusObject());
-}
-
 std::shared_ptr<ViewWrapper> Platform_qtquick::qobjectAsView(QObject *obj) const
 {
     if (auto w = qobject_cast<QQuickItem *>(obj)) {

src/qtquick/Platform_qtquick.h

@@ -11,19 +11,18 @@
 
 #pragma once
 
-#include "Platform.h"
+#include "qtcommon/Platform_qt.h"
 
 namespace KDDockWidgets {
 
 /// @brief implements functions specific to a particular platform
 /// A platform can be for example qtwidgets, qtquick, etc.
-class DOCKS_EXPORT Platform_qtquick : public Platform
+class DOCKS_EXPORT Platform_qtquick : public Platform_qt
 {
 public:
     Platform_qtquick();
     ~Platform_qtquick() override;
     const char *name() const override;
-    std::shared_ptr<ViewWrapper> focusedView() const override;
     std::shared_ptr<ViewWrapper> qobjectAsView(QObject *) const override;
 
 private:

src/qtwidgets/Platform_qtwidgets.cpp

@@ -61,11 +61,6 @@ bool Platform_qtwidgets::hasActivePopup() const
     return qApp->activePopupWidget() != nullptr;
 }
 
-std::shared_ptr<ViewWrapper> Platform_qtwidgets::focusedView() const
-{
-    return qobjectAsView(qApp->focusObject());
-}
-
 std::shared_ptr<ViewWrapper> Platform_qtwidgets::qobjectAsView(QObject *obj) const
 {
     if (auto w = qobject_cast<QWidget *>(obj)) {

src/qtwidgets/Platform_qtwidgets.h

@@ -11,21 +11,20 @@
 
 #pragma once
 
-#include "Platform.h"
+#include "qtcommon/Platform_qt.h"
 #include "qtwidgets/DebugWindow_p.h"
 
 namespace KDDockWidgets {
 
 /// @brief implements functions specific to a particular platform
 /// A platform can be for example qtwidgets, qtquick, etc.
-class DOCKS_EXPORT Platform_qtwidgets : public Platform
+class DOCKS_EXPORT Platform_qtwidgets : public Platform_qt
 {
 public:
     Platform_qtwidgets();
     ~Platform_qtwidgets() override;
     const char *name() const override;
     bool hasActivePopup() const override;
-    std::shared_ptr<ViewWrapper> focusedView() const override;
     std::shared_ptr<ViewWrapper> qobjectAsView(QObject *) const override;
 
 private: