QmlDesigner: Split messaging and process for puppets

This will make it easier to implement custom puppets. The new connection
manager will restucture the code and it add a mechanism to capture data
too.

Task-number: QDS-2529
Change-Id: I5d15c3303ef1c9a3e25ba197d350e0d561ce813a
Reviewed-by: Thomas Hartmann <thomas.hartmann@qt.io>

8 files changed, 229 insertions, 69 deletions

diff --git a/share/qtcreator/qml/qmlpuppet/qml2puppet/instances/instances.pri b/share/qtcreator/qml/qmlpuppet/qml2puppet/instances/instances.pri
index 4fe46e29d83..ce9bb2376e7 100644
--- a/share/qtcreator/qml/qmlpuppet/qml2puppet/instances/instances.pri
+++ b/share/qtcreator/qml/qmlpuppet/qml2puppet/instances/instances.pri
@@ -5,52 +5,54 @@ versionAtLeast(QT_VERSION, 5.15.0):qtHaveModule(quick3d) {
     DEFINES *= QUICK3D_MODULE
 }
 
-HEADERS += $$PWD/qt5nodeinstanceserver.h
-HEADERS += $$PWD/qt5testnodeinstanceserver.h
-HEADERS += $$PWD/qt5informationnodeinstanceserver.h
-HEADERS += $$PWD/qt5rendernodeinstanceserver.h
-HEADERS += $$PWD/qt5previewnodeinstanceserver.h
-HEADERS += $$PWD/qt5nodeinstanceclientproxy.h
-HEADERS += $$PWD/quickitemnodeinstance.h
-HEADERS += $$PWD/behaviornodeinstance.h
-HEADERS += $$PWD/dummycontextobject.h
-HEADERS += $$PWD/childrenchangeeventfilter.h
-HEADERS += $$PWD/componentnodeinstance.h
-HEADERS += $$PWD/dummynodeinstance.h
-HEADERS += $$PWD/nodeinstanceserver.h
-HEADERS += $$PWD/nodeinstancesignalspy.h
-HEADERS += $$PWD/objectnodeinstance.h
-HEADERS += $$PWD/qmlpropertychangesnodeinstance.h
-HEADERS += $$PWD/qmlstatenodeinstance.h
-HEADERS += $$PWD/qmltransitionnodeinstance.h
-HEADERS += $$PWD/servernodeinstance.h
-HEADERS += $$PWD/anchorchangesnodeinstance.h
-HEADERS += $$PWD/positionernodeinstance.h
-HEADERS += $$PWD/layoutnodeinstance.h
-HEADERS += $$PWD/qt3dpresentationnodeinstance.h
-HEADERS += $$PWD/quick3dnodeinstance.h
+HEADERS += $$PWD/qt5nodeinstanceserver.h \
+    $$PWD/qt5capturenodeinstanceserver.h \
+    $$PWD/qt5testnodeinstanceserver.h \
+    $$PWD/qt5informationnodeinstanceserver.h \
+    $$PWD/qt5rendernodeinstanceserver.h \
+    $$PWD/qt5previewnodeinstanceserver.h \
+    $$PWD/qt5nodeinstanceclientproxy.h \
+    $$PWD/quickitemnodeinstance.h \
+    $$PWD/behaviornodeinstance.h \
+    $$PWD/dummycontextobject.h \
+    $$PWD/childrenchangeeventfilter.h \
+    $$PWD/componentnodeinstance.h \
+    $$PWD/dummynodeinstance.h \
+    $$PWD/nodeinstanceserver.h \
+    $$PWD/nodeinstancesignalspy.h \
+    $$PWD/objectnodeinstance.h \
+    $$PWD/qmlpropertychangesnodeinstance.h \
+    $$PWD/qmlstatenodeinstance.h \
+    $$PWD/qmltransitionnodeinstance.h \
+    $$PWD/servernodeinstance.h \
+    $$PWD/anchorchangesnodeinstance.h \
+    $$PWD/positionernodeinstance.h \
+    $$PWD/layoutnodeinstance.h \
+    $$PWD/qt3dpresentationnodeinstance.h \
+    $$PWD/quick3dnodeinstance.h
 
-SOURCES += $$PWD/qt5nodeinstanceserver.cpp
-SOURCES += $$PWD/qt5testnodeinstanceserver.cpp
-SOURCES += $$PWD/qt5informationnodeinstanceserver.cpp
-SOURCES += $$PWD/qt5rendernodeinstanceserver.cpp
-SOURCES += $$PWD/qt5previewnodeinstanceserver.cpp
-SOURCES += $$PWD/qt5nodeinstanceclientproxy.cpp
-SOURCES += $$PWD/quickitemnodeinstance.cpp
-SOURCES += $$PWD/behaviornodeinstance.cpp
-SOURCES += $$PWD/dummycontextobject.cpp
-SOURCES += $$PWD/childrenchangeeventfilter.cpp
-SOURCES += $$PWD/componentnodeinstance.cpp
-SOURCES += $$PWD/dummynodeinstance.cpp
-SOURCES += $$PWD/nodeinstanceserver.cpp
-SOURCES += $$PWD/nodeinstancesignalspy.cpp
-SOURCES += $$PWD/objectnodeinstance.cpp
-SOURCES += $$PWD/qmlpropertychangesnodeinstance.cpp
-SOURCES += $$PWD/qmlstatenodeinstance.cpp
-SOURCES += $$PWD/qmltransitionnodeinstance.cpp
-SOURCES += $$PWD/servernodeinstance.cpp
-SOURCES += $$PWD/anchorchangesnodeinstance.cpp
-SOURCES += $$PWD/positionernodeinstance.cpp
-SOURCES += $$PWD/layoutnodeinstance.cpp
-SOURCES += $$PWD/qt3dpresentationnodeinstance.cpp
-SOURCES += $$PWD/quick3dnodeinstance.cpp
+SOURCES += $$PWD/qt5nodeinstanceserver.cpp \
+    $$PWD/qt5capturenodeinstanceserver.cpp \
+    $$PWD/qt5testnodeinstanceserver.cpp \
+    $$PWD/qt5informationnodeinstanceserver.cpp \
+    $$PWD/qt5rendernodeinstanceserver.cpp \
+    $$PWD/qt5previewnodeinstanceserver.cpp \
+    $$PWD/qt5nodeinstanceclientproxy.cpp \
+    $$PWD/quickitemnodeinstance.cpp \
+    $$PWD/behaviornodeinstance.cpp \
+    $$PWD/dummycontextobject.cpp \
+    $$PWD/childrenchangeeventfilter.cpp \
+    $$PWD/componentnodeinstance.cpp \
+    $$PWD/dummynodeinstance.cpp \
+    $$PWD/nodeinstanceserver.cpp \
+    $$PWD/nodeinstancesignalspy.cpp \
+    $$PWD/objectnodeinstance.cpp \
+    $$PWD/qmlpropertychangesnodeinstance.cpp \
+    $$PWD/qmlstatenodeinstance.cpp \
+    $$PWD/qmltransitionnodeinstance.cpp \
+    $$PWD/servernodeinstance.cpp \
+    $$PWD/anchorchangesnodeinstance.cpp \
+    $$PWD/positionernodeinstance.cpp \
+    $$PWD/layoutnodeinstance.cpp \
+    $$PWD/qt3dpresentationnodeinstance.cpp \
+    $$PWD/quick3dnodeinstance.cpp
diff --git a/share/qtcreator/qml/qmlpuppet/qml2puppet/instances/nodeinstanceserver.cpp b/share/qtcreator/qml/qmlpuppet/qml2puppet/instances/nodeinstanceserver.cpp
index 9b0b59d58bb..1abfc634bd2 100644
--- a/share/qtcreator/qml/qmlpuppet/qml2puppet/instances/nodeinstanceserver.cpp
+++ b/share/qtcreator/qml/qmlpuppet/qml2puppet/instances/nodeinstanceserver.cpp
@@ -179,6 +179,8 @@ NodeInstanceServer::NodeInstanceServer(NodeInstanceClientInterface *nodeInstance
     m_childrenChangeEventFilter(new Internal::ChildrenChangeEventFilter(this)),
     m_nodeInstanceClient(nodeInstanceClient)
 {
+    m_idInstances.reserve(1000);
+
     qmlRegisterType<DummyContextObject>("QmlDesigner", 1, 0, "DummyContextObject");
 
     connect(m_childrenChangeEventFilter.data(), &Internal::ChildrenChangeEventFilter::childrenChanged, this, &NodeInstanceServer::emitParentChanged);
@@ -226,8 +228,8 @@ ServerNodeInstance NodeInstanceServer::instanceForId(qint32 id) const
     if (id < 0)
         return ServerNodeInstance();
 
-    Q_ASSERT(m_idInstanceHash.contains(id));
-    return m_idInstanceHash.value(id);
+    Q_ASSERT(m_idInstances.size() > id);
+    return m_idInstances[id];
 }
 
 bool NodeInstanceServer::hasInstanceForId(qint32 id) const
@@ -235,7 +237,7 @@ bool NodeInstanceServer::hasInstanceForId(qint32 id) const
     if (id < 0)
         return false;
 
-    return m_idInstanceHash.contains(id) && m_idInstanceHash.value(id).isValid();
+    return m_idInstances.size() > id && m_idInstances[id].isValid();
 }
 
 ServerNodeInstance NodeInstanceServer::instanceForObject(QObject *object) const
@@ -790,7 +792,7 @@ void NodeInstanceServer::removeAllInstanceRelationships()
         instance.makeInvalid();
     }
 
-    m_idInstanceHash.clear();
+    m_idInstances.clear();
     m_objectInstanceHash.clear();
 }
 
@@ -1243,10 +1245,11 @@ void NodeInstanceServer::notifyPropertyChange(qint32 instanceid, const PropertyN
 void NodeInstanceServer::insertInstanceRelationship(const ServerNodeInstance &instance)
 {
     Q_ASSERT(instance.isValid());
-    Q_ASSERT(!m_idInstanceHash.contains(instance.instanceId()));
     Q_ASSERT(!m_objectInstanceHash.contains(instance.internalObject()));
     m_objectInstanceHash.insert(instance.internalObject(), instance);
-    m_idInstanceHash.insert(instance.instanceId(), instance);
+    if (instance.instanceId() >= m_idInstances.size())
+        m_idInstances.resize(instance.instanceId() + 1);
+    m_idInstances[instance.instanceId()] = instance;
 }
 
 void NodeInstanceServer::removeInstanceRelationsip(qint32 instanceId)
@@ -1255,7 +1258,7 @@ void NodeInstanceServer::removeInstanceRelationsip(qint32 instanceId)
         ServerNodeInstance instance = instanceForId(instanceId);
         if (instance.isValid())
             instance.setId(QString());
-        m_idInstanceHash.remove(instanceId);
+        m_idInstances[instanceId] = ServerNodeInstance{};
         m_objectInstanceHash.remove(instance.internalObject());
         instance.makeInvalid();
     }
@@ -1383,8 +1386,8 @@ void NodeInstanceServer::removeInstanceRelationsipForDeletedObject(QObject *obje
         ServerNodeInstance instance = instanceForObject(object);
         m_objectInstanceHash.remove(object);
 
-        if (m_idInstanceHash.contains(instance.instanceId()))
-            m_idInstanceHash.remove(instance.instanceId());
+        if (instance.instanceId() >= 0 && m_idInstances.size() > instance.instanceId())
+            m_idInstances[instance.instanceId()] = ServerNodeInstance{};
     }
 }
 
diff --git a/share/qtcreator/qml/qmlpuppet/qml2puppet/instances/nodeinstanceserver.h b/share/qtcreator/qml/qmlpuppet/qml2puppet/instances/nodeinstanceserver.h
index 87eb5a1b7e9..2c628f1411b 100644
--- a/share/qtcreator/qml/qmlpuppet/qml2puppet/instances/nodeinstanceserver.h
+++ b/share/qtcreator/qml/qmlpuppet/qml2puppet/instances/nodeinstanceserver.h
@@ -160,6 +160,8 @@ public:
     ServerNodeInstance instanceForObject(QObject *object) const;
     bool hasInstanceForObject(QObject *object) const;
 
+    const QVector<ServerNodeInstance> &nodeInstances() const { return m_idInstances; }
+
     virtual QQmlEngine *engine() const = 0;
     QQmlContext *context() const;
 
@@ -272,7 +274,7 @@ private:
     void setupOnlyWorkingImports(const QStringList &workingImportStatementList);
     ServerNodeInstance m_rootNodeInstance;
     ServerNodeInstance m_activeStateInstance;
-    QHash<qint32, ServerNodeInstance> m_idInstanceHash;
+    QVector<ServerNodeInstance> m_idInstances;
     QHash<QObject*, ServerNodeInstance> m_objectInstanceHash;
     QMultiHash<QString, ObjectPropertyPair> m_fileSystemWatcherHash;
     QList<QPair<QString, QPointer<QObject> > > m_dummyObjectList;
diff --git a/share/qtcreator/qml/qmlpuppet/qml2puppet/instances/qt5capturenodeinstanceserver.cpp b/share/qtcreator/qml/qmlpuppet/qml2puppet/instances/qt5capturenodeinstanceserver.cpp
new file mode 100644
index 00000000000..aea75a76c7f
--- /dev/null
+++ b/share/qtcreator/qml/qmlpuppet/qml2puppet/instances/qt5capturenodeinstanceserver.cpp
@@ -0,0 +1,105 @@
+/****************************************************************************
+**
+** Copyright (C) 2020 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt Creator.
+**
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+****************************************************************************/
+
+#include "qt5capturenodeinstanceserver.h"
+#include "servernodeinstance.h"
+
+#include <captureddatacommand.h>
+#include <createscenecommand.h>
+#include <nodeinstanceclientinterface.h>
+
+#include <QImage>
+#include <QQuickView>
+
+namespace QmlDesigner {
+
+namespace {
+
+QImage renderPreviewImage(ServerNodeInstance rootNodeInstance)
+{
+    rootNodeInstance.updateDirtyNodeRecursive();
+
+    QSize previewImageSize = rootNodeInstance.boundingRect().size().toSize();
+
+    QImage previewImage = rootNodeInstance.renderPreviewImage(previewImageSize);
+
+    return previewImage;
+}
+
+CapturedDataCommand::StateData collectStateData(ServerNodeInstance rootNodeInstance,
+                                                const QVector<ServerNodeInstance> &nodeInstances,
+                                                qint32 stateInstanceId)
+{
+    CapturedDataCommand::StateData stateData;
+    stateData.image = ImageContainer(stateInstanceId,
+                                     QmlDesigner::renderPreviewImage(rootNodeInstance),
+                                     stateInstanceId);
+
+    for (const ServerNodeInstance &instance : nodeInstances) {
+        auto textProperty = instance.property("text");
+        if (!textProperty.isNull() && instance.holdsGraphical()) {
+            CapturedDataCommand::NodeData nodeData;
+            nodeData.nodeId = instance.instanceId();
+            nodeData.contentRect = instance.contentItemBoundingRect();
+            nodeData.sceneTransform = instance.sceneTransform();
+            nodeData.text = textProperty.toString();
+            stateData.nodeData.push_back(std::move(nodeData));
+        }
+    }
+
+    return stateData;
+}
+} // namespace
+
+void Qt5CaptureNodeInstanceServer::collectItemChangesAndSendChangeCommands()
+{
+    static bool inFunction = false;
+
+    if (!rootNodeInstance().holdsGraphical())
+        return;
+
+    if (!inFunction) {
+        inFunction = true;
+
+        DesignerSupport::polishItems(quickView());
+
+        QVector<CapturedDataCommand::StateData> stateDatas;
+        stateDatas.push_back(collectStateData(rootNodeInstance(), nodeInstances(), 0));
+
+        for (ServerNodeInstance stateInstance : rootNodeInstance().stateInstances()) {
+            stateInstance.activateState();
+            stateDatas.push_back(
+                collectStateData(rootNodeInstance(), nodeInstances(), stateInstance.instanceId()));
+            stateInstance.deactivateState();
+        }
+
+        nodeInstanceClient()->capturedData(CapturedDataCommand{stateDatas});
+
+        slowDownRenderTimer();
+        inFunction = false;
+    }
+}
+
+} // namespace QmlDesigner
diff --git a/share/qtcreator/qml/qmlpuppet/qml2puppet/instances/qt5capturenodeinstanceserver.h b/share/qtcreator/qml/qmlpuppet/qml2puppet/instances/qt5capturenodeinstanceserver.h
new file mode 100644
index 00000000000..cd0208e5633
--- /dev/null
+++ b/share/qtcreator/qml/qmlpuppet/qml2puppet/instances/qt5capturenodeinstanceserver.h
@@ -0,0 +1,45 @@
+/****************************************************************************
+**
+** Copyright (C) 2020 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt Creator.
+**
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+****************************************************************************/
+
+#pragma once
+
+#include <qt5previewnodeinstanceserver.h>
+
+namespace QmlDesigner {
+
+class Qt5CaptureNodeInstanceServer : public Qt5PreviewNodeInstanceServer
+{
+public:
+    explicit Qt5CaptureNodeInstanceServer(NodeInstanceClientInterface *nodeInstanceClient)
+        : Qt5PreviewNodeInstanceServer(nodeInstanceClient)
+    {}
+
+protected:
+    void collectItemChangesAndSendChangeCommands() override;
+
+private:
+};
+
+} // namespace QmlDesigner
diff --git a/share/qtcreator/qml/qmlpuppet/qml2puppet/instances/qt5nodeinstanceclientproxy.cpp b/share/qtcreator/qml/qmlpuppet/qml2puppet/instances/qt5nodeinstanceclientproxy.cpp
index 449e4ff188f..1cdfc910742 100644
--- a/share/qtcreator/qml/qmlpuppet/qml2puppet/instances/qt5nodeinstanceclientproxy.cpp
+++ b/share/qtcreator/qml/qmlpuppet/qml2puppet/instances/qt5nodeinstanceclientproxy.cpp
@@ -27,6 +27,7 @@
 
 #include <QCoreApplication>
 
+#include "qt5capturenodeinstanceserver.h"
 #include "qt5informationnodeinstanceserver.h"
 #include "qt5previewnodeinstanceserver.h"
 #include "qt5rendernodeinstanceserver.h"
@@ -37,7 +38,7 @@
 #if defined(Q_OS_UNIX)
 #include <unistd.h>
 #elif defined(Q_OS_WIN)
-#include <windows.h>
+#include <Windows.h>
 #endif
 
 namespace QmlDesigner {
@@ -57,18 +58,21 @@ Qt5NodeInstanceClientProxy::Qt5NodeInstanceClientProxy(QObject *parent) :
     DesignerSupport::activateDesignerWindowManager();
     if (QCoreApplication::arguments().at(1) == QLatin1String("--readcapturedstream")) {
         qputenv("DESIGNER_DONT_USE_SHARED_MEMORY", "1");
-        setNodeInstanceServer(new Qt5TestNodeInstanceServer(this));
+        setNodeInstanceServer(std::make_unique<Qt5TestNodeInstanceServer>(this));
         initializeCapturedStream(QCoreApplication::arguments().at(2));
         readDataStream();
         QCoreApplication::exit();
     } else if (QCoreApplication::arguments().at(2) == QLatin1String("previewmode")) {
-        setNodeInstanceServer(new Qt5PreviewNodeInstanceServer(this));
+        setNodeInstanceServer(std::make_unique<Qt5PreviewNodeInstanceServer>(this));
         initializeSocket();
     } else if (QCoreApplication::arguments().at(2) == QLatin1String("editormode")) {
-        setNodeInstanceServer(new Qt5InformationNodeInstanceServer(this));
+        setNodeInstanceServer(std::make_unique<Qt5InformationNodeInstanceServer>(this));
         initializeSocket();
     } else if (QCoreApplication::arguments().at(2) == QLatin1String("rendermode")) {
-        setNodeInstanceServer(new Qt5RenderNodeInstanceServer(this));
+        setNodeInstanceServer(std::make_unique<Qt5RenderNodeInstanceServer>(this));
+        initializeSocket();
+    } else if (QCoreApplication::arguments().at(2) == QLatin1String("capturemode")) {
+        setNodeInstanceServer(std::make_unique<Qt5CaptureNodeInstanceServer>(this));
         initializeSocket();
     }
 }
diff --git a/share/qtcreator/qml/qmlpuppet/qml2puppet/instances/qt5previewnodeinstanceserver.cpp b/share/qtcreator/qml/qmlpuppet/qml2puppet/instances/qt5previewnodeinstanceserver.cpp
index 50db9b99719..452f2ddd2fc 100644
--- a/share/qtcreator/qml/qmlpuppet/qml2puppet/instances/qt5previewnodeinstanceserver.cpp
+++ b/share/qtcreator/qml/qmlpuppet/qml2puppet/instances/qt5previewnodeinstanceserver.cpp
@@ -84,7 +84,8 @@ void Qt5PreviewNodeInstanceServer::collectItemChangesAndSendChangeCommands()
             instance.deactivateState();
         }
 
-        nodeInstanceClient()->statePreviewImagesChanged(StatePreviewImageChangedCommand(imageContainerVector));
+        nodeInstanceClient()->statePreviewImagesChanged(
+            StatePreviewImageChangedCommand(imageContainerVector));
 
         slowDownRenderTimer();
         inFunction = false;
diff --git a/share/qtcreator/qml/qmlpuppet/qml2puppet/instances/servernodeinstance.h b/share/qtcreator/qml/qmlpuppet/qml2puppet/instances/servernodeinstance.h
index ceb3b1e5b14..0881b738d94 100644
--- a/share/qtcreator/qml/qmlpuppet/qml2puppet/instances/servernodeinstance.h
+++ b/share/qtcreator/qml/qmlpuppet/qml2puppet/instances/servernodeinstance.h
@@ -71,6 +71,7 @@ class ServerNodeInstance
     friend class Qt5InformationNodeInstanceServer;
     friend class Qt5NodeInstanceServer;
     friend class Qt5PreviewNodeInstanceServer;
+    friend class Qt5CaptureNodeInstanceServer;
     friend class Qt5TestNodeInstanceServer;
     friend class QHash<qint32, ServerNodeInstance>;
     friend uint qHash(const ServerNodeInstance &instance);
@@ -169,6 +170,8 @@ public:
     static bool isSubclassOf(QObject *object, const QByteArray &superTypeName);
 
     void setModifiedFlag(bool b);
+    void updateDirtyNodeRecursive();
+    bool holdsGraphical() const;
 
 private: // functions
     ServerNodeInstance(const QSharedPointer<Internal::ObjectNodeInstance> &abstractInstance);
@@ -195,7 +198,6 @@ private: // functions
     void setDeleteHeldInstance(bool deleteInstance);
     void reparent(const ServerNodeInstance &oldParentInstance, const PropertyName &oldParentProperty, const ServerNodeInstance &newParentInstance, const PropertyName &newParentProperty);
 
-
     void setId(const QString &id);
 
     static QSharedPointer<Internal::ObjectNodeInstance> createInstance(QObject *objectToBeWrapped);
@@ -204,10 +206,6 @@ private: // functions
 
     void setNodeSource(const QString &source);
 
-    bool holdsGraphical() const;
-
-    void updateDirtyNodeRecursive();
-
     QObject *internalObject() const; // should be not used outside of the nodeinstances!!!!
 
 private: // variables