Core: Gui: SoFCSysDragger: changes to SoFCDB to store dragger.

src/Gui/SoFCDB.cpp

@@ -27,6 +27,7 @@
 # include <Inventor/VRMLnodes/SoVRMLGroup.h>
 # include <Inventor/VRMLnodes/SoVRMLParent.h>
 # include <Inventor/SbString.h>
+# include <Inventor/nodes/SoGroup.h>
 #endif
 
 #include <Base/FileInfo.h>
@@ -53,6 +54,7 @@
 #include "Inventor/SoDrawingGrid.h"
 #include "Inventor/SoAutoZoomTranslation.h"
 #include "Inventor/MarkerBitmaps.h"
+#include "SoFCCSysDragger.h"
 
 #include "propertyeditor/PropertyItem.h"
 #include "NavigationStyle.h"
@@ -64,6 +66,7 @@ using namespace Gui::Inventor;
 using namespace Gui::PropertyEditor;
 
 static SbBool init_done = false;
+static SoGroup *storage = nullptr;
 
 SbBool Gui::SoFCDB::isInitialized(void)
 {
@@ -112,6 +115,7 @@ void Gui::SoFCDB::init()
     SoDrawingGrid                   ::initClass();
     SoAutoZoomTranslation           ::initClass();
     MarkerBitmaps                   ::initClass();
+    SoFCCSysDragger                 ::initClass();
 
     PropertyItem                    ::init();
     PropertySeparatorItem           ::init();
@@ -160,6 +164,10 @@ void Gui::SoFCDB::init()
     qRegisterMetaType<Base::Quantity>("Base::Quantity");
     qRegisterMetaType<QList<Base::Quantity> >("Base::QuantityList");
     init_done = true;
+    
+    assert(!storage);
+    storage = new SoGroup();
+    storage->ref();
 }
 
 void Gui::SoFCDB::finish()
@@ -181,6 +189,9 @@ void Gui::SoFCDB::finish()
     SoFCEnableHighlightAction       ::finish();
     SoFCSelectionColorAction        ::finish();
     SoFCHighlightColorAction        ::finish();
+    
+    storage->unref();
+    storage = nullptr;
 }
 
 // buffer acrobatics for inventor ****************************************************
@@ -287,3 +298,9 @@ bool Gui::SoFCDB::writeToFile(SoNode* node, const char* filename, bool binary)
 
     return ret;
 }
+
+SoGroup* Gui::SoFCDB::getStorage()
+{
+  assert(storage); //call init first.
+  return storage;
+}