From 381a59bb36342fd091ddedd0e70b28852135fdaf Mon Sep 17 00:00:00 2001
From: blobfish <blobfish@gmx.com>
Date: Sun, 9 Aug 2015 11:45:38 -0400
Subject: [PATCH] Core: Gui: SoFCSysDragger: changes to SoFCDB to store
 dragger.

---
 src/Gui/SoFCDB.cpp | 17 +++++++++++++++++
 src/Gui/SoFCDB.h   |  7 ++++++-
 2 files changed, 23 insertions(+), 1 deletion(-)

diff --git a/src/Gui/SoFCDB.cpp b/src/Gui/SoFCDB.cpp
index 0ed3b6d0c741..f1cdd03ed77c 100644
--- a/src/Gui/SoFCDB.cpp
+++ b/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;
+}
diff --git a/src/Gui/SoFCDB.h b/src/Gui/SoFCDB.h
index 9e9d0a82c837..129f4e045d36 100644
--- a/src/Gui/SoFCDB.h
+++ b/src/Gui/SoFCDB.h
@@ -28,9 +28,10 @@
 #include <Inventor/SbBasic.h>
 
 class SoNode;
+class SoGroup;
 namespace Gui {
 /**
- * The FreeCAD database class to initialioze all onw Inventor nodes.
+ * The FreeCAD database class to initialize all our own Inventor nodes.
  * @author Werner Mayer
  */
 class GuiExport SoFCDB
@@ -44,6 +45,10 @@ class GuiExport SoFCDB
     static bool writeToVRML(SoNode* node, const char* filename, bool binary);
     // Write to VRML or Inventor file
     static bool writeToFile(SoNode* node, const char* filename, bool binary);
+    /*! container for app lifetime storage. See SoFCCSysDragger for details
+     * on why this is needed.
+     */ 
+    static SoGroup* getStorage();
 };
 
 } // namespace Gui