Adaption of FreeCAD to QuarterWidget

-removes all soqtviewer references
-create a quarter adaptor class which implements missing functionality
-adopts freecad code to make use of SoRenderManager and changed View3DInventorViewer  interface

src/Gui/Application.cpp

@@ -102,6 +102,8 @@
 
 #include "Language/Translator.h"
 #include "TaskView/TaskDialogPython.h"
+#include <Gui/Quarter/Quarter.h>
+#include "View3DViewerPy.h"
 #include "GuiInitScript.h"
 
 
@@ -300,14 +302,6 @@ FreeCADGui_getSoDBVersion(PyObject * /*self*/, PyObject *args)
     return PyString_FromString(SoDB::getVersion());
 }
 
-static PyObject *
-FreeCADGui_getSoQtVersion(PyObject * /*self*/, PyObject *args)
-{
-    if (!PyArg_ParseTuple(args, ""))
-        return NULL;
-    return PyString_FromString(SoQt::getVersionString());
-}
-
 struct PyMethodDef FreeCADGui_methods[] = {
     {"subgraphFromObject",FreeCADGui_subgraphFromObject,METH_VARARGS,
      "subgraphFromObject(object) -> Node\n\n"
@@ -316,10 +310,6 @@ struct PyMethodDef FreeCADGui_methods[] = {
      "getSoDBVersion() -> String\n\n"
      "Return a text string containing the name\n"
      "of the Coin library and version information"},
-    {"getSoQtVersion",FreeCADGui_getSoQtVersion,METH_VARARGS,
-     "getSoQtVersion() -> String\n\n"
-     "Return a text string containing the name\n"
-     "of the SoQt library and version information"},
     {NULL, NULL}  /* sentinel */
 };
 
@@ -450,12 +440,11 @@ Application::~Application()
     BitmapFactoryInst::destruct();
 
 #if 0
-    // we must run the garbage collector before shutting down the SoDB or SoQt 
+    // we must run the garbage collector before shutting down the SoDB 
     // subsystem because we may reference some class objects of them in Python
     Base::Interpreter().cleanupSWIG("SoBase *");
     // finish also Inventor subsystem
     SoFCDB::finish();
-    SoQt::done();
 
 #if (COIN_MAJOR_VERSION >= 2) && (COIN_MINOR_VERSION >= 4)
     SoDB::finish();
@@ -1440,10 +1429,6 @@ void messageHandlerCoin(const SoError * error, void * userdata)
     }
 }
 
-void messageHandlerSoQt(const SbString errmsg, SoQt::FatalErrors errcode, void *userdata)
-{
-    Base::Console().Error( errmsg.getString() );
-}
 #endif
 
 // To fix bug #0000345 move Q_INIT_RESOURCE() outside initApplication()
@@ -1673,7 +1658,7 @@ void Application::runApplication(void)
 
     // init the Inventor subsystem
     SoDB::init();
-    SoQt::init(&mw);
+    SIM::Coin3D::Quarter::Quarter::init();
     SoFCDB::init();
 
     QString home = QString::fromUtf8(App::GetApplication().GetHomePath());
@@ -1775,7 +1760,6 @@ void Application::runApplication(void)
 
 #ifdef FC_DEBUG // redirect Coin messages to FreeCAD
     SoDebugError::setHandlerCallback( messageHandlerCoin, 0 );
-    SoQt::setFatalErrorHandler( messageHandlerSoQt, 0 );
 #endif