fixes #0004125: MDIViews not accessible correctly

src/Mod/TechDraw/Gui/AppTechDrawGui.cpp

@@ -37,6 +37,7 @@
 #include <Gui/WidgetFactory.h>
 
 #include "Workbench.h"
+#include "MDIViewPage.h"
 
 #include "DlgPrefsTechDrawImp.h"
 #include "DlgPrefsTechDraw2Imp.h"
@@ -114,6 +115,7 @@ PyMOD_INIT_FUNC(TechDrawGui)
     CreateTechDrawCommandsAnnotate();
 
     TechDrawGui::Workbench::init();
+    TechDrawGui::MDIViewPage::init();
 
     TechDrawGui::ViewProviderPage::init();
     TechDrawGui::ViewProviderDrawingView::init();

src/Mod/TechDraw/Gui/MDIViewPage.cpp

@@ -111,6 +111,8 @@ using namespace TechDrawGui;
 
 /* TRANSLATOR TechDrawGui::MDIViewPage */
 
+TYPESYSTEM_SOURCE_ABSTRACT(TechDrawGui::MDIViewPage, Gui::MDIView)
+
 MDIViewPage::MDIViewPage(ViewProviderPage *pageVp, Gui::Document* doc, QWidget* parent)
   : Gui::MDIView(doc, parent),
     m_orientation(QPrinter::Landscape),
@@ -847,7 +849,7 @@ QPrinter::PaperSize MDIViewPage::getPaperSize(int w, int h) const
 
 PyObject* MDIViewPage::getPyObject()
 {
-    Py_Return;
+    return Gui::MDIView::getPyObject();
 }
 
 void MDIViewPage::contextMenuEvent(QContextMenuEvent *event)

src/Mod/TechDraw/Gui/MDIViewPage.h

@@ -51,6 +51,7 @@ class QGIView;
 class TechDrawGuiExport MDIViewPage : public Gui::MDIView, public Gui::SelectionObserver
 {
     Q_OBJECT
+    TYPESYSTEM_HEADER();
 
 public:
     MDIViewPage(ViewProviderPage *page, Gui::Document* doc, QWidget* parent = 0);