Gui: add method setDocumentOfViewers and set documents of viewers in constructor of SplitView3DInventor

src/Gui/ManualAlignment.cpp

@@ -381,16 +381,13 @@ public:
         mainSplitter = new QSplitter(Qt::Horizontal, this);
         if (glformat) {
             _viewer.push_back(new View3DInventorViewer(f, mainSplitter));
-            _viewer.back()->setDocument(pcDocument);
             _viewer.push_back(new View3DInventorViewer(f, mainSplitter));
-            _viewer.back()->setDocument(pcDocument);
         }
         else {
             _viewer.push_back(new View3DInventorViewer(mainSplitter));
-            _viewer.back()->setDocument(pcDocument);
             _viewer.push_back(new View3DInventorViewer(mainSplitter));
-            _viewer.back()->setDocument(pcDocument);
         }
+        setDocumentOfViewers(pcDocument);
 
         auto vbox = new QFrame(this);
         auto layout = new QVBoxLayout();

src/Gui/SplitView3DInventor.cpp

@@ -73,6 +73,13 @@ void AbstractSplitView::deleteSelf()
     MDIView::deleteSelf();
 }
 
+void AbstractSplitView::setDocumentOfViewers(Gui::Document* document)
+{
+    for (auto view : _viewer) {
+        view->setDocument(document);
+    }
+}
+
 void AbstractSplitView::viewAll()
 {
     for (std::vector<View3DInventorViewer*>::iterator it = _viewer.begin(); it != _viewer.end(); ++it)
@@ -820,6 +827,8 @@ SplitView3DInventor::SplitView3DInventor(int views, Gui::Document* pcDocument, Q
     mainSplitter->show();
     setCentralWidget(mainSplitter);
 
+    setDocumentOfViewers(pcDocument);
+
     // apply the user settings
     setupSettings();
 }

src/Gui/SplitView3DInventor.h

@@ -66,6 +66,7 @@ public:
     int getSize();
 
 protected:
+    void setDocumentOfViewers(Gui::Document* document);
     void setupSettings();
 
 protected: