Part: section cut window is not bound to 3d viewer widget

src/Mod/Part/Gui/Command.cpp

@@ -2501,33 +2501,13 @@ void CmdPartSectionCut::activated(int iMsg)
     Q_UNUSED(iMsg);
     static QPointer<PartGui::SectionCut> sectionCut = nullptr;
     if (!sectionCut) {
-        Gui::View3DInventor* view = qobject_cast<Gui::View3DInventor*>(Gui::getMainWindow()->activeWindow());
-        if (view) {
-            sectionCut = PartGui::SectionCut::makeDockWidget(view);
-        }
+        sectionCut = PartGui::SectionCut::makeDockWidget(Gui::getMainWindow());
     }
 }
 
 bool CmdPartSectionCut::isActive(void)
 {
-#if 0
-    Gui::View3DInventor* view = qobject_cast<View3DInventor*>(Gui::getMainWindow()->activeWindow());
-    if (view) {
-        Gui::Action* action = qobject_cast<Action*>(_pcAction);
-        if (action->isChecked() != view->hasClippingPlane())
-            action->setChecked(view->hasClippingPlane());
-        return true;
-    }
-    else {
-        Gui::Action* action = qobject_cast<Action*>(_pcAction);
-        if (action->isChecked())
-            action->setChecked(false);
-        return false;
-    }
-#else
-    Gui::View3DInventor* view = qobject_cast<Gui::View3DInventor*>(Gui::getMainWindow()->activeWindow());
-    return view ? true : false;
-#endif
+    return hasActiveDocument();
 }
 
 //---------------------------------------------------------------

src/Mod/Part/Gui/SectionCutting.cpp

@@ -663,10 +663,10 @@ void SectionCut::startCutting(bool isInitial)
     }
 }
 
-SectionCut* SectionCut::makeDockWidget(Gui::View3DInventor* view)
+SectionCut* SectionCut::makeDockWidget(QWidget* parent)
 {
     // embed this dialog into a QDockWidget
-    SectionCut* sectionCut = new SectionCut(view);
+    SectionCut* sectionCut = new SectionCut(parent);
     Gui::DockWindowManager* pDockMgr = Gui::DockWindowManager::instance();
     // the dialog is designed that you can see the tree, thus put it to the right side
     QDockWidget* dw = pDockMgr->addDockWindow("Section Cutting", sectionCut, Qt::RightDockWidgetArea);

src/Mod/Part/Gui/SectionCutting.h

@@ -26,8 +26,6 @@
 #include <QDialog>
 #include <App/DocumentObject.h>
 
-namespace Gui { class View3DInventor; }
-
 namespace PartGui {
 
 class Ui_SectionCut;
@@ -37,7 +35,7 @@ class SectionCut : public QDialog
     Q_OBJECT
 
 public:
-    static SectionCut* makeDockWidget(Gui::View3DInventor*);
+    static SectionCut* makeDockWidget(QWidget* parent = nullptr);
     SectionCut(QWidget* parent = nullptr);
     ~SectionCut();