allow to access NaviCube of 3d viewer

2018-10-23 12:47:11 +02:00
parent 7c4ab45e31
commit 8678f74dc6
4 changed files with 54 additions and 17 deletions
--- a/src/Gui/CommandView.cpp
+++ b/src/Gui/CommandView.cpp
@@ -2003,7 +2003,12 @@ protected:
    {
        Gui::View3DInventor* view = qobject_cast<View3DInventor*>(Gui::getMainWindow()->activeWindow());
        if (view) {
-            SoGroup* group = static_cast<SoGroup*>(view->getViewer()->getSceneGraph());
+            Gui::View3DInventorViewer* viewer = view->getViewer();
+            if (!viewer)
+                return false; // no active viewer
+            SoGroup* group = dynamic_cast<SoGroup*>(viewer->getSceneGraph());
+            if (!group)
+                return false; // empty scene graph
            bool hasaxis = group->findChild(axisGroup) != -1;
            if (_pcAction->isChecked() != hasaxis)
                _pcAction->setChecked(hasaxis);