+ fixes #0001332: Allow copy-paste on elements in Project tree

src/Gui/Document.cpp

@@ -42,6 +42,7 @@
 
 #include <App/Document.h>
 #include <App/DocumentObject.h>
+#include <App/DocumentObjectGroup.h>
 
 #include "Application.h"
 #include "MainWindow.h"
@@ -889,6 +890,33 @@ void Document::importObjects(const std::vector<App::DocumentObject*>& obj, Base:
     xmlReader.readEndElement("Document");
 }
 
+void Document::addRootObjectsToGroup(const std::vector<App::DocumentObject*>& obj, App::DocumentObjectGroup* grp)
+{
+    std::map<App::DocumentObject*, bool> rootMap;
+    for (std::vector<App::DocumentObject*>::const_iterator it = obj.begin(); it != obj.end(); ++it) {
+        rootMap[*it] = true;
+    }
+    // get the view providers and check which objects are children
+    for (std::vector<App::DocumentObject*>::const_iterator it = obj.begin(); it != obj.end(); ++it) {
+        Gui::ViewProvider* vp = getViewProvider(*it);
+        if (vp) {
+            std::vector<App::DocumentObject*> child = vp->claimChildren();
+            for (std::vector<App::DocumentObject*>::iterator jt = child.begin(); jt != child.end(); ++jt) {
+                std::map<App::DocumentObject*, bool>::iterator kt = rootMap.find(*jt);
+                if (kt != rootMap.end()) {
+                    kt->second = false;
+                }
+            }
+        }
+    }
+
+    // all objects that are not children of other objects can be added to the group
+    for (std::map<App::DocumentObject*, bool>::iterator it = rootMap.begin(); it != rootMap.end(); ++it) {
+        if (it->second)
+            grp->addObject(it->first);
+    }
+}
+
 void Document::createView(const char* sType) 
 {
     View3DInventor* view3D = new View3DInventor(this, getMainWindow());

src/Gui/Document.h

@@ -37,11 +37,14 @@
 
 class SoPath;
 
-namespace Base
-{
+namespace Base {
 class Matrix4D;
 }
 
+namespace App {
+class DocumentObjectGroup;
+}
+
 namespace Gui {
 
 class ViewProvider;
@@ -122,6 +125,8 @@ public:
     virtual void RestoreDocFile(Base::Reader &reader);
     void exportObjects(const std::vector<App::DocumentObject*>&, Base::Writer&);
     void importObjects(const std::vector<App::DocumentObject*>&, Base::Reader&);
+    /// Add all root objects of the given array to a group
+    void addRootObjectsToGroup(const std::vector<App::DocumentObject*>&, App::DocumentObjectGroup*);
     //@}
 
     /// Observer message from the App doc

src/Gui/MainWindow.cpp

@@ -60,6 +60,7 @@
 #include <Base/Writer.h>
 #include <App/Application.h>
 #include <App/DocumentObject.h>
+#include <App/DocumentObjectGroup.h>
 
 #include "MainWindow.h"
 #include "Application.h"
@@ -1521,7 +1522,13 @@ void MainWindow::insertFromMimeData (const QMimeData * mimeData)
         std::istream in(0);
         in.rdbuf(&buf);
         MergeDocuments mimeView(doc);
-        mimeView.importObjects(in);
+        std::vector<App::DocumentObject*> newObj = mimeView.importObjects(in);
+        std::vector<App::DocumentObjectGroup*> grp = Gui::Selection().getObjectsOfType<App::DocumentObjectGroup>();
+        if (grp.size() == 1) {
+            Gui::Document* gui = Application::Instance->getDocument(doc);
+            if (gui)
+                gui->addRootObjectsToGroup(newObj, grp.front());
+        }
     }
     else if (mimeData->hasFormat(QLatin1String("application/x-documentobject-file"))) {
         QByteArray res = mimeData->data(QLatin1String("application/x-documentobject-file"));
@@ -1531,8 +1538,14 @@ void MainWindow::insertFromMimeData (const QMimeData * mimeData)
         Base::FileInfo fi((const char*)res);
         Base::ifstream str(fi, std::ios::in | std::ios::binary);
         MergeDocuments mimeView(doc);
-        mimeView.importObjects(str);
+        std::vector<App::DocumentObject*> newObj = mimeView.importObjects(str);
         str.close();
+        std::vector<App::DocumentObjectGroup*> grp = Gui::Selection().getObjectsOfType<App::DocumentObjectGroup>();
+        if (grp.size() == 1) {
+            Gui::Document* gui = Application::Instance->getDocument(doc);
+            if (gui)
+                gui->addRootObjectsToGroup(newObj, grp.front());
+        }
     }
     else if (mimeData->hasUrls()) {
         // load the files into the active document if there is one, otherwise let create one

src/Gui/Workbench.cpp

@@ -406,17 +406,20 @@ void StdWorkbench::setupContextMenu(const char* recipient, MenuItem* item) const
         *item << "Std_ViewFitAll" << "Std_ViewFitSelection" << "Std_DrawStyle" << StdViews << measure
               << "Separator" << "Std_ViewDockUndockFullscreen";
 
-        if (Gui::Selection().countObjectsOfType(App::DocumentObject::getClassTypeId()) > 0 )
+        if (Gui::Selection().countObjectsOfType(App::DocumentObject::getClassTypeId()) > 0) {
             *item << "Separator" << "Std_SetAppearance" << "Std_ToggleVisibility"
                   << "Std_ToggleSelectability" << "Std_TreeSelection" 
                   << "Std_RandomColor" << "Separator" << "Std_Delete";
             }
+    }
     else if (strcmp(recipient,"Tree") == 0)
     {
-        if (Gui::Selection().countObjectsOfType(App::DocumentObject::getClassTypeId()) > 0 )
+        if (Gui::Selection().countObjectsOfType(App::DocumentObject::getClassTypeId()) > 0) {
             *item << "Std_ToggleVisibility" << "Std_ShowSelection" << "Std_HideSelection"
                   << "Std_ToggleSelectability" << "Separator" << "Std_SetAppearance"
-                  << "Std_RandomColor" << "Separator" << "Std_Delete";
+                  << "Std_RandomColor" << "Std_Cut" << "Std_Copy" << "Std_Paste"
+                  << "Separator" << "Std_Delete";
+        }
     }
 }