Gui New Feature: Gui::Document support for App::Document undo and red…

…o signals

==========================================================================

It defines new slots connected to App::Document's signalUndo/signalRedo, which
triggers Gui::Document's signalUndoDocument and signalRedoDocument signals.

setModified is not executed upon redo/undo, as this is already done on modification of the properties if
properties were modified, and if there were not, no setModified is needed anyway.

src/Gui/Document.cpp

@@ -96,6 +96,8 @@ struct DocumentP
     Connection connectFinishLoadDocument;
     Connection connectExportObjects;
     Connection connectImportObjects;
+    Connection connectUndoDocument;
+    Connection connectRedoDocument;
 };
 
 } // namespace Gui
@@ -142,6 +144,11 @@ Document::Document(App::Document* pcDocument,Application * app)
         (boost::bind(&Gui::Document::exportObjects, this, _1, _2));
     d->connectImportObjects = pcDocument->signalImportViewObjects.connect
         (boost::bind(&Gui::Document::importObjects, this, _1, _2, _3));
+
+    d->connectUndoDocument = pcDocument->signalUndo.connect
+        (boost::bind(&Gui::Document::slotUndoDocument, this, _1));
+    d->connectRedoDocument = pcDocument->signalRedo.connect
+        (boost::bind(&Gui::Document::slotRedoDocument, this, _1));  
 
     // pointer to the python class
     // NOTE: As this Python object doesn't get returned to the interpreter we
@@ -171,6 +178,8 @@ Document::~Document()
     d->connectFinishLoadDocument.disconnect();
     d->connectExportObjects.disconnect();
     d->connectImportObjects.disconnect();
+    d->connectUndoDocument.disconnect();
+    d->connectRedoDocument.disconnect();
 
     // e.g. if document gets closed from within a Python command
     d->_isClosing = true;
@@ -535,6 +544,22 @@ void Document::slotActivatedObject(const App::DocumentObject& Obj)
     }
 }
 
+void Document::slotUndoDocument(const App::Document& doc)
+{
+    if (d->_pcDocument != &doc)
+        return;
+
+    signalUndoDocument(*this);  
+}
+
+void Document::slotRedoDocument(const App::Document& doc)
+{
+    if (d->_pcDocument != &doc)
+        return;
+
+    signalRedoDocument(*this);   
+}
+
 void Document::setModified(bool b)
 {
     d->_isModified = b;

src/Gui/Document.h

@@ -77,6 +77,8 @@ class GuiExport Document : public Base::Persistence
     void slotActivatedObject(const App::DocumentObject&);
     void slotStartRestoreDocument(const App::Document&);
     void slotFinishRestoreDocument(const App::Document&);
+    void slotUndoDocument(const App::Document&);
+    void slotRedoDocument(const App::Document&);
     //@}
 
 public:
@@ -105,7 +107,10 @@ class GuiExport Document : public Base::Persistence
     /// signal on changed Object, the 2nd argument is the highlite mode to use
     mutable boost::signal<void (const Gui::ViewProviderDocumentObject&,
                                 const Gui::TreeItemMode&)>               signalExpandObject;
-
+    /// signal on undo Document
+    mutable boost::signal<void (const Gui::Document& doc)> signalUndoDocument;
+    /// signal on redo Document
+    mutable boost::signal<void (const Gui::Document& doc)> signalRedoDocument;
     //@}
 
     /** @name I/O of the document */