Initial implementation of Spreadsheet module (C++ version) by Eivind Kvedalen.

Various fixes for Windows by
Peter Lama <peterldev94@gmail.com>
Werner Mayer <wmayer@users.sourceforge.net>

src/Mod/Spreadsheet/App/SheetObserver.cpp

@@ -0,0 +1,126 @@
+/***************************************************************************
+ *   Copyright (c) Eivind Kvedalen (eivind@kvedalen.name) 2015             *
+ *                                                                         *
+ *   This file is part of the FreeCAD CAx development system.              *
+ *                                                                         *
+ *   This library is free software; you can redistribute it and/or         *
+ *   modify it under the terms of the GNU Library General Public           *
+ *   License as published by the Free Software Foundation; either          *
+ *   version 2 of the License, or (at your option) any later version.      *
+ *                                                                         *
+ *   This library  is distributed in the hope that it will be useful,      *
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
+ *   GNU Library General Public License for more details.                  *
+ *                                                                         *
+ *   You should have received a copy of the GNU Library General Public     *
+ *   License along with this library; see the file COPYING.LIB. If not,    *
+ *   write to the Free Software Foundation, Inc., 59 Temple Place,         *
+ *   Suite 330, Boston, MA  02111-1307, USA                                *
+ *                                                                         *
+ ***************************************************************************/
+
+#include "PreCompiled.h"
+#include "SheetObserver.h"
+#include "PropertySheet.h"
+
+using namespace Spreadsheet;
+using namespace App;
+
+/**
+  * The SheetObserver constructor.
+  *
+  * @param document The Document we are observing
+  * @param _sheet   The sheet owning this observer.
+  *
+  */
+
+SheetObserver::SheetObserver(App::Document * document, PropertySheet *_sheet)
+    : DocumentObserver(document)
+    , sheet(_sheet)
+    , refCount(1)
+{
+}
+
+/**
+  * Unimplemented.
+  *
+  */
+
+void SheetObserver::slotCreatedDocument(const App::Document &Doc)
+{
+}
+
+/**
+  * Unimplemented.
+  *
+  */
+
+void SheetObserver::slotDeletedDocument(const App::Document &Doc)
+{
+}
+
+/**
+  * Invalidate cells that depend on this document object.
+  *
+  */
+
+void SheetObserver::slotCreatedObject(const DocumentObject &Obj)
+{
+    sheet->invalidateDependants(&Obj);
+}
+
+/**
+  * Invalidate cells that depend on this document object.
+  *
+  */
+
+void SheetObserver::slotDeletedObject(const DocumentObject &Obj)
+{
+    sheet->invalidateDependants(&Obj);
+}
+
+/**
+  * Invoke the sheets recomputeDependants when a change to a Property occurs.
+  *
+  */
+
+void SheetObserver::slotChangedObject(const DocumentObject &Obj, const Property &Prop)
+{
+    const char * name = Obj.getPropertyName(&Prop);
+    assert(name != 0);
+
+    if (&Prop == &Obj.Label)
+        sheet->renamedDocumentObject(&Obj);
+    else {
+
+        if (isUpdating.find(name) != isUpdating.end())
+            return;
+
+        isUpdating.insert(name);
+        sheet->recomputeDependants(&Prop);
+        isUpdating.erase(name);
+    }
+}
+
+/**
+  * Increase reference count.
+  *
+  */
+
+void SheetObserver::ref()
+{
+    refCount++;
+}
+
+/**
+  * Decrease reference count.
+  *
+  */
+
+bool SheetObserver::unref()
+{
+    refCount--;
+    return refCount;
+}
+