0027398: Integrate Qt Browser Widget to Open CASCADE Technology

The following implementation has been made:
- CMake procedure is extended to compile Qt tools. This is optional and is handled by USE_QT_TOOLS option(OFF by default)
- It is possible to build Qt tools using Qt5 or Qt4, it is settled with USE_QT4 option.
- Sample of DFBrowser tool is available in samples/tools/TInspectorEXE. It is build with tools, executable is placed in binaries. To start the sample, use dfbrowser.bat command.
- DFBrowser tool may be started from DRAW

tools/ShapeView/ShapeView_TreeModel.cxx

@@ -0,0 +1,86 @@
+// Created on: 2017-06-16
+// Created by: Natalia ERMOLAEVA
+// Copyright (c) 2017 OPEN CASCADE SAS
+//
+// This file is part of Open CASCADE Technology software library.
+//
+// This library is free software; you can redistribute it and/or modify it under
+// the terms of the GNU Lesser General Public License version 2.1 as published
+// by the Free Software Foundation, with special exception defined in the file
+// OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
+// distribution for complete text of the license and disclaimer of any warranty.
+//
+// Alternatively, this file may be used under the terms of Open CASCADE
+// commercial license or contractual agreement. 
+
+#include <ShapeView_TreeModel.hxx>
+#include <ShapeView_ItemRoot.hxx>
+
+// =======================================================================
+// function : Constructor
+// purpose :
+// =======================================================================
+ShapeView_TreeModel::ShapeView_TreeModel (QObject* theParent)
+: TreeModel_ModelBase (theParent)
+{
+  for (int aColumnId = 0, aNbColumns = columnCount(); aColumnId < aNbColumns; aColumnId++)
+    myRootItems.insert(aColumnId, ShapeView_ItemRoot::CreateItem(TreeModel_ItemBasePtr(), 0, aColumnId));
+
+  m_pRootItem = myRootItems[0];
+}
+
+// =======================================================================
+// function : AddShape
+// purpose :
+// =======================================================================
+void ShapeView_TreeModel::AddShape(const TopoDS_Shape& theShape)
+{
+  for (int aColId = 0, aNbColumns = columnCount(); aColId < aNbColumns; aColId++)
+  {
+    ShapeView_ItemRootPtr aRootItem = itemDynamicCast<ShapeView_ItemRoot>(RootItem (aColId));
+    aRootItem->AddShape(theShape);
+  }
+
+  Reset();
+  EmitLayoutChanged();
+}
+
+// =======================================================================
+// function : RemoveAllShapes
+// purpose :
+// =======================================================================
+void ShapeView_TreeModel::RemoveAllShapes()
+{
+  for (int aColId = 0, aNbColumns = columnCount(); aColId < aNbColumns; aColId++)
+  {
+    ShapeView_ItemRootPtr aRootItem = itemDynamicCast<ShapeView_ItemRoot>(RootItem (aColId));
+    aRootItem->RemoveAllShapes();
+  }
+  Reset();
+  EmitLayoutChanged();
+}
+
+// =======================================================================
+// function : headerData
+// purpose :
+// =======================================================================
+QVariant ShapeView_TreeModel::headerData (int theSection, Qt::Orientation theOrientation, int theRole) const
+{
+  if (theOrientation != Qt::Horizontal || theRole != Qt::DisplayRole)
+    return QVariant();
+  {
+    switch (theSection)
+    {
+      case 0: return "Name";
+      case 1: return "Size";
+      case 2: return "Pointer";
+      case 3: return "Orientation";
+      case 4: return "Location";
+      case 5: return "Flags"; // Checked/Closed/Infinite/Locked/Modified/Orientable
+      case 7: return "Other";
+        //Auto Triangulation
+      default: break;
+    }
+  }
+  return QVariant();
+}