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.hxx

@@ -0,0 +1,72 @@
+// 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. 
+
+#ifndef ShapeView_TreeModel_H
+#define ShapeView_TreeModel_H
+
+#include <ShapeView_ItemBase.hxx>
+#include <Standard.hxx>
+#include <TopoDS_Shape.hxx>
+#include <TreeModel_ModelBase.hxx>
+
+#include <QMap>
+#include <QObject>
+
+class ShapeView_TreeModel;
+
+//! \class ShapeView_TreeModel
+//! View model to visualize content of TopoDS_Shape
+class ShapeView_TreeModel : public TreeModel_ModelBase
+{
+public:
+
+  //! Constructor
+  Standard_EXPORT ShapeView_TreeModel (QObject* theParent);
+
+  //! Destructor
+  virtual ~ShapeView_TreeModel() Standard_OVERRIDE {};
+
+  //! Add shape, append it to the model root item
+  //! \param theShape a shape instance
+  Standard_EXPORT void AddShape (const TopoDS_Shape& theShape);
+
+  //! Remove all shapes in the model root item
+  Standard_EXPORT void RemoveAllShapes();
+
+  //! Returns root item by column
+  //! \param theColumn an index of the column
+  //! \return root item instance
+  virtual TreeModel_ItemBasePtr RootItem(const int theColumn) const Standard_OVERRIDE
+  { return myRootItems[theColumn]; }
+
+  //! Returns count of columns in the model.
+  //! \param theParent an index of the parent item
+  //! \return integer value
+  virtual int columnCount (const QModelIndex& theParent = QModelIndex()) const Standard_OVERRIDE
+  { (void)theParent; return 7; }
+
+  //! Returns the header data for the given role and section in the header with the specified orientation.
+  //! \param theSection the header section. For horizontal headers - column number, for vertical headers - row number.
+  //! \param theOrientation a header orientation
+  //! \param theRole a data role
+  //! \return the header data
+  Standard_EXPORT virtual QVariant headerData (int theSection, Qt::Orientation theOrientation,
+                                               int theRole = Qt::DisplayRole ) const Standard_OVERRIDE;
+
+private:
+  QMap<int, TreeModel_ItemBasePtr> myRootItems; //!< container of root items, for each column own root item
+};
+
+#endif