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/DFBrowserPane/DFBrowserPane_TableView.hxx

@@ -0,0 +1,69 @@
+// 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 DFBrowserPane_TableView_H
+#define DFBrowserPane_TableView_H
+
+#include <Standard.hxx>
+
+#ifdef _MSC_VER
+#pragma warning(disable : 4127) // conditional expression is constant
+#endif
+#include <QWidget>
+#include <QMap>
+
+class QTableView;
+class QAbstractTableModel;
+
+//! \class DFBrowserPane_TableView
+//! \brief The widget that contains table view with some settings:
+//! - table grid is hidden
+//! - vertical header is hidden
+//! - stretch last column by horizonal
+//! - default width of columns.
+class DFBrowserPane_TableView : public QWidget
+{
+public:
+
+  //! Constructor
+  Standard_EXPORT DFBrowserPane_TableView (QWidget* theParent,
+                                           const QMap<int, int>& theDefaultColumnWidths = QMap<int, int>());
+  //! Destructor
+  virtual ~DFBrowserPane_TableView() {}
+
+  //! Sets model into table view. After, set column widths for view
+  Standard_EXPORT void SetModel (QAbstractTableModel* theModel);
+
+  //! Returns the current table view
+  QTableView* GetTableView() const { return myTableView; }
+
+  //! Updates table view height to contain the given number of rows only
+  //! \param theCount a row count
+  //! \param theView a table view, which size will be changed
+  Standard_EXPORT static void SetFixedRowCount (const int theCount, QTableView* theView);
+
+  //! Returns names of selected items in the view
+  //! \param theView a table view
+  //! \param theColumnId a column index
+  //! \return container of strings
+  Standard_EXPORT static QStringList GetSelectedColumnValues (QTableView* theTable, const int theColumnId);
+
+private:
+
+  QTableView* myTableView; //!< the current table view
+  QMap<int, int> myDefaultColumnWidths; //!< container of default widths of columns
+};
+
+#endif