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_OpenFileViewModel.hxx

@@ -0,0 +1,98 @@
+// 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_OpenFileViewModel_H
+#define ShapeView_OpenFileViewModel_H
+
+#include <Standard.hxx>
+#include <Standard_Macro.hxx>
+
+#ifdef _MSC_VER
+#pragma warning(disable : 4127) // conditional expression is constant
+#endif
+#include <QAbstractTableModel>
+#include <QStringList>
+#include <QItemDelegate>
+
+class QObject;
+class QPainter;
+
+//! \class TInspectorEXE_OpenFileItemDelegate
+//! Draws large(40x40) icons in cell. The icon background in colored in highlight when mouse is over button
+class ShapeView_OpenFileItemDelegate : public QItemDelegate
+{
+public:
+
+  //! Constructor
+  ShapeView_OpenFileItemDelegate (QObject* theParent, const QColor& theHighlight)
+  : QItemDelegate (theParent), myColor(theHighlight) {}
+
+  //! Destructor
+  virtual ~ShapeView_OpenFileItemDelegate() {}
+
+  //! Draw an icon in the cell
+  //! \param thePainter a painter
+  //! \param theOption a paint options
+  //! \param theIndex a view index
+  Standard_EXPORT void paint (QPainter* thePainter, const QStyleOptionViewItem& theOption,
+                              const QModelIndex& theIndex) const;
+
+private:
+
+  QColor myColor; //!< highlight color
+};
+
+//! \class TInspectorEXE_OpenFileViewModel
+//! Table model that visualizes container of string values (file names)
+//! Table orientation is horizontal, it has 1 row, number of columns equals to number of values
+class ShapeView_OpenFileViewModel : public QAbstractTableModel
+{
+public:
+
+  //! Constructor
+  ShapeView_OpenFileViewModel (QObject* theParent = 0) : QAbstractTableModel (theParent) {}
+
+  //! Destructor
+  virtual ~ShapeView_OpenFileViewModel() {}
+
+  //! Store values
+  //! \param theValues a container of values to fill model
+  void Init (const QStringList& theValues);
+
+  //! Returns content of the model index for the given role, it is obtained from internal container of values
+  //! It returns value only for DisplayRole.
+  //! \param theIndex a model index
+  //! \param theRole a view role
+  //! \return value intepreted depending on the given role
+  virtual QVariant data (const QModelIndex& theIndex, int theRole = Qt::DisplayRole) const Standard_OVERRIDE;
+
+  //! Returns number of rows
+  //! \param theParent an index of the parent item
+  //! \return an integer value
+  virtual int rowCount (const QModelIndex& theParent = QModelIndex()) const Standard_OVERRIDE
+  { (void)theParent; return 1; }
+
+  //! Returns number of columns
+  //! \param theParent an index of the parent item
+  //! \return an integer value
+  virtual int columnCount (const QModelIndex& theParent = QModelIndex()) const Standard_OVERRIDE
+  { (void)theParent; return myValues.size(); }
+
+private:
+
+  QStringList myValues; //!< file names
+};
+
+#endif