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// 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 DFBrowser_TreeLevelViewModel_H
#define DFBrowser_TreeLevelViewModel_H
#include <Standard.hxx>
#include <Standard_Macro.hxx>
#include <Standard_WarningsDisable.hxx>
#include <QAbstractTableModel>
#include <QVariant>
#include <Standard_WarningsRestore.hxx>
class QObject;
//! \class DFBrowser_TreeLevelViewModel
//! Tree Model of one level of OCAF tree view model. It is initialized by tree view index and
//! contains children and attributes of this label.
class DFBrowser_TreeLevelViewModel : public QAbstractTableModel
{
public:
//! Constructor
DFBrowser_TreeLevelViewModel (QObject* theParent) : QAbstractTableModel (theParent), myRowCount (0) {}
//! Destructor
virtual ~DFBrowser_TreeLevelViewModel() Standard_OVERRIDE {}
//! Reset OCAF tree model index
void Reset() { myIndex = QModelIndex(); }
//! Fills OCAF tree model index
//! \param theTreeIndex an index
Standard_EXPORT void Init (const QModelIndex& theTreeIndex);
//! Returns true if the index is filled
bool IsInitialized() const { return myIndex.isValid(); }
//! Return OCAF tree view model index on level defined by column of the parameter index
//! \param theIndex a tree level view model index
//! \return model index
Standard_EXPORT QModelIndex GetTreeViewIndex (const QModelIndex& theIndex) const;
//! Emits the layoutChanged signal from outside of this class
void EmitLayoutChanged() { emit layoutChanged(); }
//! It returns value only for DisplayRole for column = 1
//! \param theSection an index of value in the container
//! \param theIndex a model index
//! \param theRole a view role
//! \return value intepreted depending on the given role
Standard_EXPORT virtual QVariant headerData (int theSection, Qt::Orientation theOrientation,
int theRole = Qt::DisplayRole) const Standard_OVERRIDE;
//! Creates new model index
//! \param theRow the index row position
//! \param theColummn the index column position
//! \param theParent the parent index
//! \return the model index
Standard_EXPORT virtual QModelIndex index (int theRow, int theColumn,
const QModelIndex& theParent = QModelIndex()) const Standard_OVERRIDE;
//! Returns item information(short) for display role.
//! \param theIndex a model index
//! \param theRole a view role
//! \return value intepreted depending on the given role
Standard_EXPORT virtual QVariant data (const QModelIndex& theIndex,
int theRole = Qt::DisplayRole) const Standard_OVERRIDE;
//! Returns Enabled and Selectable item for any index
//! \param theIndex a model index
//! \return flags
Standard_EXPORT virtual Qt::ItemFlags flags (const QModelIndex& theIndex) const Standard_OVERRIDE;
//! Returns number of rows
virtual int rowCount (const QModelIndex& theParent = QModelIndex()) const Standard_OVERRIDE
{ (void)theParent; return myRowCount; }
//! Returns 2 columns
virtual int columnCount (const QModelIndex& theParent = QModelIndex()) const Standard_OVERRIDE
{ (void)theParent; return 2; }
private:
QModelIndex myIndex; //!< OCAF tree view model index
int myRowCount; //!< number of rows of item of treeview model index
};
#endif
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