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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 TreeModel_VisibilityState_H
#define TreeModel_VisibilityState_H
#include <inspector/TreeModel_ModelBase.hxx>
#include <inspector/TreeModel_ColumnType.hxx>
#include <Standard.hxx>
#include <Standard_Macro.hxx>
//! \class TreeModel_VisibilityState
//! \brief Interface that provides connection between model and visualization control to:
//! - know whether the model item is visible
//! - change visibility of the model item
class TreeModel_VisibilityState
{
public:
//! Constructor
TreeModel_VisibilityState(TreeModel_ModelBase* theModel)
: myModel(theModel)
{
}
//! Destructor
~TreeModel_VisibilityState() {}
//! Returns true if visibility of the item can be changed
//! \param theIndex tree model index
//! \return boolean value
virtual bool CanBeVisible(const QModelIndex& theIndex) const = 0;
//! Sets visibility state
//! \param theIndex tree model index
//! \param theState visibility state
//! \param toEmitDataChanged boolean flag whether emit of the model should be done immediately
//! \return true if state is changed
virtual bool SetVisible(const QModelIndex& theIndex,
const bool theState,
const bool toEmitDataChanged = true) = 0;
//! Returns visibility state value
//! \param theIndex tree model index
//! \return boolean value
virtual bool IsVisible(const QModelIndex& theIndex) const = 0;
protected:
//! Processes the mouse clicked on the index.
//! It changes the item visibility if model allows to change it.
//! \theIndex tree model index
//! \return true if click is processed
Standard_EXPORT bool processClicked(const QModelIndex& theIndex);
protected:
//! tree view model
TreeModel_ModelBase* getModel() const { return myModel; }
private:
TreeModel_ModelBase* myModel; //!< tree view model
};
#endif
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