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// Created on: 2020-01-25
// Created by: Natalia ERMOLAEVA
// Copyright (c) 2020 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 View_DisplayPreview_H
#define View_DisplayPreview_H
#include <inspector/View_DisplayActionType.hxx>
#include <AIS_InteractiveContext.hxx>
#include <Standard.hxx>
#include <Standard_Handle.hxx>
#include <Standard_Macro.hxx>
class AIS_InteractiveObject;
class View_PreviewParameters;
//! \class View_DisplayPreview
//! \brief It is responsible for communication with AIS Interactive Context to:
//! - display/erase presentations;
//! - change display mode of visualized presentations (Shaded or WireFrame mode)
//!
//! It contains containers of visualized presentations to obtain presentations relating only to this
//! displayer. Displayer is connected to AIS Interactive Context
class View_DisplayPreview
{
public:
//! Constructor
Standard_EXPORT View_DisplayPreview();
//! Destructor
virtual ~View_DisplayPreview() {}
//! Stores the current context where the presentations will be displayed/erased.
//! Erases previously displayed presentations if there were some displayed
//! \param theContext a context instance
Standard_EXPORT void SetContext(const Handle(AIS_InteractiveContext)& theContext);
//! Returns preview parameters
View_PreviewParameters* GetPreviewParameters() const { return myPreviewParameters; }
//! Updates visibility of the presentations for the display type
Standard_EXPORT void UpdatePreview(
const View_DisplayActionType theType,
const NCollection_List<Handle(Standard_Transient)>& thePresentations);
//! Returns true if preview presentation is shown
Standard_Boolean HasPreview() const { return !myPreviewPresentation.IsNull(); }
//! Custom preview selection mode
static Standard_Integer PreviewSelectionMode() { return 100; }
private:
//! Returns the current context
const Handle(AIS_InteractiveContext)& GetContext() const { return myContext; }
private:
Handle(AIS_InteractiveContext) myContext; //!< context, where the displayer works
View_PreviewParameters* myPreviewParameters; //!< drawer of preview presentation
Handle(AIS_InteractiveObject)
myPreviewPresentation; //!< presentation of preview for a selected object
NCollection_List<Handle(AIS_InteractiveObject)>
myPreviewReadyPresentations; //!< presentation of preview for a selected object
};
#endif
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