// Copyright (c) 2016 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 _Aspect_NeutralWindow_HeaderFile
#define _Aspect_NeutralWindow_HeaderFile

#include <Aspect_Window.hxx>

//! Defines a platform-neutral window.
//! This class is intended to be used in context when window management (including OpenGL context creation)
//! is performed on application side (e.g. using external framework).
//!
//! Window properties should be managed by application and assigned to this class as properties.
class Aspect_NeutralWindow : public Aspect_Window
{
  DEFINE_STANDARD_RTTIEXT(Aspect_NeutralWindow, Aspect_Window)
public:

  //! Empty constructor.
  //! Note that window is considered "mapped" by default.
  Standard_EXPORT Aspect_NeutralWindow();

  //! Return native handle of this drawable.
  virtual Aspect_Drawable NativeHandle() const Standard_OVERRIDE { return myHandle; }

  //! Return native handle of the parent drawable.
  virtual Aspect_Drawable NativeParentHandle() const Standard_OVERRIDE { return myParentHandle; }

  //! Return FBConfig.
  virtual Aspect_FBConfig NativeFBConfig() const Standard_OVERRIDE { return myFBConfig; }

  //! Set native handle.
  //! @return true if definition has been changed
  Standard_Boolean SetNativeHandle (Aspect_Drawable theWindow) { return SetNativeHandles (theWindow, 0, 0); }

  //! Set native handles.
  //! @return true if definition has been changed
  Standard_EXPORT Standard_Boolean SetNativeHandles (Aspect_Drawable theWindow,
                                                     Aspect_Drawable theParentWindow,
                                                     Aspect_FBConfig theFbConfig);

  //! Return true if window is not hidden.
  virtual Standard_Boolean IsMapped() const Standard_OVERRIDE { return myIsMapped; }

  //! Change window mapped flag to TRUE.
  virtual void Map()   const Standard_OVERRIDE { myIsMapped = Standard_True; }

  //! Change window mapped flag to FALSE.
  virtual void Unmap() const Standard_OVERRIDE { myIsMapped = Standard_False; }

  //! Resize window - do nothing.
  virtual Aspect_TypeOfResize DoResize() Standard_OVERRIDE { return Aspect_TOR_UNKNOWN; }

  //! Map window - do nothing.
  virtual Standard_Boolean DoMapping() const Standard_OVERRIDE { return Standard_True; }

  //! Returns window ratio equal to the physical width/height dimensions.
  virtual Standard_Real Ratio() const Standard_OVERRIDE
  {
    return (myWidth != 0 && myHeight != 0)
         ? Standard_Real(myWidth) / Standard_Real(myHeight)
         : 1.0;
  }

  //! Return the window position.
  virtual void Position (Standard_Integer& theX1, Standard_Integer& theY1,
                         Standard_Integer& theX2, Standard_Integer& theY2) const Standard_OVERRIDE
  {
    theX1 = myPosX;
    theX2 = myPosX + myWidth;
    theY1 = myPosY;
    theY2 = myPosY + myHeight;
  }

  //! Set the window position.
  //! @return true if position has been changed
  Standard_EXPORT Standard_Boolean SetPosition (Standard_Integer theX1,
                                                Standard_Integer theY1);

  //! Set the window position.
  //! @return true if position has been changed
  Standard_EXPORT Standard_Boolean SetPosition (Standard_Integer theX1, Standard_Integer theY1,
                                                Standard_Integer theX2, Standard_Integer theY2);

  //! Return the window size.
  virtual void Size (Standard_Integer& theWidth,
                     Standard_Integer& theHeight) const Standard_OVERRIDE
  {
    theWidth  = myWidth;
    theHeight = myHeight;
  }

  //! Set the window size.
  //! @return true if size has been changed
  Standard_EXPORT Standard_Boolean SetSize (const Standard_Integer theWidth,
                                            const Standard_Integer theHeight);

protected:

  Aspect_Drawable  myHandle;
  Aspect_Drawable  myParentHandle;
  Aspect_FBConfig  myFBConfig;
  Standard_Integer myPosX;
  Standard_Integer myPosY;
  Standard_Integer myWidth;
  Standard_Integer myHeight;
  mutable Standard_Boolean myIsMapped;

};

DEFINE_STANDARD_HANDLE(Aspect_NeutralWindow, Aspect_Window)

#endif // _Aspect_NeutralWindow_HeaderFile