// Created on: 1995-03-02
// Created by: Jean-Louis Frenkel
// Copyright (c) 1995-1999 Matra Datavision
// Copyright (c) 1999-2014 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_Grid_HeaderFile
#define _Aspect_Grid_HeaderFile

#include <Standard.hxx>

#include <Quantity_Color.hxx>
#include <Aspect_GridDrawMode.hxx>
#include <Standard_Transient.hxx>

class Aspect_Grid : public Standard_Transient
{
  DEFINE_STANDARD_RTTIEXT(Aspect_Grid, Standard_Transient)
public:
  //! defines the x Origin of the grid.
  Standard_EXPORT void SetXOrigin(const double anOrigin);

  //! defines the y Origin of the grid.
  Standard_EXPORT void SetYOrigin(const double anOrigin);

  //! defines the orientation of the grid.
  Standard_EXPORT void SetRotationAngle(const double anAngle);

  //! Rotate the grid from a relative angle.
  Standard_EXPORT void Rotate(const double anAngle);

  //! Translate the grid from a relative distance.
  Standard_EXPORT void Translate(const double aDx, const double aDy);

  //! Change the colors of the grid
  Standard_EXPORT virtual void SetColors(const Quantity_Color& aColor,
                                         const Quantity_Color& aTenthColor);

  //! returns the point of the grid the closest to the point X,Y
  //! if the grid is active. If the grid is not active returns
  //! X,Y.
  Standard_EXPORT void Hit(const double X, const double Y, double& gridX, double& gridY) const;

  //! returns the point of the grid the closest to the point X,Y
  Standard_EXPORT virtual void Compute(const double X,
                                       const double Y,
                                       double&      gridX,
                                       double&      gridY) const = 0;

  //! activates the grid. The Hit method will return
  //! gridx and gridx computed according to the steps
  //! of the grid.
  void Activate() { myIsActive = true; }

  //! deactivates the grid. The hit method will return
  //! gridx and gridx as the enter value X & Y.
  void Deactivate() { myIsActive = false; }

  //! returns the x Origin of the grid.
  double XOrigin() const { return myXOrigin; }

  //! returns the x Origin of the grid.
  double YOrigin() const { return myYOrigin; }

  //! returns the x Angle of the grid.
  double RotationAngle() const { return myRotationAngle; }

  //! Returns TRUE when the grid is active.
  bool IsActive() const { return myIsActive; }

  //! Returns the colors of the grid.
  Standard_EXPORT void Colors(Quantity_Color& aColor, Quantity_Color& aTenthColor) const;

  //! Change the grid aspect.
  Standard_EXPORT void SetDrawMode(const Aspect_GridDrawMode aDrawMode);

  //! Returns the grid aspect.
  Aspect_GridDrawMode DrawMode() const { return myDrawMode; }

  //! Display the grid at screen.
  Standard_EXPORT virtual void Display() = 0;

  //! Erase the grid from screen.
  Standard_EXPORT virtual void Erase() const = 0;

  //! Returns TRUE when the grid is displayed at screen.
  Standard_EXPORT virtual bool IsDisplayed() const = 0;

  Standard_EXPORT virtual void Init() = 0;

  //! Dumps the content of me into the stream
  Standard_EXPORT virtual void DumpJson(Standard_OStream& theOStream, int theDepth = -1) const;

protected:
  //! Creates a new grid. By default this grid is not active.
  Standard_EXPORT Aspect_Grid(const double          theXOrigin       = 0.0,
                              const double          theYOrigin       = 0.0,
                              const double          theRotationAngle = 0,
                              const Quantity_Color& theColor         = Quantity_NOC_GRAY50,
                              const Quantity_Color& theTenthColor    = Quantity_NOC_GRAY70);

  //! Updates the grid parameters.
  Standard_EXPORT virtual void UpdateDisplay() = 0;

protected:
  double              myRotationAngle;
  double              myXOrigin;
  double              myYOrigin;
  Quantity_Color      myColor;
  Quantity_Color      myTenthColor;
  bool                myIsActive;
  Aspect_GridDrawMode myDrawMode;
};

#endif // _Aspect_Grid_HeaderFile
