// -*- c++ -*-
/*=========================================================================

  Program:   Visualization Toolkit
  Module:    vtkPVTrackballMultiRotate.cxx

  Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
  All rights reserved.
  See Copyright.txt or http://www.kitware.com/Copyright.htm for details.

     This software is distributed WITHOUT ANY WARRANTY; without even
     the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
     PURPOSE.  See the above copyright notice for more information.

=========================================================================*/

/*-------------------------------------------------------------------------
  Copyright 2009 Sandia Corporation.
  Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
  the U.S. Government retains certain rights in this software.
-------------------------------------------------------------------------*/

#include "vtkPVTrackballMultiRotate.h"

#include "vtkObjectFactory.h"
#include "vtkPVTrackballRoll.h"
#include "vtkPVTrackballRotate.h"
#include "vtkRenderer.h"

#define MY_MAX(x, y) ((x) < (y) ? (y) : (x))
#define MY_SQR(x)    ((x)*(x))

//=============================================================================
vtkStandardNewMacro(vtkPVTrackballMultiRotate);

//-----------------------------------------------------------------------------
vtkPVTrackballMultiRotate::vtkPVTrackballMultiRotate()
{
  this->RotateManipulator = vtkPVTrackballRotate::New();
  this->RollManipulator = vtkPVTrackballRoll::New();
  this->CurrentManipulator = NULL;
}

vtkPVTrackballMultiRotate::~vtkPVTrackballMultiRotate()
{
  this->CurrentManipulator = NULL;
  this->RotateManipulator->Delete();
  this->RollManipulator->Delete();
}

void vtkPVTrackballMultiRotate::PrintSelf(ostream &os, vtkIndent indent)
{
  this->Superclass::PrintSelf(os, indent);
}

//-----------------------------------------------------------------------------
void vtkPVTrackballMultiRotate::OnButtonDown(int x, int y, vtkRenderer *ren,
                                             vtkRenderWindowInteractor *rwi)
{
  int *viewSize;
  viewSize = ren->GetSize();
  double  viewCenter[2];
  viewCenter[0] = 0.5*viewSize[0];  viewCenter[1] = 0.5*viewSize[1];
  double rotateRadius = 0.9*(MY_MAX(viewCenter[0], viewCenter[1]));
  double dist2 = MY_SQR(viewCenter[0]-x) + MY_SQR(viewCenter[1]-y);

  if (rotateRadius*rotateRadius > dist2)
    {
    this->CurrentManipulator = this->RotateManipulator;
    }
  else
    {
    this->CurrentManipulator = this->RollManipulator;
    }

  this->CurrentManipulator->SetButton(this->GetButton());
  this->CurrentManipulator->SetShift(this->GetShift());
  this->CurrentManipulator->SetControl(this->GetControl());
  this->CurrentManipulator->SetCenter(this->GetCenter());

  this->CurrentManipulator->OnButtonDown(x, y, ren, rwi);
}

//-----------------------------------------------------------------------------
void vtkPVTrackballMultiRotate::OnButtonUp(int x, int y, vtkRenderer *ren,
                                           vtkRenderWindowInteractor *rwi)
{
  if (this->CurrentManipulator)
    {
    this->CurrentManipulator->OnButtonUp(x, y, ren, rwi);
    }
}

//-----------------------------------------------------------------------------
void vtkPVTrackballMultiRotate::OnMouseMove(int x, int y, vtkRenderer *ren,
                                            vtkRenderWindowInteractor *rwi)
{
  if (this->CurrentManipulator)
    {
    this->CurrentManipulator->OnMouseMove(x, y, ren, rwi);
    }
}
