vtkViewImage2DCollectionCommand.cxx

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/*=========================================================================
  Author: $Author:$  // Author of last commit
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=========================================================================*/

/*=========================================================================
 Authors: The GoFigure Dev. Team.
 at Megason Lab, Systems biology, Harvard Medical school, 2009-11

 Copyright (c) 2009-11, President and Fellows of Harvard College.
 All rights reserved.

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 modification, are permitted provided that the following conditions are met:

 Redistributions of source code must retain the above copyright notice,
 this list of conditions and the following disclaimer.
 Redistributions in binary form must reproduce the above copyright notice,
 this list of conditions and the following disclaimer in the documentation
 and/or other materials provided with the distribution.
 Neither the name of the  President and Fellows of Harvard College
 nor the names of its contributors may be used to endorse or promote
 products derived from this software without specific prior written
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 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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=========================================================================*/
#include "vtkViewImage2DCollectionCommand.h"
#include "vtkInteractorStyleImage2D.h"
#include "vtkViewImage2DCommand.h"
#include "vtkRenderer.h"
#include "vtkCamera.h"
#include "vtkMath.h"
#include "vtkRenderWindow.h"
#include "vtkRenderWindowInteractor.h"
#include "vtkCellPicker.h"
#include "vtkViewImage2DCollection.h"

//--------------------------------------------------------------------------
vtkViewImage2DCollectionCommand::vtkViewImage2DCollectionCommand()
{
  m_SynchronizeViews = true;
}

//--------------------------------------------------------------------------
vtkViewImage2DCollectionCommand::
~vtkViewImage2DCollectionCommand()
{
}

//--------------------------------------------------------------------------

//--------------------------------------------------------------------------
void
vtkViewImage2DCollectionCommand::SetCollection(vtkViewImage2DCollection *p)
{
  this->Collection = p;
}

//--------------------------------------------------------------------------

//--------------------------------------------------------------------------
vtkViewImage2DCollectionCommand *
vtkViewImage2DCollectionCommand::New()
{
  return new vtkViewImage2DCollectionCommand;
}

//--------------------------------------------------------------------------

//--------------------------------------------------------------------------
vtkViewImage2DCollection *
vtkViewImage2DCollectionCommand::GetCollection()
{
  return this->Collection;
}

//--------------------------------------------------------------------------
void
vtkViewImage2DCollectionCommand::SynchronizeViews( bool iSynchronizeViews)
{
  m_SynchronizeViews = iSynchronizeViews;
}

//--------------------------------------------------------------------------
void vtkViewImage2DCollectionCommand::Execute( vtkObject *caller,
                                               unsigned long event,
                                               void *vtkNotUsed(callData) )
{
  if ( !this->Collection )
    {
    return;
    }

  if( !m_SynchronizeViews )
    {
      return;
    }

  if ( event == vtkCommand::EndInteractionEvent )
    {
    this->Collection->SyncRender();
    return;
    }

  vtkInteractorStyleImage2D *isi =
    vtkInteractorStyleImage2D::SafeDownCast(caller);
  this->GetCollection()->InitTraversal();
  vtkViewImage2D *v = this->GetCollection()->GetNextItem();
  vtkViewImage2D *viewer = NULL;
  while ( v )
    {
    if ( isi == v->GetInteractorStyle() )
      {
      viewer = v;
      break;
      }
    v = this->GetCollection()->GetNextItem();
    }

  if ( !isi || !viewer || !viewer->GetInput() )
    {
    return;
    }

  // Reset
  if ( event == vtkCommand::ResetWindowLevelEvent )
    {
    this->Collection->SyncResetWindowLevel();
    this->Collection->SyncRender();
    return;
    }
  // Reset
  if ( event == vtkViewImage2DCommand::ResetViewerEvent )
    {
    this->Collection->SyncReset();
    this->Collection->SyncRender();
    return;
    }

  // Adjust the window level here
  if ( event == vtkCommand::WindowLevelEvent )
    {
    this->Collection->SyncSetColorWindow( viewer->GetColorWindow() );
    this->Collection->SyncSetColorLevel( viewer->GetColorLevel() );
    this->Collection->SyncRender();
    }

  // Move
  if ( event == vtkViewImage2DCommand::SyncViewsEvent )
    {
    this->Collection->SyncRender();
    }

  if ( event == vtkViewImage2DCommand::ZoomEvent )
    {
    double z = viewer->GetZoom();
    double parallel_scale =
      viewer->GetRenderer()->GetActiveCamera()->GetParallelScale();

    this->Collection->SyncSetZoomAndParallelScale(z, parallel_scale);
    }

  if ( event == vtkViewImage2DCommand::PanEvent )
    {
    double motion[3];
    viewer->GetCameraMotionVector(motion);

    this->GetCollection()->InitTraversal();
    v = this->GetCollection()->GetNextItem();
    double focal[3], pos[3], n[3];
    double dot = 0., u;

    while ( v )
      {
      if ( v != viewer )
        {
        v->GetCameraFocalAndPosition(focal, pos);
        v->GetRenderer()->GetActiveCamera()->GetViewPlaneNormal(n);
        dot = vtkMath::Dot(n, motion);

        for ( int dim = 0; dim < 3; dim++ )
          {
          u = motion[dim] - dot * n[dim];
          focal[dim] += u;
          pos[dim] += u;
          }
        v->SetCameraFocalAndPosition(focal, pos);

        if ( v->GetInteractorStyle()->GetInteractor()->GetLightFollowCamera() )
          {
          v->GetRenderer()->UpdateLightsGeometryToFollowCamera();
          }
        }
      v->Render();
      v = this->GetCollection()->GetNextItem();
      }
    }

  // Position requested
  if ( event == vtkViewImage2DCommand::RequestedPositionEvent )
    {
    double *position = viewer->GetWorldCoordinatesFromDisplayPosition (
        isi->GetRequestedPosition () );
    this->Collection->SyncSetWorldCoordinates(position);
    this->Collection->SyncRender();
    }
}