mitk::DisplayInteractor Class Reference [Interaction Classes]

The class handles zooming and panning events. More...

#include <mitkDisplayInteractor.h>

Inheritance diagram for mitk::DisplayInteractor:

Collaboration diagram for mitk::DisplayInteractor:

List of all members.

Public Member Functions
	DisplayInteractor (mitk::BaseRenderer *ren=0)
	constructor for renderer specific zooming panning initialization
virtual void	ExecuteOperation (mitk::Operation *operation)
	implementation of ExecuteOperation from mitk::OperationActor interface this method triggers the zooming and panning stuff in the appropriate renderer

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Detailed Description

The class handles zooming and panning events.

One can connect it via itk::GlobalInteraction->AddStateMachine(new mitk::DisplayVectorInteractor("move", new DisplayInterActor())); to the global state machine.

Definition at line 34 of file mitkDisplayInteractor.h.

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Constructor & Destructor Documentation

mitk::DisplayInteractor::DisplayInteractor

(

mitk::BaseRenderer *

ren = 0 )

constructor for renderer specific zooming panning initialization

The window associated with the passed renderer will be the only one where this interactor works on.

Definition at line 32 of file mitkDisplayInteractor.cpp.

{
  m_ParentRenderer = ren;
}

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Member Function Documentation

void mitk::DisplayInteractor::ExecuteOperation

(

mitk::Operation *

operation )

[virtual]

implementation of ExecuteOperation from mitk::OperationActor interface this method triggers the zooming and panning stuff in the appropriate renderer

Implements mitk::OperationActor.

Definition at line 37 of file mitkDisplayInteractor.cpp.

References QuadProgPP::distance(), mitk::BaseRenderer::GetDisplayGeometry(), mitk::DisplayCoordinateOperation::GetLastToCurrentDisplayVector(), mitk::Operation::GetOperationType(), mitk::DisplayCoordinateOperation::GetRenderer(), mitk::BaseRenderer::GetRenderingManager(), mitk::BaseRenderer::GetRenderWindow(), mitk::DisplayCoordinateOperation::GetStartCoordinateInMM(), mitk::DisplayCoordinateOperation::GetStartDisplayCoordinate(), mitk::DisplayGeometry::MoveBy(), mitk::OpMOVE, mitk::OpZOOM, mitk::RenderingManager::RequestUpdate(), and mitk::DisplayGeometry::ZoomWithFixedWorldCoordinates().

{

  bool ok;//as return type

  mitk::DisplayCoordinateOperation* dcOperation=dynamic_cast<mitk::DisplayCoordinateOperation*>(operation);
  if ( dcOperation != NULL )
  {
    /****ZOOM & MOVE of the whole volume****/
    mitk::BaseRenderer* renderer = dcOperation->GetRenderer();
    if( renderer == NULL || (m_ParentRenderer != NULL && m_ParentRenderer != renderer))
      return;
    switch (operation->GetOperationType())
    {
    case OpMOVE :
      {
        renderer->GetDisplayGeometry()->MoveBy(dcOperation->GetLastToCurrentDisplayVector()*(-1.0));
        renderer->GetRenderingManager()->RequestUpdate(renderer->GetRenderWindow());
        ok = true;
      }
      break;
    case OpZOOM :
      {
        float distance = dcOperation->GetLastToCurrentDisplayVector()[1];

        //float factor= 1.0 + distance * 0.05; // stupid because factors from +1 and -1 dont give results that represent inverse zooms

        float factor = 1.0;

        if (distance < 0.0)
        {
          factor = 1.0 / 1.05;
        }
        else if (distance > 0.0)
        {
          factor = 1.0 * 1.05; // 5%
        }
        else // distance == 0.0
        {
          // nothing to do, factor remains 1.0
        }
        
        renderer->GetDisplayGeometry()->ZoomWithFixedWorldCoordinates(factor, dcOperation->GetStartDisplayCoordinate(), dcOperation->GetStartCoordinateInMM());
        
        renderer->GetRenderingManager()->RequestUpdate(renderer->GetRenderWindow());
        ok = true;
      }
      break;
    default:
      ;
    }
  }
}

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The documentation for this class was generated from the following files:

• mitkDisplayInteractor.h
• mitkDisplayInteractor.cpp