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/*=========================================================================
Program: Visualization Toolkit
Module: ExternalVTKWidget.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.
=========================================================================*/
#include "ExternalVTKWidget.h"
#include "vtkObjectFactory.h"
#include "vtkRendererCollection.h"
vtkStandardNewMacro(ExternalVTKWidget);
//----------------------------------------------------------------------------
ExternalVTKWidget::ExternalVTKWidget()
{
this->RenderWindow = 0;
}
//----------------------------------------------------------------------------
ExternalVTKWidget::~ExternalVTKWidget()
{
this->SetRenderWindow(NULL);
}
//----------------------------------------------------------------------------
vtkExternalOpenGLRenderWindow* ExternalVTKWidget::GetRenderWindow()
{
if (!this->RenderWindow)
{
vtkExternalOpenGLRenderWindow * win = vtkExternalOpenGLRenderWindow::New();
this->SetRenderWindow(win);
win->Delete();
}
return this->RenderWindow;
}
//----------------------------------------------------------------------------
vtkExternalOpenGLRenderer* ExternalVTKWidget::AddRenderer(void)
{
vtkExternalOpenGLRenderer* ren = vtkExternalOpenGLRenderer::New();
this->GetRenderWindow()->AddRenderer(ren);
ren->Delete();
return ren;
}
//----------------------------------------------------------------------------
void ExternalVTKWidget::PrintSelf(ostream &os, vtkIndent indent)
{
this->Superclass::PrintSelf(os, indent);
}
//----------------------------------------------------------------------------
void ExternalVTKWidget::SetRenderWindow(vtkExternalOpenGLRenderWindow * w)
{
// Do nothing if we don't have to
if (this->RenderWindow == w)
{
return;
}
// Swap the renderers from the old window to the new one
vtkRendererCollection* renderers = 0;
// Unregister the previous window
if (this->RenderWindow)
{
renderers = this->RenderWindow->GetRenderers();
// Increase reference count of the renderer collection to
// make sure the reference exists for the new render window
renderers->Register(this);
this->RenderWindow->Finalize();
this->RenderWindow->SetMapped(0);
this->RenderWindow->UnRegister(this);
}
// Now, set the new window
this->RenderWindow = w;
if (this->RenderWindow)
{
// If it is mapped somewhere else, unmap it.
this->RenderWindow->Finalize();
this->RenderWindow->SetMapped(1);
this->RenderWindow->Register(this);
if (renderers)
{
// Add the renderers
vtkRenderer * aren;
vtkCollectionSimpleIterator rsit;
for (renderers->InitTraversal(rsit);
(aren = renderers->GetNextRenderer(rsit)); )
{
this->RenderWindow->AddRenderer(aren);
}
}
}
if (renderers)
{
// Decrease reference count of the renderer collection
renderers->UnRegister(this);
}
}
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