[vtkusers] QVTKWidget and Axis Display (using vtkOrientationMarkerWidget)

[Hamid G]

Hi

I am trying to add a simple axis display to the Qt/VTK example from the wiki:

http://www.vtk.org/Wiki/VTK/Examples/Cxx/Qt/SideBySideRenderWindows

Following the sample from http://goo.gl/sRnv5 which uses
vtkOrientationMarkerWidget to display
axes, I only modified the code in SimpleView.cxx by creating a vtkAxesActor and
vtkOrientationMarkerWidget objects (see below)

The program crashes and I am suspecting that I am not setting
vtkOrientationMarkerWidget's interactor
properly. How do I get/set proper vtkRenderWindowInteractor for QVTKWidget?

==========
Modified SimpleView.cxx
==========
#include "ui_SimpleView.h"
#include "SimpleView.h"

#include <vtkDataObjectToTable.h>
#include <vtkElevationFilter.h>
#include <vtkPolyDataMapper.h>
#include <vtkQtTableView.h>
#include <vtkRenderer.h>
#include <vtkRenderWindow.h>
#include <vtkSphereSource.h>
#include <vtkCubeSource.h>
#include "vtkAxesActor.h"
#include "vtkOrientationMarkerWidget.h"
#include <vtkPropAssembly.h>

#include "vtkSmartPointer.h"

// Constructor
SimpleView::SimpleView()
{
  this->ui = new Ui_SimpleView;
  this->ui->setupUi(this);

  // sphere
  vtkSmartPointer<vtkSphereSource> sphereSource =
      vtkSmartPointer<vtkSphereSource>::New();
  sphereSource->Update();
  vtkSmartPointer<vtkPolyDataMapper> sphereMapper =
      vtkSmartPointer<vtkPolyDataMapper>::New();
  sphereMapper->SetInputConnection(sphereSource->GetOutputPort());
  vtkSmartPointer<vtkActor> sphereActor =
      vtkSmartPointer<vtkActor>::New();
  sphereActor->SetMapper(sphereMapper);

  // cube
  vtkSmartPointer<vtkCubeSource> cubeSource =
      vtkSmartPointer<vtkCubeSource>::New();
  cubeSource->Update();
  vtkSmartPointer<vtkPolyDataMapper> cubeMapper =
      vtkSmartPointer<vtkPolyDataMapper>::New();
  cubeMapper->SetInputConnection(cubeSource->GetOutputPort());
  vtkSmartPointer<vtkActor> cubeActor =
      vtkSmartPointer<vtkActor>::New();
  cubeActor->SetMapper(cubeMapper);

  // VTK Renderer
  vtkSmartPointer<vtkRenderer> leftRenderer =
      vtkSmartPointer<vtkRenderer>::New();
  leftRenderer->AddActor(sphereActor);

  vtkSmartPointer<vtkRenderer> rightRenderer =
      vtkSmartPointer<vtkRenderer>::New();

  // Add Actor to renderer
  rightRenderer->AddActor(cubeActor);

  // VTK/Qt wedded
  this->ui->qvtkWidgetLeft->GetRenderWindow()->AddRenderer(leftRenderer);
  this->ui->qvtkWidgetRight->GetRenderWindow()->AddRenderer(rightRenderer);

  // Modification starts -->
  vtkRenderWindowInteractor *iren =
ui->qvtkWidgetLeft->GetRenderWindow()->GetInteractor();

  vtkSmartPointer<vtkAxesActor> axes =
          vtkSmartPointer<vtkAxesActor>::New();

  vtkSmartPointer<vtkOrientationMarkerWidget> widget =
          vtkSmartPointer<vtkOrientationMarkerWidget>::New();

  widget->SetOutlineColor( 0.9300, 0.5700, 0.1300 );
  widget->SetOrientationMarker( axes );
  widget->SetInteractor( iren );
  widget->SetViewport( 0.0, 0.0, 0.4, 0.4 );
  widget->SetEnabled( 1 );
  widget->InteractiveOn();


  leftRenderer->ResetCamera();
  rightRenderer->ResetCamera();

  // Modification ends <--

  // Set up action signals and slots
  connect(this->ui->actionExit, SIGNAL(triggered()), this, SLOT(slotExit()));

}

void SimpleView::slotExit()
{
  qApp->exit();
}


==========
Crash report (Max OSX 10.6.8, vtk 5.9)
==========
Exception Type:  EXC_BAD_ACCESS (SIGSEGV)
Exception Codes: KERN_INVALID_ADDRESS at 0x000000004d5555c8
Crashed Thread:  0  Dispatch queue: com.apple.main-thread

Thread 0 Crashed:  Dispatch queue: com.apple.main-thread
0   libvtkRendering.5.9.dylib     	0x0000000100e75e23
vtkRenderer::GetActiveCamera() + 19
1   libvtkWidgets.5.9.dylib       	0x00000001003b60e0
vtkOrientationMarkerWidget::ExecuteCameraUpdateEvent(vtkObject*,
unsigned long, void*) + 32
2   libvtkCommon.5.9.dylib        	0x00000001025f4067
vtkSubjectHelper::InvokeEvent(unsigned long, void*, vtkObject*) + 1303
3   libvtkRendering.5.9.dylib     	0x0000000100e76f00 vtkRenderer::Render() + 96
4   libvtkRendering.5.9.dylib     	0x0000000100e73551
vtkRendererCollection::Render() + 129
5   libvtkRendering.5.9.dylib     	0x0000000100e7da35
vtkRenderWindow::DoStereoRender() + 181
6   libvtkRendering.5.9.dylib     	0x0000000100e7d821
vtkRenderWindow::DoFDRender() + 881
7   libvtkRendering.5.9.dylib     	0x0000000100e7dfa2
vtkRenderWindow::DoAARender() + 1186
8   libvtkRendering.5.9.dylib     	0x0000000100e7b99b
vtkRenderWindow::Render() + 267
9   libvtkRendering.5.9.dylib     	0x0000000100e7fef9
vtkRenderWindowInteractor::Render() + 89
10  libQVTK.5.9.dylib             	0x000000010002812d
QVTKWidget::paintEvent(QPaintEvent*) + 141
11  QtGui                         	0x0000000103092ae6
QWidget::event(QEvent*) + 2294
12  libQVTK.5.9.dylib             	0x00000001000285e9
QVTKWidget::event(QEvent*) + 89
13  QtGui                         	0x0000000103038d9d
QApplicationPrivate::notify_helper(QObject*, QEvent*) + 189
14  QtGui                         	0x000000010303ebfd
QApplication::notify(QObject*, QEvent*) + 349
15  QtCore                        	0x0000000103e645fc
QCoreApplication::notifyInternal(QObject*, QEvent*) + 124
16  QtGui                         	0x0000000103038f5c
qt_sendSpontaneousEvent(QObject*, QEvent*) + 44
17  QtGui                         	0x0000000102fe218d -[QCocoaView
drawRect:] + 1213
18  com.apple.AppKit              	0x00007fff82629cc5 -[NSView
_drawRect:clip:] + 3390


Any input/hint is appreciated.

thanks in advance,
Hamid G