[vtkusers] Problem with vtkChartXY::SetTitle and vtkAxis::SetTitle

[Frese Daniel Dr.]

Hi Andrew, Marcus,
I am still interested in this issue, too. Since May, when I reported a similar issue (the quoted post by Andrew), I took care to combine only Release binaries or only Debug binaries, and it worked nicely so far. And I guess this is really all a user can ask for ☺.
But still, a strange feeling remains. During the (admittedly quite limited time) I have been using vtk, this was the only place within the toolkit that led to trouble mixing a debug app and a release vtk lib. I am aware, that with MSVC (I still use version 2008) anything strange can happen if you mix these, but for my applications the fact remains, that everything I tried works fine with mixed debug/release stuff – except of the charts API.

Daniel

Von: vtkusers-bounces at vtk.org [mailto:vtkusers-bounces at vtk.org] Im Auftrag von Andrew Wiles
Gesendet: Montag, 24. Oktober 2011 20:58
An: vtkusers at vtk.org
Betreff: [vtkusers] Problem with vtkChartXY::SetTitle and vtkAxis::SetTitle

Hello,

I have been using the vtkChartXY in previous release versions for a while now without any problems.  However, I recently upgraded to VTK 5.8 and I having some difficulties.  I am wondering if it has anything to do with the vtkChartXY::SetTitle being changed from a "const char* title" to a "const vtkStdString &title" -- but I am just guessing.

At any rate, I create the vtkChartXY using a vtkSmartPointer and the axis get their titles initialized to "X Axis" and "Y Axis" without any difficulties.  However, when I go to change the Axis titles or the chart title to something useful, I get an unhandled exception: access violation.  I tried to change the input from a quoted string to an actual vtkStdString but it crashes as well.  I saw a post online (http://vtk.org/pipermail/vtkusers/2011-May/116473.html) that this is due to mismatched build types, but I build VTK with RelWithDebInfo and my project is build with RelWithDebInfo.

I am working with VTK 5.8 Release Tag, on Windows XP 32Bit and using MSVC2010 and Qt 4.7.2.

Here is my code:

   In Header:
    vtkSmartPointer<vtkChartXY> m_Chart;

    In Source:
  m_Chart = vtkSmartPointer<vtkChartXY>::New();

  m_Chart->SetShowLegend(true);

  //const vtkStdString xAxisLabel = "Index";
  //m_Chart->GetAxis(vtkAxis::BOTTOM)->SetTitle(xAxisLabel);
  m_Chart->GetAxis(vtkAxis::BOTTOM)->SetTitle("Index");
  //const vtkStdString yAxisLabel = "Position (mm)";
  //m_Chart->GetAxis(vtkAxis::LEFT)->SetTitle(yAxisLabel);
  m_Chart->GetAxis(vtkAxis::LEFT)->SetTitle("Position (mm)");

  if( this->getName().isEmpty() )  // Note: getName() returns a QString
  {
    const vtkStdString title = "Position Data";
    m_Chart->SetTitle(title);
  }
  else
  {
    const vtkStdString title = "Position Data - " + this->getName().toStdString();
    m_Chart->SetTitle(title);
  }

Any help is appreciated!

Thanks.
Andrew



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