[vtkusers] Problem with vtkLegendActor with VTK 6 Python Wrappings

[Bill Lorensen]

Try
square.Update()
before you set the entry.



On Sun, Aug 11, 2013 at 7:51 AM, Bill Lorensen <bill.lorensen at gmail.com>wrote:

> Josh,
>
> Looks like a bug to me. I see the same error with this C++ example:
> http://vtk.org/Wiki/VTK/Examples/Cxx/Visualization/Legend
>
> I'll take a look.
>
> Bill
>
>
> On Sun, Aug 11, 2013 at 5:00 AM, Gelman, Joshua <jgelman at decisionvis.com>wrote:
>
>> Before I report this as a bug, I was just curious if anyone else could
>> confirm this or had any other insight.  I'm still not sure if this is a bug
>> or a problem on my end.  Basically, when I try to use vtkLegendActor in
>> Python, I get the following error:
>>
>> ERROR: In ..\..\..\VTKSrc\Filters\General\vtkTransformPolyDataFilter.cxx, line 84 vtkTransformPolyDataFilter (09ED64F8): No input data
>>
>> It doesn't crash my program, but the error shows up in the console as
>> many number of times as self.legend.SetNumberOfEntries(n) is set.  This
>> same error does NOT occur with my build of VTK 5.10.1.
>>
>> Below is a sample program I threw together that generates the error on my
>> end.  Any insight would be greatly appreciated.
>>
>> Many thanks,
>>
>> --Josh
>>
>> #################################
>> import vtk
>>
>> square = vtk.vtkCubeSource()
>> mapper = vtk.vtkPolyDataMapper()
>> mapper.SetInputData(square.GetOutput())
>>
>> legendBox = vtk.vtkLegendBoxActor()
>> legendBox.SetNumberOfEntries(1)
>>
>> legendBox.SetEntry(0, square.GetOutput(), "Test", [1,1,0])
>>
>> ren = vtk.vtkRenderer()
>> renWin = vtk.vtkRenderWindow()
>> renWin.AddRenderer(ren)
>> ren.AddActor(legendBox)
>>
>> iren = vtk.vtkRenderWindowInteractor()
>> iren.SetRenderWindow(renWin);
>>
>> renWin.Render()
>> iren.Start()
>>
>> #################################
>>
>>
>>
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>
>
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