[vtkusers] Qt + Vtk - Callbacks and signals/slots

[Julien Finet]

Hi,
You should not be deriving from vtkObject AND QObject, it won't work.
In your case, the callback could have a QObject as member variable (the
QVTKWidget?) and call a method on that QObject (which potentially could
fire a signal observed by other QObjects).

Julien.


On Thu, Aug 22, 2013 at 10:22 AM, Anka Kochanowska <pluszcz at gmail.com>wrote:

> Does your class has a
>
> Q_OBJECT
>
> macro included?
>
> Anka
>
>
>
>
>
>
> On Wed, Aug 21, 2013 at 6:09 PM, Jose Ignacio Prieto <
> joseignacio.prieto at gmail.com> wrote:
>
>> Hi all,
>> I think I am not fully understanding callbacks and signals. I have a qt
>> project where the ui loads a vtk renderwindow. That render window has a
>> callback (a box widget that has to update the clipping planes of the
>> vtkvolume). After that I would like that inside the callback it emits a
>> signal and the qvtkwidget then calls its renderwindow and renders all.
>> I couldn't emit a signal, so I made the class mycallback to inherit both
>> from vtkcommand and qobject, and now it doesn't compile showing
>>
>> undefined reference to `vtable for vtkBoxCallback'
>>
>>
>> What should I do?
>> Thanks
>>
>> --
>> José Ignacio Prieto
>> celular(nuevo): 94348182
>>
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