[vtkusers] VTKcallbackcommand passing a class function

[David Doria]

Take a look at this example:
http://www.vtk.org/Wiki/VTK/Examples/Cxx/Interaction/ObserverMemberFunction

It shows how you can use a member function as an observer.

David


David


On Fri, Mar 29, 2013 at 2:38 PM, harshanand <harsha.nyshadham at gmail.com>wrote:

> Hi Guys,
>
> I am new to programming and I am not sure how to fix this.
>
> I have a class GBConnecivity and would like to setup vtkcallback to use
> function from this class.
>
> This is what I am doing:
>
> <.h>
> class GBConnectivityApp
> {
> public:
> void ClickCallbackFunction (vtkObject* caller, long unsigned int eventId,
> void* clientData, void* callData);
> }
>
> <.cpp>
> void GBConnectivityApp::ClickCallbackFunction(vtkObject*
> vtkNotUsed(caller),
> long unsigned int vtkNotUsed(eventId), void* clientData, void*
> vtkNotUsed(callData))
> {
> .................some stuff
> }
>
> I am calling it like this from another function of same
> class(GBConnectivityApp)
>
> vtkSmartPointer<vtkCallbackCommand> clickCallback =
>                 vtkSmartPointer<vtkCallbackCommand>::New();
>
>         clickCallback->SetCallback (ClickCallbackFunction );
>         ui.qvtkWidget->update();
>
> It would  not accept this, I tried GBConnectivityApp::ClickCallbackFunction
> , would not take it. I get the error missing parameters to functions. So I
> pass the parameters to cliclcallbackFunction, it would  not take it too.
>
> What am i doing wrong?
>
> Thanks for the help!!!
>
>
>
>
>
>
> --
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