AW: [vtkusers] Callback()

[Saeger, Marian]

Hi!

Take a look into the header file - there it says:

[...]
void SetCallback(void (*f)(vtkObject *caller, unsigned long eid, 
                             void *clientdata, void *calldata)) 
[...]
void (*Callback)(vtkObject *, unsigned long, void *, void *); 

It is a pointer to a function with the signature (vtkObject *, unsigned
long, void *, void *), so you may declare your own callback and set it via
SetCallback-method.

Greetings, Marian

-----Ursprüngliche Nachricht-----
Von: Louis Desjardins [mailto:lost_bits1110 at hotmail.com] 
Gesendet: Freitag, 28. Mai 2004 07:30
An: vtkusers at vtk.org
Betreff: [vtkusers] Callback()

Hello

I'm trying to understand the command/observer style

The vtkCallbackCommand class, derived from vtkCommand, has the method 
Execute() which calls a method Callback() (copied and pasted below):

void vtkCallbackCommand::Execute(vtkObject *caller, unsigned long event, 
void *callData)
{
  if (this->Callback)
    {
    this->Callback(caller, event, this->ClientData, callData);
    }
}


Can someone tell me where this Callback() function can be found?? I can't 
find its definition or anything

Thats it for now...

Thanks...

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