help: how to use vtkInteractorStyle::SetLeftButtonPressMethod()
I'm writing a small tool for a very huge program.
througout the whole program there is defined a
vtkInteractorStyleTrackballActor to zoom / pan and rotate images.
Now i want to implement a function that does a pickCallback (it is
called Measure Callback) if you press the left mouse button. For this
purpose i want to use the class vtkInteractorStyleUser to tell the program:
- If the left button ist pressed, do a pickcallback and don't rotate
- All the other functionality of vtkInteractorStyleTrackballActor should
be left unchanged.
I don't understand how to use the method
"vtkInteractorStyle::SetLeftButtonPressMethod(void(*f)(void *), void
*arg)" correctly. what does the call "void(*f)(void *)" mean?
In a former question by someone else i read, that you can only define a
C function, but not a C++ function, is that right?
How must the function void(*f)(void *) look like?
The following is a snippet of my code.
there is only defined an wxVTKRenderWindowInteractor, for interaction
between wxWidgets and VTK. so i did a dynamic_cast to
afterwards i do another dynamic_cast back to
wxVTKRenderWindowInteractor*, and it should work.
My only Problem can be found in the line
*How can i tell the Interactor not to rotate when pressing (and holding
down) the left mouse button, but to do a Measure Callback, as defined in
the last line of this few lines
With the following commented line it is possible to do a Callback with
the left mouse button, but the image will also be rotated, if you don't
have calm fingers.....