[vtkusers] Give keyboard focus to a QVTKWidget without "touching" it

[Jesús Spí­nola]

Hi,

I have an application with a main "2D View" based upon a QVTKWidget and I
would like to handle keyboard events to control the interaction.
My problem is that I must click over this QVTKWidget to be aware of the
keyboard events, because until you click, you don't have keyboard focus.
To avoid this "first-click-to-get-keyboard-focus", I tried to call
QVTKWidget->setFocus() (inherited from QWidget), which seems to be the
trivial solution, but It does nothing and I have to click the QVTKWidget
still to get the focus. I also tried invoking some vtk events, like
*ButtonPressEvent, but with no succeess.

Maybe I'm missing something or I'm trying to do something impossible, I
don't know, but it would be nice if someone can give me some hint to find
out what I'm doing wrong.

So, how can I get the focus automatically?

Thanks in advance!
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