using member functions as callback for Gtk::TreeModelFilter

[danielrichter <danielrichter2008 yahoo de>]

Hello,

I'm creating a little program with a filtered listStore and a combobox to
choose the filter.

I have found the Gtk::TreeModelFilter, which allows exactly what I need. In
this time I use a static callback function for sorting. The problem is, that
I need data, which are stored on my List object, which is derived from a
ListView. To access the data, I have to assign a member function, but I
don't know how I can do that.

What can I give a member function to set_visible_func()?

At the moment I use a workaround, which assigns a pointer to the object as
static member to the class, but this doesn't seem to be a clear solution.

Hope anyone can help me.
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