In order to learn how to dynamically filter rows on a text view widget
from gtk2hs, I have adapted the FilteDemo from the gtk distribuition.
I want to dynamically change the filter function. The code is
Why does it not work? It fails with the following message when clicking
the button to change the filter:
(MyFilterDemo:21846): Gtk-CRITICAL **: IA__gtk_tree_model_filter_set_visible_func: assertion `filter->priv->visible_method_set == FALSE' failed