A function to set the properties of a cell instead of just using the
straight mapping between the cell and the model. This is useful for
customizing the cell renderer. For example, a function might get an
integer from the @tree_model, and render it to the “text” attribute of
“cell” by converting it to its written equivalent. This is set by
calling gtk_tree_view_column_set_cell_data_func()
A function to set the properties of a cell instead of just using the straight mapping between the cell and the model. This is useful for customizing the cell renderer. For example, a function might get an integer from the @tree_model, and render it to the “text” attribute of “cell” by converting it to its written equivalent. This is set by calling gtk_tree_view_column_set_cell_data_func()