hashing table rows

["Stephane Mas" <stephane_mas hotmail com>]

Hi,

I'm making a gtk 2.0 table, and want to be able to associate table rows with 
function pointers. A table row may have children, may be removed, and will 
have zero or more functions associated with it. The idea is to have a a 
dynamic right click menu, so that when a row is right clicked, one could see 
which functions are associated with that row, and select one of these 
functions. I want to have the function:
add_right_click_menu_item(GtkTreeIter row, char * func_display_name, 
*callback, void *params_struct);
The first param is the row in question, the second is the name that will 
appear on the right click menu, the third is a pointer to the function to be 
called, and the fourth is a struct of arguments.
Can anybody suggest a good way to do this?  I was thinking about using a 
GHashTable, with a GtkTreeIter as the key, and a linked list of pointers to 
the associated functions. When I recieve a right click event, I will look at 
the associated callbacks and build a menu. Can anybody tell me if this is a 
good way to do it? If so, can I use GtkTreeIters like that? Will they stay 
valid if I remove various items from the tree? How can I compare them? If I 
can't use GtkTreeIters, what can I use as the key and how do I compare them?
regards,
Stephane