Re: TreeView Multiple Selection

["Andrew E. Makeev" <andrew solvo ru>]

В Втр, 10/04/2007 в 15:02 -0400, Alan Ott пишет:
> Hello,
> 
> So since the TreeView seems to be such a popular topic on this list, I 
> decided I'd throw some of my own TreeView questions in.
> 
> I want to make the items in the list "click on" and "click off" as 
> opposed to "click 
> on-but-also-remove-selection-from-the-rest-of-the-items." What I want is 
> the selection to act as though it were in SELECTION_MULTIPLE mode with 
> the control key held down during all the clicks. Of course without the 
> control key having to be held down all the time.
> 
> In Gtk::SelectionMode, we seem to have None, Single, Browse, Multiple, 
> and Extended. None of these seem to do what I'm looking for, and I can't 
> quite tell what the difference is between Multiple and Extended.
> 
> Then there's TreeSelection::on_select_function(). It seems to be in the 
> right direction, but I don't see how this function can help me. Maybe 
> I'm misunderstanding it. To use this function, I would want to return 
> true on the row that was clicked, and false on all other rows. The 
> problem is that the select function seems to get called for _every_ row 
> that's affected by a user interaction (click, keypress, etc), so I have 
> no way of knowing which row was the one clicked (because that's the 
> _only_ row that I want to change if I were to go this route).
> 
> So I'm kind of stumped here. I feel like there's probably something easy 
> that I've missed. Any help is appreciated.

You should go another way, I guess.
Connect to signal_button_press_event on Gtk::TreeView widget, then
manage selection by yourself. Don't forget to pass after = false.

Inside that callback you will have mouse coordinates, so, could
determine Gtk::TreePath, then just add or remove that from Selection
object, and return true from event handler.

Regards,
-andrew