Re: [gtkmm] Gtk::TreeView on gtkmm

[Matthew Walton <matthew alledora co uk>]

Susumu Yoshida wrote:
> Hi all,
>
> I am coding a software on glademm and gtkmm.
> If there is someone with knowledge, I would like you to help me.
> I got a problem when I tried to use a Gtk::TreeView.
> I would like to code as below.
> Suppose there is a TreeView like ...
>
> item1   |  item2  |  item3 
> ---------------------------
> entry11 | entry12 | entry13
> entry21 | entry22 | entry23
> entry31 | entry32 | entry33
>
> I would like to distinguish between single-click and double-click.
> When you single-click "entry11", for example , the first row should be 
> just high-lit (not selected, nothing happens but being high-lit).
> When you double-click "entry11", the first row should be selected
> and some operation should be done.
>
> What signal should I connect?
> And what code should I add?
If you connect a signal handler to Gtk::TreeView::signal_row_activated() 
you will catch double-clicks on rows, and also the user pressing enter 
when a row is highlighted. Single click to highlight the row is built in 
behaviour in a Treeview.

The signal handler to connect to signal_row_activated should have a 
prototype like

void handler(const Gtk::TreeModel::Path &, Gtk::TreeViewColumn*)

The TreeModel::Path is a path to the row that was activated (use 
TreeModel::get_iter to get an iterator from that if you need one), and 
the TreeViewColumn is a pointer to the column which was activated (at 
least, I assume so, I've not had cause to use that particular 
functionality before).