[Gtk-sharp-list] TreeView Questions

[Met]

1) What widget/signal to I look for when "editing" a cell in a
TreeView?  I can edit the text, but when I submit it returns to normal. 
This action doesn't surprise me as I'm sure I have to catch which cell
was changed and it's new value.  But, I have no idea what signal to
check for on what widget.

2) How do I get a CellRendererToggle() (check box) to be editable?  It
doesn't appear to work as the CellRendererText() which has a .Editable
property. 

Here's how I create my TreeView() right now.  The above questions relate
directly to this code.
====================================================================
    tableStore = new TreeStore(typeof(bool),
                               typeof(string),
                               typeof(string));

    CellRendererText cell = new CellRendererText();
    cell.Editable = true;

    tableTree.AppendColumn("Gen", new CellRendererToggle(), 0);
    tableTree.AppendColumn("Table", new CellRendererText(), "text", 1);
    tableTree.AppendColumn("Object", cell, "text", 2);
====================================================================

Thanks in advance,

~ Matthew