[pygtk] Problem with CellRendererToggle

[Pipen]

On 11/18/06, Brian <dol-sen at telus.net> wrote:
> > I have three cell renderers in one column, so the path I get in 'button-clicked'
> > callback is always the same no matter what cell I click in the column.
> > Is there a way to know exactly what whas clicked in the column?
> >
> > I have to check if I'll be able to get cell renderer position boundaries and
> > match it with button-press event x/y position. However it'll be a bit dirty,
> > even if it works.
> >
>
> We use to have the toggle packed into a column like that as well.  If I
> remember correctly clicking anywhere on the row would always toggle the
> toggle.  The other problem we had was that it would not always render
> correctly.  The line spacing was wrong with rows overlapping I think.
>
> Then we added more columns with additional information as well as right
> mouse button popup menus.  I would recommend you separate out the toggle
> into its own column. It will simplify things.  Otherwise I think you
> will have to get mouse pointer coordinates and compute its position on
> your window... until you figure out if it was your toggle it was over.
>

I did it. This is how it works now:

def on_sets_button_press( self, tree, event ):
    if event.type == gtk.gdk.BUTTON_PRESS and event.button in (1, 3):
        pathinfo = tree.get_path_at_pos( int(event.x), int(event.y) )
        if pathinfo is not None and event.button == 1:
            path, col = pathinfo[:2]
            cell = col.get_cell_renderers()[SETS_COL_TOGGLE]    # Toggle cell.
            ctmin = 16 * len(path)               # <- this is the left
toggle boundary.
            ctmax = ctmin + cell.get_size(tree, None)[2]     # <- and
this is right one.
            if ctmin <= event.x < ctmax:    # Toggle cell.
                # <- Toggle current node (and all subnodes).
                return True    # <- do not propagate event (no cursor-changed).
        elif pathinfo is not None and event.button == 3:
            # <- context menu
            return True    # <- same as above.
    return False

TODO:
1. I have to find out what is the width of those treeview expand "thingies".
   That's why I use fixed 16px width.
   http://pu.kielce.pl/~pipen/varez/pygtk-toggle.png
2. I should add column spacing between cells to the result of ctmax.

Here is another way of calculating ctmax (however result slightly differ (2px)):
ctmax = ctmin + col.cell_get_position(cell)[1]

Thanks for your help.

-- 
Artur M. Piwko
AMP29-RIPE