Re: Multiple questions on the treeview

[Jef Driesen <jefdriesen hotmail com>]

Pavlo Korzhyk wrote:
> > I did some testing, and noticed that the selection 'changed' signal is
> > emitted *before* the 'focus_in_event' of the treeview. In my case, this
> > means that when one of the text entries has the focus, and I use the
> > mouse to select another row in the treeview, signals are emitted in this
> > order:
> >
> > on_treeview_selection_changed
> > on_entry_focus_out_event
> > on_treeview_focus_in_event
>
> Did you try catching signal_changed() and signal_editing_done() of the
> text entry?
> They may be fired before selection_changed and will be usefull in your case...

The changed signal of the text entry is fired while editing the text 
entry and thus always before the treeview selection_changed signal can 
happen. So I could use it to update the treeview, but it's not really 
suitable to reformat (or validate) the input.

For example, if the user inputs something like "5.19" or even "5.19abc" 
in an entry that is supposed to be converted to a number with only one 
digit, the treeview will show the correct value "5.2" after the 
conversion, but the the text entry still contains the bad input. I think 
doing the reformatting also in the changed signal handler is a bad idea, 
because that will have side-effects like changing the cursor (which will 
be confusing for the user I think). And won't this create a loop when 
the text is modified inside the signal handler?

The signal_editing_done is only used as part of a treeview, as far as I 
understand from the documentation. I tried it and it does nothing.

In the meantime, I found some other contra-indications for using the 
focus_out_event signal to update the treeview. There are cases when the 
focus is not lost at all. For instance a button with an accelerator can 
be "clicked" without giving it focus first (and thus never loosing the 
focus on the text entry). Of course I can still use the signal for the 
reformatting. But I'll have to find another method to update my 
treeview... Ideas are welcome...