Re: What's next for the meta-data browser

> > Two questions:
> >
> >     1. Do I have to be careful when entry callbacks write to the
> >     XMPModel (or any other model or structure) everytime a user types in
> >     a character (performance wise)?
>
> Usually this is not a problem. But if it turns out to be one (because
> changing the model is expensive), then you might want to delay changes
> to the model. You can do that for example by not connecting to 'changed'
> but instead apply the changes when the dialog is closed. Or you could
> connect to 'activate' and 'leave-notify-event' and apply the change when
> the user presses Enter and when the focus leaves the entry.
>
> >     2. I tried to find out how I can add callbacks to editable tree
> >     items. Those callbacks should update the corresponding fields in the
> >     description tab. E.g someone changes in the advanced tab the title
> >     field. This change should then visible in the description tab and
> >     the title has changed.
> >     What am I looking for, when I want to add callbacks to those tree
> >     columns? A pointer to documentation or some keywords I should look
> >     out for would be helpful.
>
> You want to connect to the 'edited' signal of the GtkCellRendererText
> object that is responsible for rendering the editable cell.