Re: RecentManager

[Kjell Ahlstedt <kjell ahlstedt bredband net>]

2012-10-31 17:20, g4hx skrev:
> On 10/31/2012 04:50 PM, Kjell Ahlstedt wrote:
> > RecentManager::get_default() gets a RecentManager where all programs can
> > save recently used files. Usually it's not empty. Word processors, text
> > editors and all kinds of programs may have saved names of recently used
> > files there. The information is saved in a file, on my PC in file
> > ~/.local/share/recently-used.xbel. I don't think there's any guarantee
> > that your newly saved file name will be the first one in the vector that
> > RecentManager::get_items() returns, but it should be somewhere in that
> > vector.
> >
> > I'm don't know why you don't find your file name in a FileChooserDialog.
> > Do you use a filter that hides it? Have you looked through the whole
> > list of files in the dialog, and not just the first few entries?
> >
> > Kjell
> >
> > 2012-10-31 14:51, g4hx skrev:
> > > Hello all,
> > >
> > > I am trying to include a RecentManager in my program but so far I am
> > > utterly failing to do it. I have the following code to add a file
> > > obtained by a FileChooserDialog to the recent files list:
> > >
> > >     Glib::RefPtr<RecentManager> mgr = RecentManager::get_default();
> > >
> > >     if(!mgr->add_item(dialog.get_uri()))
> > >       g_warning("Could not add item to recent files");
> > >
> > > If I understand correctly, then a subsequent statement of the type
> > >
> > >     g_warning("%s", mgr->get_items()[0]->get_uri().raw().c_str());
> > >
> > > should return the URI that I passed to the RecentManager. Only this
> > > is not the case, instead the warning prints another file to the
> > > terminal. Also the file does not show up in any FileChooserDialog.
> > > What am I doing wrong?
> > >
> > > g4hx
> Well, I have a filter in all my dialogs which permits only xml files.
> I removed the recently-used.xbel. After that the call to mgr->get_items
> results in a SEGFAULT, since there are no entries at all.
>
> How can I set up a RecentManager for my application only?
>
> g4hx
Gtk::RecentManager::add_item() calls the gtk+ function 
gtk_recent_manager_add_item(). That function always returns true, and 
does most of its job asynchronosly, meaning that when the function 
returns, its job has probably not been finished.
If you call get_items() immediately after add_item(), the newly added 
item might not be included in the returned vector. It's much safer to 
connect to signal_changed() and call get_items() in your signal handler.

The documentation does not mention that add_item() works asynchonously, 
neither the documentation in gtk+ nor in gtkmm.

To set up a RecentManager for your application only, you need to create 
your own RecentManager, i.e. call Gtk::RecentManager::create() instead 
of get_default(). You must set a filename, where your RecentManager 
shall save its information, or else it will use the default file that 
most other programs use. BUT, that does not seem to be possible, using 
Gtk::RecentManager. There is a property_filename(), but it's read-only. 
The property 'filename' in the gtk+ class GtkRecentManager is 
construct-only, meaning it can only be given a value when the object is 
constructed. I think something is missing in gtkmm. 
Gtk::RecentManager::create() should have a 'filename' parameter.

Kjell