Updating the contents of a treemodel from another thread.

[Bartosz Kostrzewa <zoombat runbox com>]

Hi,

I'm sure this question has been asked at least a million times but I
couldn't deduce the solution to it from any of the documents I've found.

I have an iconview which is populated with hundreds of thumbnails which
 takes a lot of time so I wanted to do it in a separate thread. However,
the iconview ends up with one element and segfaults if I click anywhere
outside of that one element.

I can access the elements of the treemodel just fine even while the
populate thread is doing its job.

Are there any docs on doing something similar? Or perhaps a gtkmm app
that does something like that?

In the constructor of the widget holding the iconview I do the following:

Glib::Thread* const thread = Glib::Thread::create(
	sigc::mem_fun(*this,&CPrintPreviewWidget::populate_iconview),
	false);

and populate_iconview looks like so:

void CPrintPreviewWidget::populate_iconview(void)
{
	std::list<Glib::ustring>::iterator f_iterator =
		image_filelist.begin();

	std::list<Glib::ustring>::iterator f_end = image_filelist.end();
	
	Gtk::TreeModel::iterator iter;
	Gtk::TreeModel::Row row;
	
	while( f_iterator != f_end )
		{
		iter = refImageList->append();
		row = *iter;
		
		row[ ImageListColumns.filenames_column ] =
			Glib::path_get_basename( *f_iterator );
		
		row[ ImageListColumns.thumbnails_column ] =
			Gdk::Pixbuf::create_from_file( *f_iterator,
			 72,
			 72 );
		
		std::cout << "populating: " << *f_iterator << std::endl;
			
		f_iterator++;
		}
	}