Possible bug in gtk or gtkmm?

[Andreas Volz <lists brachttal net>]

Hello,

I've a problem here with an IconView on two different systems. On my
Gentoo system the IconView behaves like normal, but on Ubuntu it
behaves bad. I'll insert the exact version numbers below.

I use this code to add images to an IconView:

class IconBrowser : public Gtk::IconView
{
....
  class IconModelColumns : public Gtk::TreeModel::ColumnRecord
  {
  public:

    IconModelColumns()
    {
      add (m_col_filename);
      add (m_col_description);
      add (m_col_url);
      add (m_col_pixbuf);
    }

    // TODO: save Url or Link instead of all this data
    Gtk::TreeModelColumn<std::string> m_col_filename;
    Gtk::TreeModelColumn<Glib::ustring>  m_col_description;
    Gtk::TreeModelColumn<Glib::RefPtr<Gdk::Pixbuf> > m_col_pixbuf;
    Gtk::TreeModelColumn<Glib::ustring> m_col_url;
  };
...
  Glib::RefPtr<Gtk::ListStore> m_refListModel;
  IconModelColumns m_IconColum
}

void IconBrowser::createTree ()
{
  // Create the Tree model:
  m_refListModel = Gtk::ListStore::create( m_IconColumns );
  set_model (m_refListModel);
  set_markup_column (m_IconColumns.m_col_description);
  set_pixbuf_column (m_IconColumns.m_col_pixbuf);
}

void IconBrowser::addIconEntry (const std::string& filename,
                                const Glib::ustring& description,
                                const string& href, int width, int
height) {
  if (m_refListModel)
  {
    try
    {
      Gtk::TreeModel::Row row = *(m_refListModel->append());
      row[m_IconColumns.m_col_filename] = filename;
      row[m_IconColumns.m_col_description] = description;
      row[m_IconColumns.m_col_url] = href;
      
      Glib::RefPtr<Gdk::Pixbuf> pixbuf_ptr =
Gdk::Pixbuf::create_from_file(filename, width, height);
row[m_IconColumns.m_col_pixbuf] = pixbuf_ptr; }
    catch (Gdk::PixbufError)
    {
      // ignore this exception currently
    }
    catch (Glib::FileError)
    {
      // ignore this exception currently
    }
  }
  else
  {
    cerr << " m_refListModel == NULL" << endl;
  }
}

void IconBrowser::showFileList (const list<Link*> *ll)
{    
  // why is that needed to shadow m_cache?
  Global &global = Global::instance ();
  Cache *m_cache = global.getCache ();
  
  clear (); // delete list before loading new one
  
  for (list<Link*>::const_iterator ll_it = ll->begin ();
       ll_it != ll->end ();
       ++ll_it)
  {
    const Link *lnk = *ll_it;
    string image = lnk->getImage ().getUrl ();
    string href = lnk->getHref ().getUrl ();
    
    string fullPath;
    m_cache->urlToFile (Url (image), fullPath);
      
    // TODO: better check for image while parsing
    if (Filter::isImage (fullPath))
    {
      addIconEntry (fullPath, Glib::path_get_basename (fullPath), href,
128, 128); }
    
  }
}

void IconBrowser::showImage (const string &url)
{
  Global &global = Global::instance ();
  Cache *m_cache = global.getCache ();
  
  clear (); // delete list before loading new one
  
  string outFile;
  m_cache->urlToFile (url, outFile);
  
  // TODO: better check for image while parsing
  if (Filter::isImage (outFile))
  {
    addIconEntry (outFile, Glib::path_get_basename (outFile), url);
  }
}


The problem is that after adding a image with showImage() in a big
size. If then showFileList () is called again the images are good, but
the the "invisible frame" around each image and text below is as big as
the big image I added before. So it looks like as there's only one
single column of images.

I hope I explained the problem good enough. If not I'll provide some
screenshots.

Any ideas why this happens and how to solve it?

Gentoo:
x11-libs/gtk+-2.10.14
dev-cpp/gtkmm-2.10.10

Ubuntu:
libgtk2 2.12.0-1ubuntu3 (gutsy)
libgtkmm-2.4-1c2a 1:2.12.0-0ubuntu1 (gutsy)

regards
Andreas