Re: weird behavior with TreeModel

[John Taber <jtaber johntaber net>]

Thanks very much for the clear explanations.  It all makes sense now.

Nalin Singal wrote:
> Sorry for breaking up the reply.
>
> Regarding the reorderable columns. When you do
> menuColumns.id.set_reorderable(), you are trying to
> set the column in the treeModel as reoderable. But
> actually the column in the treeView is the one which
> should be reorderable. Remember there are two
> different sets of columns - one in the treemodel and
> one in the treeview which are backed up by the
> treemodel columns. So the columns in the treeview are
> the ones which can be reordered and not the ones in
> the treemodel because reordering is just a view thing.
> So as you are doing the for loop, get the column you
> want to set as reorderable from the treeview and call
> set_reorderable on it.
>
> Hope this helps :)
>
> -Nalin
>
>
> --- John Taber <jtaber johntaber net> wrote:
>
>
> > Has anyone else had problems with TreeModel?
> > 1) If I try to append rows after using
> > TreeModel.clear(), it segfaults.
> > 2) If I try to define a column as reorderable - it
> > does not compile but 
> > if I put it in a loop thru all the columns it
> > compiles okay.
> > 3) I'm getting weird behavior when using a table
> > refresh function 
> > (setListToDisplay) - sometimes the view does not
> > load the data, some 
> > times I get a glibmm memory error.
> >
> > I'm running gtkmm 2.6.1 with gtk 2.6.4 with gcc
> > 3.3.5 on debian sid
> >
> > Here's excerpt of what I've been using - anything
> > wrong in what I'm doing?
> >
> > in .h file:
> >     virtual void menuTreeOnClicked(const
> > Gtk::TreeModel::Path& path,
> >         Gtk::TreeViewColumn* column);
> >     //------ menu tree ----------
> >     class ModelColumns : public
> > Gtk::TreeModel::ColumnRecord {
> >     public:
> >         ModelColumns() {
> >             add(id);
> >             add(name);
> >         }
> >         Gtk::TreeModelColumn<int>id;
> >         Gtk::TreeModelColumn<std::string>name;
> >     };
> >     ModelColumns menuColumns;
> >     Gtk::ScrolledWindow menuWindow;
> >     Gtk::TreeView menuTreeView;
> >     Glib::RefPtr<Gtk::ListStore> menuTreeModel;
> >
> > in .cpp file
> >     //---------- menu tree 
> > -------------------------
> >     menuTreeModel =
> > Gtk::ListStore::create(menuColumns);
> >     menuTreeView.set_model(menuTreeModel);
> >     //Gtk::TreeModel::Row row =
> > *(menuTreeModel->append());
> >     //row[menuColumns.id] = 0;
> >     //row[menuColumns.name] = "";
> >     menuTreeView.append_column("ID",
> > menuColumns.id);
> >     //(menuColumns.id).set_reorderable();
> >     menuTreeView.append_column("Name",
> > menuColumns.name);
> >     for(int i=0;i<2;i++) {
> >         Gtk::TreeView::Column* mColumn =
> > menuTreeView.get_column(i);
> >         mColumn->set_reorderable();
> >     }
> >     menuWindow.set_policy(Gtk::POLICY_AUTOMATIC,
> > Gtk::POLICY_AUTOMATIC);
> >     menuWindow.add(menuTreeView);
> >    
>
> menuTreeView.signal_row_activated().connect(sigc::mem_fun(*this,
>
> >           &LanduseListDialog::menuTreeOnClicked) );
> > .....
> > void
>
> LanduseListDialog::setListToDisplay(std::vector<Data*>data)
>
> > {
> >     if (data.empty()) {return;}
> >     //menuTreeModel.clear();
> >     Gtk::TreeModel::Row row;
> >     for (uint i=0;i<data.size();i++) {
> >         row = *(menuTreeModel->append());
> >         row[menuColumns.id] = data[i]->getid();
> >         row[menuColumns.name] = data[i]->getname();
> >     }
> > }
> >
> >
> > _______________________________________________
> > gtkmm-list mailing list
> > gtkmm-list gnome org
> > http://mail.gnome.org/mailman/listinfo/gtkmm-list
>
>
>
>
> 		
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