TreeModelFilter as a model for IconView.

["Jorge Cardona" <jorgeecardona gmail com>]

Greetings.

I'm building an application and i use a global TreeStore to store some
elements.I have in a window a Gtk::TreeView and a Gtk::IconView, i
create then two TreeModelFilter, because I want to show just some
elements from my global TreeStore in my Gtk::TreeView and others in
the Gtk::IconView, i can set the Filter to the Gtk::TreeView without
problems, but when i used the same procedure to set the Gtk::IconView
model, well it compile, but in runtime i got this error:

(gtkmodelica:25279): Gtk-CRITICAL **: gtk_icon_view_set_model:
assertion `gtk_tree_model_get_flags (model) &
GTK_TREE_MODEL_LIST_ONLY' failed

I assume that i just can pass to an iconview a list as a model, but
there is a way to create a list model from a filter??

Some code from my application:

Here i set the TreeView model:

	blocks = new Blocks();	

	packages_tree_store = Gtk::TreeModelFilter::create(blocks->tree_store);
	packages_tree_store->set_visible_func(sigc::mem_fun(*blocks,
&Blocks::on_package));
	
	treeview_packages->set_model(packages_tree_store);
	treeview_packages->append_column("Categoria",blocks->model_record->name);	


My global TreeStore is a tree, but when generate the TreeModelFilter
for the iconview i created in base to a node at the last path, so, it
could be used as a list, but i don't know how to tell to gtk that
treat this TreeModelFilter as a list.


void Gui::on_treeview_packages_cursor_changed()
{
	Glib::RefPtr<Gtk::TreeSelection> tree_selection =
treeview_packages->get_selection();
	Gtk::TreeModel::iterator iter = tree_selection->get_selected();
	
	if (iter)
	{
		Gtk::TreeModel::Row row = *iter;
		label_description->set_label(row[blocks->model_record->description]);	
		
		Gtk::TreePath tree_path = Gtk::TreePath(iter);
		blocks_list_store =
Gtk::TreeModelFilter::create(blocks->tree_store,tree_path);
		blocks_list_store->set_visible_func(sigc::mem_fun(*blocks,
&Blocks::on_block));

		iconview_blocks->set_model(blocks_list_store);
		iconview_blocks->set_text_column(blocks->model_record->name);
	}

}


And the definition of block class:

class Blocks
{
public:
	Blocks();

	class Model_Record : public Gtk::TreeModelColumnRecord
	{
	public:
		Model_Record()
		{add(name); add(path); add(description); add(icon); add(is_block);}
		Gtk::TreeModelColumn< Glib::ustring >				name;
		Gtk::TreeModelColumn< Glib::ustring >				path;
		Gtk::TreeModelColumn< Glib::ustring >				description;
		Gtk::TreeModelColumn< Glib::RefPtr< Gdk::Pixbuf > > icon;
		Gtk::TreeModelColumn< bool >						is_block;
	};
	
	

	Model_Record	*model_record;
	Glib::RefPtr< Gtk::TreeStore >	tree_store;
		
	bool on_package(const Gtk::TreeModel::const_iterator& iter)
	{   return  not ((*iter)[model_record->is_block]); }
	
	bool on_block(const Gtk::TreeModel::const_iterator& iter)
	{   return (*iter)[model_record->is_block]; }
	
protected:

private:
	
	gint16  read_blocks(std::vector<Glib::ustring> filename,
Gtk::TreeNodeChildren parent);
	
};

Can i create a TreeModelFilter to be used in an iconview? or i got to
create a new liststore?

Thanks.


-- 
Jorge Eduardo Cardona
jorgeecardona gmail com
jorgeecardona.blogspot.com
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