combobox - Rustのgtk-rsバインディングでListStore内にListStoreを追加するには?

Question

gtk-rs bindingsを使用して es をTreeView含むプログラムを作成したいと考えています。ComboBox

のデータを取得するにはGtkCellRendererComboが必要ですが、の中GtkTreeModel *に を追加する方法がわかりません。ListStoreListStore

今のところ、私は単純なものしか持っていませんTreeView。ComboBox内側の 1 列 (ヘッダー "f64")が必要です。

extern crate gtk;

use gtk::prelude::*;
use gtk::{ComboBox, ListStore, Orientation, TreeView, TreeViewColumn, Window, WindowType};

fn main() {
    gtk::init().expect("Failed to initialize GTK");
    let window = Window::new(WindowType::Toplevel);
    window.set_position(gtk::WindowPosition::Center);
    window.set_title("Rust&GTK+3");
    window.set_position(gtk::WindowPosition::Center);
    window.connect_delete_event(|wind, _| {
        let (szerokosc, wysokosc) = wind.get_size();
        println!("Width {} Height {}", szerokosc, wysokosc);
        // Stop the main loop.
        gtk::main_quit();
        // Let the default handler destroy the window.
        Inhibit(false)
    });
    let main_box = gtk::Box::new(Orientation::Vertical, 0);
    let view_list = TreeView::new();
    {
        let types_inside_columns = &[gtk::Type::U32, gtk::Type::F64];
        let model_list_of_data = ListStore::new(types_inside_columns);
        for liczba in 0..10 {
            let array_of_data = [&(liczba.to_value()) as &ToValue,
                                 &((liczba as f64 * 1.5).to_value()) as &ToValue];
            model_list_of_data.insert_with_values(None, &[0, 1], &array_of_data);
        }
        view_list.set_model(Some(&model_list_of_data));
        let object_to_render_cells: gtk::CellRendererText = gtk::CellRendererText::new();
        object_to_render_cells.set_visible(true);
        let view_column = TreeViewColumn::new();
        view_column.set_expand(true);
        view_column.set_visible(true);
        view_column.set_title("u32");
        view_column.pack_start(&object_to_render_cells, true);
        view_column.add_attribute(&object_to_render_cells, "text", 0);
        view_list.append_column(&view_column);
        // second column
        let object_to_render_cells_2: gtk::CellRendererText = gtk::CellRendererText::new();
        object_to_render_cells_2.set_visible(true);
        let view_column_2 = TreeViewColumn::new();
        view_column_2.set_expand(true);
        view_column_2.set_visible(true);
        view_column_2.set_title("f64");
        view_column_2.pack_start(&object_to_render_cells, true);
        view_column_2.add_attribute(&object_to_render_cells, "text", 1);
        view_list.append_column(&view_column_2);
    }
    view_list.expand_all();
    main_box.add(&view_list);
    window.add(&main_box);
    window.show_all();
    gtk::main();
}

に追加してから、ボックス化されたを に追加しようとしgtk::Type:BaseBoxedましたが、メソッドによってtypeに正常に変換できません。types_inside_columnsListStorearray_of_dataBoxto_value()ToValue

追加: このプログラムは実行時にパニックを起こします:

extern crate gtk;
use gtk::prelude::*;
use gtk::{ComboBox, ListStore, Orientation, TreeView, TreeViewColumn, Window, WindowType};


fn main()
{
    gtk::init().expect("Failed to initialize GTK");
    let window = Window::new(WindowType::Toplevel);
    window.set_position(gtk::WindowPosition::Center);    
    window.set_title("Rust&GTK+3");
    window.set_position(gtk::WindowPosition::Center);
    window.connect_delete_event(|wind, _| {
        let (szerokosc,wysokosc) =  wind.get_size();
        println!("Width {} Height {}",szerokosc,wysokosc);
        // Stop the main loop.
        gtk::main_quit();
        // Let the default handler destroy the window.
        Inhibit(false)
    });
    let main_box = gtk::Box::new(Orientation::Vertical,0);
    let view_list = TreeView::new();
    {
        let types_inside_columns = &[gtk::Type::U32,gtk::Type::F64,gtk::Type::Pointer];
        let model_list_of_data = ListStore::new(types_inside_columns);
        for liczba in 0..10 {
            let model_for_combo = ListStore::new(types_inside_columns);
            let array_of_data = [&(liczba.to_value()) as &ToValue,
            &((liczba as f64 * 1.5).to_value()) as &ToValue,
            ];
            let typ_iter = model_list_of_data.insert_with_values(None,&[0,1],&array_of_data);
            model_list_of_data.set_value(&typ_iter,2, &model_for_combo.to_value() as &gtk::Value);
        }
        view_list.set_model(Some(&model_list_of_data));
        let object_to_render_cells : gtk::CellRendererText = gtk::CellRendererText::new();
        object_to_render_cells.set_visible(true);
        let view_column= TreeViewColumn::new();
        view_column.set_expand(true);
        view_column.set_visible(true);
        view_column.set_title("u32");
        view_column.pack_start(&object_to_render_cells,true);
        view_column.add_attribute(&object_to_render_cells,"text",0);
        view_list.append_column(&view_column);
        //second column
        let object_to_render_cells_2 : gtk::CellRendererCombo = gtk::CellRendererCombo::new();
        let view_column_2 = TreeViewColumn::new();
        view_column_2.set_expand(true);
        view_column_2.set_visible(true);
        view_column_2.set_title("f64");
        view_column_2.pack_start(&object_to_render_cells_2,true);
        view_column_2.add_attribute(&object_to_render_cells_2,"text",1);
        view_list.append_column(&view_column_2);
    }
    view_list.expand_all();
    main_box.add(&view_list);
    window.add(&main_box);
    window.show_all();
    gtk::main();
}