如何使用gtk-rs在列表存储/树视图中右对齐数字数据

[dependencies]
gtk = "0.9"

use gtk::prelude::*;
use gtk::{ListStore, TreeView, TreeViewColumn};

fn create_tree_view() -> TreeView {
    let list_store = ListStore::new(&[u32::static_type(), String::static_type()]);
    let tree_view = TreeView::new_with_model(&list_store);
    
    // 添加列
    let column = TreeViewColumn::new();
    tree_view.append_column(&column);
    
    // 设置列的渲染器
    let cell_renderer = gtk::CellRendererText::new();
    cell_renderer.set_alignment(1.0, 0.5); // 设置右对齐
    column.pack_start(&cell_renderer, true);
    column.add_attribute(&cell_renderer, "text", 0);
    
    tree_view
}

fn add_data(tree_view: &TreeView, data: Vec<(u32, String)>) {
    let list_store = tree_view.model().unwrap().downcast::<ListStore>().unwrap();
    
    for (number, text) in data {
        let row = list_store.append();
        list_store.set(&row, &[0, 1], &[&number, &text]);
    }
}

use gtk::{Application, ApplicationWindow};

fn main() {
    let app = Application::new(Some("com.example.app"), Default::default()).expect("Initialization failed...");
    
    app.connect_activate(|app| {
        let window = ApplicationWindow::new(app);
        window.set_default_size(400, 300);
        
        let tree_view = create_tree_view();
        add_data(&tree_view, vec![(1, "One".to_string()), (2, "Two".to_string())]);
        
        window.add(&tree_view);
        window.show_all();
    });
    
    app.run(&[]);
}