如何在Gtk-rs中获取选定列的文本

use gtk::prelude::*;
use gtk::{GtkListStoreExt, TreeViewColumnExt, TreeViewExt, CellLayoutExt, TreeModelExt};

fn main() {
    gtk::init().expect("Failed to initialize GTK.");

    // 创建窗口和TreeView
    let window = gtk::Window::new(gtk::WindowType::Toplevel);
    let tree_view = gtk::TreeView::new();

    // 创建数据模型和添加列
    let model = gtk::ListStore::new(&[String::static_type()]);
    tree_view.set_model(Some(&model));
    let column = gtk::TreeViewColumn::new();
    let cell = gtk::CellRendererText::new();
    column.pack_start(&cell, true);
    column.add_attribute(&cell, "text", 0);
    tree_view.append_column(&column);

    // 创建TreeSelection
    let selection = tree_view.get_selection();

    // 选中某行时获取文本
    selection.connect_changed(move |_| {
        let (selected_model, selected_path) = selection.get_selected().unwrap();
        let selected_iter = selected_model.get_iter(&selected_path).unwrap();
        let selected_text: String = selected_model.get_value(&selected_iter, 0).get().unwrap();

        // 打印选中的文本
        println!("Selected text: {}", selected_text);
    });

    // 添加数据到数据模型
    let data = vec!["Item 1", "Item 2", "Item 3"];
    for text in data {
        let row = model.append();
        model.set_value(&row, 0, &text.to_value());
    }

    // 添加TreeView到窗口
    window.add(&tree_view);
    window.show_all();

    // 运行主循环
    gtk::main();
}