Rust code shared from the playground

playground.rs

/**
    Simple example on how to use the nwg template system.
*/

#[macro_use] extern crate native_windows_gui as nwg;

use nwg::{Event, Ui, simple_message, fatal_message, dispatch_events};

/// Custom enums are the preferred way to define ui ids. It's clearer and more extensible than any other types (such as &'str).
#[derive(Debug, Clone, Hash)]
pub enum AppId {
    // Controls
    MainWindow,
    NameInput, 
    HelloButton,
    Label(u8),   // Ids for static controls that won't be referenced in the Ui logic can be shortened this way.

    // Events
    SayHello,

    // Resources
    MainFont,
    TextFont
}

use AppId::*; // Shortcut

nwg_template!(
    head: setup_ui<AppId>,
    controls: [
        (MainWindow, nwg_window!( title="Template Example"; size=(280, 105) )),
        (Label(0), nwg_label!(
             parent=MainWindow;
             
             // Как изменить text= в процессе выполнения программы? 
             // Или хотя бы вначале, присвоить значение переменной, которая будет найдена в fn main(){}?
             text="Your Name: ";
             position=(5,15); size=(80, 25);
             font=Some(TextFont) )),

        (NameInput, nwg_textinput!( 
             parent=MainWindow; 
             position=(85,13); size=(185,22); 
             font=Some(TextFont) )),

        (HelloButton, nwg_button!( 
             parent=MainWindow; 
             text="Hello World!"; 
             position=(5, 45); size=(270, 50); 
             font=Some(MainFont) ))
    ];
    events: [
        (HelloButton, SayHello, Event::Click, |ui,_,_,_| {
            let your_name = nwg_get!(ui; (NameInput, nwg::TextInput));
            simple_message("Hello", &format!("Hello {}!", your_name.get_text()) );
        })
    ];
    resources: [
        (MainFont, nwg_font!(family="Arial"; size=27)),
        (TextFont, nwg_font!(family="Arial"; size=17))
    ];
    values: []
);

fn main() {
    let app: Ui<AppId>;

    match Ui::new() {
        Ok(_app) => { app = _app; },
        Err(e) => { fatal_message("Fatal Error", &format!("{:?}", e) ); }
    }

    if let Err(e) = setup_ui(&app) {
        fatal_message("Fatal Error", &format!("{:?}", e));
    }

    dispatch_events();
}