egui_test.rs

use eframe::egui;

fn main() -> Result<(), eframe::Error> {
    let options = eframe::NativeOptions {
        drag_and_drop_support: true,
        initial_window_size: Some(egui::vec2(320.0, 240.0)),
        ..Default::default()
    };
    eframe::run_native(
        "Native file dialogs and drag-and-drop files",
        options,
        Box::new(|_cc| Box::<MyApp>::default()),
    )
}

#[derive(Default)]
struct MyApp {
    input1: String,
    input2: String,
    age: u32,
    frame: u64,
    widget_order: bool,
}

impl eframe::App for MyApp {
    fn update(&mut self, ctx: &egui::Context, _frame: &mut eframe::Frame) {
        egui::CentralPanel::default().show(ctx, |ui| {
            if self.frame % 100 == 0 {
                self.widget_order = !self.widget_order;
            }

            ui.heading("My egui Application");
            ui.horizontal(|ui| {
                if self.widget_order {
                    let id1 = ui.text_edit_singleline(&mut self.input1).id;
                    let id2 = ui.text_edit_singleline(&mut self.input2).id;
                    dbg!((id1, id2));
                } else {
                    let id2 = ui.text_edit_singleline(&mut self.input2).id;
                    let id1 = ui.text_edit_singleline(&mut self.input1).id;
                    dbg!((id1, id2));
                }
            });

            ui.add(egui::Slider::new(&mut self.age, 0..=120).text("age"));
            if ui.button("Click each year").clicked() {
                self.age += 1;
            }
            ui.label(format!("input1 = {}, input2 = {}", self.input1, self.input2));

            self.frame += 1;

            dbg!(self.frame);
        });
    }
}