gtk hello3 button

gtk4/hello3/Cargo.toml

@@ -0,0 +1,9 @@
+[package]
+name = "hello2"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+gtk = { version = "0.6.6", package = "gtk4", features = ["v4_8"] }

gtk4/hello3/src/main.rs

@@ -0,0 +1,36 @@
+use gtk::prelude::*;
+use gtk::{glib, Application, ApplicationWindow, Button};
+
+const APP_ID: &str = "com.clonbg.Helloword2";
+
+fn build_ui(app: &Application) {
+    // Create a button with label and margins
+    let button = Button::builder()
+        .label("Press me!")
+        .margin_top(12)
+        .margin_bottom(12)
+        .margin_start(12)
+        .margin_end(12)
+        .build();
+
+    // Connect to "clicked" signal of `button`
+    button.connect_clicked(|button| {
+        // Set the label to "Hello World!" after the button has been clicked on
+        button.set_label("Hello World!");
+    });
+
+    let window = ApplicationWindow::builder()
+        .application(app)
+        .title("Mi aplicacióng gtk")
+        .child(&button)
+        .build();
+
+    // presenta la ventana, será la última orden
+    window.present();
+}
+
+fn main() -> glib::ExitCode {
+    let app = Application::builder().application_id(APP_ID).build();
+    app.connect_activate(build_ui);
+    app.run()
+}