Simple windowed application: Difference between revisions

=={{header|Vala}}==

<syntaxhighlight lang="vala">// GTK 4

public class Example : Gtk.Application {

public Example() {

Object(application_id: "my.application",

flags: ApplicationFlags.FLAGS_NONE);

activate.connect(() => {

var window = new Gtk.ApplicationWindow(this);

var box = new Gtk.Box(Gtk.Orientation.VERTICAL, 20);

var label = new Gtk.Label("There have been no clicks yet");

var button = new Gtk.Button.with_label("click me");

var clicks = 0;

button.clicked.connect(() => {

clicks++;

label.label = "Button clicked " + clicks.to_string() + " times";

});

box.append(label);

box.append(button);

window.set_child(box);

window.present();

});

}

public static int main(string[] argv) {

return new Example().run(argv);

}

}</syntaxhighlight>