在Linux (基本操作系统)上的VALA中带有图标、文本和两个按钮的简单对话框

using Gtk;

public class MyDialog : Gtk.Dialog {
    public MyDialog() {
        this.title = "Simple Dialog";
        this.modal = true;
        this.destroy_with_parent = true;
        this.border_width = 10;

        var hbox = new HBox(false, 5);

        var icon = new Image.from_icon_name("dialog-info", IconSize.DIALOG);
        hbox.pack_start(icon, false, false, 0);

        var label = new Label("This is a simple dialog.");
        hbox.pack_start(label, false, false, 0);

        this.vbox.pack_start(hbox, false, false, 0);

        this.add_button("OK", ResponseType.OK);
        this.add_button("Cancel", ResponseType.CANCEL);

        this.show_all();
    }
}

public class Application : Gtk.Window {
    public Application() {
        this.title = "VALA Dialog Example";
        this.set_default_size(200, 100);
        this.destroy.connect(Gtk.main_quit);

        var button = new Button.with_label("Open Dialog");
        button.clicked.connect(on_button_clicked);
        this.add(button);

        this.show_all();
    }

    private void on_button_clicked(Button button) {
        var dialog = new MyDialog();
        dialog.run();
        dialog.destroy();
    }

    public static int main(string[] args) {
        Gtk.init(ref args);

        var app = new Application();
        Gtk.main();

        return 0;
    }
}