Help-Tutorial-Direct-Intro

Setting up a Project

Before beginning, create a new Gtk# project and add references to the following assemblies:

• TwoLayeredGUI.dll
• TwoLayeredGUI.GtkSharp.dll

Alternatively, you can also install the NuGet package TwoLayeredGUI.GtkSharp; it will automatically add the two mentioned assemblies.

As we are going to try various functions offered by the Two-Layered GUI Toolkit, it is a good idea to structure the main window of the application in a way that it can contain a large number of buttons, menu items, or whichever controls you want to use. For your convenience, here is a code skeleton for such a Gtk# program:

using System;

using Gtk;

namespace Tutorial
{
    class Program
    {
        private static VBox layoutMain;

        private static void AddButton(string title, System.Action action)
        {
            Button btn = Button.NewWithLabel(title);
            layoutMain.PackStart(btn, false, false, 0);
            btn.Clicked += delegate {
                action();
            };
        }

        [STAThread]
        public static void Main(string[] args)
        {
            Application.Init();
            using (Window win = new Window("Tutorial for the Two-Layered GUI Toolkit")) {
                try {
                    win.Hidden += delegate {
                        Application.Quit();
                    };
                    win.WindowPosition = WindowPosition.Center;
                    win.SetSizeRequest(300, 550);

                    layoutMain = new VBox(false, 0);
                    win.Add(layoutMain);

                    // add buttons here by calling AddButton

                    win.ShowAll();
                    Application.Run();
                }
                finally {
                    win.Destroy();
                }
            }
        }
    }
}

With this code, simply call the AddButton method, specify what you are trying and add the method that contains your code, and a button will be inserted on your window.

Lastly, to add a first bit of the Two-Layered GUI Toolkit to our code, add the following two using directives:

using TwoLayeredGUI;
using TwoLayeredGUI.Gtk;

The first namespace is the general root namespace for the Two-Layered GUI Toolkit and contains many of the types that we will use throughout this tutorial. The second namespace is the root namespace for the Gtk# binding; if you use a binding for another GUI toolkit, make sure to replace this with the appropriate namespace.

Now that we're set, we can start displaying some dialog boxes.

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