[[:oktatas:programozás:csharp:mono|< Mono]]

====== Gtk ======

A mono segítségével, nem csak Windows.Forms névtérrel állíthatunk elő GUI felületet. Itt rövid bevezetést találunk a Gtk használatára.


Debian GNU/Linux alatt a Gtk# használatához szükség van a gtk-sharp2 csomag telepítésére:
  apt-get install gtk-sharp2


===== Helló Világ =====

<code c#>
using Gtk;
using System;

public class Program
{
    public static void Main()
    {
        Application.Init();

        Window ablak = new Window("Helló Világ");
        ablak.Show();

        Application.Run();
    }
}
</code>

fordítás:
  gmcs -pkg:gtk-sharp-2.0 main.cs


===== Ablak örökléssel =====


<code c#>
using Gtk;
using System;

class Program : Window
{
	Program():base("")
	{		
		DefaultWidth = 300;
		DefaultHeight = 200;
		Show();		
	}
	static void Main()
	{	
		Application.Init ();		
		new Program();		
		Application.Run();	
	}
}
</code>

===== Ablak mérete =====


<code c#>
using Gtk;
using System;

class Program
{
	static void Main()
	{	
		Application.Init ();		
		
		Window ablak = new Window("");
		ablak.DefaultWidth = 300;
		ablak.DefaultHeight = 200;
		ablak.Show();
		
		Application.Run();	

	}
}
</code>


===== Nyomgomb =====


<code c#>
using Gtk;
using System;

class Program
{
	static void Main()
	{	
		Application.Init ();		
		
		Window ablak = new Window("");
		Button kilepesgomb = new Button("Nyomj le");
		kilepesgomb.Clicked += new EventHandler(Kilepesgomb_Clicked);
		ablak.Add(kilepesgomb);
		ablak.ShowAll();
		
		Application.Run();	

	}
	static private void Kilepesgomb_Clicked(object sender, EventArgs e)
	{
		Application.Quit();
	}	
}
</code>


===== Szövegdoboz =====


<code c#>
using Gtk;
using System;

class Program : Window
{

	Entry szovegdoboz = new Entry();
	Program():base("")
	{		
		

		Add(szovegdoboz);
		DefaultWidth = 300;
		DefaultHeight = 200;
		ShowAll();		
	}
	static void Main()
	{	
		Application.Init ();		
		new Program();		
		Application.Run();	
	}
}

</code>

===== Két komponens az ablakon =====


<code c#>
using Gtk;
using System;

class Program : Window
{
	VPaned paned1 = new VPaned();
	Button gomb1 = new Button("Nyomj le");
	Label cimke1 = new Label("Címke");
	Program():base("")
	{		
		
		paned1.Pack1(gomb1, true, false);
		paned1.Pack2(cimke1, true, false);
		
		Add(paned1);
		DefaultWidth = 300;
		DefaultHeight = 200;
		ShowAll();		
	}
	static void Main()
	{	
		Application.Init ();		
		new Program();		
		Application.Run();	
	}
}

</code>


===== Üzenetablak =====


<code c#>
using Gtk;
using System;

class Program : Window
{

	Button gomb1 = new Button("Nyomj meg");
	Program():base("")
	{		
		gomb1.Clicked += new EventHandler(Gomb1_Clicked);

		Add(gomb1);
		DefaultWidth = 300;
		DefaultHeight = 200;
		ShowAll();		
	}
	private void Gomb1_Clicked(object sender, EventArgs e)
	{
		
		MessageDialog msg = new MessageDialog(this, DialogFlags.DestroyWithParent,
			MessageType.Info, ButtonsType.Ok, "Névjegy");
		msg.Run();
		msg.Destroy();
		   
		
	}
	static void Main()
	{	
		Application.Init ();		
		new Program();		
		Application.Run();	
	}
}


</code>


Lekérdezzük melyik gombra kattintott a felhasználó:
<code c#>
using Gtk;
using System;

class Program : Window
{

	Button gomb1 = new Button("Nyomj meg");
	Program():base("")
	{		
		gomb1.Clicked += new EventHandler(Gomb1_Clicked);

		Add(gomb1);
		DefaultWidth = 300;
		DefaultHeight = 200;
		ShowAll();		
	}
	private void Gomb1_Clicked(object sender, EventArgs e)
	{
		
		MessageDialog msg = new MessageDialog(this, DialogFlags.DestroyWithParent,
			MessageType.Info, ButtonsType.YesNo, "Szeretnéd ezt?");
		ResponseType rsp = (ResponseType)msg.Run();
		msg.Destroy();
		   
		if(rsp == ResponseType.Yes)
			Title = "Szeretné";
		else
			Title = "Nem szeretné";
		
	}
	static void Main()
	{	
		Application.Init ();		
		new Program();		
		Application.Run();	
	}
}
</code>

A ButtonType felsorolt típus tagjai:
  * None
  * Ok
  * Close
  * Cancel
  * YesNo
  * OkCancel




===== Menü =====

<code c#>
using Gtk;
using System;

class Program : Window
{

	MenuBar menubar = new MenuBar();
	
	Menu file_menu = new Menu();
	MenuItem file_item = new MenuItem("Fájl");
	MenuItem exit_item = new MenuItem("Kilépés");
	
	Menu help_menu = new Menu();
	MenuItem help_item = new MenuItem("Súgó");
	MenuItem content_item = new MenuItem("Tartalom");
	MenuItem about_item = new MenuItem("Névjegy");
	
	Label label1 = new Label("A menüs program");
	
	VBox box = new VBox(false, 2);
	
	
	Program():base("")
	{		
		
		exit_item.Activated += new EventHandler(Exit_item_Activated);
		file_menu.Append(exit_item);
		file_item.Submenu = file_menu;		
		
		
		content_item.Activated += new EventHandler(Content_item_Activated);
		about_item.Activated += new EventHandler(About_item_Activated);
		help_menu.Append(content_item);
		help_menu.Append(about_item);
		help_item.Submenu = help_menu;
		
		menubar.Append(file_item);
		menubar.Append(help_item);
		
		box.PackStart(menubar, false, false, 0);
		box.PackStart(label1, true, true, 0);

		Add(box);
		DefaultWidth = 300;
		DefaultHeight = 200;
		ShowAll();		
	}
	private void Content_item_Activated(object sender, EventArgs e)
	{
		MessageDialog msg = new MessageDialog(this, DialogFlags.DestroyWithParent,
			MessageType.Info, ButtonsType.Ok, "Tartalom árnyékeljárás");
		msg.Run();
		msg.Destroy();
	}
	private void About_item_Activated(object sender, EventArgs e)
	{
		MessageDialog msg = new MessageDialog(this, DialogFlags.DestroyWithParent,
			MessageType.Info, ButtonsType.Ok, "Névjegy");
		msg.Run();
		msg.Destroy();
	}
	private void Exit_item_Activated(object sender, EventArgs e)
	{
		Application.Quit();
	}
	static void Main()
	{	
		Application.Init ();		
		new Program();		
		Application.Run();	
	}
}
</code>

===== Linkek =====

  * http://www.go-mono.com/docs/