gtk-sharp 0.0.0.0 Gtk# is thread aware, but not thread safe; See the Gtk# Thread Programming for details.

A container with just one child.

A Bin widget is a with just one child. It is used to create subclasses, since it provides common code needed for handling a single child . Many GTK+ widgets are subclasses of Bin, including , , , , and . To place a child widget inside this container, use the standard method. For the widget to be useful, it should participate in size negotiation and size allocation using the events and . Since Gtk.Bin is an abstract class in C, it is necessary to register a Type. Sample follows.


using System;
using Gtk;
using GtkSharp;

//
// A simple Bin class: a simple container that adds padding.
//
class MyPadder : Bin {
	int pad = 50;
	static GLib.Type type;
	Widget child;
	
	static MyPadder ()
	{
	        //
	        // Register the type on the static constructor, so it is
		// available on the instance constructors
		//
		type = RegisterGType (typeof (MyPadder));
	}
	
	public MyPadder () : base (type)
	{
		// To track our child widget.
		Added += new AddedHandler (MyAdded);

		// Participate in size negotiation
		SizeRequested += new SizeRequestedHandler (OnSizeRequested);
		SizeAllocated += new SizeAllocatedHandler (OnSizeAllocated);
	}

	//
	// Invoked to query our size
	//
	void OnSizeRequested (object o, SizeRequestedArgs args)
	{
		if (child != null){
			int width = args.Requisition.width;
			int height = args.Requisition.height;
			
			child.GetSizeRequest (out width, out height);
			if (width == -1 || height == -1)
				width = height = 80;
			SetSizeRequest (width + pad * 2, height + pad * 2);
		} 
		
	}

	//
	// Invoked to propagate our size
	//
	void OnSizeAllocated (object o, SizeAllocatedArgs args)
	{
		if (child != null){
			Gdk.Rectangle mine = args.Allocation;
			Gdk.Rectangle his = mine;

			his.x += pad;
			his.y += pad;
			his.width -= pad * 2;
			his.height -= pad * 2;
			child.SizeAllocate (his);
		}
	}

	//
	// Public property of the Padding widget
	//
	public int Pad {
		get {
			return pad;
		}

		set {
			pad = value;
			QueueResize ();
		}
	}

	void MyAdded (object o, AddedArgs args)
	{
		child = args.Widget;
	}
}

class Y {
	static void Main ()
	{
		Application.Init ();

		Window w = new Window ("Hello");
		MyPadder x = new MyPadder ();
		x.Pad = 100;
		Button b = new Button ("Hola");
		w.Add (x);
		x.Add (b);

		w.ShowAll ();
		
		Application.Run ();
	}
}

Gtk.Container Atk.Implementor GLib.IWrapper GLib.IWrapper System.IDisposable Method System.Void

Disposes the resources associated with the object.

Constructor

Internal constructor

Pointer to the C object. An instance of Bin, wrapping the C object. This is an internal constructor, and should not be used by user code. Property System.UInt32

The GLib Type for Gtk.Bin

The GLib Type for the Gtk.Bin class. Constructor

Internal constructor

GLib type for the type Creates a new instance of Bin, using the GLib-provided type This is a constructor used by derivative types of that would have their own GLib type assigned to it. This is not typically used by C# code.