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

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 . Sample follows.


using System;
using Gtk;

//
// A simple Bin class: a simple container that adds padding.
//
class MyPadder : Bin {
	int pad = 50;
	Widget child;
	
	public MyPadder ()
	{
		// 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 ();
	}
}

Constructor

Protected constructor.

Chain to this constructor if you have not manually registered a native value for your subclass. Constructor Pointer to the C object.

Internal constructor

This is an internal constructor, and should not be used by user code. Property Gtk.Widget

Accesses the one and only child widget of this Bin object.

a Property GLib.GType

GType Property.

a Returns the native value for .