GtkSharp/glib/SignalCallback.cs

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// GtkSharp.SignalCallback.cs - Signal callback base class implementation
//
// Authors: Mike Kestner <mkestner@speakeasy.net>
//
// (c) 2001 Mike Kestner
namespace GtkSharp {
using System;
using System.Collections;
using System.Runtime.InteropServices;
using GLib;
/// <summary>
/// SignalCallback Class
/// </summary>
///
/// <remarks>
/// Base Class for GSignal to C# event marshalling.
/// </remarks>
public abstract class SignalCallback : IDisposable {
// A counter used to produce unique keys for instances.
protected static int _NextKey = 0;
// Hashtable containing refs to all current instances.
protected static Hashtable _Instances = new Hashtable ();
// protected instance members
protected GLib.Object _obj;
protected Delegate _handler;
protected int _key;
protected System.Type _argstype;
/// <summary>
/// SignalCallback Constructor
/// </summary>
///
/// <remarks>
/// Initializes instance data.
/// </remarks>
protected SignalCallback (GLib.Object obj, Delegate eh, System.Type argstype)
{
_key = _NextKey++;
_obj = obj;
_handler = eh;
_argstype = argstype;
_Instances [_key] = this;
}
public void AddDelegate (Delegate d)
{
_handler = Delegate.Combine (_handler, d);
}
public void RemoveDelegate (Delegate d)
{
_handler = Delegate.Remove (_handler, d);
}
public void Dispose ()
{
Dispose (true);
GC.SuppressFinalize (this);
}
protected virtual void Dispose (bool disposing)
{
if (disposing) {
_obj = null;
_handler = null;
_argstype = null;
}
}
~SignalCallback ()
{
Dispose (false);
}
}
}