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// Monitor.cs - gnome_vfs_monitor_* bindings.
//
// Authors: Jeroen Zwartepoorte <jeroen@xs4all.nl>
//
// Copyright (c) 2004 Jeroen Zwartepoorte
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of version 2 of the Lesser GNU General
// Public License as published by the Free Software Foundation.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this program; if not, write to the
// Free Software Foundation, Inc., 59 Temple Place - Suite 330,
// Boston, MA 02111-1307, USA.
using System;
using System.Runtime.InteropServices;
namespace Gnome.Vfs {
public delegate void MonitorHandler (string monitor, string uri);
internal delegate void MonitorCallback (string monitorUri, string uri, MonitorEventType eventType);
internal delegate void MonitorCallbackNative (IntPtr handle, string monitorUri, string uri, MonitorEventType eventType, IntPtr data);
internal class MonitorCallbackWrapper : GLib.DelegateWrapper {
public void NativeCallback (IntPtr handle, string monitorUri, string uri, MonitorEventType eventType, IntPtr data)
{
_managed (monitorUri, uri, eventType);
}
internal MonitorCallbackNative NativeDelegate;
protected MonitorCallback _managed;
public MonitorCallbackWrapper (MonitorCallback managed, object o) : base (o)
{
NativeDelegate = new MonitorCallbackNative (NativeCallback);
_managed = managed;
}
}
internal enum MonitorEventType {
Changed,
Deleted,
Startexecuting,
Stopexecuting,
Created,
MetadataChanged,
}
public class Monitor {
private IntPtr handle;
private MonitorCallbackWrapper wrapper;
public event MonitorHandler Changed;
public event MonitorHandler Deleted;
public event MonitorHandler Startexecuting;
public event MonitorHandler Stopexecuting;
public event MonitorHandler Created;
public event MonitorHandler MetadataChanged;
public Monitor ()
{
}
[DllImport ("gnomevfs-2")]
private static extern Result gnome_vfs_monitor_add (out IntPtr handle, string uri, MonitorType type, MonitorCallbackNative callback, IntPtr user_data);
public Result Add (string uri, MonitorType type)
{
handle = IntPtr.Zero;
if (wrapper == null)
wrapper = new MonitorCallbackWrapper (new MonitorCallback (OnMonitorEvent), null);
Result result = gnome_vfs_monitor_add (out handle, uri, type, wrapper.NativeDelegate, IntPtr.Zero);
return result;
}
[DllImport ("gnomevfs-2")]
private static extern Result gnome_vfs_monitor_cancel (IntPtr handle);
public Result Cancel ()
{
if (handle == IntPtr.Zero)
throw new InvalidOperationException ("Nothing to cancel");
return gnome_vfs_monitor_cancel (handle);
}
private void OnMonitorEvent (string monitorUri, string uri, MonitorEventType eventType)
{
MonitorHandler handler = null;
switch (eventType) {
case MonitorEventType.Changed:
handler = Changed;
break;
case MonitorEventType.Deleted:
handler = Deleted;
break;
case MonitorEventType.Startexecuting:
handler = Startexecuting;
break;
case MonitorEventType.Stopexecuting:
handler = Stopexecuting;
break;
case MonitorEventType.Created:
handler = Created;
break;
case MonitorEventType.MetadataChanged:
handler = MetadataChanged;
break;
}
if (handler != null)
handler (monitorUri, uri);
}
}
}