104 lines
2.8 KiB
C#
104 lines
2.8 KiB
C#
//
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// Monitor.cs: Class wrapping the gnome_vfs_monitor_* methods.
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//
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// Author:
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// Jeroen Zwartepoorte <jeroen@xs4all.nl>
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//
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// (C) Copyright Jeroen Zwartepoorte 2004
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//
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using System;
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using System.Runtime.InteropServices;
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namespace Gnome.Vfs {
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public delegate void MonitorHandler (string monitor, string uri);
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internal delegate void MonitorCallback (string monitorUri, string uri, MonitorEventType eventType);
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internal delegate void MonitorCallbackNative (IntPtr handle, string monitorUri, string uri, MonitorEventType eventType, IntPtr data);
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internal class MonitorCallbackWrapper : GLib.DelegateWrapper {
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public void NativeCallback (IntPtr handle, string monitorUri, string uri, MonitorEventType eventType, IntPtr data)
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{
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_managed (monitorUri, uri, eventType);
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}
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internal MonitorCallbackNative NativeDelegate;
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protected MonitorCallback _managed;
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public MonitorCallbackWrapper (MonitorCallback managed, object o) : base (o)
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{
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NativeDelegate = new MonitorCallbackNative (NativeCallback);
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_managed = managed;
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}
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}
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public class Monitor {
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private IntPtr handle;
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private MonitorCallbackWrapper wrapper;
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public event MonitorHandler Changed;
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public event MonitorHandler Deleted;
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public event MonitorHandler Startexecuting;
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public event MonitorHandler Stopexecuting;
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public event MonitorHandler Created;
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public event MonitorHandler MetadataChanged;
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public Monitor ()
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{
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}
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[DllImport ("gnomevfs-2")]
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private static extern Result gnome_vfs_monitor_add (out IntPtr handle, string uri, MonitorType type, MonitorCallbackNative callback, IntPtr user_data);
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public Result Add (string uri, MonitorType type)
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{
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handle = IntPtr.Zero;
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if (wrapper == null)
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wrapper = new MonitorCallbackWrapper (new MonitorCallback (OnMonitorEvent), null);
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Result result = gnome_vfs_monitor_add (out handle, uri, type, wrapper.NativeDelegate, IntPtr.Zero);
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return result;
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}
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[DllImport ("gnomevfs-2")]
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private static extern Result gnome_vfs_monitor_cancel (IntPtr handle);
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public Result Cancel ()
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{
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if (handle == IntPtr.Zero)
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throw new InvalidOperationException ("Nothing to cancel");
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return gnome_vfs_monitor_cancel (handle);
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}
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private void OnMonitorEvent (string monitorUri, string uri, MonitorEventType eventType)
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{
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MonitorHandler handler = null;
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switch (eventType) {
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case MonitorEventType.Changed:
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handler = Changed;
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break;
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case MonitorEventType.Deleted:
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handler = Deleted;
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break;
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case MonitorEventType.Startexecuting:
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handler = Startexecuting;
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break;
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case MonitorEventType.Stopexecuting:
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handler = Stopexecuting;
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break;
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case MonitorEventType.Created:
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handler = Created;
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break;
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case MonitorEventType.MetadataChanged:
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handler = MetadataChanged;
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break;
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}
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if (handler != null)
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handler (monitorUri, uri);
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}
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}
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}
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