Hi List,
I'm trying to use the directory monitoring API in gnomevfs, but I'm
having difficulty understanding how it is supposed to be used. The
documentation at
http://library.gnome.org/devel/gnome-vfs-2.0/unstable/gnome-vfs-20-gnome-vfs-monitor.html
doesn't have any examples and I haven't been able to find a simple
example on the web. The API seems simple enough, but I'm not sure I
understand how the callback mechanism is supposed to work. (This
probably reflects a deeper lack of understanding of glib, but I'll
persist...)
For example, I gather this program won't work because there is no GMainLoop in
place to generate the callback:
#include <libgnomevfs/gnome-vfs.h>
int exit=0;
static void MonitorCallback(GnomeVFSMonitorHandle *handle, const gchar
*monitor_uri, const gchar *info_uri, GnomeVFSMonitorEventType
event_type, gpointer user_data)
{
exit=1;
}
int main()
{
if(!gnome_vfs_initialized())
gnome_vfs_init();
GnomeVFSMonitorHandle *h;
gnome_vfs_monitor_add(&h, "/home/myusername", GNOME_VFS_MONITOR_DIRECTORY,
MonitorCallback, NULL);
while(!exit);
gnome_vfs_monitor_cancel(h);
return 0;
}
but something like this should work correctly?
#include <glib.h>
#include <libgnomevfs/gnome-vfs.h>
static void MonitorCallback(GnomeVFSMonitorHandle *handle, const gchar
*monitor_uri, const gchar *info_uri, GnomeVFSMonitorEventType
event_type, gpointer user_data)
{
g_print("Monitor event received, exiting...\n");
g_main_loop_quit((GMainLoop*)user_data);
}
int main()
{
if(!gnome_vfs_initialized())
gnome_vfs_init();
GMainLoop *loop;
loop = g_main_loop_new(NULL, FALSE);
GnomeVFSMonitorHandle *h;
gnome_vfs_monitor_add(&h, "/home/myusername", GNOME_VFS_MONITOR_DIRECTORY,
MonitorCallback, loop);
g_main_loop_run(loop);
gnome_vfs_monitor_cancel(h);
return 0;
}
Can someone can give me an idea of whether the above should work or
what I would need to do to that simple example to get it working?
Looking at the above I don't really understand how glib would know how
to attach the MonitorCallback to the GMainLoop, which isn't even
running yet (if I created and started another main loop inside the outer loop,
would it also generate callbacks?).
thanks,
D
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