On 1/16/07, Robert Pearce <[EMAIL PROTECTED]> wrote:
On Tue, 16 Jan 2007, Matt Fischer <[EMAIL PROTECTED]> wrote :
>I believe it's also possible to tell the mainloop about a file
>descriptor which should be watched, and have it call a function
>whenever new data appears. I have never used this tactic (hopefully
>someone else can clarify this)
Yes - the GTK "IO Channel" structure allows this. I have used this
approach to asynchronously monitor incoming data on a serial port, and
it seems to work fairly well. It certainly gave me FAR fewer headaches
than trying to do a similar thing on Windows!
chan = g_io_channel_unix_new ( fd );
g_io_channel_set_encoding ( chan, NULL, &tErrPtr );
EventSrc = g_io_add_watch ( chan, G_IO_IN, ParseRxData, user_data );
Where ParseRxData is the data handler function:
gboolean ParseRxData ( GIOChannel *source,
GIOCondition condition,
gpointer data )
The only oddity I'm left with is that once I've run that GTK
application, the serial port in question just blocks on open for all
other applications, though I can re-run the GTK app without problem.
--
Rob Pearce http://www.bdt-home.demon.co.uk
The contents of this | Windows NT crashed.
message are purely | I am the Blue Screen of Death.
my opinion. Don't | No one hears your screams.
believe a word. |
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Marshall--perhaps it would help if you could provide a little more info on
the nature of the data coming into the dialog. Does it come over a socket,
or a file descriptor from some type of character device, or what? It's
likely that the I/O channel approach Robert describes can be coaxed into
working for your situation. It's certainly better than polling for new data
using an idle handler as I described above (although worst-case scenario,
that would probably be a fairly reliable fallback.)
--Matt
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