[Glade-users] Sending events (somewhat OT)

---- Lukasz Gromotowicz <gromot at gmail.com> wrote: 
Trivial question - do you enable gtk threads in your application and do you
use gdk_thread_enter() and gdk_threads_leave() before accessing TreeView
from the second (USB) thread?

Trivial answer - no.

But seriously, I have since chenged my code so that I don't access the TreeView or any other GTK code from 
the 2nd thread. I now send the data to the 1st thread via a client event. My problem still exists though. I 
still have to move the mouse or press a key to get the data to show up.



2009/3/15 Steve <zephod at cfl.rr.com>

---- Tristan Van Berkom <tristan.van.berkom at gmail.com> wrote:
On Sat, Mar 14, 2009 at 12:28 AM, Steve Blackwell <zephod at cfl.rr.com>
I have written a program using glade 3 that has 2 threads. The main
thread handles user input from the GUI while the second thread monitors
a USB port for input. When data arrives at the USB port, it is
and written to a GtkTreeView widget.

The problem is that the data does not appear in the TreeView until I
move the mouse or press a key. I think that this is because the main
thread controlling the GUI is blocking in gtk_main() until an event
arrives. So I added code to the second thread to send a
GDK_CLIENT_EVENT to the GtkDialog widget that contains the TreeView.

It didn't work.

When you recieve data from your USB in your worker thread; call
g_idle_add() to schedule a one time idle function in the main thread.

From that function - call gtk_widget_queue_draw() on your treeview.

Unfortunately, that didn't work. I get the same results as before - ie the
data is only displayed after a mouse or keyboard event is received. I also
tried g_idle_add_full() and set the priority to G_PRIORITY_HIGH_IDLE but no
luck there either.

Tomorrow I'll think about sending the data back to the UI thread and have
that write to the treeview.


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