Re: gtkmm 3.4.0 (gtk 3.4.2) multithread app graphic deterioration

[Giuseppe Penone <giuspen gmail com>]

Many thanks,
Giuseppe.

On Sat, Jul 7, 2012 at 9:14 AM, Kjell Ahlstedt <kjell ahlstedt bredband net> wrote:

I don't know if this is any help, but anyway, have you seen these comments at
http://developer.gnome.org/gdk3/stable/gdk3-Threads.html

-- Unfortunately the above holds with the X11 backend only. With the Win32 backend, GDK calls should not be attempted from multiple threads at all.

-- Before calling gdk_threads_leave() from a thread other than your main thread, you probably want to call gdk_flush() to send all pending commands to the windowing system.

Kjell

2012-07-05 14:52, Giuseppe Penone skrev:

Hi,
I'm writing a multithread app where different threads operate on the graphic.
The non gui threads operate on graphic only after semaphores:

gdk_threads_enter();
OPERATION ON GUI FROM NON GUI THREAD
gdk_threads_leave();

and the gui thread is opened this way:

g_thread_init(NULL);
gdk_threads_init();
Gtk::Main  kit(argc, argv);
...
gdk_threads_enter();
Gtk::Main::run(p_window);
gdk_threads_leave();

After some time the gui starts to deteriorate as in screenshot http://www.freeimagehosting.net/hjltx (label over an icon, columns not expanding...).
I have no clue about what could be wrong since there is no warning/error from the terminal
while in the past when I missed a gdk_threads_enter/gdk_threads_leave I had errors printed and the app crashed.

Can anybody help me to understand where the error could be given the screenshot?
I'm also considering porting the app back to gtkmm2 but since I use glade I'm afraid this will be not that easy.