Gtk::Label::set_text() definitely causes a redraw of the label in
question. Gtk::Table::attach() will probably cause an immediate redraw of
the Table in question as well as the new child. You should check your code
for GUI calls from a non-main thread.
2008/6/18 Germán Diago <[EMAIL PROTECTED]>:
> Hello. I'm trying to draw the GUI in gtkmm through a dispatcher, since
> I cannot do it from multiple threads.
> The program behaves strangely. Sometimes it shows the images, others
> get stuck and other it does not show
> the table at all.
>
> I have multiple threads that calculate thumbnails of images. The
> program creates a Table to contain the images.
> Once an image is available (which is calculated by worker threads) , a
> signal containing the image is sent from that thread
> so that it can be put inside the table. Inside the slot Ithat handles
> a new thumbnail available I attach the image to the table and then
> call the dispatcher(),
> which calls show_all().
> Is this correct?
>
> The (simplified) code is something like this:
>
> class GUI : public Gtk::Window
> {
> private:
> Glib::Dispatcher d_;
> Gtk::Table * table_;
> Gtk::Button buttonprocessimages_;
> Gtk::Label l_;
> ThreadPool & pool_;
>
> void onImageAvailable(...)
> {
> table_->attach(*img, row, col,...);
> d_();
>
> }
>
> void redraw()
> {
> show_all();
> }
> void processImages()
> {
> table_ = Gtk::Manage(new Gtk::Table(........
> pool_.set_max_threads(n);
> send_work_to_process...
> label_.set_text("");
>
> buttonprocessimages_.set_sensitive(false);
> }
> public:
> GUI(Glib::ThreadPool & pool) : pool_(pool)
> {
> buttonprocessimages_.connect(sigc::mem_fun(*this,
> &GUI::processImages));
> signal_image_available.connect(sigc::mem_fun(*this,
> &GUI::onImageAvailable));
> d_.connect(sigc::mem_fun(*this, &GUI::redraw));
>
> }
> };
>
>
> int main(int argc, char * argv[])
> {
> Gtk::Main m(argc, argv);
> Glib::thread_init();
>
> Glib::ThreadPool pool;
>
> GUI gui(pool);
> pool_.set_max_threads(2);
>
> Gtk::Main::run(gui);
>
> return 0;
> }
>
> Can help, please? Maybe I'm drawing implicitly when I use
> label.set_text() or table_.attach() from a non-GUI thread?
> Thanks for you time.
> _______________________________________________
> gtkmm-list mailing list
> gtkmm-list@gnome.org
> http://mail.gnome.org/mailman/listinfo/gtkmm-list
>
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