I'm taking the liberty of forwarding Klaus' reply to preserve it for
posterity, it was most helpful! Hope that's ok with you.
Danke Klaus!
I've almost got it to work. Now I just need to bite through the mutex
thing and I'm good to go as right now I get a segfault and not all
thumbnails are loaded properly.
Impressively, the code is only about 300 lines which says something very
good about gtkmm :)
When I'm done with this I'll try to produce an example on how to
populate an iconview in a separate thread because what I got turns out
to be quite general.
>> What a shame, so I actually need to understand the dispatcher example
>> > fully... was hoping there'd be an easy solution to this :)
>> >
>> >
>
> There might be an easier way, but my way you could use a class like this:
>
>
> class ThreadThumbs : public sigc::trackable
> {
> public:
> virtual ~ThreadThumbs();
>
> void launch();
> void join();
>
> Glib::Dispatcher& signal_new_thumbs_ready(); // connect add thumbs
> function
>
> _PointerToPixbuf_ get_next_thumb_(); // use mutex, return 0 when queue
> empty
>
> private:
> Glib::Thread* thread_;
> Glib::Dispatcher signal_new_thumbs_ready_;
>
> void add_thumb_to_view();
> void thread_function_create_thumbs(); // create thumbs , add to queue
> (mutex), call signal_new_thumbs_ready_.emit()
>
> GLib::Mutex thumbs_mutex_
> std::queue<_PointerToPixbuf_> thumbs_
> };
>
>
> Just add an instance to your widget class and the dispatcher will
> automatically integrate with your GUI thread.
>
> Regards,
> Klaus
>
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