Hi there, in an application of mine I have two threads: 1. The main GUI thread and 2. A worker thread The worker thread is created with the boost thread library and does its job in general pretty well. Now I need to listen for a keystroke in the worker thread. Up to now I was using the following function for this: bool key_pressed = fltk::get_key_state(m_keyForward); // m_keyForward is the key to look for If the key is pressed the worker thread should react on this. Everything works fine in windows, but in linux I get the following error: > X I/O error ... and then the application closes. This error occus directly at the call, no key has to be pressed.
Today I read about multithreading support in fltk 2 online: http://www.fltk.org/doc-2.0/html/group__multithreading.html I added fltk::lock() right at the beginning of the main function and now the feedback to a key press is: > X I/O error > pure virtual method called > terminate called without an active exception This error appears not always, it happens that only the "X I/O error" appears. If I now add fltk::lock() and fltk::unlock() around the get_key_state() call (and thus include <fltk/run.h>) the error disappears, but I can't get a display redraw anymore. Even if I put fltk::redraw() and fltk::awake() right before fltk::unlock(). In fact, the application seems to hang in general, like the main thread does not get activated anymore. Do you have an idea what I could be doing wrong or do you know if I am on the correct path ? Thanks in advance, Tom _______________________________________________ fltk mailing list [email protected] http://lists.easysw.com/mailman/listinfo/fltk
