Hi Paul, Have a look at gtk_key_snooper_install(). Salsaman. http://lives.sourceforge.net https://www.ohloh.net/accounts/salsaman On Sat, Feb 4, 2012 at 12:06, Paul Davis <paul@xxxxxxxxxxxxxxxxxxxxx> wrote: > On Sat, Feb 4, 2012 at 2:30 AM, victor-victor <nadaeck@xxxxxxxxxxx> wrote: >> >> Hello >> >> I know how to grab a single key event with gdk, but I'd like to know how to >> grab a key combination that is *not* using a modifier key. For example I >> would like to grab when 'GDK_KEY_a' and 'GDK_KEY_right' are pressed >> simultaneously. As far as I understand, the GdkEventKey structure allows >> only one key to be grabbed at a time (with or without a modifier key). > > (1) you cannot ever press keys simultaneously. the keyboard is a > physical device that is scanned at a given rate by the keyboard > electronics. one key will always be discovered to be down "first" even > if you could simultaneously depress them. > > (2) given the above, you will get (in the case of a "simultaneous" key > press + release) the following events: > > key press > key press > <gap> > key release > key release > >> In SDL, there is the function SDL_GetKeyState() that gets a snapshot of the >> keyboard state; it returns a pointer to an array; then every key can be >> checked if pressed or not. Is there something similar in GDK? If not how >> could I achieve this? > > there is no similar function available for GTK. > > look into gdk event filters for gdk windows, which will allow you to > catch and handle every single key event no matter what else is done > with it. then use a hash map to store which keys are down, and a > simple api to search it or return the current "down set". > > alternatively, use a state machine approach in a regular pair of key > press/release handlers. before the first press, you're in state > "zero". after the first press, you're in state "one". after the second > press, you're in state "two". then trigger things from the state > transitions rather than the key presses themselves. > > --p > _______________________________________________ > gtk-list mailing list > gtk-list@xxxxxxxxx > http://mail.gnome.org/mailman/listinfo/gtk-list _______________________________________________ gtk-list mailing list gtk-list@xxxxxxxxx http://mail.gnome.org/mailman/listinfo/gtk-list
