Question

With xlib in c++ is there a way to asynchronously handle events? XNextEvent blocks until an event arrives. Is the only way of doing this calling XNextEvent from a different thread? I am aware that XCB is in development and will support concurrency (I think?) but I need to do this with just xlib for education. Thanks 🙂

Answer 1

Check for events with XPending.
It doesn’t block.

while (XPending(dpy))
{
    XEvent ev;
    XNextEvent(dpy, &ev);
    ....
    if (ev.type == KeyPress)
    {
        ....
    }
}