Hints and Tips

• If your program is locking up, make sure you look at the XPending() function.
• If you're starting to think about using multiple threads, stop. You don't need to. Structure your event loop as follows:

  while (1){
  if (XPending(display)){
  	// get and process next even
  }
  //handle animation loop
  //NOTE:  use clock() function defined in time.h.  You should also use the CLOCKS_PER_SEC macro
  // assume clock_t last, current are defined, and that last has been set
  //Also assume that if you decided on 20fps for animation, you calculated at interval of clock ticks, i.e.:
  // clock_t interval = (clock_t)((double)CLOCKS_PER_SEC*0.05);
  current = clock();
  if (current-last > interval){
  	handle animation
  	last = current
  }
  }//while
  
  If you are having problems with keysymbols, try including both X11/keysymdef.h and X11/keysym.h.