Run the pyglet event loop by processing pending events only. This keeps processing pending events until stdin is ready. After processing all pending events, a call to time.sleep is inserted. This is needed, otherwise, CPU usage is at 100%. This sleep time should be tuned though f
()
| 66 | #----------------------------------------------------------------------------- |
| 67 | |
| 68 | def inputhook_pyglet(): |
| 69 | """Run the pyglet event loop by processing pending events only. |
| 70 | |
| 71 | This keeps processing pending events until stdin is ready. After |
| 72 | processing all pending events, a call to time.sleep is inserted. This is |
| 73 | needed, otherwise, CPU usage is at 100%. This sleep time should be tuned |
| 74 | though for best performance. |
| 75 | """ |
| 76 | # We need to protect against a user pressing Control-C when IPython is |
| 77 | # idle and this is running. We trap KeyboardInterrupt and pass. |
| 78 | try: |
| 79 | t = clock() |
| 80 | while not stdin_ready(): |
| 81 | pyglet.clock.tick() |
| 82 | for window in pyglet.app.windows: |
| 83 | window.switch_to() |
| 84 | window.dispatch_events() |
| 85 | window.dispatch_event('on_draw') |
| 86 | flip(window) |
| 87 | |
| 88 | # We need to sleep at this point to keep the idle CPU load |
| 89 | # low. However, if sleep to long, GUI response is poor. As |
| 90 | # a compromise, we watch how often GUI events are being processed |
| 91 | # and switch between a short and long sleep time. Here are some |
| 92 | # stats useful in helping to tune this. |
| 93 | # time CPU load |
| 94 | # 0.001 13% |
| 95 | # 0.005 3% |
| 96 | # 0.01 1.5% |
| 97 | # 0.05 0.5% |
| 98 | used_time = clock() - t |
| 99 | if used_time > 10.0: |
| 100 | # print 'Sleep for 1 s' # dbg |
| 101 | time.sleep(1.0) |
| 102 | elif used_time > 0.1: |
| 103 | # Few GUI events coming in, so we can sleep longer |
| 104 | # print 'Sleep for 0.05 s' # dbg |
| 105 | time.sleep(0.05) |
| 106 | else: |
| 107 | # Many GUI events coming in, so sleep only very little |
| 108 | time.sleep(0.001) |
| 109 | except KeyboardInterrupt: |
| 110 | pass |
| 111 | return 0 |
nothing calls this directly
no test coverage detected