pyglet.py
66 lines
| 2.3 KiB
| text/x-python
|
PythonLexer
Matthew R. Scott
|
r24149 | """Enable pyglet to be used interactively with prompt_toolkit | ||
Thomas Kluyver
|
r21942 | """ | ||
import sys | ||||
import time | ||||
from timeit import default_timer as clock | ||||
import pyglet | ||||
# On linux only, window.flip() has a bug that causes an AttributeError on | ||||
# window close. For details, see: | ||||
# http://groups.google.com/group/pyglet-users/browse_thread/thread/47c1aab9aa4a3d23/c22f9e819826799e?#c22f9e819826799e | ||||
if sys.platform.startswith('linux'): | ||||
def flip(window): | ||||
try: | ||||
window.flip() | ||||
except AttributeError: | ||||
pass | ||||
else: | ||||
def flip(window): | ||||
window.flip() | ||||
def inputhook(context): | ||||
"""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 for best performance. | ||||
""" | ||||
# We need to protect against a user pressing Control-C when IPython is | ||||
# idle and this is running. We trap KeyboardInterrupt and pass. | ||||
try: | ||||
t = clock() | ||||
while not context.input_is_ready(): | ||||
pyglet.clock.tick() | ||||
for window in pyglet.app.windows: | ||||
window.switch_to() | ||||
window.dispatch_events() | ||||
window.dispatch_event('on_draw') | ||||
flip(window) | ||||
# We need to sleep at this point to keep the idle CPU load | ||||
# low. However, if sleep to long, GUI response is poor. As | ||||
# a compromise, we watch how often GUI events are being processed | ||||
# and switch between a short and long sleep time. Here are some | ||||
# stats useful in helping to tune this. | ||||
# time CPU load | ||||
# 0.001 13% | ||||
# 0.005 3% | ||||
# 0.01 1.5% | ||||
# 0.05 0.5% | ||||
used_time = clock() - t | ||||
if used_time > 10.0: | ||||
Antony Lee
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r28756 | # print('Sleep for 1 s') # dbg | ||
Thomas Kluyver
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r21942 | time.sleep(1.0) | ||
elif used_time > 0.1: | ||||
# Few GUI events coming in, so we can sleep longer | ||||
Antony Lee
|
r28756 | # print('Sleep for 0.05 s') # dbg | ||
Thomas Kluyver
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r21942 | time.sleep(0.05) | ||
else: | ||||
# Many GUI events coming in, so sleep only very little | ||||
time.sleep(0.001) | ||||
except KeyboardInterrupt: | ||||
pass | ||||