def inputhook_wx3():
"""Run the wx event loop by processing pending events only.
This is like inputhook_wx1, but it 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:
app = wx.GetApp() # @UndefinedVariable
if app is not None:
if hasattr(wx, 'IsMainThread'):
assert wx.IsMainThread() # @UndefinedVariable
else:
assert wx.Thread_IsMain() # @UndefinedVariable
# The import of wx on Linux sets the handler for signal.SIGINT
# to 0. This is a bug in wx or gtk. We fix by just setting it
# back to the Python default.
if not callable(signal.getsignal(signal.SIGINT)):
signal.signal(signal.SIGINT, signal.default_int_handler)
evtloop = wx.EventLoop() # @UndefinedVariable
ea = wx.EventLoopActivator(evtloop) # @UndefinedVariable
t = clock()
while not stdin_ready():
while evtloop.Pending():
t = clock()
evtloop.Dispatch()
app.ProcessIdle()
# 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:
# print 'Sleep for 1 s' # dbg
time.sleep(1.0)
elif used_time > 0.1:
# Few GUI events coming in, so we can sleep longer
# print 'Sleep for 0.05 s' # dbg
time.sleep(0.05)
else:
# Many GUI events coming in, so sleep only very little
time.sleep(0.001)
del ea
except KeyboardInterrupt:
pass
return 0
def inputhook_wx3():
"""Run the wx event loop by processing pending events only.
This is like inputhook_wx1, but it 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:
app = wx.GetApp() # @UndefinedVariable
if app is not None:
assert wx.Thread_IsMain() # @UndefinedVariable
# The import of wx on Linux sets the handler for signal.SIGINT
# to 0. This is a bug in wx or gtk. We fix by just setting it
# back to the Python default.
if not callable(signal.getsignal(signal.SIGINT)):
signal.signal(signal.SIGINT, signal.default_int_handler)
evtloop = wx.EventLoop() # @UndefinedVariable
ea = wx.EventLoopActivator(evtloop) # @UndefinedVariable
t = clock()
while not stdin_ready():
while evtloop.Pending():
t = clock()
evtloop.Dispatch()
app.ProcessIdle()
# 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:
# print 'Sleep for 1 s' # dbg
time.sleep(1.0)
elif used_time > 0.1:
# Few GUI events coming in, so we can sleep longer
# print 'Sleep for 0.05 s' # dbg
time.sleep(0.05)
else:
# Many GUI events coming in, so sleep only very little
time.sleep(0.001)
del ea
except KeyboardInterrupt:
pass
return 0
def inputhook_glut():
"""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.
signal.signal(signal.SIGINT, glut_int_handler)
try:
t = clock()
# Make sure the default window is set after a window has been closed
if glut.glutGetWindow() == 0:
glut.glutSetWindow(1)
glutMainLoopEvent()
return 0
while not stdin_ready():
glutMainLoopEvent()
# 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:
# print 'Sleep for 1 s' # dbg
time.sleep(1.0)
elif used_time > 0.1:
# Few GUI events coming in, so we can sleep longer
# print 'Sleep for 0.05 s' # dbg
time.sleep(0.05)
else:
# Many GUI events coming in, so sleep only very little
time.sleep(0.001)
except KeyboardInterrupt:
pass
return 0
def inputhook_glut():
"""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.
signal.signal(signal.SIGINT, glut_int_handler)
try:
t = clock()
# Make sure the default window is set after a window has been closed
if glut.glutGetWindow() == 0:
glut.glutSetWindow( 1 )
glutMainLoopEvent()
return 0
while not stdin_ready():
glutMainLoopEvent()
# 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:
# print 'Sleep for 1 s' # dbg
time.sleep(1.0)
elif used_time > 0.1:
# Few GUI events coming in, so we can sleep longer
# print 'Sleep for 0.05 s' # dbg
time.sleep(0.05)
else:
# Many GUI events coming in, so sleep only very little
time.sleep(0.001)
except KeyboardInterrupt:
pass
return 0
def inputhook_pyglet():
"""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 stdin_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:
# print 'Sleep for 1 s' # dbg
time.sleep(1.0)
elif used_time > 0.1:
# Few GUI events coming in, so we can sleep longer
# print 'Sleep for 0.05 s' # dbg
time.sleep(0.05)
else:
# Many GUI events coming in, so sleep only very little
time.sleep(0.001)
except KeyboardInterrupt:
pass
return 0
def inputhook_pyglet():
"""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 stdin_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:
# print 'Sleep for 1 s' # dbg
time.sleep(1.0)
elif used_time > 0.1:
# Few GUI events coming in, so we can sleep longer
# print 'Sleep for 0.05 s' # dbg
time.sleep(0.05)
else:
# Many GUI events coming in, so sleep only very little
time.sleep(0.001)
except KeyboardInterrupt:
pass
return 0
def check_stdin(self):
if stdin_ready():
self.timer.Stop()
self.evtloop.Exit()
def inputhook_qt5():
"""PyOS_InputHook python hook for Qt5.
Process pending Qt events and if there's no pending keyboard
input, spend a short slice of time (50ms) running the Qt event
loop.
As a Python ctypes callback can't raise an exception, we catch
the KeyboardInterrupt and temporarily deactivate the hook,
which will let a *second* CTRL+C be processed normally and go
back to a clean prompt line.
"""
try:
allow_CTRL_C()
app = QtCore.QCoreApplication.instance()
if not app: # shouldn't happen, but safer if it happens anyway...
return 0
app.processEvents(QtCore.QEventLoop.AllEvents, 300)
if not stdin_ready():
# Generally a program would run QCoreApplication::exec()
# from main() to enter and process the Qt event loop until
# quit() or exit() is called and the program terminates.
#
# For our input hook integration, we need to repeatedly
# enter and process the Qt event loop for only a short
# amount of time (say 50ms) to ensure that Python stays
# responsive to other user inputs.
#
# A naive approach would be to repeatedly call
# QCoreApplication::exec(), using a timer to quit after a
# short amount of time. Unfortunately, QCoreApplication
# emits an aboutToQuit signal before stopping, which has
# the undesirable effect of closing all modal windows.
#
# To work around this problem, we instead create a
# QEventLoop and call QEventLoop::exec(). Other than
# setting some state variables which do not seem to be
# used anywhere, the only thing QCoreApplication adds is
# the aboutToQuit signal which is precisely what we are
# trying to avoid.
timer = QtCore.QTimer()
event_loop = QtCore.QEventLoop()
timer.timeout.connect(event_loop.quit)
while not stdin_ready():
timer.start(50)
event_loop.exec_()
timer.stop()
except KeyboardInterrupt:
global got_kbdint, sigint_timer
ignore_CTRL_C()
got_kbdint = True
mgr.clear_inputhook()
# This generates a second SIGINT so the user doesn't have to
# press CTRL+C twice to get a clean prompt.
#
# Since we can't catch the resulting KeyboardInterrupt here
# (because this is a ctypes callback), we use a timer to
# generate the SIGINT after we leave this callback.
#
# Unfortunately this doesn't work on Windows (SIGINT kills
# Python and CTRL_C_EVENT doesn't work).
if(os.name == 'posix'):
pid = os.getpid()
if(not sigint_timer):
sigint_timer = threading.Timer(.01, os.kill,
args=[pid, signal.SIGINT])
sigint_timer.start()
else:
print("\nKeyboardInterrupt - Ctrl-C again for new prompt")
except: # NO exceptions are allowed to escape from a ctypes callback
ignore_CTRL_C()
from traceback import print_exc
print_exc()
print("Got exception from inputhook_qt5, unregistering.")
mgr.clear_inputhook()
finally:
allow_CTRL_C()
return 0
def inputhook_qt5():
"""PyOS_InputHook python hook for Qt5.
Process pending Qt events and if there's no pending keyboard
input, spend a short slice of time (50ms) running the Qt event
loop.
As a Python ctypes callback can't raise an exception, we catch
the KeyboardInterrupt and temporarily deactivate the hook,
which will let a *second* CTRL+C be processed normally and go
back to a clean prompt line.
"""
try:
allow_CTRL_C()
app = QtCore.QCoreApplication.instance()
if not app: # shouldn't happen, but safer if it happens anyway...
return 0
app.processEvents(QtCore.QEventLoop.AllEvents, 300)
if not stdin_ready():
# Generally a program would run QCoreApplication::exec()
# from main() to enter and process the Qt event loop until
# quit() or exit() is called and the program terminates.
#
# For our input hook integration, we need to repeatedly
# enter and process the Qt event loop for only a short
# amount of time (say 50ms) to ensure that Python stays
# responsive to other user inputs.
#
# A naive approach would be to repeatedly call
# QCoreApplication::exec(), using a timer to quit after a
# short amount of time. Unfortunately, QCoreApplication
# emits an aboutToQuit signal before stopping, which has
# the undesirable effect of closing all modal windows.
#
# To work around this problem, we instead create a
# QEventLoop and call QEventLoop::exec(). Other than
# setting some state variables which do not seem to be
# used anywhere, the only thing QCoreApplication adds is
# the aboutToQuit signal which is precisely what we are
# trying to avoid.
timer = QtCore.QTimer()
event_loop = QtCore.QEventLoop()
timer.timeout.connect(event_loop.quit)
while not stdin_ready():
timer.start(50)
event_loop.exec_()
timer.stop()
except KeyboardInterrupt:
global got_kbdint, sigint_timer
ignore_CTRL_C()
got_kbdint = True
mgr.clear_inputhook()
# This generates a second SIGINT so the user doesn't have to
# press CTRL+C twice to get a clean prompt.
#
# Since we can't catch the resulting KeyboardInterrupt here
# (because this is a ctypes callback), we use a timer to
# generate the SIGINT after we leave this callback.
#
# Unfortunately this doesn't work on Windows (SIGINT kills
# Python and CTRL_C_EVENT doesn't work).
if(os.name == 'posix'):
pid = os.getpid()
if(not sigint_timer):
sigint_timer = threading.Timer(.01, os.kill,
args=[pid, signal.SIGINT] )
sigint_timer.start()
else:
print("\nKeyboardInterrupt - Ctrl-C again for new prompt")
except: # NO exceptions are allowed to escape from a ctypes callback
ignore_CTRL_C()
from traceback import print_exc
print_exc()
print("Got exception from inputhook_qt5, unregistering.")
mgr.clear_inputhook()
finally:
allow_CTRL_C()
return 0
def inputhook_tk():
while app.dooneevent(TCL_DONT_WAIT) == 1:
if stdin_ready():
break
return 0
def inputhook_cb(stop):
if stop_cb.is_set() or stdin_ready():
os.write(fh.wh, b'x')
stop.set()
