我坚持做什么。当我的Qt应用程序没有成为焦点时,我有一个xlib的while循环来读取按键。这是来自ubuntu 16.04 python3-xlib包/usr/share/doc/python3-xlib/examples/record_demo.py的复制粘贴。但这会破坏Qt应用程序的功能,因为它只能读取按键而不处理Qt的事件循环。我应该让我的Qt应用程序有第二个线程吗?或者我可以将xlib的循环挂在Qt的循环上吗?
我正在使用python3,pyqt5和python3-xlib。
以下是文件/usr/share/doc/python3-xlib/examples/record_demo.py
#!/usr/bin/python3
#
# examples/record_demo.py -- demonstrate record extension
#
# Copyright (C) 2006 Alex Badea <vamposdecampos@gmail.com>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
# Simple demo for the RECORD extension
# Not very much unlike the xmacrorec2 program in the xmacro package.
import sys
import os
# Change path so we find Xlib
sys.path.insert(1, os.path.join(sys.path[0], '..'))
from Xlib import X, XK, display
from Xlib.ext import record
from Xlib.protocol import rq
local_dpy = display.Display()
record_dpy = display.Display()
def lookup_keysym(keysym):
for name in dir(XK):
if name[:3] == "XK_" and getattr(XK, name) == keysym:
return name[3:]
return "[%d]" % keysym
def record_callback(reply):
if reply.category != record.FromServer:
return
if reply.client_swapped:
print("* received swapped protocol data, cowardly ignored")
return
if not len(reply.data) or reply.data[0] < 2:
# not an event
return
data = reply.data
while len(data):
event, data = rq.EventField(None).parse_binary_value(data, record_dpy.display, None, None)
if event.type in [X.KeyPress, X.KeyRelease]:
pr = event.type == X.KeyPress and "Press" or "Release"
keysym = local_dpy.keycode_to_keysym(event.detail, 0)
if not keysym:
print("KeyCode%s %s" % (pr, event.detail))
else:
print("KeyStr%s %s" % (pr, lookup_keysym(keysym)))
if event.type == X.KeyPress and keysym == XK.XK_Escape:
local_dpy.record_disable_context(ctx)
local_dpy.flush()
return
elif event.type == X.ButtonPress:
print("ButtonPress %s" % event.detail)
elif event.type == X.ButtonRelease:
print("ButtonRelease %s" % event.detail)
elif event.type == X.MotionNotify:
print("MotionNotify %i %i" % (event.root_x, event.root_y))
# Check if the extension is present
if not record_dpy.has_extension("RECORD"):
print("RECORD extension not found")
sys.exit(1)
r = record_dpy.record_get_version(0, 0)
print("RECORD extension version %d.%d" % (r.major_version, r.minor_version))
# Create a recording context; we only want key and mouse events
ctx = record_dpy.record_create_context(
0,
[record.AllClients],
[{
'core_requests': (0, 0),
'core_replies': (0, 0),
'ext_requests': (0, 0, 0, 0),
'ext_replies': (0, 0, 0, 0),
'delivered_events': (0, 0),
'device_events': (X.KeyPress, X.MotionNotify),
'errors': (0, 0),
'client_started': False,
'client_died': False,
}])
# Enable the context; this only returns after a call to record_disable_context,
# while calling the callback function in the meantime
record_dpy.record_enable_context(ctx, record_callback)
# Finally free the context
record_dpy.record_free_context(ctx)
答案 0 :(得分:2)
Qt的事件循环是 X事件循环。你不需要另一个。
由于您从事件循环中获取回调信息,因此只需使用Qt使用的相同xcb
库,即可正常工作&#34;那里的回调,你的回调将被调用。
如果您将信息作为事件获取,则可以过滤到达应用程序的所有本机X事件:使用QCoreApplication::installNativeEventFilter
。 QAbstractNativeEventFilter
的具体实现将接收本地事件作为xcb_generic_event_t
的指针,请参阅the documentation。
但是,如果遇到事件,与Python的互操作会有点复杂。您可能需要在C ++中实现事件过滤器并将其公开给Python。