抓键盘不允许改变焦点 [英] grabbing keyboard doesnt allow changing focus

问题描述

当我使用display.grab_keyboard时，似乎没有其他窗口知道其自身的焦点.

as soon as i use display.grab_keyboard, no other window seems to know of its own focus.

运行键盘抓取功能时，我可以选择其他窗口，甚至可以向它们发送键盘事件，但是如果此窗口是文本输入，则不会有闪烁的光标.

with the keyboardgrab running i can select other windows and even send keyevents to them, but if this window is a text input there will be no blinking cursor.

我读了一些有关grab_keyboard生成焦点事件的内容，但这并不意味着它会阻止所有焦点事件，对吗?

i read something about grab_keyboard generating focusevents, but that doesnt mean it blocks all focus events, does it?

我什么都不来?

from Xlib import X,XK
from Xlib.display import Display
import signal,sys

root = None
display = None

def main():
    # current display
    global display,root
    display = Display()
    root = display.screen().root


    root.change_attributes(event_mask = X.KeyPressMask|X.KeyReleaseMask)

    root.grab_keyboard(True, X.GrabModeAsync, X.GrabModeAsync,X.CurrentTime)

    signal.signal(signal.SIGALRM, lambda a,b:sys.exit(1))
    signal.alarm(10)

    while True:
        event = display.next_event()
        print event.type

main()

推荐答案

您正在抓取键盘，这意味着所有键盘输入都将进入您的程序，其他任何窗口都无法接收键盘输入.那就是抓住键盘的关键所在.

You are grabbing the keyboard, that means that all keyboard input will go to your program, no other window can receive keyboard input. That's the point of grabbing the keyboard.

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