xlib是否有活动的窗口事件? [英] Does xlib have an active window event?
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问题描述
我正在尝试编写一个程序,该程序使用Xlib跟踪活动窗口何时更改.我很难找出最好的方法来做到这一点.到目前为止,这些是我的想法:
I am trying to write a program that tracks when the active window changes using Xlib. I am have trouble figuring out the best way to do this. These are my ideas so far:
- 每秒使用_NET_ACTIVE_WINDOW获取活动窗口,如果窗口已更改,则运行事件的相关代码.
- 获取所有窗口的列表,并在事件中倾听它们的焦点.我将不得不弄清楚如何保持打开的窗口的最新列表.
他们是更轻松/更好的方式吗?我是Xlib编程的新手.
Is their an easier/better way? I am new to programming with Xlib.
推荐答案
这是@alanc建议的Python实现.
Here's a Python implementation of what @alanc proposed.
import Xlib
import Xlib.display
disp = Xlib.display.Display()
root = disp.screen().root
NET_ACTIVE_WINDOW = disp.intern_atom('_NET_ACTIVE_WINDOW')
NET_WM_NAME = disp.intern_atom('_NET_WM_NAME')
last_seen = {'xid': None}
def get_active_window():
window_id = root.get_full_property(NET_ACTIVE_WINDOW,
Xlib.X.AnyPropertyType).value[0]
focus_changed = (window_id != last_seen['xid'])
last_seen['xid'] = window_id
return window_id, focus_changed
def get_window_name(window_id):
try:
window_obj = disp.create_resource_object('window', window_id)
window_name = window_obj.get_full_property(NET_WM_NAME, 0).value
except Xlib.error.XError:
window_name = None
return window_name
if __name__ == '__main__':
root.change_attributes(event_mask=Xlib.X.PropertyChangeMask)
while True:
win, changed = get_active_window()
if changed:
print(get_window_name(win))
while True:
event = disp.next_event()
if (event.type == Xlib.X.PropertyNotify and
event.atom == NET_ACTIVE_WINDOW):
break
我为某人编写的示例的完整注释版本在此要点中
The more fully-commented version I wrote as an example for someone is in this gist.
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