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51 lines
1.2 KiB
51 lines
1.2 KiB
import ctypes
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from ctypes import WinDLL, byref, WinError
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from ctypes.wintypes import MSG
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_user32 = WinDLL("user32")
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GetMessage = _user32.GetMessageA
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GetMessage.argtypes = [
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ctypes.c_void_p,
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ctypes.c_void_p,
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ctypes.c_uint,
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ctypes.c_uint,
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]
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TranslateMessage = _user32.TranslateMessage
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DispatchMessage = _user32.DispatchMessageA
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class _MessageLoop(object):
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def __init__(self):
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self._filters = []
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def insert_filter(self, obj, index=-1):
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self._filters.insert(index, obj)
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def remove_filter(self, obj):
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self._filters.remove(obj)
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def run(self):
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msg = MSG()
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lpmsg = byref(msg)
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while 1:
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ret = GetMessage(lpmsg, 0, 0, 0)
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if ret == -1:
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raise WinError()
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elif ret == 0:
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return # got WM_QUIT
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if not self.filter_message(lpmsg):
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TranslateMessage(lpmsg)
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DispatchMessage(lpmsg)
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def filter_message(self, lpmsg):
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return any(list(filter(lpmsg)) for filter in self._filters)
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_messageloop = _MessageLoop()
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run = _messageloop.run
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insert_filter = _messageloop.insert_filter
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remove_filter = _messageloop.remove_filter
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__all__ = ["run", "insert_filter", "remove_filter"]
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