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Script to emulate key-presses on Windows via Python.
# directkeys.py
# http://stackoverflow.com/questions/13564851/generate-keyboard-events
# msdn.microsoft.com/en-us/library/dd375731
import ctypes
from ctypes import wintypes
import time
user32 = ctypes.WinDLL('user32', use_last_error=True)
INPUT_MOUSE = 0
INPUT_KEYBOARD = 1
INPUT_HARDWARE = 2
KEYEVENTF_EXTENDEDKEY = 0x0001
KEYEVENTF_KEYUP = 0x0002
KEYEVENTF_UNICODE = 0x0004
KEYEVENTF_SCANCODE = 0x0008
MAPVK_VK_TO_VSC = 0
# List of all codes for keys:
# # msdn.microsoft.com/en-us/library/dd375731
UP = 0x26
DOWN = 0x28
A = 0x41
# C struct definitions
wintypes.ULONG_PTR = wintypes.WPARAM
class MOUSEINPUT(ctypes.Structure):
_fields_ = (("dx", wintypes.LONG),
("dy", wintypes.LONG),
("mouseData", wintypes.DWORD),
("dwFlags", wintypes.DWORD),
("time", wintypes.DWORD),
("dwExtraInfo", wintypes.ULONG_PTR))
class KEYBDINPUT(ctypes.Structure):
_fields_ = (("wVk", wintypes.WORD),
("wScan", wintypes.WORD),
("dwFlags", wintypes.DWORD),
("time", wintypes.DWORD),
("dwExtraInfo", wintypes.ULONG_PTR))
def __init__(self, *args, **kwds):
super(KEYBDINPUT, self).__init__(*args, **kwds)
# some programs use the scan code even if KEYEVENTF_SCANCODE
# isn't set in dwFflags, so attempt to map the correct code.
if not self.dwFlags & KEYEVENTF_UNICODE:
self.wScan = user32.MapVirtualKeyExW(self.wVk,
MAPVK_VK_TO_VSC, 0)
class HARDWAREINPUT(ctypes.Structure):
_fields_ = (("uMsg", wintypes.DWORD),
("wParamL", wintypes.WORD),
("wParamH", wintypes.WORD))
class INPUT(ctypes.Structure):
class _INPUT(ctypes.Union):
_fields_ = (("ki", KEYBDINPUT),
("mi", MOUSEINPUT),
("hi", HARDWAREINPUT))
_anonymous_ = ("_input",)
_fields_ = (("type", wintypes.DWORD),
("_input", _INPUT))
LPINPUT = ctypes.POINTER(INPUT)
def _check_count(result, func, args):
if result == 0:
raise ctypes.WinError(ctypes.get_last_error())
return args
user32.SendInput.errcheck = _check_count
user32.SendInput.argtypes = (wintypes.UINT, # nInputs
LPINPUT, # pInputs
ctypes.c_int) # cbSize
# [TODO]
KEYMAP = {'tab': 9,
'enter': 13,
'shift': 16,
'ctrl': 17,
'alt': 18,
'pause': 19,
'esc': 27,
'space': 32,
'win': 91,
'f9': 120,
'brefresh': 168,
'bstop': 169,
'bsearch': 170,
'mute': 173,
'voldown': 174,
'volup': 175,
'next': 176,
'play': 179,
'left': 37,
'up': 38,
'right': 39,
'down': 40}
def hold(key):
global KEYMAP
if type(key) == int:
hexKeyCode = key
else:
hexKeyCode = KEYMAP[key]
inp = INPUT(type=INPUT_KEYBOARD, ki=KEYBDINPUT(wVk=hexKeyCode))
user32.SendInput(1, ctypes.byref(inp), ctypes.sizeof(inp))
def press(key):
global KEYMAP
if type(key) == int:
hexKeyCode = key # hex necessary?
else:
hexKeyCode = KEYMAP[key]
inp = INPUT(type=INPUT_KEYBOARD, ki=KEYBDINPUT(wVk=hexKeyCode))
user32.SendInput(1, ctypes.byref(inp), ctypes.sizeof(inp))
return release(key)
def release(key):
global KEYMAP
if type(key) == int:
hexKeyCode = key
else:
hexKeyCode = KEYMAP[key]
x = INPUT(type=INPUT_KEYBOARD,
ki=KEYBDINPUT(wVk=hexKeyCode,
dwFlags=KEYEVENTF_KEYUP))
user32.SendInput(1, ctypes.byref(x), ctypes.sizeof(x))
if __name__ == "__main__":
hold("win")
press("down")
release("win")
msg = "If your active window has moved, "
msg += "all tests have passed."
print(msg)
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