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Add some comments about hotkey handling on Windows.

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This commit is contained in:
Jonathan Harris 2015-12-01 17:52:03 +00:00
parent 1868caab99
commit 1af4bb7fba
1 changed files with 4 additions and 2 deletions
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6
hotkey.py
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@ -317,7 +317,9 @@ elif platform == 'win32':
pass
def fromevent(self, event):
# event.state is a pain - it shows the state of the modifiers *before* a modifier key was pressed
# event.state is a pain - it shows the state of the modifiers *before* a modifier key was pressed.
# event.state *does* differentiate between left and right Ctrl and Alt and between Return and Enter
# by putting KF_EXTENDED in bit 18, but RegisterHotKey doesn't differentiate.
modifiers = ((GetKeyState(VK_MENU) & 0x8000) and MOD_ALT) | ((GetKeyState(VK_CONTROL) & 0x8000) and MOD_CONTROL) | ((GetKeyState(VK_SHIFT) & 0x8000) and MOD_SHIFT) | ((GetKeyState(VK_LWIN) & 0x8000) and MOD_WIN) | ((GetKeyState(VK_RWIN) & 0x8000) and MOD_WIN)
keycode = event.keycode
@ -328,7 +330,7 @@ elif platform == 'win32':
return False
elif keycode in [ VK_BACK, VK_DELETE, VK_CLEAR, VK_OEM_CLEAR ]: # BkSp, Del, Clear = clear hotkey
return None
elif keycode in [ VK_RETURN, VK_SPACE, VK_OEM_MINUS] or 0x41 <= keycode <= 0x5a: # don't allow keys needed for typing in System Map
elif keycode in [ VK_RETURN, VK_SPACE, VK_OEM_MINUS] or ord('A') <= keycode <= ord('Z'): # don't allow keys needed for typing in System Map
winsound.MessageBeep()
return None
elif keycode in [ VK_NUMLOCK, VK_SCROLL, VK_PROCESSKEY ] or VK_CAPITAL <= keycode <= VK_MODECHANGE: # ignore unmodified mode switch keys