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Added scroll function #22

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Added scroll function #22

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17 changes: 17 additions & 0 deletions pydirectinput/__init__.py
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Original file line number Diff line number Diff line change
Expand Up @@ -31,6 +31,7 @@
MOUSEEVENTF_MIDDLEDOWN = 0x0020
MOUSEEVENTF_MIDDLEUP = 0x0040
MOUSEEVENTF_MIDDLECLICK = MOUSEEVENTF_MIDDLEDOWN + MOUSEEVENTF_MIDDLEUP
MOUSEEVENTF_WHEEL = 0x0800

# KeyBdInput Flags
KEYEVENTF_EXTENDEDKEY = 0x0001
Expand Down Expand Up @@ -374,6 +375,22 @@ def tripleClick(x=None, y=None, interval=0.0, button=LEFT, duration=0.0, tween=N

# Missing feature: scroll functions

#A negative number of clicks will scroll down and a positive number will scroll up
@_genericPyDirectInputChecks
def scroll(clicks=0, delay=0):
if clicks >= 0:
direction = 1
else:
direction = -1
clicks = abs(clicks)

for i in range(clicks):
extra = ctypes.c_ulong(0)
ii_ = Input_I()
ii_.mi = MouseInput(0, 0, ctypes.c_ulong(direction*120), MOUSEEVENTF_WHEEL, 0, ctypes.pointer(extra))
x = Input(ctypes.c_ulong(0), ii_)
SendInput(1, ctypes.pointer(x), ctypes.sizeof(x))
time.sleep(delay)

# Ignored parameters: duration, tween, logScreenshot
# PyAutoGUI uses ctypes.windll.user32.SetCursorPos(x, y) for this, which might still work fine in DirectInput
Expand Down