Float distance in mouse scroll.

[PerretB]

Expected Behavior

Mouse scroll wheel function should accept float distance values on Windows.

It seems that a simple cast into int on this line https://github.com/pywinauto/pywinauto/blob/bf7f789d01b7c66ccd0c213db0a029da7e588c9e/pywinauto/windows/mouse.py#L321C37-L321C38 would solve the issue. Accepting float values would make sense because the distance is internally multiplied by 120 (one wheel click according to MS). However, I don't know about possible consequences on other systems.

Actual Behavior

Using a float value produces an Exception.

Steps to Reproduce the Problem

1. Call pywinauto.mouse.scroll(wheel_dist=x) with x a float value

produces

Traceback (most recent call last):
  File "pywinauto\mouse.py", line 260, in scroll
    _perform_click_input(button='wheel', wheel_dist=wheel_dist, coords=coords)
  File "pywinauto\mouse.py", line 177, in _perform_click_input
    win32api.mouse_event(
TypeError: 'float' object cannot be interpreted as an integer

Short Example of Code to Demonstrate the Problem

from pywinauto import mouse
mouse.scroll(wheel_dist=0.5)

Specifications

• Pywinauto version: 0.6.8
• Python version and bitness: 3.10 x64
• Platform and OS: AMD64, Windows

[vasily-v-ryabov]

This is interesting feature request. I guess it is possible to implement it for high level method .wheel_mouse_input(wheel_dist=0.5) or .click_input() if the scroll bar range is available at the UI element level. More low level function mouse.scroll(wheel_dist=0.5) has no information about any scroll bars, so the ratio 0.5 is undefined at this level.

[PerretB]

Thanks for your answer, indeed I was rather thinking about the low level feature. In my use case, there is no scroll bar (I use the scroll event to simulate a swipe up/down in a mobile like app), and a "wheel click" as defined by MS is indeed too coarse to have a fine control on the movement generated by the event. I tested with the low level win32 api and it accepts (and works) with distances which are not multiples of 120 (WHEEL_DELTA).