[Lazarus] MouseWheel scroll delta detection

[Graeme Geldenhuys]

A follow-up from my previous post.

So far, the only mention of this mouse wheel acceleration is in a
article listed below:
  http://adomas.org/javascript-mouse-wheel/

Under Mac OS X the mouse wheel delta goes from -+0.1 to -+30.0

In XLib and Win32 API's,  I could only get a delta of -+1 (no range).  :-(

Is the underlying windowing systems of XLib and Win32 to dumb to have
a delta range? If so, what a pitty!

Regards,
  - Graeme -


2008/6/5 Graeme Geldenhuys <graemeg.lists at gmail.com>:
> Hi,
>
> In Mac OS X, if your roll the mouse wheel quickly, you scroll a lot of
> text (almost like PgUp/PgDn). If you roll the mouse wheel slowly, it
> scrolls a few pixels as a time (smooth scrolling).
>
> How can I detect this in LCL?  If not LCL, how can I detect this in
> Win32 API and XLib directly? If it's only possible via directly
> looking at the windowing system, anybody know where I can find
> documentation on this?
>
>
> Regards,
>  - Graeme -
>
>
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