[softwarelist] Re: Mouse wheel Scrolling - Ovation Pro


On 20 Feb 2009, at 09:08, Dr Alan Leighton wrote:


In message <ec4c773050.ewen@xxxxxxxxxxxxxxxxxxxx>
         Ewen Pring <Ewen_Pring@xxxxxxxxxxxxx> wrote:


In message <502e905358evan@xxxxxxxxxxxxxxxxxxxx> sent on 16 Feb
         Evan Clark <evan@xxxxxxxxxxxxxxxxxxxx> wrote:
In message <bb4a772e50.rogerarm@xxxxxxxxxxxxxxxxxxx>, Roger Darlington 
<rogerarm@xxxxxxxxxx> writes
Thesaurus 1.25, whenever you are tempted to use the mouse scroll wheel 
in any of its windows, disables and crashes mouse scrolling on the
Iyonix RO5.13.



Does this discussion in this thread bring us any closer to being able
to use a mouse scroll wheel in Ovation Pro, without using HID? I can
use to RISC OS 5 to scroll vertically in most commonly used
applications (Easiwriter, Netsurf, StrongED and Messenger Pro) - but
unfortunately not OP.


I hope there is an answer as HID often causes OPro to freeze.



The standard scroll feature of RISC OS 5 is very limited.
This was one of the main reasons for developing the scroll feature of HID. By the way: it is NOT HID that does the scrolling, but a separate module, called WimpScroll, that does the work. I used this module many years ago on my RISC PC together with a modified PS2Driver. That module is interfaced with HID, which wasn't possible with the standard USB drivers in RISC OS 5.
Furthermore, the standard RISC OS 5 USB keyboard/mouse driver 'assumes' a particular protocol to be used by the keyboard and the mouse, whereas HID interrogates the device and processes data generated by the device, exactly in the way the device tells it to. Well, sort of. In other words: a data packet send by one type of mouse may or may not be similar to that of another type of mouse. There is no standard (except for the USB HID protocol), so a device can produce anything it likes. 

I didn't know that OPro often freezes when HID is in use.
As far as I recall, this has never been reported to me. Can anyone confirm this? 
If the latter is true, does anyone know how to reproduce it?
HID is present on my own machine, and has been in use all day every single day for the past 7 years or so, and it has hardly ever let me down so far. You might want to check your version number and check whether it's compatible with your version of RISC OS 5. 

Best regards,

 X-Ample Technology BV
 Paul Reuvers
 info@xxxxxx




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