Re: 2 Mice -> 2 Pointer ?!?

On Fri, 29 Nov 2002, Jens Ansorg wrote:

>Steffen Bischoff wrote:
>
>> Hello Dr Andrew C Aitchison ,
>>
>> I am a programmer of graphic surfaces.
>> And I would like to serve 2 things at the same time with 2 different
>> mice!  That can happen in the same application.
>> e.g.: to press two buttons down at the same time.
>> Ok, its a little difficult with 2 mice, but if u only use Touce-Screen's
>> its absolutely necessarily.
>
>
>hm, in my understanding a touch screen is acting like a keyboard not a
>mouse: so you are pressing two keys at your keyboard at the same time
>... and that's easyly possible ;))

No,, because most (all?) touchscreen hardware can only sense a single
point of touch.  On the one I'm familiar with (Microtouch), placing
two fingers on the screen gives a touch coordinate approximately midway
between the two (but depending somewhat on the relative pressure applied
to each finger).

So on a touchscreen keyboard, any modifier keys (shift, ctrl, alt etc)
have to be locking, so you touch the modifier, then the key.


Roger