[Oberon] Mice in Native Oberon.

[Jan de Kruyf]

hallo,
trying to get beck into things. . .

In answer to your observation:
In Linux my laptop also sums the pad and the mouse. So I guess it is
standard behaviour
and when you want to select mouse only for instance, you switch the pad off
in the bios.

j.


On Tue, Oct 20, 2015 at 9:42 PM, <peter at easthope.ca> wrote:

> In Native Oberon,
> ====
> MODULE Input;
>         ...
> TYPE
>         PollMouse* = PROCEDURE (VAR keys: SET; VAR dx, dy, dz: INTEGER):
> BOOLEAN;       (** non-portable *)
>         ...
>         MousePoller = POINTER TO RECORD
>                 poll: PollMouse;
>                 next: MousePoller
>         END;
>                 ...
> VAR
>                 ...
>         mouse: MousePoller;
> ====
> Good!  mouse.next can point to a second mouse and etc.  That allows a list
> of mice.
>
> Further on,
> ====
> PROCEDURE Mouse*(VAR keys: SET; VAR x, y: INTEGER);
>         ...
>                 REPEAT  (* get all available mouse events, or until keys
> change *)
>                         p := mouse; rawkeys := {}; ok := FALSE;
>                         WHILE p # NIL DO        (* poll all mice and sum
> keys and movements *)
>                                 IF p.poll(mousekeys, dx, dy, dz) THEN
>                                         (* Assimilate mouse button
> information and X,Y coordinate information. *)
>                                 END;
>                                 p := p.next
>                         END
>                 UNTIL ~ok OR (rawkeys # lastkeys);
> ====
>
> Observation
> REPEAT .. UNTIL steps through the list of mice, assimilating
> information from each.  When more than one mouse is present, the
> input from each is equivalent to another.  Multiple mice simply allows
> redundancy.  In the sources, I've seen nothing to add a second mouse to
> the list.
>
> Conclusion
> Input was built to allow multiple mice but the code to configure and use
> multiple mice wasn't developed.
>
> Correct?  Erroneous?  Comments?
>
> Thanks,                       ... Peter E.
>
> --
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