Around 13 o'clock on Jun 29, Alan Coopersmith wrote:

> > At one point I got the impression that XFree86 didn't support more
> > than five buttons.  Is this true?  This would seem to me like an
> > arbitrary limit that we should grow past nowadays...

No.  The core protocol supports up to 256 (255?) buttons.

> The limitation on core pointer buttons comes from the event definition in the
> core X11 protocol:
>
> SETofKEYBUTMASK

That limit restricts which mouse buttons are present in the state field
for events and which may be used to modify grabs, it doesn't restrict the
reporting of higher numbered mouse buttons in regular button events, nor
grabbing those buttons.

Keith Packard        XFree86 Core Team        HP Cambridge Research Lab


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