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Vertical scale control: up is down and down is up [message #450303]

Wed, 09 February 2005 22:47

Paul Murphy

Messages: 33
Registered: July 2009

Member

I've noticed that with my vertical scale controls, the top most position
of the marker yeilds a selection value of 1, and the bottom most
position yeilds 100. I would expect the highest position to have the
highest value.

I think a user would too. If I'm a user and moving a control up and
down, I'd expect the value that the control represents to move up and
down as well. As a programmer, this puts me in a position of
reinterpreting the value of the scale control to be "what the user
meant" instead of simply reading it raw.

I think perhaps the reason this is implemented in this way is that the
scale is a similar control to the scroll bar. In a scroll bar, down
means "further along in the document", which would mean a higher value
the further down the control was set. So perhaps scale inherited some
functionality from scroll?

Can anyone shed any light on this for me?

Thanks, Paul

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Re: Vertical scale control: up is down and down is up [message #450357 is a reply to message #450303]

Thu, 10 February 2005 19:03

Steve Northover

Messages: 1636
Registered: July 2009

Senior Member

All of the platforms do it this way natively so we just didn't fight it.

"pmurphy" <pmurphy@dimensional.com> wrote in message
news:cue3sr$tbo$1@www.eclipse.org...
> I've noticed that with my vertical scale controls, the top most position
> of the marker yeilds a selection value of 1, and the bottom most
> position yeilds 100. I would expect the highest position to have the
> highest value.
>
> I think a user would too. If I'm a user and moving a control up and
> down, I'd expect the value that the control represents to move up and
> down as well. As a programmer, this puts me in a position of
> reinterpreting the value of the scale control to be "what the user
> meant" instead of simply reading it raw.
>
> I think perhaps the reason this is implemented in this way is that the
> scale is a similar control to the scroll bar. In a scroll bar, down
> means "further along in the document", which would mean a higher value
> the further down the control was set. So perhaps scale inherited some
> functionality from scroll?
>
> Can anyone shed any light on this for me?
>
> Thanks, Paul

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