I have a currentValue (Int).
I have a distance of the moved. For every 20 pixels, increment or decrement
the currentValue by 1.
If I do this:
let tVal = Int(distanceValue / 20)
if increment {
currentValue = currentValue + tVal
if currentValue > maxValue { currentValue = maxValue }
} else {
currentValue = currentValue - tVal
if currentValue > maxValue { currentValue = maxValue }
}
Once the distance number gets high enough, I start to get tVal values of 2,
3, 4, etc. I think my logic is messed up here.
On Tue, Sep 18, 2018 at 9:03 AM Richard Charles <rcharles...@gmail.com>
wrote:
>
> > On Sep 18, 2018, at 6:44 AM, Eric E. Dolecki <edole...@gmail.com> wrote:
> >
> > I have a UI control that can be adjusted up and down using touch & drag.
> > I've been asked to provide a control value based on how far the drag is
> via
> > distance. So far so good.
> >
> > What my designer wants is a value change of every 20 pixels or so
> (control
> > is 150px tall @ the moment) - so every 20 pixels = a change of 1.
>
> I think you mean points not pixels.
>
> Not familiar with UI controls but this sounds very similiar to NSSlider.
>
> – maxValue
> – minValue
>
> – setMaxValue:
> – setMinValue:
>
> > This will require multiple touch and drags but he's fine with it.
>
> This does not sound right. I think something is wrong.
>
> --Richard Charles
>
>
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