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On 18 Sep 2018, at 13:44, Eric E. Dolecki <edolecki@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. This will require multiple touch and drags but he's fine with it.

The math is probably simple, but it's eluding me this morning. How can I easily convert my distance (I also have an increment Bool so I know whether it's addition or subtraction) to an appropriate value?

I’m not sure you’ve described the problem particularly clearly, because when I read your e-mail I came the conclusion that you just need to divide your distance by 20, but that can’t be right otherwise you’d have worked it out yourself… Kind regards, Alastair. -- http://alastairs-place.net _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/site_archiver%40lists.appl... This email sent to site_archiver@lists.apple.com