Re: Touchscreens and control scaling
Re: Touchscreens and control scaling
- Subject: Re: Touchscreens and control scaling
- From: Joe Ranieri <email@hidden>
- Date: Thu, 4 Jun 2009 03:51:58 -0400
On Jun 4, 2009, at 03:44, Ben wrote:
Hi list,
I've been sketching out an application and could do with a little
advice on which cocoa-direction to take. It's a full-screen (kiosk)
type app, running in a very controlled environment (not for wide
release) but which would run on an external touchscreen monitor.
While I can make buttons and labels big enough for fingers to poke,
I'm concerned about controls like table headers and scrollers being
large enough to make finger-size targets. I'm asking sooner rather
than after testing the usability in case there are special
considerations I should take before writing the first lines of code.
The only options I can think of are:
1. Make a normal app and use quartz debug to scale *everything* up
2. Subclass and/or redraw any controls too small for finger taps
3. Shut up and try it out first
I don't think option 1 will work well. Apple hasn't done too much to
make anything resolution independent. Try running stuff on a non-1.0
scale factor to see. We ended up going with option 2, partially for
usability, and partially because we wanted an entirely themed kiosk
environment anyways.
From my limited testing, some small controls are a problem with a
touch screen, but it depends on the accuracy of the touch screen and
the ability of your user.
-- Joe Ranieri
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