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MathGroup Archive 2007

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Re: Re: Compatibility woes

  • To: mathgroup at smc.vnet.net
  • Subject: [mg76229] Re: [mg76099] Re: Compatibility woes
  • From: Yu-Sung Chang <yusung at wolfram.com>
  • Date: Fri, 18 May 2007 06:09:46 -0400 (EDT)
  • Organization: Wolfram Research, Inc.
  • References: <f295kp$n4k$1@smc.vnet.net> <30568553.1179316638063.JavaMail.root@m35> <op.tsfni5p3qu6oor@monster.ma.dl.cox.net> <13780686.1179343455242.JavaMail.root@m35> <op.tsggv2l4qu6oor@monster.ma.dl.cox.net>

Of course, the slider is susceptible to the length of the entry it is 
representing. Even worse, if the entry is not discrete, but continuous, 
there is no guarantee that you will get a wanted value.
Scrollbar is obviously better option for this particular case (palette), 
but unfortunately, we don't have scrollbar (yet) due to few reasons. But 
it will be revised in the future.

Yu-Sung Chang
Kernel Technology
Wolfram Research, Inc.

DrMajorBob wrote:
>> slider moves directly to the mouse position. Concerning the slider 
>> speed, we found that it is reasonably responsive (not too fast or not 
>> too slow) for many. Actually, it is up to the system mouse 
>> sensitivity setting, not Mathematica.
>
> I belatedly realize that can't be true.
>
> No matter how sensitive (or not) the mouse may be, the maximum mouse 
> movement (equal to the visible height of the control) must equate to 
> moving through ALL members in the list. So the speed at which the list 
> flies by, for ANY given mouse movement, is (and has to be, for a 
> slider) proportional to the number of entries in the list.
>
> Hence sliders are tolerable for small lists, intolerable for very long 
> lists. For a list with millions of entries, one pixel of mouse 
> movement on the screen could equate to thousands of entries, but maybe 
> we're only seeing five or ten.
>
> Screen resolution has an effect; high resolution => short visible 
> control => faster movement through the list. I run my screen at 
> 1280x1024, so the "speed" I'm looking at is 25% greater than what 
> you'd see at 1024x768.
>
> No?
>



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