Re: Dynamic GUI problem II.

*To*: mathgroup at smc.vnet.net*Subject*: [mg89508] Re: Dynamic GUI problem II.*From*: dh <dh at metrohm.ch>*Date*: Wed, 11 Jun 2008 03:18:55 -0400 (EDT)*References*: <g2fub0$2fs$1@smc.vnet.net> <g2j0ab$558$1@smc.vnet.net> <g2lbf9$9aq$1@smc.vnet.net>

Hi, hope you come not back with an even trickier problem. Anyway, during playing around I got the impression that Dynamic still has some problems. Here is one way of doing what you want: fun[n0_]:=DynamicModule[{n=Round[n0],t,tt,vars}, vars=Table[Dynamic@Evaluate@Unique[],{n}]; t=(Slider[#])&/@vars; (Evaluate[#[[1]]]=0.5)&/@vars; Column[{t,vars}]//Print; ]; n=.; Slider[Dynamic[n,{(n=#;fun[n])&}],{1,5}] hope this helps, Daniel zac wrote: > Thank you for the reply, it partly solves my problem, but what if I > want to control the length of the array 'vars' as well with a slider? > Here is my proposed - not working - layout, based on your code: > > Remove[vars, a, x, v, n]; > {Slider[Dynamic[n], {1, 5, 1}], Dynamic[n]} > a = Table[RandomReal[], {n}] > vars = Dynamic /@ Array[v, {n}]; > x = (Slider[#, ImageSize -> 50] & /@ vars) > MapThread[Set[Evaluate[#1[[1]]], #2] &, {vars, a}]; > vars > > Clearly the problem starts when variables 'a' and 'vars' do not update > with the change of n. Of course, if I wrap the Table[...] and Array[] > expressions into Dynamics, MapThread won't recognize them as lists. Is > there any way to define 'n' as an always-dynamic-variable (other than > incorporating the whole thing into a Manipulate)? > Any ideas? > > Istvan > -- Daniel Huber Metrohm Ltd. Oberdorfstr. 68 CH-9100 Herisau Tel. +41 71 353 8585, Fax +41 71 353 8907 E-Mail:<mailto:dh at metrohm.com> Internet:<http://www.metrohm.com>