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Re: locator snap

  • To: mathgroup at smc.vnet.net
  • Subject: [mg88257] Re: locator snap
  • From: Albert Retey <awnl at arcor.net>
  • Date: Wed, 30 Apr 2008 04:22:17 -0400 (EDT)
  • References: <fv6ukg$rmt$1@smc.vnet.net>

Maarten van der Burgt wrote:
> Dear all,
> 
> In the example below the locator can be moved to any position in the graphic.
> Can the locator be made to snap to multiples of say 0.1?
> 
>  Manipulate[Column@{Graphics[{}, Axes -> True], p}, {{p, {0, 0}}, Locator}]
> 
> Thanks for your help.
> 
> Maarten

This is almost literaly from the documentation of Locator -> Scope ->
Locator Control, I just changed the constrain:

Deploy[DynamicModule[{p = {1, 0}},
  Graphics[{Red, Disk[],
    Locator[Dynamic[p, (p = Round[#*10]/10.) &]]}, PlotRange -> 1.5,
   PlotLabel -> Dynamic[p]]]]

hth,

albert


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