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Re: Initialization problem in a DynamicModule

• To: mathgroup at smc.vnet.net
• Subject: [mg106640] Re: [mg106634] Initialization problem in a DynamicModule
• From: Patrick Scheibe <pscheibe at trm.uni-leipzig.de>
• Date: Wed, 20 Jan 2010 06:46:01 -0500 (EST)
• References: <201001191014.FAA29115@smc.vnet.net>

Hi,

it matters that your assign and initialize functions have DownValues.

Panel@DynamicModule[{x, y, assign, initialize}, 
  Grid[{{"", "A", "B"}, {"w/ assign:", 
     RadioButton[Dynamic[x, (x = #; assign[]) &], True], 
     RadioButton[Dynamic[x, (x = #; assign[]) &], 
      False]}, {"w/o assign:", RadioButton[Dynamic@x, True], 
     RadioButton[Dynamic@x, False]}, {"value:", Dynamic@x}}, 
   Dividers -> {False, {False, True, True, True, False}}, 
   Alignment -> {Left, {Center}}], 
  Initialization :> (assign[] := (y = 
       x);(*further variables to update*)
    initialize[] := (x = True; assign[]);(*initialization function*)
    initialize[];)]

Cheers
Patrick


On Tue, 2010-01-19 at 05:14 -0500, István wrote:
> Dear Group,
> 
> I have some problem with a complex interface inside a DynamicModule.
> This is a toy version of the program, which can fully reproduce the
> malfunction:
> 
> Panel@DynamicModule[
>   {x, y, assign, initialize},
> 
>   Grid[{
>     {"", "A", "B"},
>     {"w/ assign:", RadioButton[Dynamic[x, (x = #; assign) &], True],
>      RadioButton[Dynamic[x, (x = #; assign) &], False]},
>     {"w/o assign:", RadioButton[Dynamic@x, True],
>      RadioButton[Dynamic@x, False]},
>     {"value:", Dynamic@x}
>     }, Dividers -> {False, {False, True, True, True, False}},
>    Alignment -> {Left, {Center}}],
> 
>   Initialization :> (
>     assign := (y = x);(* further variables to update *)
>     initialize := (x = True; assign); (* initialization function *)
>     initialize;
>     )
>   ]
> 
> Now for some reason, the radiobuttons do not function as intended (at
> least as I want).
> The following clicking orders do not work:
> 
> [w/ + B] then [w/ + A]
> [w/o + B] then [w/ + A]
> 
> these work correctly:
> 
> [w/ + B] then [w/o + A]
> [w/o + B] then [w/o + A]
> 
> I guess, that the problem is with the "initialize" (or the "assign")
> function. Any idea?
> Thanks in advance
> 
> Istv=E1n
> 

• References:
  • Initialization problem in a DynamicModule
    • From: István <replicatorzed@gmail.com>