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Re: trying to use InputField as a continually attentive

  • To: mathgroup at smc.vnet.net
  • Subject: [mg108837] Re: trying to use InputField as a continually attentive
  • From: Jaebum Jung <jaebum at wolfram.com>
  • Date: Sat, 3 Apr 2010 06:07:30 -0500 (EST)

You could try this with EventHandler

msgs={};DynamicModule[{ins=""},EventHandler[InputField[Dynamic[ins],String,ContinuousAction->True],{"ReturnKeyDown":>(msgs=AppendTo[msgs,ins];ins="";)}]]
Dynamic[Column@msgs]


- Jaebum


On 4/2/10 5:20 AM, mkr wrote:
> I am trying to set up some interactive code where I issue short
> instruction strings to drive some additional dynamic code.
>
> My hope was to use an InputField into which I could continuously type
> these short instructions, with a given character sequence ("do" in the
> code below) acting as the trigger (I was guessing that using the
> [Enter] key might not work).
>
> There are a couple of immediate problem behaviors that I observe:
> first, when InputField input contains spaces, the cursor keeps getting
> moved to inside of the string, second, after ending a string with
> "do", the cursor ends up to the right of the InputField, requiring a
> [<-] keypress to get the cursor back into the InputField.
>
> I am using 7.0.1 on XP. Code follows:
>
>
>
> msgs={};
> procstring[ins_String]:=If[StringLength[ins]>1&&StringTake[ins,
> {-2,-1}]=="do",AppendTo[msgs,StringTake[ins,{1,-3}]];"",ins]
>
> FullForm@procstring["process thisdo"];
> FullForm@procstring["and thisdo"];
> FullForm@procstring["but not this"];
> msgs
>
> ins="";
> InputField[Dynamic[ins,(ins=procstring[#])&],String,ContinuousAction-
>    
>> True]
>>      
> Dynamic[Column@msgs]
>
>
>
> Any help fixing this approach, or with some other technique for
> achieving the same general sort of input mechanism by another
> approach, would be greatly appreciated.
>
> Thanks,
>
> Miles
>
>    



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