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Can someone clarify how to perform a DialogInput operation within a Button? I wrote some code for that but it's not working.

Button["Enter value", 
 DialogInput[{name = ""}, 
  Column[{InputField[Dynamic[name], String], 
    Button["Hi", Dynamic[name]]}]]]

My problem is this — when I run the above code, the given text is displayed but when I click on the button, the actual operation is not being carried out.

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Please make a better effort to use proper capitalization and fewer ellipsis........ – rm -rf♦ Jul 2 '12 at 18:35
But, the above DialogInput works as you expect and want when run in the notebook and not from a button? – Rojo Jul 2 '12 at 18:38
   
I mean, the button issue is probably fixed by adding Method->"Queued" to the button, but even so, is that your only problem? – Rojo Jul 2 '12 at 18:53
1  
What is the "Hi" button supposed to do? – Matariki Jul 2 '12 at 21:36
What is the meaning of Method-> "Queued" ?? – subbu Jul 5 '12 at 5:34

1 Answer

up vote 4 down vote

As Rojo has pointed out, Method -> "Queued" can be used for the Button to wait for the dialog to appear, be evaluated, and return. I assume you want to use the value of name in some outer computation, so I forwarded it via a DialogReturn and therefore it is made global (while name inside DialogInput is local). Note that DialogReturn is the standard way to return values from a dialog.

Dynamic@output

Button["Enter value", 
 output = DialogInput[{name = ""}, 
   Column[{InputField[Dynamic[name], String], 
     Button["Accept", DialogReturn[name]], 
     Button["Reject", DialogReturn[]]}]], Method -> "Queued"]

Mathematica graphics

Accepting the input text updates the value of output in the first line (Out[1]).

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