DynamicModule - a few questions

*To*: mathgroup at smc.vnet.net*Subject*: [mg81470] DynamicModule - a few questions*From*: "Maarten van der Burgt" <maarten.vanderburgt at icos.be>*Date*: Wed, 26 Sep 2007 06:21:40 -0400 (EDT)

Dear all, Below an example from the on-line help of DynamicModule, which I modified slightly to produce the quotient in the 4th InputField line. I have to seemingly simple questions: 1. How do I limit the number of digits after the decimal sign to 2 in the 'inputfield' for the quotient. - Round[100. a/ b]/100. is such an ugly contstruction and sometimes produces number like 1.2300000000001` - NumberForm[a/b,{100,2}] limits the number of digits after the decimal sign indeed to 2, but resuls in "" around the number. 2. The natural thing to do when entering a number in one of the inputfield is to press Enter. This produces a 2nd dynamic window. How to prevent this (the same happens with most results from Manipulate etc.) Thanks for your help, Maarten DynamicModule[{a = 1., b = 3.}, Deploy[Style[ Panel[Grid[ Transpose[{{Style["input a number", Red], Style["input another number", Red], "here is their sum", "their difference", "their quotient"}, {InputField[Dynamic[a], Number], InputField[Dynamic[b], Number], InputField[Dynamic[a + b], Enabled -> False], InputField[Dynamic[a - b], Enabled -> False], InputField[Dynamic[a/ b // N], Enabled -> False]}}], Alignment -> Right], ImageMargins -> 10], DefaultOptions -> {InputField -> {ContinuousAction -> True, FieldSize -> {{5, 30}, {1, Infinity}}}}]]]