How to use TextFields as "Number Fields"?

programming flash
1

Hello,

I have two TextFields on the stage. Actually I would like to use the two TextFields as Numbers. Therefore I can do some calculation of the two TextFields. Is it possible to do that? If yes, could you please provide some guidelines?

Thanks and best regards

Alex

2

One way would be to coerce the String value of the text into a Number, like so:

firstNumber = Number(myTextField.text);

You may also wish to look at using something like myTextField.restrict = “0-9”; to ensure only numbers are entered.

3

Hi dthought,

Thanks for your help. This is exactly what I need, and with one more extra bonus - myTextField.restrict = “0-9”;

I have one more question:

The stage has another dynamic TextField (output_txt). I wish to alert users that the myTextField is restrict to numbers only. When the users not enter numbers in the myTextField, a message (e.g. Only numbers are allowed) will appear in the output_txt TextField. How can I do that?

Thanks and best regards

Alex

4

Add a listener to myTextField for the Keyboard.KEY_DOWN event that checks that event.charCode is between 48 and 57:


import flash.events.KeyboardEvent;

myTextField.addEventListener(KeyboardEvent.KEY_DOWN, numberCheck);

function numberCheck(event:KeyboardEvent):void
{
    if (event.charCode >= 48 && event.charCode <= 57)
    {
        trace("User input is a number");
    }
    else
    {
        trace("User input is not a number");
    }
}
5

Hi all,

Thanks for your help. It works perfectly:)

Best regards

Alex

6

You can make use of validators in ActionScript 3.

<mx:NumberValidator source="{txtRent}" property=“text” required="true"
integerError=“Enter Integer value” minValue=“50” domain=“int”/>

You should use source as the textfield name. minValue is the minimum value that this textField will allow you. Same way you can also define maxValue.

Have fun!!
Manu.