DRK 3 : TextField / DataValidation Example 1
I have been getting some requests for some examples of the components included on DRK 3, so I am going to try and post a bunch over the coming days.
The first example is a simple one showing how to validate user input using the TextField component and Data Validation library.
And here is the code:
#include "com/macromedia/validation/DataValidation.as"
//set the function to be called when isValid is called.
//in this case it is the isDigit function from the DataValidation library
myTextField_txf.setValidationFunction("isDigit", DataValidation);
//set the default textfield icon to error.
myTextField_txf.setIcon("ftf_errorIcon");
//this is called when the validate button is pressed
validate_btn.onRelease = function()
{
//call isValid to see if user input is valid.
if(!myTextField_txf.isValid())
{
//if it is not, give an error and show the error icon.
msgBox_txf.text = "Invalid Input. Please enter a number.";
myTextField_txf.showIcon(true);
}
else
{
//if it is valid, make sure the icon is off.
msgBox_txf.text = "The input is a valid number";
myTextField_txf.showIcon(false);
}
}
You can view the on-line docs for the TextField component here.
You can find more information about the Flash UI Component Set 5 (which includes the TextField component) here.
You can find more information about DRK 3 here.
Post any requests for specific examples in the comments.
Try:
2e
Did I break it or what?
Or, do you count ‘e’ like the natural log…?
Phillip Kerman
29 Apr 03 at 10:40 pm
Okay, I’ll answer my own question. It appears to be a bug in Flash. Works fine in JavaScript (at least on IE Win).
I don’t know how I found that one.
Phillip
Phillip Kerman
30 Apr 03 at 11:20 pm
maybe 2e stands for “2 elevated”. anyway I think this should be invalid.
maxxxx
7 May 03 at 11:55 am
e is the exponent not natural log:
2e3 = 2000
2e4 = 20000
etc.
2e is the same as 2e0 which should evaluate to 2
This is not a bug. The e is not a method, function, or constant. It is actually a part of the number itself. Think of the following analogy:
“Can’t” is a word though it stands for “Cannot” – should we rule it out because it’s a contraction – no, of course not. 2e10 is a whole lot easier to write than 20000000000, and simply should not be excluded from this validation.
Samuel Christie
15 May 03 at 9:39 am
To be a little more technical, e is actually not the exponent of the preceeding number. It is, as you can see from my example, the exponent of 10. As in the following:
2e3 = 2*(10^3) = 2*1000 = 2000
Just thought I’d correct myself.
Samuel Christie
15 May 03 at 9:42 am
Geeze. It doesn’t work if I enter “pi” either.
Anonymous
21 May 03 at 5:31 pm