Think for example that we've only 4 visible lines for a textField t. How to prevent that users will write or just paste more text overfolwing on line 5?
below the solution I adopted:
1 I add a custom textfield with some height;
the first trouble is how many line the textfield is if this text is empty? (i just add a recursive function for understand this) check at getLastVisibleLine.
2 I slice each character under the last visible line.
package
{
import flash.text.TextField;
import flash.text.TextFieldType;
import flash.text.TextFormat;
import flash.events.Event;
import flash.events.TextEvent;
public class TextFieldUtil extends Sprite {
public function TextFieldUtil() { }
//undestand how many lines we can insert in a textField without scrolling
public static function getLastVisibleLine(t:TextField):int {
t.type = TextFieldType.INPUT;
var current_string:String = t.text;
t.text = "";
var l:int = 0;
var scrld:Boolean = false;
t.addEventListener(Event.SCROLL, checkScrl);
function checkScrl(e:Event) {
e.target.scrollV = 0;
t.text = current_string;
scrld = true;
}
while (scrld == false) {
l++
t.appendText("\n");
}
t.removeEventListener(Event.SCROLL, checkScrl);
return l;
}
public static function createCustomTextField(x:Number, y:Number, width:Number, height:Number):TextField {
var t:TextField = new TextField();
t.type = TextFieldType.INPUT;
t.mouseWheelEnabled = false
t.wordWrap = true;
t.multiline = true;
t.x = x;
t.y = y;
t.width = width;
t.height = height;
//t.background = true;
//t.border = true;
var visiblesLines:int = getLastVisibleLine(t);
t.addEventListener(Event.CHANGE, function (e:Event) { // lock text insertion and delete exceeding characters.
var t:TextField = e.target as TextField;
if (t.numLines > visiblesLines) {
t.type = "dynamic";
}
while (t.numLines > visiblesLines){
var current_string:String = t.text;
t.text = current_string.slice(0, -1);
}
t.type = "input";
});
return t;
}
}
}
I wrote also a version with styles and special textFormat. Maybe I'll post in the future.
Some days ago I got an interesting article. An older Nokia 1100 has been bought from hackers, because this telephone has the elusive ability to clone a SIM remotely, which were then used to steal bank codes TAN, (that’s sort of temporary password for access to current accounts). The news is that this phone was sold at $ 25,000, and… I already have this old phone,
So that, I thought... bang!!! Now I sell it and I buy a car. Needless to say, the news is the newest hoax running on the web. 
viene sostituito
