ACTIONSCRIPT 3 Developer’s Guide en

ACTIONSCRIPT 3.0 DEVELOPER’S GUIDE
Using the TextField class
var myTextField:TextField = new TextField();
myTextField.text = "Please select the TEXT IN ALL CAPS to see the index values for the first
and last letters.";
myTextField.autoSize = TextFieldAutoSize.LEFT;
addChild(myTextField);
addEventListener(MouseEvent.MOUSE_UP, selectText);
function selectText(event:MouseEvent):void
{
trace("First letter index position: " + myTextField.selectionBeginIndex);
trace("Last letter index position: " + myTextField.selectionEndIndex);
}
You can apply a collection of TextFormat object properties to the selection to change the text appearance. For more
information about applying a collection of TextFormat properties to selected text, see “Formatting ranges of text
within a text field” on page 383.
Capturing text input
Flash Player 9 and later, Adobe AIR 1.0 and later
By default, the type property of a text field is set to dynamic. If you set the type property to input using the
TextFieldType class, you can collect user input and save the value for use in other parts of your application. Input text
fields are useful for forms and any application that wants the user to define a text value for use elsewhere in the
program.
For example, the following code creates an input text field called myTextBox. As the user enters text in the field, the
textInput event is triggered. An event handler called textInputCapture captures the string of text entered and
assigns it a variable. Flash Player or AIR displays the new text in another text field, called myOutputBox.
package
{
import flash.display.Sprite;
import flash.display.Stage;
import flash.text.*;
import flash.events.*;
public class CaptureUserInput extends Sprite
{
private var myTextBox:TextField = new TextField();
private var myOutputBox:TextField = new TextField();
private var myText:String = "Type your text here.";
public function CaptureUserInput()
{
captureText();
}
public function captureText():void
{
myTextBox.type = TextFieldType.INPUT;
myTextBox.background = true;
addChild(myTextBox);
Last updated 6/6/2012
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