Package | flash.events |
Class | public class TextEvent |
Inheritance | TextEvent Event Object |
Subclasses | DataEvent, ErrorEvent, IMEEvent |
Language Version: | ActionScript 3.0 |
Runtime Versions: | AIR 1.0, Flash Player 9, Flash Lite 4 |
TextEvent.LINK
and TextEvent.TEXT_INPUT
.
Related API Elements
Property | Defined By | ||
---|---|---|---|
bubbles : Boolean [read-only]
Indicates whether an event is a bubbling event. | Event | ||
cancelable : Boolean [read-only]
Indicates whether the behavior associated with the event can be prevented. | Event | ||
constructor : Object
A reference to the class object or constructor function for a given object instance. | Object | ||
currentTarget : Object [read-only]
The object that is actively processing the Event object with an event listener. | Event | ||
eventPhase : uint [read-only]
The current phase in the event flow. | Event | ||
target : Object [read-only]
The event target. | Event | ||
text : String
For a textInput event, the character or sequence of characters
entered by the user. | TextEvent | ||
type : String [read-only]
The type of event. | Event |
Method | Defined By | ||
---|---|---|---|
Creates an Event object that contains information about text events. | TextEvent | ||
[override]
Creates a copy of the TextEvent object and sets the value of each property to match that of the original. | TextEvent | ||
A utility function for implementing the toString() method in custom
ActionScript 3.0 Event classes. | Event | ||
Indicates whether an object has a specified property defined. | Object | ||
Checks whether the preventDefault() method has been called on the event. | Event | ||
Indicates whether an instance of the Object class is in the prototype chain of the object specified
as the parameter. | Object | ||
Cancels an event's default behavior if that behavior can be canceled. | Event | ||
Indicates whether the specified property exists and is enumerable. | Object | ||
Sets the availability of a dynamic property for loop operations. | Object | ||
Prevents processing of any event listeners in the current node and any subsequent nodes in
the event flow. | Event | ||
Prevents processing of any event listeners in nodes subsequent to the current node in the
event flow. | Event | ||
Returns the string representation of this object, formatted according to locale-specific conventions. | Object | ||
[override]
Returns a string that contains all the properties of the TextEvent object. | TextEvent | ||
Returns the primitive value of the specified object. | Object |
Constant | Defined By | ||
---|---|---|---|
LINK : String = "link" [static]
Defines the value of the type property of a link event object. | TextEvent | ||
TEXT_INPUT : String = "textInput" [static]
Defines the value of the type property of a textInput event object. | TextEvent |
text | property |
text:String
Language Version: | ActionScript 3.0 |
Runtime Versions: | AIR 1.0, Flash Player 9, Flash Lite 4 |
For a textInput
event, the character or sequence of characters
entered by the user. For a link
event, the text
of the event
attribute of the href
attribute of the
<a>
tag.
Implementation
public function get text():String
public function set text(value:String):void
Example ( How to use this example )
link
event is dispatched when
a user clicks the hypertext link:
import flash.text.TextField; import flash.events.TextEvent; var tf:TextField = new TextField(); tf.htmlText = "<a href='event:myEvent'>Click Me.</a>"; tf.addEventListener("link", clickHandler); addChild(tf); function clickHandler(e:TextEvent):void { trace(e.type); // link trace(e.text); // myEvent }
TextEvent | () | Constructor |
public function TextEvent(type:String, bubbles:Boolean = false, cancelable:Boolean = false, text:String = "")
Language Version: | ActionScript 3.0 |
Runtime Versions: | AIR 1.0, Flash Player 9, Flash Lite 4 |
Creates an Event object that contains information about text events. Event objects are passed as parameters to event listeners.
Parameterstype:String — The type of the event. Event listeners can access this information through the inherited type property. Possible values are:
TextEvent.LINK and TextEvent.TEXT_INPUT .
| |
bubbles:Boolean (default = false ) — Determines whether the Event object participates in the bubbling phase of the event flow. Event listeners can access this information through the inherited bubbles property.
| |
cancelable:Boolean (default = false ) — Determines whether the Event object can be canceled. Event listeners can access this information through the inherited cancelable property.
| |
text:String (default = " ") — One or more characters of text entered by the user. Event listeners can access this information through the text property.
|
Related API Elements
clone | () | method |
override public function clone():Event
Language Version: | ActionScript 3.0 |
Runtime Versions: | AIR 1.0, Flash Player 9, Flash Lite 4 |
Creates a copy of the TextEvent object and sets the value of each property to match that of the original.
ReturnsEvent — A new TextEvent object with property values that match those of the original.
|
toString | () | method |
override public function toString():String
Language Version: | ActionScript 3.0 |
Runtime Versions: | AIR 1.0, Flash Player 9, Flash Lite 4 |
Returns a string that contains all the properties of the TextEvent object. The string is in the following format:
[TextEvent type=value bubbles=value cancelable=value text=value]
String — A string that contains all the properties of the TextEvent object.
|
LINK | Constant |
public static const LINK:String = "link"
Language Version: | ActionScript 3.0 |
Runtime Versions: | AIR 1.0, Flash Player 9, Flash Lite 4 |
Defines the value of the type
property of a link
event object.
This event has the following properties:
Property | Value |
---|---|
bubbles | true |
cancelable | false ; there is no default behavior to cancel. |
currentTarget | The object that is actively processing the Event object with an event listener. |
target | The text field containing the hyperlink that has been clicked.
The target is not always the object in the display list
that registered the event listener. Use the currentTarget
property to access the object in the display list that is currently processing the event. |
text | The remainder of the URL after "event:" |
Related API Elements
Example ( How to use this example )
A text field is created and its content is set to an HTML-formatted string by
using the htmlText
property. The links are underlined for
easier identification by the user. (Adobe Flash Player changes the mouse
pointer only after the pointer is over the link.) To make sure that the user's click
invokes an ActionScript method, the URL of the link begins with the "event:"
string
and a listener is added for the TextEvent.LINK
event.
The linkHandler()
method that is triggered after the user clicks a
link manages all the link events for the text field. The first if statement checks the
text
property of the event, which holds the remainder of the URL after the
"event:"
string. If the user clicked the link for the operating system, the
name of the user's current operating system, taken from the system's Capabilities.os
property, is used to send the user to the designated website. Otherwise, the selected radius
size, passed by the event's text
property, is used to draw a circle below the text
field. Each time the user clicks the radius link, the previously drawn circle is cleared and a new
red circle with the selected radius size is drawn.
package { import flash.display.Sprite; import flash.events.TextEvent; import flash.errors.IOError; import flash.events.IOErrorEvent; import flash.system.Capabilities; import flash.net.navigateToURL; import flash.net.URLRequest; import flash.text.TextField; import flash.text.TextFieldAutoSize; import flash.display.Shape; import flash.display.Graphics; public class TextEvent_LINKExample extends Sprite { private var myCircle:Shape = new Shape(); public function TextEvent_LINKExample() { var myTextField:TextField = new TextField(); myTextField.autoSize = TextFieldAutoSize.LEFT; myTextField.multiline = true; myTextField.background = true; myTextField.htmlText = "Draw a circle with the radius of <u><a href=\"event:20\">20 pixels</a></u>.<br>" + "Draw a circle with the radius of <u><a href=\"event:50\">50 pixels</a></u>.<br><br>" + "<u><a href=\"event:os\">Learn about your operating system.</a></u><br>"; myTextField.addEventListener(TextEvent.LINK, linkHandler); this.addChild(myTextField); this.addChild(myCircle); } private function linkHandler(e:TextEvent):void { var osString:String = Capabilities.os; if(e.text == "os") { if (osString.search(/Windows/) != -1 ){ navigateToURL(new URLRequest("http://www.microsoft.com/"), "_self"); }else if (osString.search(/Mac/) != -1 ) { navigateToURL(new URLRequest("http://www.apple.com/"), "_self"); } else if (osString.search(/linux/i)!= -1) { navigateToURL(new URLRequest("http://www.tldp.org/"), "_self"); } } else { myCircle.graphics.clear(); myCircle.graphics.beginFill(0xFF0000); myCircle.graphics.drawCircle(100, 150, Number(e.text)); myCircle.graphics.endFill(); } } } }
TEXT_INPUT | Constant |
public static const TEXT_INPUT:String = "textInput"
Language Version: | ActionScript 3.0 |
Runtime Versions: | AIR 1.0, Flash Player 9, Flash Lite 4 |
Defines the value of the type
property of a textInput
event object.
Note: This event is not dispatched for the Delete or Backspace keys.
This event has the following properties:
Property | Value |
---|---|
bubbles | true |
cancelable | true ; call the preventDefault() method
to cancel default behavior. |
currentTarget | The object that is actively processing the Event object with an event listener. |
target | The text field into which characters are being entered.
The target is not always the object in the display list
that registered the event listener. Use the currentTarget
property to access the object in the display list that is currently processing the event. |
text | The character or sequence of characters entered by the user. |
Related API Elements
Example ( How to use this example )
Three text fields for the preliminary instructions, the user input, and the
warning (error) messages are created. An event listener is added to respond to
the user's text input by triggering the textInputHandler()
method.
(Every time the user enters text, a TextEvent.TEXT_INPUT
event is
dispatched.
Note: The text events are dispatched when a user enters characters
and not as a response to any keyboard input, such as backspace. To catch all
keyboard events, use a listener for the KeyboardEvent
event.)
The textInputHandler()
method controls and manages the user
input. The preventDefault()
method is used to prevent Adobe Flash Player
from immediately displaying the text in the input text field. The application is
responsible for updating the field. To undo the user's deletion or modification
to the characters already entered (the result
string), the content of the
input text field is reassigned to the result
string when a user enters
new characters. Also, to produce a consistent user experience, the setSelection()
method places the insertion point (a caret) after the last selected character in the text field.
The first if statement in the textInputHandler()
method checks
the input for the second and fifth character positions of the combination key,
which must be numbers. If the user input is correct, the updateCombination()
method is called and the (result
) combination key string is appended
with the user input. The updateCombination()
method also moves the insertion
point after the selected character. After the seven characters are entered,
the last if statement in the textInputHandler()
method changes type of the
inputTextField
text field from INPUT
to DYNAMIC
,
which means that the user can no longer enter or change any characters.
package { import flash.display.Sprite; import flash.text.TextField; import flash.text.TextFieldType; import flash.text.TextFieldAutoSize; import flash.events.TextEvent; public class TextEvent_TEXT_INPUTExample extends Sprite { private var instructionTextField:TextField = new TextField(); private var inputTextField:TextField = new TextField(); private var warningTextField:TextField = new TextField(); private var result:String = ""; public function TextEvent_TEXT_INPUTExample() { instructionTextField.x = 10; instructionTextField.y = 10; instructionTextField.background = true; instructionTextField.autoSize = TextFieldAutoSize.LEFT; instructionTextField.text = "Please enter a value in the format A#AA#AA,\n" + "where 'A' represents a letter and '#' represents a number.\n" + "(Note that once you input a character you can't change it.)" ; inputTextField.x = 10; inputTextField.y = 70; inputTextField.height = 20; inputTextField.width = 75; inputTextField.background = true; inputTextField.border = true; inputTextField.type = TextFieldType.INPUT; warningTextField.x = 10; warningTextField.y = 100; warningTextField.autoSize = TextFieldAutoSize.LEFT; inputTextField.addEventListener(TextEvent.TEXT_INPUT, textInputHandler); this.addChild(instructionTextField); this.addChild(inputTextField); this.addChild(warningTextField); } private function textInputHandler(event:TextEvent):void { var charExp:RegExp = /[a-zA-z]/; var numExp:RegExp = /[0-9]/; event.preventDefault(); inputTextField.text = result; inputTextField.setSelection(result.length + 1, result.length + 1); if (inputTextField.text.length == 1 || inputTextField.text.length == 4) { if(numExp.test(event.text) == true) { updateCombination(event.text); } else { warningTextField.text = "You need a single digit number."; } }else { if(charExp.test(event.text) == true) { updateCombination(event.text); } else { warningTextField.text = "You need an alphabet character."; } } if(inputTextField.text.length == 7) { inputTextField.type = TextFieldType.DYNAMIC; instructionTextField.text = "CONGRATULATIONS. You've done."; } } private function updateCombination(s:String):void { warningTextField.text = ""; result += s; inputTextField.text = result; inputTextField.setSelection(result.length + 1, result.length + 1); } } }
- The example declares constants for two URLs to be used later.
- The example declares two variables of type TextField to be used later.
- The class constructor calls the following two methods:
init()
initializes the TextField objects and add event listeners to them.draw()
adds the TextFields to the display list and assigns the text to be displayed.
- The listeners
linkHandler()
andtextInputHandler()
react to the events according to their event type. ThelinkHandler()
method opens a web browser if one is not open already and navigates to the clicked URL. ThetextInputHandler()
method simply displays information every time a key is pressed in the associated text field.
Note: The domain shown in this example is fictitious and [yourDomain]
should be replaced with a real domain.
package { import flash.display.Sprite; import flash.text.TextField; import flash.text.TextFieldType; import flash.text.TextFieldAutoSize; import flash.events.TextEvent; import flash.events.TextEvent; import flash.net.URLRequest; import flash.net.navigateToURL; public class TextEventExample extends Sprite { private const DOMAIN_1_URL:String = "http://www.[yourDomain].com"; private const DOMAIN_2_URL:String = "http://www.[yourDomain].com"; private var linkTxt:TextField; private var textInputTxt:TextField; public function TextEventExample() { init(); draw(); } private function init():void { linkTxt = new TextField(); linkTxt.addEventListener(TextEvent.LINK, linkHandler); linkTxt.height = 60; linkTxt.autoSize = TextFieldAutoSize.LEFT; linkTxt.multiline = true; textInputTxt = new TextField(); textInputTxt.addEventListener(TextEvent.TEXT_INPUT, textInputHandler); textInputTxt.type = TextFieldType.INPUT; textInputTxt.background = true; textInputTxt.border = true; textInputTxt.height = 20; } private function draw():void { addChild(linkTxt); linkTxt.htmlText += createLink(DOMAIN_1_URL, "Click to go to first domain"); linkTxt.htmlText += "<br />"; linkTxt.htmlText += createLink(DOMAIN_2_URL, "Click to go to second domain"); addChild(textInputTxt); textInputTxt.y = linkTxt.height; textInputTxt.text = "type here"; } private function createLink(url:String, text:String):String { var link:String = ""; link += "<font color='#0000FF'>"; link += "<u>"; link += "<b>"; link += "<a href='event:" + url + "'>" + text + "</a>"; link += "</b>"; link += "</u>"; link += "</font>"; return link; } private function linkHandler(e:TextEvent):void { var request:URLRequest = new URLRequest(e.text); navigateToURL(request); } private function textInputHandler(e:TextEvent):void { trace(">> ============================"); trace(">> e.text: " + e.text); trace(">> textInputTxt.text: " + textInputTxt.text); } } }
Thu Dec 6 2018, 01:12 PM -08:00