MACROMEDIA FLEX-FLEX ACTIONSCRIPT LANGUAGE Reference page 719

TextField.addListener()
Availability
Flash Player 6.
Usage
my_txt.addListener(listener:Object) : Void
Parameters
An object with an
listener
Returns
Nothing.
Description
Method; registers an object to receive notification when the
handlers have been invoked. When a text field changes or is scrolled, the
and
TextField.onScroller
event handlers of any objects registered as listeners. Multiple objects can be
onScroller
registered as listeners.
To remove a listener object from a text field, call
A reference to the text field instance is passed as a parameter to the
handlers by the event source. You can capture this data by putting a parameter in the event
handler method. For example, the following code uses
event handler. The parameter is then used in a
onScroller
instance name of the text field to the log file.
my_txt.onScroller = function(textfield_txt:TextField) {
trace(textfield_txt._name+" scrolled");
};
Example
The following example defines an
defines a new listener object,
This handler will be invoked when the text field
TextField.addListener
so that it will be notified when
this.createTextField("my_txt", this.getNextHighestDepth(), 10, 10, 100, 22);
my_txt.border = true;
my_txt.type = "input";
my_txt.onChanged = function(textfield_txt:TextField) {
trace(textfield_txt._name+" changed");
};
var txtListener:Object = new Object();
txtListener.onChanged = function(textfield_txt:TextField) {
trace(textfield_txt._name+" changed and notified myListener");
or
onChanged onScroller
event handlers are invoked, followed by the
handler for the input text field
onChanged
, and defines an
txtListener
to register the listener object
changes.
my_txt
event handler.
onChanged
TextField.removeListener()
onScroller
as the parameter that is passed to the
txt
method to write the
trace()
onChanged
is changed. The final line of code calls
my_txt
with the text field
txtListener
TextField.addListener()
and event
onScroller
TextField.onChanged
and
onChanged
.
and
onChanged
. It then
my_txt
handler for that object.
my_txt
719