MACROMEDIA FLASH MX 2004 - ACTIONSCRIPT, Reference Manual

Page: 90 / 816

90 Chapter 4: Handling Events
Scope of the “this” keyword
The
this
keyword refers to the object in the currently executing scope. Depending on what type
of event handler technique you’re using,
this
can refer to different objects.
Within an event handler or event listener function ,
this
refers to the object that defines the
event handler or event listener method. For example, in the following code
this
refers to
myClip
itself.
// onPress() event handler attached to _level0.myClip:
myClip.onPress = function () {
trace(this); // displays '_level0.myClip'
}
Within an
on()
handler attached to a movie clip
,
this
refers to the movie clip to which the
on()
handler is attached.
// Attached to movie clip named 'myClip'
on(press) {
trace(this); displays '_level0.myClip'
}
Within an
on()
handler attached to a button ,
this
refers to the Timeline that contains the
button.
// Attached to button on main Timeline
on(press) {
trace(this); // displays '_level0'
}