498
ActionScript classes
The movie clip must have focus for the onKeyDown event handler to work. Add the
following ActionScript to set input focus:
my_mc.tabEnabled = true;
my_mc.focusEnabled = true;
Selection.setFocus(my_mc);
When you tab to the movie clip and press a key,
key was pressed
is displayed in the Output
panel. However, this does not occur after you move the mouse, because the movie clip loses
focus. Therefore, you should use
Key.onKeyDown
in most cases.
See also
getAscii (Key.getAscii method)
,
getCode (Key.getCode method)
,
focusEnabled
(MovieClip.focusEnabled property)
,
setFocus (Selection.setFocus method)
,
onKeyDown (Key.onKeyDown event listener)
,
onKeyUp (MovieClip.onKeyUp
handler)
onKeyUp (MovieClip.onKeyUp handler)
onKeyUp = function() {}
Invoked when a key is released. The
onKeyUp
event handler is invoked with no parameters.
You can use the
Key.getAscii()
and
Key.getCode()
methods to determine which key was
pressed. You must define a function that executes when the event handler is invoked. You can
define the function on the Timeline or in a class file that extends the MovieClip class or is
linked to a symbol in the library.
The
onKeyUp
event handler works only if the movie clip has input focus enabled and set.
First, the
MovieClip.focusEnabled
property must be set to true for the movie clip. Then,
the clip must be given focus. This can be done either by using
Selection.setFocus()
or by
setting the Tab key to navigate to the clip.
If
Selection.setFocus()
is used, the path for the movie clip must be passed to
Selection.setFocus()
. It is very easy for other elements to take the focus back after the
mouse is moved.
Availability:
ActionScript 1.0; Flash Lite 2.0
Example
The following example defines a function for the
onKeyUp
method that sends a
trace()
action to the Output panel:
my_mc.onKeyUp = function () {
trace ("onKey called");
}
Summary of Contents for FLASHLITE2 ACTIONSCRIPT-LANGUAGE
Page 1: ...Flash Lite 2 x ActionScript Language Reference...
Page 22: ...22 Contents...
Page 244: ...244 ActionScript language elements...
Page 760: ...760 ActionScript classes...
