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| Tutorial |
When you use an event handler method with a button, the keyword this refers to the button
instance that calls the method. For example, the following code sends _level0.myButton to the
Output window:
myButton.onPress = function() {
trace(this);
}
To use a button event handler method to trigger a script:
1 On the Stage, select the button instance whose event you want to handle.
2 Enter an instance name in the Property inspector.
3 Select a frame, button, or movie clip to which to attach the method.
4 Choose Window > Actions to open the Actions panel if it isn’t already open.
5 In the Actions toolbox (at the left of the panel), click the Objects category, then click the
Movie category, the MovieClip category, and the Events category, and double-click one of the
MovieClip event handler methods.
6 Enter values for the following parameters:
• For the object parameter, enter the target path for the button whose event you want to handle.
• Pass any parameters needed by the function you will define. (In normal mode, enter these
parameters in the Parameters text box.)
7 Add actions inside the function to define the function.
The following code defines a function for the onPress method of the instance myButton that
triggers a trace action:
myButton.onPress = function() {
trace("onPress called!");
};
Using button events with movie clips to trigger scripts
You can use button events with button instances, but you can also use them with movie clip
instances to create button movie clips. Button movie clips combine the power of movie clips with
the control of button events. You can turn a movie clip into a button movie clip by assigning an
on handler to the movie clip instance, or by defining button event handler methods for an
instance. You can also create a new class and define event handler methods in the prototype object
of that class. (For information about defining methods in the prototype object,
All button events are triggered by user interaction: press, release, releaseOutside,
rollOver, rollOut, dragOver, dragOut, and keyPress. In the Actions toolbox, the MovieClip
object has an Events category containing methods that correspond to each button event, such as
onPress, onRelease, onReleaseOutside, onRollOver, onRollOut, onDragOver, onDragOut,
and onKeyPress.
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