Macromedia Flash Professional 8 UNLEASHED [Electronic resources] نسخه متنی

Cross-Object Events

I305 forms, when a user has finished entering data, he or she can click the submit button or press the Enter key while in the last text field. Well, Flash, by default, does not have the capability for users to simply press the Enter key and move on through an application or form. So how does a Flash developer overcome this dilemma? Use a Key object listener with the TextField object.

This example will create a text field that will listen for the Enter key to be pressed:

//create the listener with the text field
input_txt.onKeyDown = function(){
//check to make sure its the ENTER key being pressed
if(Key.isDown(Key.ENTER)){
//send a message to the output panel
trace("I detect an ENTER");
}
}
//add the text field as a listener
Key.addListener(input_txt);

The preceding code uses an event-handling method on a text field with a Key object event. Inside the event, it uses a conditional to check to see which key has been pressed and whether it is in fact the Enter key, and then a message is sent to the Output panel. And finally, it adds the text field as a listener to the Key object.