April 2006
Beginner
544 pages
14h 51m
English
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4.14. Changing a Movie Clip’s Location at Runtime with ActionScript
Problem
You want to relocate an element at runtime, through scripting.
Solution
Set a movie clip or button’s _x and _y properties with ActionScript.
Discussion
By default, when you position an element on the stage, it appears in the same location on the output .swf movie. However, it is possible to set the positioning at runtime by using ActionScript. ActionScript can see only certain kinds of elements in a movie. In order to control an element with ActionScript, it must be an object, which means it must be a movie clip, button, or dynamic or input text field. ActionScript cannot control draw vector art, graphic symbols, or imported bitmaps, unless they are enclosed in a movie clip or button.
Tip
In addition to the list specified in the preceding paragraph, Action-Script can control components and video objects.
In addition, for ActionScript to see one of these graphic elements, the element must have a unique identifier. You can give a movie clip, button, dynamic or input text field a unique identifier by selecting it and giving it an instance name in the Property inspector. After you specify a name for the object, you can address it using ActionScript.
You can control these objects through ActionScript using built-in events, properties, and methods:
- Events
Events refer to changes in the environment that the object is aware of. For example, a button is aware when it is pressed.
- Properties
Properties describe the object. ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.