Tag: AS3 Actionscript3 Events Timer
FlashDevelop3 R2 and the Flex 3.3 SDK video tutorial Part 03: Events, Interactivity, and Timer: the new setInterval.
by Brian Hodge on Mar.21, 2009, under Actionscript 3.0, FlashDevelop, Flex SDK
In part 03, first we talk about why the document class extends Sprite or MovieClip, which FlashDevelop automatically imports Sprite into your project and extends your document class with it.
Second, we talk about waiting for the document class to be added to the stage, so that we make access properties of the stage.
Third, import the required event MouseEvent, to handle mouse interactivity. We setup an event listener for when the end-user has pressed the mouse down while over “_sprite”, the square we created in part 02 of this series. We handled the mouse event with a nice TweenLite driven animation of the “_sprite” object.
Fourth, we imported the two classes for handling keyboard interaction. KeyboardEvent is used to listen for for the key-based events, and the Keyboard class maintains a list of static constants representing unsigned integers used to compare against the keyCode available to the method listener for the KeyboardEvent dispatch.
Fifth, and finally, we talk about the Timer object, which is the new setInterval. Although you can still use setInterval in Actionscript3, I prefer the Timer object. Maybe I prefer Timer because of its use of the new event flow, im not sure; although I can say, that I like that you can stop and start it with built in methods. In this example, we instantiate a Timer object, set it to fire every 1000ms (1 second) and then we listen for that event to be dispatched every second, and have a function fire each time. The function that fires has a simple trace, that when tested, loops over and over in the console.
Stay tuned for part 04, coming soon!
