ACTIONSCRIPT 3 Developer’s Guide en

ACTIONSCRIPT 3.0 DEVELOPER’S GUIDE
Touch, multitouch and gesture input
Multitouch.inputMode=MultitouchInputMode.TOUCH_POINT;
var mySprite:Sprite = new Sprite();
var myTextField:TextField = new TextField();
mySprite.graphics.beginFill(0x336699);
mySprite.graphics.drawRect(0,0,40,40);
addChild(mySprite);
mySprite.addEventListener(TouchEvent.TOUCH_TAP, taphandler);
function taphandler(evt:TouchEvent): void {
myTextField.text = evt.stageX.toString;
myTextField.y = 50;
addChild(myTextField);
}
See the TouchEvent class for the properties available through the event object.
Note: Not all TouchEvent properties are supported in all runtime environments. For example, not all touch-enabled
devices are capable or detecting the amount of pressure the user is applying to the touch screen. So, the
TouchEvent.pressure property is not supported on those devices. Try testing for specific property support to ensure
your application works, and see “Troubleshooting” on page 592 for more information.
Touch event phases
Track touch events through various stages over and outside an InteractiveObject just as you do for mouse events. And,
track touch events through the beginning, middle, and end of a touch interaction. The TouchEvent class provides
values for handling touchBegin, touchMove, and touchEnd events.
For example, you could use touchBegin, touchMove, and touchEnd events to give the user visual feedback as they
touch and move a display object:
Multitouch.inputMode = MultitouchInputMode.TOUCH_POINT;
var mySprite:Sprite = new Sprite();
mySprite.graphics.beginFill(0x336699);
mySprite.graphics.drawRect(0,0,40,40);
addChild(mySprite);
var myTextField:TextField = new TextField();
myTextField.width = 200;
myTextField.height = 20;
addChild(myTextField);
mySprite.addEventListener(TouchEvent.TOUCH_BEGIN, onTouchBegin);
stage.addEventListener(TouchEvent.TOUCH_MOVE, onTouchMove);
stage.addEventListener(TouchEvent.TOUCH_END, onTouchEnd);
function onTouchBegin(event:TouchEvent) {
myTextField.text = "touch begin" + event.touchPointID;
}
function onTouchMove(event:TouchEvent) {
myTextField.text = "touch move" + event.touchPointID;
}
function onTouchEnd(event:TouchEvent) {
myTextField.text = "touch end" + event.touchPointID;
}
Last updated 6/6/2012
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