AS3 - Use getStackTrace for debugging

You can use the getStackTrace method of an Error instance for general debugging purposes. This will output the execution stack like so:

Test condition @Error
at Untitled_fla::MainTimeline/testingSomething()
at Untitled_fla::MainTimeline/MyThing_fla::frame1()


code:

function testingSomething():void {
if (testCondition) {
//include a stack trace with our debug trace:
trace("Test condition @" + (new Error()).getStackTrace());
}
}

Depths in AS3

In AS3 it is easiest to work with depths in relative terms: Which element should be on top of the other?

Most people think this way anyway, the language reflects that now.


// get the depth of an existing sprite:
var depth:uint = getChildIndex(topMC);

//place mySprite under topMC:
addChildAt(mySprite, depth);

// or just:
addChildAt(mySprite, getChildIndex(topMC));

// directly set depth index:
setChildIndex(myMC, depth);

AS3 New TextField methods

There are a number of new methods on text fields that allow you to work with text in more interactive manner, including methods to convert character indexes to pixel positions, find lengths of lines and paragraphs, get line metrics (ascent, descent, leading, etc), and more.

//px position of chars & vice versa:
myTF.getCharBoundaries(index)
myTF.getCharIndexAtPoint(x,y)

//and a TON more:
myTF.getParagraphLength(index)
myTF.getLineIndexOfChar(index)

Flash - Double click event in AS3

AS3 adds a DOUBLE_CLICK event that uses the system setting for double click speed. Note that you will still get a click event before the double click event.

myButton.addEventListener(MouseEvent.DOUBLE_CLICK, handleDoubleClick);
myButton.doubleClickEnabled = true;

Flash - Create text link in AS3

HTML text fields no longer support "asfunction:" links. Instead they support "event:" links, which will generate a TextEvent.


myTextField.htmlText = "<a href="event:text">test</a>";
myTextField.addEventListener(TextEvent.LINK, handleLink);

function handleLink(evt:TextEvent):void {
trace(evt.text);
}

getURL in as3

As we all know, there's no more getURL in as3. Below is the replacement of getURL,

navigateToURL(new URLRequest("http://google.com"), "_blank");

cheers!

How to set cookies in flash - as3 (Flash SharedObject)

the codes:

var sharedObj:SharedObject = SharedObject.getLocal("anyname");
sharedObj.data.object1 = "whateverYouWantToStore";
sharedObj.data.object2 = "whateverYouWantToStore";
sharedObj.flush();
sharedObj.close();