Question

creating variable name at runtime

Asked by: whatisittellme

I am trying to make a line tool in flash. Each time there is a single click, the line is drawn from the previous point to the current point where click is made. And a double-click will stop drawing the line.
My problem is when I start drawing a different line, I want to name the variable differently each time : like myLine1, myLine2, ...
maybe i should put them as an array of objects instead, i am not sure. (can array size be unlimited and how should we code for it ?)

function singleClickOnMap(event:MouseEvent):void{
	trace("mouse click on map");
	var point2:Point = new Point(event.stageX, event.stageY);
	latlng = map.getLatLngFromComponentXY(point2,map.zoom);
	trace(latlng.lat + "," + latlng.lng);
if (modeOfStage == "line"){
	param.points.push(latlng);
	var myLine1:Polyline = new Polyline(param, style);
	map.addOverlay(myLine1);
}
}

                                  
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Asked On
2009-06-11 at 07:38:48ID24483296
Tags

Actionscript 3

,

Flash

Topics

ActionScript

,

Adobe Flash

Participating Experts
2
Points
500
Comments
2

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Answers

 

by: courtthreePosted on 2009-06-11 at 16:42:23ID: 24607977

Try an array push method.

Declare an a new array outside of the function:

var aMyArray:Array = new Array();

Then, after you write each line, push the clip on to the array:

aMyArray.push(point2);

Then you can access each one by using array access notaton:

aMyArray[0], aMyArray[1] etc...

 

by: ruijietanPosted on 2009-07-05 at 19:39:50ID: 24782206

Arrays/Vectors would be more efficient, but if you're looking for a way to dynamically 'create a variable' on runtime as stated in the title you will have to make sure the class is dynamic (if you're using a document class).

You can use the array access operator to create variables dynamically, with something like this in your code:
this["varname"] = 9999;

Where you replace varname with another variable that keeps variable name that you want to create.

var numPoint:int = 4;
var varName:String = "point" + numPoint;
this[varName] = 9999;

this will create a variable named point4 and give it a value of 9999.

20120131-EE-VQP-002

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