AS3 scroll animation horiziontally

The code that you have is telling an object named "scrollNumbers" to move either to the left or to the right by 20 pixels every time one of those functions is called. I don't know what "scrollNumbers" is in your image, so I don't know what is supposed to move.

Regardless, you want to change a single event movement to a continuous movement. To do that you need to change the way that the mouse event controls what is happening. One way to do that is to use a mouseDown event to start the movement and a mouseUp event to stop the movement.

Here's a simple example:

-------------------------------

// these two variables control the movement...

var movingLeft:Boolean = false;

var movingRight:Boolean = false;

leftScroll.addEventListener(MouseEvent.MOUSE_DOWN, RIGHT);

leftScroll.addEventListener(MouseEvent.MOUSE_UP, stopMoving);

stage.addEventListener(Event.ENTER_FRAME,moveMarker);

rightScroll.addEventListener(MouseEvent.MOUSE_DOWN, LEFT);

rightScroll.addEventListener(MouseEvent.MOUSE_UP,stopMoving);

// the mouse down event changes the value of the variable

function RIGHT(event:MouseEvent):void

{

    movingRight = true;  

}

function LEFT(event:MouseEvent):void

{

    movingLeft = true;

}

// the mouse up event changes the value of the variables back to false

function stopMoving(event:MouseEvent):void {

    movingLeft = false;

    movingRight = false;

}

// this function does all the work, if the variable for left or right movement is true

// then the scrollNumbers object will move one pixel at a time

function moveMarker(event:Event):void {

    if(movingLeft && scrollNumbers.x <= 28) {

         scrollNumbers.x ++;

    }

    if(movingRight && scrollNumbers.x >= -255) {

          scrollNumbers.x --;

    }

}

-------------------------------

You will probably need to adapt/change this to meet your needs.

I would suggest getting TweenMax/Lite from Greensock.com and then from there, you could just replace the line that jumps the x value by 20 with a tween command. Like so:

  if (scrollNumbers.x <= 28){

        scrollNumbers.x += 20;

to

  if (scrollNumbers.x <= 28){

        TweenMax.to(scrollNumbers, 2, {x:"20"});

In TweenMax you can use a string like shown, and it'll move the object relative to it's current position. If you just said 20, it would move it to an x pos of 20.

What you need to do depends on what you mean when you say you would like it to glide/scroll thru.  You probably want to look into using the Tween class or one of the better 3rd party tweening classes to accomplish whatever that is.