Side scrolling artbased platform game

[buzza_gts]

Hey guys,
Im currently making a side scrolling platform game and currently having troubles with the side scrolling. I am using this code,

if (Key.isDown(Key.LEFT)) {
		_root.backGround._x += 1;
	}
	if (Key.isDown(Key.RIGHT)) {
		_root.backGround._x -= 1;
	}

to scroll the background. It works fine except for the fact that after you walk in one direction for about 2 seconds the charecter leaves the screen. I'v played around with all the differant speeds but to no aveil.
Any help\comments would be apprieciated.

[CyanBlue]

Um... You should have some sort of if statement that checks the condition... Check my sample...

keyListener = new Object();
keyListener.onKeyDown = function()
{
    if (Key.isDown(Key.LEFT))
    {
        if (_root.Background._x < 500)
        {
            _root.Ball._rotation -= 10;
            _root.Background._x += 1;
        }
    }
    if (Key.isDown(Key.RIGHT))
    {
        if (_root.Background._x > -200)
        {
            _root.Ball._rotation += 10;
            _root.backGround._x -= 1;
        }
    }
};
Key.addListener(keyListener);

[buzza_gts]

Would I be correct in saying that the 500 in:

if (_root.Background._x < 500)

relates to the size of the stage?

[CyanBlue]

I think those numbers, 500 and -200, varies depending on the setup you have in your movie...

[buzza_gts]

Nup cant seem to get this darn thing to work, here is were im trying to slot in the code:

// Key pressed while CAPTAIN is walking
function KeyPressHorizontalWalk() {
	// Next is the code to scroll the background.
	keyListener = new Object();
	keyListener.onKeyDown = function() {
		if (Key.isDown(Key.LEFT)) {
			if (_root.backGround._x<20) {
				_root.backGround._x += 1;
			}
		}
		if (Key.isDown(Key.RIGHT)) {
			if (_root.backGround._x>-20) {
				_root.backGround._x -= 1;
			}
		}
	};
	Key.addListener(keyListener);
	// Code which makes Captain America Walk.
	if (Key.isDown(Key.LEFT)) {
		move(-walkSpeed);
		_xscale = -100;
		distance = -4;
	} else if (Key.isDown(Key.RIGHT)) {
		move(walkSpeed);
		_xscale = 100;
		distance = 4;
	}
}
// Keys pressed while CAPTAIN is jumping/falling
function KeyPressHorizontalJump() {
	if (Key.isDown(Key.LEFT)) {
		move(-jumpSpeed);
		_xscale = -100;
		distance = -4;
	} else if (Key.isDown(Key.RIGHT)) {
		move(jumpSpeed);
		_xscale = 100;
		distance = 4;
	}
}
stop();

I just dont get it - any advice?

Thanks

[CyanBlue]

Well... There is no way I could solve your problem with that much of information, but I could at least trim your code...

// Key pressed while CAPTAIN is walking
// This Key Listener needs to be defined only once...
keyListener = new Object();
keyListener.onKeyDown = function()
{
    if (Key.isDown(Key.LEFT))
    {
        if (_root.backGround._x < 20)
        {
            _root.backGround._x += 1;
            // You will need to specify
            // the path for the following...
            move(-walkSpeed);
            _xscale = -100;
            distance = -4;
        }
    }
    if (Key.isDown(Key.RIGHT))
    {
        if (_root.backGround._x > -20)
        {
            _root.backGround._x -= 1;
            // You will need to specify
            // the path for the following...
            move(walkSpeed);
            _xscale = 100;
            distance = 4;
        }
    }
};
Key.addListener(keyListener);
function KeyPressHorizontalWalk()
{
    /*
        I have moved your codes in if block
        because that's where the code belongs...
        You do not need this KeyPressHorizontalWalk()
        function actually since this is being
        calculated with the keyListener...
            // Next is the code to scroll the background.
            // Code which makes Captain America Walk.
            if (Key.isDown(Key.LEFT))
            {
            }
            else if (Key.isDown(Key.RIGHT))
            {
            }
    */
}
// Keys pressed while CAPTAIN is jumping/falling
function KeyPressHorizontalJump()
{
    /*
        You don't need this function either...
        I don't understand why you need to
        repeat the same code over and over...
        
        What is the difference between 
        KeyPressHorizontalWalk() function and
        KeyPressHorizontalJump() function???
        
            if (Key.isDown(Key.LEFT))
            {
                move(-jumpSpeed);
                _xscale = -100;
                distance = -4;
            }
            else if (Key.isDown(Key.RIGHT))
            {
                move(jumpSpeed);
                _xscale = 100;
                distance = 4;
            }
    */
}
stop();

Check out the comments that I have made and answer those questions since you will need to clarify them for whoever helps you... I think you need to create a sample file and have it uploaded so that other people can take a look at it...

I am off to bed now, but I think somebody else will take a look at your question...

Good luck...