how to create up/down movement of sprite with as3 with a mouse - apache-flex

Question

I need to move a sprite only vertically on mouse move. How do I implement it with as3?
Thanks

Answer 1

Flash version
var s:Sprite = new Sprite();
s.x = 20;
s.graphics.beginFill(0xFF0000);
s.graphics.drawRect(0,0,20,20);
addChild(s);
stage.addEventListener(MouseEvent.MOUSE_MOVE,moveSprite);
function moveSprite(e:MouseEvent):void
{
s.y = e.localY;
}
Flex version
<mx:Canvas width="100" height="100">
<mx:mouseMove>
<![CDATA[
s.y = event.localY;
]]>
</mx:mouseMove>
<mx:Canvas id="s" backgroundColor="#ff0000" width="20" height="20"/>
</mx:Canvas>
Each of these you can paste in and will do what you said. it will create a 20x20 red box that is vertically the same as the mouse but fixed horizontally. The flex version your mouse has to be within the containing Canvas.

Answer 2

addEventListener(MouseEvent.CLICK, clickHandler);
function clickHandler(e:MouseEvent):void{
mySprite.y += amount;
}

Answer 3

Ok, dragging is a little more complicated. You need to define a rectangle for the bounds of the dragging. If you want to just drag along one axis then you make the rectangle have a width of 0. In this example I've restricted the amount of scrolling and and down to different numbers that you can change below.
import flash.events.MouseEvent;
import flash.geom.Rectangle;
mySprite.addEventListener(MouseEvent.MOUSE_DOWN, mouseDownHandler);
function mouseDownHandler(event:MouseEvent):void{
stage.addEventListener(MouseEvent.MOUSE_UP, mouseUpHandler);
var scrollUpAmount:int = 10;
var scrollDownAmount:int = 200;
var boundsRect:Rectangle = new Rectangle(mySprite.x,mySprite.y-scrollUpAmount,0,mySprite.y+scrollDownAmount);
mySprite.startDrag(false, boundsRect);
}
function mouseUpHandler(event:MouseEvent):void{
stage.removeEventListener(MouseEvent.MOUSE_UP, mouseUpHandler);
mySprite.stopDrag();
}