ScrollPane

import org.asapframework.ui.scrollbar.ScrollEvent;


/**

*/

class ui.ScrollPane extends MovieClip implements org.asapframework.ui.scrollbar.IScrollable {

    /**
    Amount of scrolling per step, in pixels.
    */
    private static var STEP_SIZE:Number = 16;
    
    private var mScrollPosition:Number = 0;

    private var contents_mc:MovieClip;
    private var mask_mc:MovieClip;


    public function onLoad () : Void {
        mScrollPosition = 0;
        update();
    }
    
    public function getTotalHeight () : Number {
        return contents_mc._height;
    }
    
    public function getVisibleHeight () : Number {
        return mask_mc._height;
    }
    
    public function getScrollPosition () : Number {
        return mScrollPosition;
    }
    
    public function getStepSize () : Number {
        return STEP_SIZE;
    }
    
    public function onScrollContent ( e:ScrollEvent ) : Void {
        // unused
    }
    
    public function scrollTo ( inPosition:Number ) : Void {
        mScrollPosition = inPosition;
        update();
    }
    
    private function update () : Void {
        contents_mc._y = mScrollPosition;
    }

}