Moving AS3 Carat vertically

earlier struggling moving carat horizontally need move & down text field.

this virtual keyboard arrow controls done coded buttons.

 

 

 

 

heres example: have text field has 2 lines varrying amount of text, , our carat @ end of bottom line. goal move carat end of first line.

 

 

 

 

 

 

    var boop = textselect.text.length;

    var snoop = boop;

 

 

    // arrow controls move left , right

    function larw(event:mouseevent):void

    {

              snoop -=  1;

              stage.focus = textselect;

              textselect.setselection( snoop,snoop);

    }

   

    function rarw(event:mouseevent):void

    {

              snoop +=  1;

              stage.focus = textselect;

              textselect.setselection( snoop,snoop);

    }

   

    // moving

    function uarw(event:mouseevent):void

    {

   

    }

find position (using maxscrollv , loop) , use setselection again:

 

var index:int=indexf(your_tf,1);  // find end of line 1 in your_tf.  might want more massaging if don't want select white space.

your_tf.setselection(index,index)

 

// don't change function:

function indexf(tf:textfield,linenumber:int):int{

    var h:int = tf.height;

    tf.height = 5;

    var s:string = tf.text;

    tf.text = "";

    //trace(tf.maxscrollv);

    for(var i:int=0;i<s.length;i++){

        if(tf.maxscrollv<=linenumber){

            tf.appendtext(s.charat(i));

        } else {

            break;

        }

    }

    tf.text = s;

    tf.height = h;

    return i-1;

}

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