GUI Rotation

I use script to mouse zooming GUI window pressing button. Is it possible to make another button to rotate GUI window following mouse position? This is the script:

 var btnTexture:Texture;
 private var rtxt : float;
 private var txtiw : float;
 private var pressed:boolean = false;
 private var pressed2:boolean = false;
 private var recordMouseX:boolean = false;
 var ix = 5;
 var iy = 5;
 var bx = 25;
 var by = 25;
 var dbx =5;
 var dby =5;
 
 private var windowRect : Rect;
 
 
 private var hx : float;
 private var hy : float;
 private var hx2 : float;
 private var hy2 : float;
 private var hx3 : float;
 private var hy3 : float;
 
 private var mpx : float;
 private var mpy : float;
 private var mix : float;
 private var miy : float;
 
 function Start () {
 rtxt = (btnTexture.width/btnTexture.height);
 txtiw = Screen.width/2;
 
 hx = txtiw;
 hy = txtiw/rtxt;
 windowRect = Rect (ix, iy, hx, hy);
 }
 
 function Update () {
 
    if (Input.GetMouseButtonDown(0)){
 
     pressed = true;
 mix = mpx ;
 miy = mpy ;
 hx3 = hx;
 hy3 = hx/rtxt;
 }else if(Input.GetMouseButtonUp(0)){
     pressed = false;
     pressed2 = false;
 
     }
 
 
 ix = windowRect.x;
 iy = windowRect.y; 
 hx2 = hx3 + mpx - mix ;
 hy2 = hx2/rtxt;
 windowRect = Rect (ix, iy, hx, hy);
 }
 
 function OnGUI () {
 
     windowRect = GUI.Window (0, windowRect, DoMyWindow, "");
     var  mp : Event = Event.current;
 
      print( windowRect.x+ "   mouseX "+ mpx);
 
 
      mpx = mp.mousePosition.x;
      mpy = mp.mousePosition.y; 
 
 }
 
 
 function DoMyWindow (windowID : int){ 
     GUI.DragWindow (Rect (0,0, windowRect.width - bx -dbx, windowRect.height));
     GUI.DragWindow (Rect (0,0, windowRect.width, windowRect.height - by-dby));
     GUI.DrawTexture(Rect(0,0,hx,hy), btnTexture, ScaleMode.ScaleToFit, false, 0f);
 
     var rect = Rect (windowRect.width - bx - dbx, windowRect.height-by -dby,bx,by);
 
     if(windowRect.width<=bx +(dbx *2)  ){
        windowRect.width = bx+(dbx *2);
 
     }
          if( windowRect.height<=by+(dby*2) + 15 ){
        windowRect.height=by+(dby*2) +15;
 
 
     }
 
     if (pressed && (GUI.RepeatButton (rect, "+")) ){
    recordMouse = true;
        pressed2 = true;
     hx = hx2;
     hy = hy2;
 
     }else if(pressed && pressed2 &&  !rect.Contains(Input.mousePosition) ){
        hx = hx2;
        hy = hy2;
        } else if(!pressed ){
          GUI.RepeatButton (rect, "+");
        }else{
           GUI.RepeatButton (rect, "+");
        }
 }