//****************************************************************************//
//   Drag&Drop Control device             Version 0.85                        //
//   Original filename                    dragcontrol.as                      //
//   (c) Copyright 2001-2003              All Rights Reserved                 //
//   Sergey Moisevich (MSA)               webdevelop@softhome.net             //
//   Created 8/05/2003                    Last Modified 12/05/2003            //
//****************************************************************************//
//   Request                              Flash Player 6 or higher            //
//****************************************************************************//


// ** Create global control device

$ref = _global.DragDevice = {};
$ref._dragdocks = [];

// ** Public methods declaration

// ** Register Movieclip or component is Drag Dock Component
$ref.setDragDock = function(dock){
  this.removeDragDock(dock);
  this._dragdocks.push(dock);
}

// Unregister Drag Dock Component
$ref.removeDragDock = function(dock){
  var l = this._dragdocks.length;
  if (l) {
    var i = 0;
    do {
      if (this._dragdocks[i] == dock){
        this._dragdocks.splice(i,1);
        --l;
        return true;
      }
    } while (++i<l);
  }
  return false;
}

// ** Private methods declaration
// ** Do not use them directly !!!

$ref._getDockAtCursor = function(serv){
  var l = this._dragdocks.length;
  if (!l) return null;
  var i = 0, dock;
  var xm = _root._xmouse, ym = _root._ymouse;
  do {
    dock = this._dragdocks[i];
    if (dock[serv] && (dock!=this._saveDock) && dock.hitTest(xm,ym,true)) return dock;
  } while (++i<l);
  return null;
}

$ref.onMouseDown = function(){
  delete this._overDock;
  var dock = this._getDockAtCursor('onStartDrag');
  if (dock) {
    this._dragObject = {
      source: dock,
      clip: null,
      accept: false,
      x: dock._xmouse,
      y: dock._ymouse,
      kind: null
    };
    this.onMouseUp = this._mouseUp;
    this.onMouseMove = this._mouseMove;
  }
}

$ref._mouseUp = function(){
  delete this.onMouseUp;
  delete this.onMouseMove;
  delete this._saveDock;
  var dragObject = this._dragObject;
  var dock = this._overDock;
  dragObject.clip.stopDrag();
  if (dock && dragObject.accept) dock.onDragDrop(dragObject, dock._xmouse, dock._ymouse);
  dragObject.source.onEndDrag(dragObject);
  delete this._overDock;
  delete this._dragObject;
}

$ref._mouseMove = function(){
  var dragObject = this._dragObject;
  // ?????? ??????????????
  if (!dragObject.clip){
    // ????? ????????????? ???? ???????????
    dragObject.source.onStartDrag(dragObject);
    if (typeof(dragObject.clip)!='movieclip'){
      // trace('-> DragContol error: MovieClip for dragging is required.');
      delete this._dragObject;
      delete this.onMouseUp;
      delete this.onMouseMove;
      return ;
    }
    if (dragObject.kind) dragObject.clip.startDrag.apply(dragObject.clip, dragObject.kind);
    else dragObject.clip.startDrag(false);
    // ????????? ???? dock ???????? ????????????!!
    if (dragObject.source == dragObject.clip) this._saveDock = dragObject.source;
    if (!dragObject.clip.onMouseMove) dragObject.clip.onMouseMove = function(){ updateAfterEvent(); };
  }

  if (this._overDock && this._overDock.hitTest(_root._xmouse, _root._ymouse, true)){
    this._overDock.onDragMove(dragObject, this._overDock._xmouse, this._overDock._ymouse);
    return ;
  }
  
  var dock = this._getDockAtCursor('onDragEnter');
  if (!dock){
    // ???????? ?? ??????
    if (this._overDock) this._overDock.onDragLeave(dragObject, this._overDock._xmouse, this._overDock._ymouse);
    dragObject.accept = false;
    this._overDock = null;
  } else if (!this._overDock){
    // ?? ???? ??????????? ?????????
    this._overDock = dock;
    dock.onDragEnter(dragObject, dragDock._xmouse, dragDock._ymouse);
  } else if (this._overDock != dock){
    // ???? ???? ? ?????????? ? ????????? ? ??? ???????
    this._overDock.onDragLeave(dragObject, this._overDock._xmouse, this._overDock._ymouse);
    dragObject.accept = false;
    this._overDock = dock;
    dock.onDragEnter(dragObject, dragDock._xmouse, dragDock._ymouse);
  }
}

$ref.addProperty(
  'activated',
  function(){return this._activated;},
  function(f){
    f = Boolean(f);
    if (f) Mouse.addListener(this);
    else Mouse.removeListener(this);
    this._activated = f;
  }
);

$ref._activated = false;

ASSetPropFlags($ref, null, 1);
ASSetPropFlags(_global, 'DragDevice', 1);
delete $ref;

//usage
//Sorry, at present there is no more detailed help for this purpose. Try to use this example:

//#include "script/dragcontol.as"

function createBox (n, d, x, y){
  var box = _root.createEmptyMovieClip(n, d);
  with (box){
    _x = x;
    _y = y;
    beginFill (0xF1F1F1, 100);
    lineStyle (2, 0x00000, 100);
    moveTo (0, 0);
    lineTo (100, 0);
    lineTo (100, 100);
    lineTo (0, 100);
    lineTo (0, 0);
    endFill();
  }
}

createBox('dock1', 1, 50, 50);
createBox('dock2', 2, 250, 50);
dock2.createTextField ('tf', 1, 0, 0, 100, 100);
dock2.tf.selectable = false;
dock2.tf.text = '0';

DragDevice.setDragDock(dock1);
DragDevice.setDragDock(dock2);
DragDevice.activated = true;

dock1.onStartDrag = function (dragobj) {
  dragobj.clip = _root.createEmptyMovieClip('dragclip', 100);
  with (dragobj.clip){
    _x = this._x;
    _y = this._y;
    beginFill (0xFF00FF, 50);
    lineStyle (1, 0x00000, 100);
    moveTo (0, 0);
    lineTo (100, 0);
    lineTo (100, 100);
    lineTo (0, 100);
    lineTo (0, 0);
    endFill();
  }      
}

dock1.onEndDrag = function (dragobj) {
  if (! dragobj.accept) { dragobj.clip.removeMovieClip();  }
}
dock2.onDragEnter = function (dragobj) {
  if (dragobj.source = dock1) { dragobj.accept = true; }
  dragobj.accept ? dragobj.clip._alpha = 50 : dragobj.clip._alpha = 100;
}
dock2.onDragLeave = function (dragobj) { dragobj.clip._alpha = 100;}
dock2.onDragDrop = function (dragobj) {
  if (dragobj.accept) {
	  dragobj.clip.removeMovieClip(); 
	  this.tf.text = Number(this.tf.text) + 1;
  }
}