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/* This notice must be untouched at all times.

Open-jACOB Draw2D
The latest version is available at
http://www.openjacob.org

Copyright (c) 2006 Andreas Herz. All rights reserved.
Created 5. 11. 2006 by Andreas Herz (Web: http://www.freegroup.de )

LICENSE: LGPL

This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License (LGPL) as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.

This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA,
or see http://www.gnu.org/copyleft/lesser.html
*/

/**
 * 
 * @version 0.9.14
 * @author Andreas Herz
 * @constructor
 */
draw2d.CommandMove=function(/*:draw2d.Figure*/ figure, /*:int*/ x, /*:int*/ y)
{
   draw2d.Command.call(this,"move figure");
   this.figure = figure;
   this.oldX   = x;
   this.oldY   = y;
   this.oldCompartment = figure.getParent();
}

draw2d.CommandMove.prototype = new draw2d.Command;
/** @private **/
draw2d.CommandMove.prototype.type="CommandMove";

/**
 * Execute the command the first time
 * 
 **/
draw2d.CommandMove.prototype.setPosition=function(/*:int*/ x, /*:int*/ y)
{
   this.newX = x;
   this.newY = y;
   this.newCompartment = this.figure.workflow.getBestCompartmentFigure(x,y,this.figure);
}

/**
 * Returns [true] if the command can be execute and the execution of the
 * command modify the model. A CommandMove with [startX,startX] == [endX,endY] should
 * return false. <br>
 * the execution of the Command doesn't modify the model.
 *
 * @type boolean
 **/
draw2d.CommandMove.prototype.canExecute=function()
{
  // return false if we doesn't modify the model => NOP Command
  return this.newX!=this.oldX || this.newY!=this.oldY;
}

/**
 * Execute the command the first time
 * 
 **/
draw2d.CommandMove.prototype.execute=function()
{
   this.redo();
}

/**
 * Undo the command
 *
 **/
draw2d.CommandMove.prototype.undo=function()
{
   this.figure.setPosition(this.oldX, this.oldY);
   if(this.newCompartment!=null)
      this.newCompartment.removeChild(this.figure);

   if(this.oldCompartment!=null)
      this.oldCompartment.addChild(this.figure);

   this.figure.workflow.moveResizeHandles(this.figure);
}

/** Redo the command after the user has undo this command
 *
 **/
draw2d.CommandMove.prototype.redo=function()
{
   this.figure.setPosition(this.newX, this.newY);
   if(this.oldCompartment!=null)
      this.oldCompartment.removeChild(this.figure);

   if(this.newCompartment!=null)
      this.newCompartment.addChild(this.figure);

   this.figure.workflow.moveResizeHandles(this.figure);
}