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## ChopboxConnectionAnchor.js

#### Summary

No overview generated for 'ChopboxConnectionAnchor.js'

Class Summary
draw2d.ChopboxConnectionAnchor |

    /* 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
    */

    /**
     * The ChopboxAnchor's location is found by calculating the intersection of a line drawn
     * from the center point of its owner's box (the parent of the connection port) to a reference
     * point on that box. A Connection using the ChopBoxAnchor will be oriented such that they
     * point to their port owner's center.
     *
     * @version 0.9.14
     * @author Andreas Herz
     * @constructor
     */
    draw2d.ChopboxConnectionAnchor=function(/*:draw2d.Figure*/ owner)
    {
       draw2d.ConnectionAnchor.call(this,owner);
    }

    draw2d.ChopboxConnectionAnchor.prototype = new draw2d.ConnectionAnchor;
    /** @private **/
    draw2d.ChopboxConnectionAnchor.prototype.type="ChopboxConnectionAnchor";

    /**
     * Returns the location where the Connection should be anchored in absolute coordinates.
     * The anchor may use the given reference Point to calculate this location.
     * @param reference The reference Point in absolute coordinates
     * @return The anchor's location
     */
    draw2d.ChopboxConnectionAnchor.prototype.getLocation=function(/*:draw2d.Point*/ reference)
    {
       var r = new draw2d.Dimension();
       r.setBounds(this.getBox());
       r.translate(-1, -1);
       r.resize(1, 1);

       var centerX = r.x + r.w/2;
       var centerY = r.y + r.h/2;

       if (r.isEmpty() || (reference.x == centerX && reference.y == centerY))
          return new /*NAMESPACE*/Point(centerX, centerY);  //This avoids divide-by-zero

       var dx = reference.x - centerX;
       var dy = reference.y - centerY;

       //r.width, r.height, dx, and dy are guaranteed to be non-zero.
       var scale = 0.5 / Math.max(Math.abs(dx) / r.w, Math.abs(dy) / r.h);

       dx *= scale;
       dy *= scale;
       centerX += dx;
       centerY += dy;

       return new draw2d.Point(Math.round(centerX), Math.round(centerY));
    }

    /**
     * Returns the bounds of this Anchor's owner.  Subclasses can override this method
     * to adjust the box. Maybe you return the box of the port parent (the parent figure)
     *
     * @return The bounds of this Anchor's owner
     */
    draw2d.ChopboxConnectionAnchor.prototype.getBox=function()
    {
      return this.getOwner().getParent().getBounds();
    }

    /**
     * Returns the bounds of this Anchor's owner.  Subclasses can override this method
     * to adjust the box. Maybe you return the box of the port parent (the parent figure)
     *
     * @return The bounds of this Anchor's owner
     */
    draw2d.ChopboxConnectionAnchor.prototype.getReferencePoint=function()
    {
      return this.getBox().getCenter();
    }

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Documentation generated by JSDoc on Thu Feb 7 23:45:47 2008