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/**
* $Id: mxRectangle.js,v 1.17 2010-12-08 12:46:03 gaudenz Exp $
* Copyright (c) 2006-2010, JGraph Ltd
*/
/**
* Class: mxRectangle
*
* Extends <mxPoint> to implement a 2-dimensional rectangle with double
* precision coordinates.
*
* Constructor: mxRectangle
*
* Constructs a new rectangle for the optional parameters. If no parameters
* are given then the respective default values are used.
*/
function mxRectangle(x, y, width, height)
{
mxPoint.call(this, x, y);
this.width = (width != null) ? width : 0;
this.height = (height != null) ? height : 0;
};
/**
* Extends mxPoint.
*/
mxRectangle.prototype = new mxPoint();
mxRectangle.prototype.constructor = mxRectangle;
/**
* Variable: width
*
* Holds the width of the rectangle. Default is 0.
*/
mxRectangle.prototype.width = null;
/**
* Variable: height
*
* Holds the height of the rectangle. Default is 0.
*/
mxRectangle.prototype.height = null;
/**
* Function: setRect
*
* Sets this rectangle to the specified values
*/
mxRectangle.prototype.setRect = function(x, y, w, h)
{
this.x = x;
this.y = y;
this.width = w;
this.height = h;
};
/**
* Function: getCenterX
*
* Returns the x-coordinate of the center point.
*/
mxRectangle.prototype.getCenterX = function ()
{
return this.x + this.width/2;
};
/**
* Function: getCenterY
*
* Returns the y-coordinate of the center point.
*/
mxRectangle.prototype.getCenterY = function ()
{
return this.y + this.height/2;
};
/**
* Function: add
*
* Adds the given rectangle to this rectangle.
*/
mxRectangle.prototype.add = function(rect)
{
if (rect != null)
{
var minX = Math.min(this.x, rect.x);
var minY = Math.min(this.y, rect.y);
var maxX = Math.max(this.x + this.width, rect.x + rect.width);
var maxY = Math.max(this.y + this.height, rect.y + rect.height);
this.x = minX;
this.y = minY;
this.width = maxX - minX;
this.height = maxY - minY;
}
};
/**
* Function: grow
*
* Grows the rectangle by the given amount, that is, this method subtracts
* the given amount from the x- and y-coordinates and adds twice the amount
* to the width and height.
*/
mxRectangle.prototype.grow = function(amount)
{
this.x -= amount;
this.y -= amount;
this.width += 2 * amount;
this.height += 2 * amount;
};
/**
* Function: getPoint
*
* Returns the top, left corner as a new <mxPoint>.
*/
mxRectangle.prototype.getPoint = function()
{
return new mxPoint(this.x, this.y);
};
/**
* Function: equals
*
* Returns true if the given object equals this rectangle.
*/
mxRectangle.prototype.equals = function(obj)
{
return obj.x == this.x &&
obj.y == this.y &&
obj.width == this.width &&
obj.height == this.height;
};
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