123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112 |
- /**********************************************************
- Very minorly modified from the example by Tim Taylor
- http://tool-man.org/examples/sorting.html
-
- Added Coordinate.prototype.inside( northwest, southeast );
-
- **********************************************************/
- var Coordinates = {
- ORIGIN : new Coordinate(0, 0),
- northwestPosition : function(element) {
- var x = parseInt(element.style.left);
- var y = parseInt(element.style.top);
- return new Coordinate(isNaN(x) ? 0 : x, isNaN(y) ? 0 : y);
- },
- southeastPosition : function(element) {
- return Coordinates.northwestPosition(element).plus(
- new Coordinate(element.offsetWidth, element.offsetHeight));
- },
- northwestOffset : function(element, isRecursive) {
- var offset = new Coordinate(element.offsetLeft, element.offsetTop);
- if (!isRecursive) return offset;
- var parent = element.offsetParent;
- while (parent) {
- offset = offset.plus(
- new Coordinate(parent.offsetLeft, parent.offsetTop));
- parent = parent.offsetParent;
- }
- return offset;
- },
- southeastOffset : function(element, isRecursive) {
- return Coordinates.northwestOffset(element, isRecursive).plus(
- new Coordinate(element.offsetWidth, element.offsetHeight));
- },
- fixEvent : function(event) {
- event.windowCoordinate = new Coordinate(event.clientX, event.clientY);
- }
- };
- function Coordinate(x, y) {
- this.x = x;
- this.y = y;
- }
- Coordinate.prototype.toString = function() {
- return "(" + this.x + "," + this.y + ")";
- }
- Coordinate.prototype.plus = function(that) {
- return new Coordinate(this.x + that.x, this.y + that.y);
- }
- Coordinate.prototype.minus = function(that) {
- return new Coordinate(this.x - that.x, this.y - that.y);
- }
- Coordinate.prototype.distance = function(that) {
- var deltaX = this.x - that.x;
- var deltaY = this.y - that.y;
- return Math.sqrt(Math.pow(deltaX, 2) + Math.pow(deltaY, 2));
- }
- Coordinate.prototype.max = function(that) {
- var x = Math.max(this.x, that.x);
- var y = Math.max(this.y, that.y);
- return new Coordinate(x, y);
- }
- Coordinate.prototype.constrain = function(min, max) {
- if (min.x > max.x || min.y > max.y) return this;
- var x = this.x;
- var y = this.y;
- if (min.x != null) x = Math.max(x, min.x);
- if (max.x != null) x = Math.min(x, max.x);
- if (min.y != null) y = Math.max(y, min.y);
- if (max.y != null) y = Math.min(y, max.y);
- return new Coordinate(x, y);
- }
- Coordinate.prototype.reposition = function(element) {
- element.style["top"] = this.y + "px";
- element.style["left"] = this.x + "px";
- }
- Coordinate.prototype.equals = function(that) {
- if (this == that) return true;
- if (!that || that == null) return false;
- return this.x == that.x && this.y == that.y;
- }
- // returns true of this point is inside specified box
- Coordinate.prototype.inside = function(northwest, southeast) {
- if ((this.x >= northwest.x) && (this.x <= southeast.x) &&
- (this.y >= northwest.y) && (this.y <= southeast.y)) {
-
- return true;
- }
- return false;
- }
|