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/*
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* jQuery-busy v1.0.3
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* Copyright 2010 Tomasz Szymczyszyn
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*
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* Examples available at:
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* http://kammerer.boo.pl/code/jquery-busy
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*
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* This plug-in is dual licensed under the MIT and GPL licenses:
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* http://www.opensource.org/licenses/mit-license.php
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* http://www.gnu.org/licenses/gpl.html
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*/
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(function($) {
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// Helper object factory
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function Busy(options) {
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this.options = $.extend({}, Busy.defaults, options);
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};
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// Remembers currently "busied" targets along with options
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Busy.instances = [];
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Busy.repositionAll = function() {
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for (var i = 0; i < Busy.instances.length; i++) {
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if (! Busy.instances[i])
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continue;
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var options = Busy.instances[i].options;
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new Busy(options).positionImg($(Busy.instances[i].target), $.data(Busy.instances[i].target, "busy"), options.position);
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}
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};
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Busy.prototype.hide = function(targets) {
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targets.each(function() {
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var busyImg = $.data(this, "busy");
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if (busyImg)
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busyImg.remove();
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$(this).css("visibility", "");
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$.data(this, "busy", null);
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for (var i = 0; i < Busy.instances.length; i++)
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if (Busy.instances[i] != null && Busy.instances[i].target == this)
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Busy.instances[i] = null;
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});
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};
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Busy.prototype.show = function(targets) {
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var that = this;
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targets.each(function() {
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if ($.data(this, "busy"))
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return;
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var target = $(this);
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var busyImg = that.buildImg();
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busyImg.css("visibility", "hidden");
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busyImg.load(function() {
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that.positionImg(target, busyImg, that.options.position);
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busyImg.css("visibility", "");
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});
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$("body").append(busyImg);
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if (that.options.hide)
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target.css("visibility", "hidden");
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$.data(this, "busy", busyImg);
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Busy.instances.push({ target : this, options : that.options });
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});
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};
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Busy.prototype.preload = function() {
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var busyImg = this.buildImg();
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busyImg.css("visibility", "hidden");
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busyImg.load(function() {
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$(this).remove();
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});
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$("body").append(busyImg);
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};
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// Creates image node, wraps it in $ object and returns.
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Busy.prototype.buildImg = function() {
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var html = "<img src='" + this.options.img + "' alt='" + this.options.alt + "' title='" + this.options.title + "'";
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if (this.options.width)
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html += " width='" + this.options.width + "'";
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if (this.options.height)
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html += " height='" + this.options.height + "'";
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html += " />";
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return $(html);
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};
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Busy.prototype.positionImg = function(target, busyImg, position) {
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var targetPosition = target.offset();
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var targetWidth = target.outerWidth();
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var targetHeight = target.outerHeight();
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var busyWidth = busyImg.outerWidth();
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var busyHeight = busyImg.outerHeight();
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if (position == "left") {
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var busyLeft = targetPosition.left - busyWidth - this.options.offset;
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}
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else if (position == "right") {
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var busyLeft = targetPosition.left + targetWidth + this.options.offset;
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}
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else {
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var busyLeft = targetPosition.left + (targetWidth - busyWidth) / 2.0;
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}
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var busyTop = targetPosition.top + (targetHeight - busyHeight) / 2.0;
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busyImg.css("position", "absolute");
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busyImg.css("left", busyLeft + "px");
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busyImg.css("top", busyTop + "px");
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};
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Busy.defaults = {
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img : 'busy.gif',
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alt : 'Please wait...',
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title : 'Please wait...',
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hide : true,
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position : 'center',
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zIndex : 1001,
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width : null,
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height : null,
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offset : 10
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};
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$.fn.busy = function(options, defaults) {
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if ($.inArray(options, ["clear", "hide", "remove"]) != -1) {
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// Hide busy image(s)
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new Busy(options).hide($(this));
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}
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else if (options == "defaults") {
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// Overwrite defaults
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$.extend(Busy.defaults, defaults || {});
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}
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else if (options == "preload") {
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// Preload busy image
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new Busy(options).preload();
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}
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else if (options == "reposition") {
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// Update positions of all existing busy images
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Busy.repositionAll();
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}
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else {
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// Show busy image(s)
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new Busy(options).show($(this));
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return $(this);
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}
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};
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})(jQuery);
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