mirror of
https://github.com/silverstripe/silverstripe-framework
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git-svn-id: svn://svn.silverstripe.com/silverstripe/open/modules/sapphire/branches/2.4@93546 467b73ca-7a2a-4603-9d3b-597d59a354a9
176 lines
4.7 KiB
JavaScript
176 lines
4.7 KiB
JavaScript
/*
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* jQuery UI Magnifier @VERSION
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*
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* Copyright (c) 2008 jQuery
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* Dual licensed under the MIT (MIT-LICENSE.txt)
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* and GPL (GPL-LICENSE.txt) licenses.
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*
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* http://docs.jquery.com/UI/Magnifier
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*
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* Depends:
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* ui.core.js
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*/
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(function($) {
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var counter = 0;
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$.widget("ui.magnifier", {
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_init: function() {
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var self = this,
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o = this.options;
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this.element
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.addClass("ui-magnifier")
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.bind('click.magnifier', function(e) {
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(!self.disabled && o.click && o.click.apply(this, [e, {
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options: self.options,
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current: self.current[0],
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currentOffset: self.current[1]
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}]));
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});
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// the element must have relative or absolute positioning
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if (!(/^(r|a)/).test(this.element.css("position"))) {
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this.element.css("position", "relative");
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}
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this.items = [];
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this.element.find(o.items).each(function() {
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var $this = $(this);
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// TODO: use a hash so references to this data is readable
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self.items.push([
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this,
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$this.offset(),
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[$this.width(),$this.height()],
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(o.overlap ? $this.position() : null)
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]);
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(o.opacity && $this.css('opacity', o.opacity.min));
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});
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// absolutize
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(o.overlap && $.each(this.items, function() {
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$(this[0]).css({
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position: "absolute",
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top: this[3].top,
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left: this[3].left
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});
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}));
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this.identifier = ++counter;
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$(document).bind("mousemove.magnifier"+this.identifier, function(e) {
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(self.disabled || self._magnify.apply(self, [e]));
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});
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this.pp = this.element.offset();
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},
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destroy: function() {
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this.reset();
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this.element
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.removeClass("ui-magnifier ui-magnifier-disabled")
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.unbind(".magnifier");
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$(document).unbind("mousemove.magnifier"+this.identifier);
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},
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disable: function() {
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this.reset();
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$.widget.prototype.disable.apply(this, arguments);
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},
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reset: function(e) {
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var o = this.options;
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$.each(this.items, function() {
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var item = this;
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$(item[0]).css({
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width: item[2][0],
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height: item[2][1],
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top: (item[3] ? item[3].top : 0),
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left: (item[3] ? item[3].left : 0)
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});
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(o.opacity && $(item[0]).css('opacity', o.opacity.min));
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(o.zIndex && $(item[0]).css("z-index", ""));
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});
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},
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_magnify: function(e) {
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var p = [e.pageX,e.pageY], o = this.options, c, distance = 1;
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this.current = this.items[0];
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// Compute the parent's distance
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// we don't need to fire anything if we are not near the parent
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var overlap = ((p[0] > this.pp.left-o.distance) &&
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(p[0] < this.pp.left + this.element[0].offsetWidth + o.distance) &&
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(p[1] > this.pp.top-o.distance) &&
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(p[1] < this.pp.top + this.element[0].offsetHeight + o.distance));
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if (!overlap) { return false; }
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for (var i=0; i<this.items.length; i++) {
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c = this.items[i];
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var olddistance = distance;
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if (!o.axis) {
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distance = Math.sqrt(
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Math.pow(p[0] - ((c[3] ? this.pp.left : c[1].left) + parseInt(c[0].style.left,10)) - (c[0].offsetWidth/2), 2)
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+ Math.pow(p[1] - ((c[3] ? this.pp.top : c[1].top ) + parseInt(c[0].style.top,10)) - (c[0].offsetHeight/2), 2)
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);
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} else {
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if(o.axis == "y") {
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distance = Math.abs(p[1] - ((c[3] ? this.pp.top : c[1].top ) + parseInt(c[0].style.top,10)) - (c[0].offsetHeight/2));
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} else {
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distance = Math.abs(p[0] - ((c[3] ? this.pp.left : c[1].left) + parseInt(c[0].style.left,10)) - (c[0].offsetWidth/2));
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}
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}
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if (distance < o.distance) {
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this.current = distance < olddistance ? c : this.current;
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if (!o.axis || o.axis != "y") {
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$(c[0]).css({
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width: c[2][0]+ (c[2][0] * (o.magnification-1)) - (((distance/o.distance)*c[2][0]) * (o.magnification-1)),
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left: (c[3] ? (c[3].left + o.verticalLine * ((c[2][1] * (o.magnification-1)) - (((distance/o.distance)*c[2][1]) * (o.magnification-1)))) : 0)
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});
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}
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if (!o.axis || o.axis != "x") {
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$(c[0]).css({
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height: c[2][1]+ (c[2][1] * (o.magnification-1)) - (((distance/o.distance)*c[2][1]) * (o.magnification-1)),
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top: (c[3] ? c[3].top : 0) + (o.baseline-0.5) * ((c[2][0] * (o.magnification-1)) - (((distance/o.distance)*c[2][0]) * (o.magnification-1)))
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});
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}
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if (o.opacity) {
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$(c[0]).css('opacity', o.opacity.max-(distance/o.distance) < o.opacity.min ? o.opacity.min : o.opacity.max-(distance/o.distance));
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}
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} else {
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$(c[0]).css({
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width: c[2][0],
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height: c[2][1],
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top: (c[3] ? c[3].top : 0),
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left: (c[3] ? c[3].left : 0)
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});
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(o.opacity && $(c[0]).css('opacity', o.opacity.min));
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}
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(o.zIndex && $(c[0]).css("z-index", ""));
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}
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(o.zIndex && $(this.current[0]).css("z-index", o.zIndex));
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}
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});
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$.extend($.ui.magnifier, {
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defaults: {
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distance: 150,
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magnification: 2,
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baseline: 0,
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verticalLine: -0.5,
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items: "> *"
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}
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});
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})(jQuery);
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