78 lines
2.2 KiB
JavaScript
78 lines
2.2 KiB
JavaScript
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/**
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* @author trixta and bodrovis
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* @version 1.3
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*/
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(function($){
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var mwheelI = {
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pos: [-260, -260]
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},
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minDif = 3,
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doc = document,
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root = doc.documentElement,
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body = doc.body,
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longDelay, shortDelay
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;
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function unsetPos(){
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if(this === mwheelI.elem){
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mwheelI.pos = [-260, -260];
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mwheelI.elem = false;
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minDif = 3;
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}
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}
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$.event.special.mwheelIntent = {
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setup: function() {
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var jElm = $(this).on('mousewheel', $.event.special.mwheelIntent.handler);
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if( this !== doc && this !== root && this !== body ){
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jElm.on('mouseleave', unsetPos);
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}
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jElm = null;
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return true;
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},
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teardown: function(){
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$(this)
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.off('mousewheel', $.event.special.mwheelIntent.handler)
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.off('mouseleave', unsetPos)
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;
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return true;
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},
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handler: function(e, d) {
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var pos = [e.clientX, e.clientY];
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if( this === mwheelI.elem || Math.abs(mwheelI.pos[0] - pos[0]) > minDif ||
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Math.abs(mwheelI.pos[1] - pos[1]) > minDif ) {
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mwheelI.elem = this;
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mwheelI.pos = pos;
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minDif = 250;
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clearTimeout(shortDelay);
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shortDelay = setTimeout(function(){
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minDif = 10;
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}, 200);
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clearTimeout(longDelay);
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longDelay = setTimeout(function(){
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minDif = 3;
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}, 1500);
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e = $.extend({}, e, {type: 'mwheelIntent'});
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return $.event.dispatch.apply(this, arguments);
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}
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}
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};
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$.fn.extend({
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mwheelIntent: function(fn) {
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return fn ? this.on("mwheelIntent", fn) : this.trigger("mwheelIntent");
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},
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unmwheelIntent: function(fn) {
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return this.off("mwheelIntent", fn);
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}
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});
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$(function(){
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body = doc.body;
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//assume that document is always scrollable, doesn't hurt if not
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$(doc).on('mwheelIntent.mwheelIntentDefault', $.noop);
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});
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})(jQuery);
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