+++ /dev/null
-/*!
- * jquery.event.linger - v 1.0.0
- * Copyright (c) 2010 Three Dub Media - http://threedubmedia.com
- * Open Source MIT License - http://threedubmedia.com/code/license
- */
-// Created: 2008-06-02
-// Updated: 2010-09-13
-// REQUIRES: jquery 1.4.2+
-
-;(function($){ // secure $ jQuery alias
-
-// add the jquery instance method
-$.fn.linger = function( str, arg, opts ){
- // figure out the event type
- var type = typeof str == "string" ? str : "",
- // figure out the event handler...
- fn = $.isFunction( str ) ? str : $.isFunction( arg ) ? arg : null;
- // fix the event type
- if ( type.indexOf("linger") !== 0 )
- type = "linger"+ type;
- // were options passed
- opts = ( str == fn ? arg : opts ) || {};
- // trigger or bind event handler
- return fn ? this.bind( type, opts, fn ) : this.trigger( type );
-};
-
-
-// local refs (increase compression)
-var $event = $.event,
-$special = $event.special,
-// special event configuration
-linger = $special.linger = {
-
- // default settings
- defaults: {
- speed: 100, // speed limit (pixels per second)
- delay: 100, // milliseconds per speed check
- persist: 400 // milliseconds after mouseleave
- },
-
- // the key name for stored data
- datakey: "lingerdata",
-
- // count bound related events
- add: function( obj ){
- // read the interaction data
- var data = $.data( this, linger.datakey ),
- // read any passed options
- opts = obj.data || {};
- // count another realted event
- data.related += 1;
- // extend data options bound with this event
- // don't iterate "opts" in case it is a node
- $.each( linger.defaults, function( key, def ){
- if ( opts[ key ] !== undefined )
- data[ key ] = opts[ key ];
- });
- },
-
- // forget unbound related events
- remove: function(){
- $.data( this, linger.datakey ).related -= 1;
- },
-
- // configure interaction
- setup: function(){
- // check for related events
- if ( $.data( this, linger.datakey ) )
- return;
- // initialize the drag data with copied defaults
- var data = $.extend({ related:0 }, linger.defaults );
- // store the interaction data
- $.data( this, linger.datakey, data );
- // bind the mouse events with data
- $event.add( this, "mouseenter mouseleave", linger.handler, data );
- },
-
- // destroy configured interaction
- teardown: function(){
- // check for related events
- if ( $.data( this, linger.datakey ).related )
- return;
- // remove the stored data
- $.removeData( this, linger.datakey );
- // remove the mouse events
- $event.remove( this, "mouseenter mousemove mouseleave", linger.handler );
- },
-
- // handle mouse events
- handler: function( event ){
- var data = event.data || {};
- // initialize props for new interaction
- if ( event.type == "mouseenter" && !data.lingered ){
- // mouse distance squared
- data.dist2 = 0;
- // ( speed * time ) squared
- data.limit = Math.pow( data.speed * ( data.delay/1e3 ), 2 );
- // the interacted element
- data.elem = this;
- // handle the start event (handler may return false to cancel)
- if ( linger.hijack( event, "lingerstart", this ) ){
- // store the event, to compare later
- data.event = event;
- // begin tracking the mouse movement
- $event.add( this, "mousemove", linger.handler, data );
- // start comparing mouse speed at fixed intervals
- data.timer = setTimeout(function(){
- // check the current speed against the limit
- if ( data.dist2 <= data.limit )
- // handle the linger event (handler may return false to cancel)
- data.lingered = linger.hijack( data.event, "linger", data.elem );
- // stop tracking the mouse
- if ( data.lingered )
- $event.remove( data.elem, "mousemove", linger.handler );
- // recurse
- else
- data.timer = setTimeout( arguments.callee, data.delay );
- // reset distance for next comparison
- data.dist2 = 0;
- }, data.delay );
- }
- }
- // stop if not properly initialized
- if ( !data.event )
- return;
- // handle other events
- switch ( event.type ){
- // mouse re-entry
- case data.lingered && 'mouseenter':
- // stop the current timer
- clearTimeout( data.timer );
- break;
- // track mouse movement
- case 'mousemove':
- // distance² = x² + y²
- data.dist2 += Math.pow( event.pageX - data.event.pageX, 2 )
- + Math.pow( event.pageY - data.event.pageY, 2 );
- // store current event
- data.event = event;
- break;
- // handle leaving after lingering
- case data.lingered && 'mouseleave':
- // optionally delay the end event
- data.timer = setTimeout(function(){
- // handle the end event, flip flag for lingering
- data.lingered = !linger.hijack( event, "lingerend", data.elem );
- // if still lingering, recurse
- if ( data.lingered )
- setTimeout( arguments.callee, data.persist );
- }, data.persist );
- break;
- // handle leaving after no lingering
- case !data.lingered && 'mouseleave':
- // stop the current timer
- clearTimeout( data.timer );
- // stop tracking the mouse movement
- $event.remove( data.elem, "mousemove", linger.handler );
- // clean the data for next interaction
- data.event = null;
- break;
- }
- },
-
- // re-use event object for custom events
- hijack: function( event, type, elem ){
- // remember the original event and type
- var result, orig = {
- event: event.originalEvent,
- type: event.type
- };
- // modify the event type
- event.type = type;
- // remove the original event
- event.originalEvent = null;
- // remove any previous event result
- event.result = null;
- // handle the custom event
- result = $event.handle.call( elem, event );
- // restore the original event & type
- event.type = orig.type;
- event.originalEvent = orig.event;
- // return handled result
- return ( result !== false );
- }
-};
-
-// share the same special event configuration with related events...
-$special.lingerstart = $special.lingerend = linger;
-
-})(jQuery); // confine scope
\ No newline at end of file
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