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1 (function($){
2 /* hoverIntent by Brian Cherne */
3 $.fn.hoverIntent = function(f,g) {
4 // default configuration options
5 var cfg = {
6 sensitivity: 7,
7 interval: 100,
8 timeout: 0
9 };
10 // override configuration options with user supplied object
11 cfg = $.extend(cfg, g ? { over: f, out: g } : f );
12
13 // instantiate variables
14 // cX, cY = current X and Y position of mouse, updated by mousemove event
15 // pX, pY = previous X and Y position of mouse, set by mouseover and polling interval
16 var cX, cY, pX, pY;
17
18 // A private function for getting mouse position
19 var track = function(ev) {
20 cX = ev.pageX;
21 cY = ev.pageY;
22 };
23
24 // A private function for comparing current and previous mouse position
25 var compare = function(ev,ob) {
26 ob.hoverIntent_t = clearTimeout(ob.hoverIntent_t);
27 // compare mouse positions to see if they've crossed the threshold
28 if ( ( Math.abs(pX-cX) + Math.abs(pY-cY) ) < cfg.sensitivity ) {
29 $(ob).unbind("mousemove",track);
30 // set hoverIntent state to true (so mouseOut can be called)
31 ob.hoverIntent_s = 1;
32 return cfg.over.apply(ob,[ev]);
33 } else {
34 // set previous coordinates for next time
35 pX = cX; pY = cY;
36 // use self-calling timeout, guarantees intervals are spaced out properly (avoids JavaScript timer bugs)
37 ob.hoverIntent_t = setTimeout( function(){compare(ev, ob);} , cfg.interval );
38 }
39 };
40
41 // A private function for delaying the mouseOut function
42 var delay = function(ev,ob) {
43 ob.hoverIntent_t = clearTimeout(ob.hoverIntent_t);
44 ob.hoverIntent_s = 0;
45 return cfg.out.apply(ob,[ev]);
46 };
47
48 // A private function for handling mouse 'hovering'
49 var handleHover = function(e) {
50 // next three lines copied from jQuery.hover, ignore children onMouseOver/onMouseOut
51 var p = (e.type == "mouseover" ? e.fromElement : e.toElement) || e.relatedTarget;
52 while ( p && p != this ) { try { p = p.parentNode; } catch(e) { p = this; } }
53 if ( p == this ) { return false; }
54
55 // copy objects to be passed into t (required for event object to be passed in IE)
56 var ev = jQuery.extend({},e);
57 var ob = this;
58
59 // cancel hoverIntent timer if it exists
60 if (ob.hoverIntent_t) { ob.hoverIntent_t = clearTimeout(ob.hoverIntent_t); }
61
62 // else e.type == "onmouseover"
63 if (e.type == "mouseover") {
64 // set "previous" X and Y position based on initial entry point
65 pX = ev.pageX; pY = ev.pageY;
66 // update "current" X and Y position based on mousemove
67 $(ob).bind("mousemove",track);
68 // start polling interval (self-calling timeout) to compare mouse coordinates over time
69 if (ob.hoverIntent_s != 1) { ob.hoverIntent_t = setTimeout( function(){compare(ev,ob);} , cfg.interval );}
70
71 // else e.type == "onmouseout"
72 } else {
73 // unbind expensive mousemove event
74 $(ob).unbind("mousemove",track);
75 // if hoverIntent state is true, then call the mouseOut function after the specified delay
76 if (ob.hoverIntent_s == 1) { ob.hoverIntent_t = setTimeout( function(){delay(ev,ob);} , cfg.timeout );}
77 }
78 };
79
80 // bind the function to the two event listeners
81 return this.mouseover(handleHover).mouseout(handleHover);
82 };
83
84 })(jQuery);
2 /* hoverIntent by Brian Cherne */
3 $.fn.hoverIntent = function(f,g) {
4 // default configuration options
5 var cfg = {
6 sensitivity: 7,
7 interval: 100,
8 timeout: 0
9 };
10 // override configuration options with user supplied object
11 cfg = $.extend(cfg, g ? { over: f, out: g } : f );
12
13 // instantiate variables
14 // cX, cY = current X and Y position of mouse, updated by mousemove event
15 // pX, pY = previous X and Y position of mouse, set by mouseover and polling interval
16 var cX, cY, pX, pY;
17
18 // A private function for getting mouse position
19 var track = function(ev) {
20 cX = ev.pageX;
21 cY = ev.pageY;
22 };
23
24 // A private function for comparing current and previous mouse position
25 var compare = function(ev,ob) {
26 ob.hoverIntent_t = clearTimeout(ob.hoverIntent_t);
27 // compare mouse positions to see if they've crossed the threshold
28 if ( ( Math.abs(pX-cX) + Math.abs(pY-cY) ) < cfg.sensitivity ) {
29 $(ob).unbind("mousemove",track);
30 // set hoverIntent state to true (so mouseOut can be called)
31 ob.hoverIntent_s = 1;
32 return cfg.over.apply(ob,[ev]);
33 } else {
34 // set previous coordinates for next time
35 pX = cX; pY = cY;
36 // use self-calling timeout, guarantees intervals are spaced out properly (avoids JavaScript timer bugs)
37 ob.hoverIntent_t = setTimeout( function(){compare(ev, ob);} , cfg.interval );
38 }
39 };
40
41 // A private function for delaying the mouseOut function
42 var delay = function(ev,ob) {
43 ob.hoverIntent_t = clearTimeout(ob.hoverIntent_t);
44 ob.hoverIntent_s = 0;
45 return cfg.out.apply(ob,[ev]);
46 };
47
48 // A private function for handling mouse 'hovering'
49 var handleHover = function(e) {
50 // next three lines copied from jQuery.hover, ignore children onMouseOver/onMouseOut
51 var p = (e.type == "mouseover" ? e.fromElement : e.toElement) || e.relatedTarget;
52 while ( p && p != this ) { try { p = p.parentNode; } catch(e) { p = this; } }
53 if ( p == this ) { return false; }
54
55 // copy objects to be passed into t (required for event object to be passed in IE)
56 var ev = jQuery.extend({},e);
57 var ob = this;
58
59 // cancel hoverIntent timer if it exists
60 if (ob.hoverIntent_t) { ob.hoverIntent_t = clearTimeout(ob.hoverIntent_t); }
61
62 // else e.type == "onmouseover"
63 if (e.type == "mouseover") {
64 // set "previous" X and Y position based on initial entry point
65 pX = ev.pageX; pY = ev.pageY;
66 // update "current" X and Y position based on mousemove
67 $(ob).bind("mousemove",track);
68 // start polling interval (self-calling timeout) to compare mouse coordinates over time
69 if (ob.hoverIntent_s != 1) { ob.hoverIntent_t = setTimeout( function(){compare(ev,ob);} , cfg.interval );}
70
71 // else e.type == "onmouseout"
72 } else {
73 // unbind expensive mousemove event
74 $(ob).unbind("mousemove",track);
75 // if hoverIntent state is true, then call the mouseOut function after the specified delay
76 if (ob.hoverIntent_s == 1) { ob.hoverIntent_t = setTimeout( function(){delay(ev,ob);} , cfg.timeout );}
77 }
78 };
79
80 // bind the function to the two event listeners
81 return this.mouseover(handleHover).mouseout(handleHover);
82 };
83
84 })(jQuery);
