|
1
|
/*
|
|
2
|
* imgPreview jQuery plugin
|
|
3
|
* Copyright (c) 2009 James Padolsey
|
|
4
|
* j@qd9.co.uk | http://james.padolsey.com
|
|
5
|
* Dual licensed under MIT and GPL.
|
|
6
|
* Updated: 09/02/09
|
|
7
|
* @author James Padolsey
|
|
8
|
* @version 0.22
|
|
9
|
*/
|
|
10
|
(function($){
|
|
11
|
|
|
12
|
$.expr[':'].linkingToImage = function(elem, index, match){
|
|
13
|
// This will return true if the specified attribute contains a valid link to an image:
|
|
14
|
return !! ($(elem).attr(match[3]) && $(elem).attr(match[3]).match(/\.(gif|jpe?g|png|bmp)$/i));
|
|
15
|
};
|
|
16
|
|
|
17
|
$.fn.imgPreview = function(userDefinedSettings){
|
|
18
|
|
|
19
|
var s = $.extend({
|
|
20
|
|
|
21
|
/* DEFAULTS */
|
|
22
|
|
|
23
|
// CSS to be applied to image:
|
|
24
|
imgCSS: {},
|
|
25
|
// Distance between cursor and preview:
|
|
26
|
distanceFromCursor: {top:10, left:10},
|
|
27
|
// Boolean, whether or not to preload images:
|
|
28
|
preloadImages: true,
|
|
29
|
// Callback: run when link is hovered: container is shown:
|
|
30
|
onShow: function(){},
|
|
31
|
// Callback: container is hidden:
|
|
32
|
onHide: function(){},
|
|
33
|
// Callback: Run when image within container has loaded:
|
|
34
|
onLoad: function(){},
|
|
35
|
// ID to give to container (for CSS styling):
|
|
36
|
containerID: 'imgPreviewContainer',
|
|
37
|
// Class to be given to container while image is loading:
|
|
38
|
containerLoadingClass: 'loading',
|
|
39
|
// Prefix (if using thumbnails), e.g. 'thumb_'
|
|
40
|
thumbPrefix: '',
|
|
41
|
// Where to retrieve the image from:
|
|
42
|
srcAttr: 'href'
|
|
43
|
|
|
44
|
}, userDefinedSettings),
|
|
45
|
|
|
46
|
$container = $('<div/>').attr('id', s.containerID)
|
|
47
|
.append('<img/>').hide()
|
|
48
|
.css('position','absolute')
|
|
49
|
.appendTo('body'),
|
|
50
|
|
|
51
|
$img = $('img', $container).css(s.imgCSS),
|
|
52
|
|
|
53
|
// Get all valid elements (linking to images / ATTR with image link):
|
|
54
|
$collection = this.filter(':linkingToImage(' + s.srcAttr + ')');
|
|
55
|
|
|
56
|
// Re-usable means to add prefix (from setting):
|
|
57
|
function addPrefix(src) {
|
|
58
|
return src.replace(/(\/?)([^\/]+)$/,'$1' + s.thumbPrefix + '$2');
|
|
59
|
}
|
|
60
|
|
|
61
|
if (s.preloadImages) {
|
|
62
|
(function(i){
|
|
63
|
var tempIMG = new Image(),
|
|
64
|
callee = arguments.callee;
|
|
65
|
tempIMG.src = addPrefix($($collection[i]).attr(s.srcAttr));
|
|
66
|
tempIMG.onload = function(){
|
|
67
|
$collection[i + 1] && callee(i + 1);
|
|
68
|
};
|
|
69
|
})(0);
|
|
70
|
}
|
|
71
|
|
|
72
|
$collection
|
|
73
|
.mousemove(function(e){
|
|
74
|
|
|
75
|
$container.css({
|
|
76
|
top: e.pageY + s.distanceFromCursor.top + 'px',
|
|
77
|
left: e.pageX + s.distanceFromCursor.left + 'px'
|
|
78
|
});
|
|
79
|
|
|
80
|
})
|
|
81
|
.hover(function(){
|
|
82
|
|
|
83
|
var link = this;
|
|
84
|
$container
|
|
85
|
.addClass(s.containerLoadingClass)
|
|
86
|
.show();
|
|
87
|
$img
|
|
88
|
.load(function(){
|
|
89
|
$container.removeClass(s.containerLoadingClass);
|
|
90
|
$img.show();
|
|
91
|
s.onLoad.call($img[0], link);
|
|
92
|
})
|
|
93
|
.attr( 'src' , addPrefix($(link).attr(s.srcAttr)) );
|
|
94
|
s.onShow.call($container[0], link);
|
|
95
|
|
|
96
|
}, function(){
|
|
97
|
|
|
98
|
$container.hide();
|
|
99
|
$img.unbind('load').attr('src','').hide();
|
|
100
|
s.onHide.call($container[0], this);
|
|
101
|
|
|
102
|
});
|
|
103
|
|
|
104
|
// Return full selection, not $collection!
|
|
105
|
return this;
|
|
106
|
|
|
107
|
};
|
|
108
|
|
|
109
|
})(jQuery);
|