root / astakos / im / static / im / grnetstyles / js / jquery.infieldlabel.js @ 13858d75
History | View | Annotate | Download (3.8 kB)
1 |
/*
|
---|---|
2 |
* In-Field Label jQuery Plugin
|
3 |
* http://fuelyourcoding.com/scripts/infield.html
|
4 |
*
|
5 |
* Copyright (c) 2009 Doug Neiner
|
6 |
* Dual licensed under the MIT and GPL licenses.
|
7 |
* Uses the same license as jQuery, see:
|
8 |
* http://docs.jquery.com/License
|
9 |
*
|
10 |
* @version 0.1
|
11 |
*/
|
12 |
(function($){ |
13 |
|
14 |
$.InFieldLabels = function(label,field, options){ |
15 |
// To avoid scope issues, use 'base' instead of 'this'
|
16 |
// to reference this class from internal events and functions.
|
17 |
var base = this; |
18 |
|
19 |
// Access to jQuery and DOM versions of each element
|
20 |
base.$label = $(label); |
21 |
base.label = label; |
22 |
|
23 |
base.$field = $(field); |
24 |
base.field = field; |
25 |
|
26 |
base.$label.data("InFieldLabels", base); |
27 |
base.showing = true;
|
28 |
|
29 |
base.init = function(){ |
30 |
// Merge supplied options with default options
|
31 |
base.options = $.extend({},$.InFieldLabels.defaultOptions, options); |
32 |
|
33 |
// Check if the field is already filled in
|
34 |
if(base.$field.val() != ""){ |
35 |
base.$label.hide();
|
36 |
base.showing = false;
|
37 |
}; |
38 |
base.$field.focus(function(){ |
39 |
base.fadeOnFocus(); |
40 |
}).blur(function(){
|
41 |
base.checkForEmpty(true);
|
42 |
}).bind('keydown.infieldlabel',function(e){ |
43 |
// Use of a namespace (.infieldlabel) allows us to
|
44 |
// unbind just this method later
|
45 |
base.hideOnChange(e); |
46 |
}).change(function(e){
|
47 |
base.checkForEmpty(); |
48 |
}).bind('onPropertyChange', function(){ |
49 |
base.checkForEmpty(); |
50 |
}); |
51 |
}; |
52 |
|
53 |
// If the label is currently showing
|
54 |
// then fade it down to the amount
|
55 |
// specified in the settings
|
56 |
base.fadeOnFocus = function(){ |
57 |
if(base.showing){
|
58 |
base.setOpacity(base.options.fadeOpacity); |
59 |
}; |
60 |
}; |
61 |
|
62 |
base.setOpacity = function(opacity){ |
63 |
base.$label.stop().animate({ opacity: opacity }, base.options.fadeDuration); |
64 |
base.showing = (opacity > 0.0);
|
65 |
}; |
66 |
|
67 |
// Checks for empty as a fail safe
|
68 |
// set blur to true when passing from
|
69 |
// the blur event
|
70 |
base.checkForEmpty = function(blur){ |
71 |
if(base.$field.val() == ""){ |
72 |
base.prepForShow(); |
73 |
base.setOpacity( blur ? 1.0 : base.options.fadeOpacity );
|
74 |
} else {
|
75 |
base.setOpacity(0.0);
|
76 |
}; |
77 |
}; |
78 |
|
79 |
base.prepForShow = function(e){ |
80 |
if(!base.showing) {
|
81 |
// Prepare for a animate in...
|
82 |
base.$label.css({opacity: 0.0}).show(); |
83 |
|
84 |
// Reattach the keydown event
|
85 |
base.$field.bind('keydown.infieldlabel',function(e){ |
86 |
base.hideOnChange(e); |
87 |
}); |
88 |
}; |
89 |
}; |
90 |
|
91 |
base.hideOnChange = function(e){ |
92 |
if(
|
93 |
(e.keyCode == 16) || // Skip Shift |
94 |
(e.keyCode == 9) // Skip Tab |
95 |
) return;
|
96 |
|
97 |
if(base.showing){
|
98 |
base.$label.hide();
|
99 |
base.showing = false;
|
100 |
}; |
101 |
|
102 |
// Remove keydown event to save on CPU processing
|
103 |
base.$field.unbind('keydown.infieldlabel'); |
104 |
}; |
105 |
|
106 |
// Run the initialization method
|
107 |
base.init(); |
108 |
}; |
109 |
|
110 |
$.InFieldLabels.defaultOptions = {
|
111 |
fadeOpacity: 0.5, // Once a field has focus, how transparent should the label be |
112 |
fadeDuration: 300 // How long should it take to animate from 1.0 opacity to the fadeOpacity |
113 |
}; |
114 |
|
115 |
|
116 |
$.fn.inFieldLabels = function(options){ |
117 |
return this.each(function(){ |
118 |
// Find input or textarea based on for= attribute
|
119 |
// The for attribute on the label must contain the ID
|
120 |
// of the input or textarea element
|
121 |
var for_attr = $(this).attr('for'); |
122 |
if( !for_attr ) return; // Nothing to attach, since the for field wasn't used |
123 |
|
124 |
|
125 |
// Find the referenced input or textarea element
|
126 |
var $field = $( |
127 |
"input#" + for_attr + "[type='text']," + |
128 |
"input#" + for_attr + "[type='password']," + |
129 |
"textarea#" + for_attr
|
130 |
); |
131 |
|
132 |
if( $field.length == 0) return; // Again, nothing to attach |
133 |
|
134 |
// Only create object for input[text], input[password], or textarea
|
135 |
(new $.InFieldLabels(this, $field[0], options)); |
136 |
}); |
137 |
}; |
138 |
|
139 |
})(jQuery); |