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/**
* @license In-Field Label jQuery Plugin
* http://fuelyourcoding.com/scripts/infield.html
*
* Copyright (c) 2009-2010 Doug Neiner
* Dual licensed under the MIT and GPL licenses.
* Uses the same license as jQuery, see:
* http://docs.jquery.com/License
*
* @version 0.1.6
*/
(function ($) {
$.InFieldLabels = function (label, field, options) {
// To avoid scope issues, use 'base' instead of 'this'
// to reference this class from internal events and functions.
var base = this;
// Access to jQuery and DOM versions of each element
base.$label = $(label);
base.label = label;
base.$field = $(field);
base.field = field;
base.$label.data("InFieldLabels", base);
base.showing = true;
base.init = function () {
// Merge supplied options with default options
base.options = $.extend({}, $.InFieldLabels.defaultOptions, options);
// Check if the field is already filled in
// add a short delay to handle autocomplete
setTimeout(function() {
if (base.$field.val() !== "") {
base.$label.hide();
base.showing = false;
}
}, 200);
base.$field.focus(function () {
base.fadeOnFocus();
}).blur(function () {
base.checkForEmpty(true);
}).bind('keydown.infieldlabel', function (e) {
// Use of a namespace (.infieldlabel) allows us to
// unbind just this method later
base.hideOnChange(e);
}).bind('paste', function (e) {
// Since you can not paste an empty string we can assume
// that the fieldis not empty and the label can be cleared.
base.setOpacity(0.0);
}).change(function (e) {
base.checkForEmpty();
}).bind('onPropertyChange', function () {
base.checkForEmpty();
}).bind('keyup.infieldlabel', function () {
base.checkForEmpty()
});
setInterval(function(){
if(base.$field.val() != ""){
base.$label.hide();
base.showing = false;
};
},100);
};
// If the label is currently showing
// then fade it down to the amount
// specified in the settings
base.fadeOnFocus = function () {
if (base.showing) {
base.setOpacity(base.options.fadeOpacity);
}
};
base.setOpacity = function (opacity) {
base.$label.stop().animate({ opacity: opacity }, base.options.fadeDuration);
base.showing = (opacity > 0.0);
};
// Checks for empty as a fail safe
// set blur to true when passing from
// the blur event
base.checkForEmpty = function (blur) {
if (base.$field.val() === "") {
base.prepForShow();
base.setOpacity(blur ? 1.0 : base.options.fadeOpacity);
} else {
base.setOpacity(0.0);
}
};
base.prepForShow = function (e) {
if (!base.showing) {
// Prepare for a animate in...
base.$label.css({opacity: 0.0}).show();
// Reattach the keydown event
base.$field.bind('keydown.infieldlabel', function (e) {
base.hideOnChange(e);
});
}
};
base.hideOnChange = function (e) {
if (
(e.keyCode === 16) || // Skip Shift
(e.keyCode === 9) // Skip Tab
) {
return;
}
if (base.showing) {
base.$label.hide();
base.showing = false;
}
// Remove keydown event to save on CPU processing
base.$field.unbind('keydown.infieldlabel');
};
// Run the initialization method
base.init();
};
$.InFieldLabels.defaultOptions = {
fadeOpacity: 0.5, // Once a field has focus, how transparent should the label be
fadeDuration: 300 // How long should it take to animate from 1.0 opacity to the fadeOpacity
};
$.fn.inFieldLabels = function (options) {
return this.each(function () {
// Find input or textarea based on for= attribute
// The for attribute on the label must contain the ID
// of the input or textarea element
var for_attr = $(this).attr('for'), $field;
if (!for_attr) {
return; // Nothing to attach, since the for field wasn't used
}
// Find the referenced input or textarea element
$field = $(
"input#" + for_attr + "[type='text']," +
"input#" + for_attr + "[type='search']," +
"input#" + for_attr + "[type='tel']," +
"input#" + for_attr + "[type='url']," +
"input#" + for_attr + "[type='email']," +
"input#" + for_attr + "[type='password']," +
"textarea#" + for_attr
);
if ($field.length === 0) {
return; // Again, nothing to attach
}
// Only create object for input[text], input[password], or textarea
(new $.InFieldLabels(this, $field[0], options));
});
};
}(jQuery));
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