/
jquery.isotope.js
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jquery.isotope.js
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/**
* Isotope v1.1.110502
* An exquisite jQuery plugin for magical layouts
* http://isotope.metafizzy.co
*
* Commercial use requires one-time license fee
* http://metafizzy.co/#licenses
*
* Copyright 2011 David DeSandro / Metafizzy
*/
(function( window, $, undefined ){
// ========================= getStyleProperty by kangax ===============================
// http://perfectionkills.com/feature-testing-css-properties/
var getStyleProperty = (function(){
var prefixes = ['Moz', 'Webkit', 'Khtml', 'O', 'Ms'];
var _cache = { };
function getStyleProperty(propName, element) {
element = element || document.documentElement;
var style = element.style,
prefixed,
uPropName,
i, l;
// check cache only when no element is given
if (arguments.length === 1 && typeof _cache[propName] === 'string') {
return _cache[propName];
}
// test standard property first
if (typeof style[propName] === 'string') {
return (_cache[propName] = propName);
}
// capitalize
uPropName = propName.charAt(0).toUpperCase() + propName.slice(1);
// test vendor specific properties
for (i=0, l=prefixes.length; i<l; i++) {
prefixed = prefixes[i] + uPropName;
if (typeof style[prefixed] === 'string') {
return (_cache[propName] = prefixed);
}
}
}
return getStyleProperty;
}());
var transformProp = getStyleProperty('transform');
// ========================= miniModernizr ===============================
// <3<3<3 and thanks to Faruk and Paul for doing the heavy lifting
/*!
* Modernizr v1.6ish: miniModernizr for Isotope
* http://www.modernizr.com
*
* Developed by:
* - Faruk Ates http://farukat.es/
* - Paul Irish http://paulirish.com/
*
* Copyright (c) 2009-2010
* Dual-licensed under the BSD or MIT licenses.
* http://www.modernizr.com/license/
*/
/*
* This version whittles down the script just to check support for
* CSS transitions, transforms, and 3D transforms.
*/
var docElement = document.documentElement,
vendorCSSPrefixes = ' -o- -moz- -ms- -webkit- -khtml- '.split(' '),
tests = [
{
name : 'csstransforms',
getResult : function() {
return !!transformProp;
}
},
{
name : 'csstransforms3d',
getResult : function() {
var test = !!getStyleProperty('perspective');
// double check for Chrome's false positive
if ( test ){
var st = document.createElement('style'),
div = document.createElement('div'),
mq = '@media (' + vendorCSSPrefixes.join('transform-3d),(') + 'modernizr)';
st.textContent = mq + '{#modernizr{height:3px}}';
(document.head || document.getElementsByTagName('head')[0]).appendChild(st);
div.id = 'modernizr';
docElement.appendChild(div);
test = div.offsetHeight === 3;
st.parentNode.removeChild(st);
div.parentNode.removeChild(div);
}
return !!test;
}
},
{
name : 'csstransitions',
getResult : function() {
return !!getStyleProperty('transitionProperty');
}
}
],
i, len = tests.length
;
if ( window.Modernizr ) {
// if there's a previous Modernzir, check if there are necessary tests
for ( i=0; i < len; i++ ) {
var test = tests[i];
if ( !Modernizr.hasOwnProperty( test.name ) ) {
// if test hasn't been run, use addTest to run it
Modernizr.addTest( test.name, test.getResult );
}
}
} else {
// or create new mini Modernizr that just has the 3 tests
window.Modernizr = (function(){
var miniModernizr = {
_version : '1.6ish: miniModernizr for Isotope'
},
classes = [],
test, result, className;
// Run through tests
for ( i=0; i < len; i++ ) {
test = tests[i];
result = test.getResult();
miniModernizr[ test.name ] = result;
className = ( result ? '' : 'no-' ) + test.name;
classes.push( className );
}
// Add the new classes to the <html> element.
docElement.className += ' ' + classes.join( ' ' );
return miniModernizr;
})();
}
// ========================= isoTransform ===============================
/**
* provides hooks for .css({ scale: value, translate: [x, y] })
* Progressively enhanced CSS transforms
* Uses hardware accelerated 3D transforms for Safari
* or falls back to 2D transforms.
*/
if ( Modernizr.csstransforms ) {
// i.e. transformFnNotations.scale(0.5) >> 'scale3d( 0.5, 0.5, 1)'
var transformFnNotations = Modernizr.csstransforms3d ?
{ // 3D transform functions
translate : function ( position ) {
return 'translate3d(' + position[0] + 'px, ' + position[1] + 'px, 0) ';
},
scale : function ( scale ) {
return 'scale3d(' + scale + ', ' + scale + ', 1) ';
}
} :
{ // 2D transform functions
translate : function ( position ) {
return 'translate(' + position[0] + 'px, ' + position[1] + 'px) ';
},
scale : function ( scale ) {
return 'scale(' + scale + ') ';
}
}
;
function setIsoTransform ( elem, name, value ) {
var $elem = $(elem),
// unpack current transform data
data = $elem.data('isoTransform') || {},
newData = {},
fnName,
transformObj = {},
transformValue;
// i.e. newData.scale = 0.5
newData[ name ] = value;
// extend new value over current data
$.extend( data, newData );
for ( fnName in data ) {
transformValue = data[ fnName ];
transformObj[ fnName ] = transformFnNotations[ fnName ]( transformValue );
}
// get proper order
// ideally, we could loop through this give an array, but since we only have
// a couple transforms we're keeping track of, we'll do it like so
var translateFn = transformObj.translate || '',
scaleFn = transformObj.scale || '',
// sorting so translate always comes first
valueFns = translateFn + scaleFn;
// set data back in elem
$elem.data( 'isoTransform', data );
// set name to vendor specific property
elem.style[ transformProp ] = valueFns;
}
// ==================== scale ===================
$.cssNumber.scale = true;
$.cssHooks.scale = {
set: function( elem, value ) {
if ( typeof value === 'string' ) {
value = parseFloat( value );
}
setIsoTransform( elem, 'scale', value );
},
get: function( elem, computed ) {
var transform = $.data( elem, 'isoTransform' );
return transform && transform.scale ? transform.scale : 1;
}
};
$.fx.step.scale = function( fx ) {
$.cssHooks.scale.set( fx.elem, fx.now+fx.unit );
};
// ==================== translate ===================
$.cssNumber.translate = true;
$.cssHooks.translate = {
set: function( elem, value ) {
// all this would be for public ease-of-use,
// but we're leaving it out since this add-on is
// only for internal-plugin use
// if ( typeof value === 'string' ) {
// value = value.split(' ');
// }
//
//
// var i, val;
// for ( i = 0; i < 2; i++ ) {
// val = value[i];
// if ( typeof val === 'string' ) {
// val = parseInt( val );
// }
// }
setIsoTransform( elem, 'translate', value );
},
get: function( elem, computed ) {
var transform = $.data( elem, 'isoTransform' );
return transform && transform.translate ? transform.translate : [ 0, 0 ];
}
};
}
/*!
* smartresize: debounced resize event for jQuery
* http://github.com/lrbabe/jquery-smartresize
*
* Copyright (c) 2009 Louis-Remi Babe
* Licensed under the GPL license.
* http://docs.jquery.com/License
*
*/
var $event = $.event,
resizeTimeout;
$event.special.smartresize = {
setup: function() {
$(this).bind( "resize", $event.special.smartresize.handler );
},
teardown: function() {
$(this).unbind( "resize", $event.special.smartresize.handler );
},
handler: function( event, execAsap ) {
// Save the context
var context = this,
args = arguments;
// set correct event type
event.type = "smartresize";
if ( resizeTimeout ) { clearTimeout( resizeTimeout ); }
resizeTimeout = setTimeout(function() {
jQuery.event.handle.apply( context, args );
}, execAsap === "execAsap"? 0 : 100 );
}
};
$.fn.smartresize = function( fn ) {
return fn ? this.bind( "smartresize", fn ) : this.trigger( "smartresize", ["execAsap"] );
};
// ========================= Isotope ===============================
// our "Widget" object constructor
$.Isotope = function( options, element ){
this.element = $( element );
this._create( options );
this._init();
};
// styles of container element we want to keep track of
var isoContainerStyles = [ 'overflow', 'position', 'width', 'height' ];
$.Isotope.settings = {
resizable: true,
layoutMode : 'masonry',
containerClass : 'isotope',
itemClass : 'isotope-item',
hiddenClass : 'isotope-hidden',
hiddenStyle : Modernizr.csstransforms && !$.browser.opera ?
{ opacity : 0, scale : 0.001 } : // browsers support CSS transforms, not Opera
{ opacity : 0 }, // other browsers, including Opera
visibleStyle : Modernizr.csstransforms && !$.browser.opera ?
{ opacity : 1, scale : 1 } : // browsers support CSS transforms, not Opera
{ opacity : 1 }, // other browsers, including Opera
animationEngine : $.browser.opera ? 'jquery' : 'best-available',
animationOptions: {
queue: false,
duration: 800
},
sortBy : 'original-order',
sortAscending : true,
resizesContainer : true,
transformsEnabled : true,
itemPositionDataEnabled: false
};
$.Isotope.prototype = {
_filterFind: function( $elems, selector ) {
return selector ? $elems.filter( selector ).add( $elems.find( selector ) ) : $elems;
},
// sets up widget
_create : function( options ) {
this.options = $.extend( true, {}, $.Isotope.settings, options );
this.styleQueue = [];
this.elemCount = 0;
// need to get atoms
this.$allAtoms = this._filterFind( this.element.children(), this.options.itemSelector );
// get original styles in case we re-apply them in .destroy()
var elemStyle = this.element[0].style;
this.originalStyle = {};
for ( var i=0, len = isoContainerStyles.length; i < len; i++ ) {
var prop = isoContainerStyles[i];
this.originalStyle[ prop ] = elemStyle[ prop ] || null;
}
this.element.css({
overflow : 'hidden',
position : 'relative'
});
var jQueryAnimation = false;
// get applyStyleFnName
switch ( this.options.animationEngine.toLowerCase().replace( /[ _\-]/g, '') ) {
case 'css' :
case 'none' :
this.applyStyleFnName = 'css';
break;
case 'jquery' :
this.applyStyleFnName = 'animate';
jQueryAnimation = true;
break;
default : // best available
this.applyStyleFnName = Modernizr.csstransitions ? 'css' : 'animate';
}
this.usingTransforms = this.options.transformsEnabled && Modernizr.csstransforms && Modernizr.csstransitions && !jQueryAnimation;
this.getPositionStyles = this.usingTransforms ? this._translate : this._positionAbs;
// sorting
var originalOrderSorter = {
'original-order' : function( $elem, instance ) {
return instance.elemCount;
}
};
this.options.getSortData = $.extend( this.options.getSortData, originalOrderSorter );
this._setupAtoms( this.$allAtoms );
// get top left position of where the bricks should be
var $cursor = $( document.createElement('div') );
this.element.prepend( $cursor );
this.posTop = Math.round( $cursor.position().top );
this.posLeft = Math.round( $cursor.position().left );
$cursor.remove();
// add isotope class first time around
var instance = this;
setTimeout( function() {
instance.element.addClass( instance.options.containerClass );
}, 0 );
// bind resize method
if ( this.options.resizable ) {
$(window).bind( 'smartresize.isotope', function() {
instance.element.isotope('resize');
});
}
},
// _init fires when your instance is first created
// (from the constructor above), and when you
// attempt to initialize the widget again (by the bridge)
// after it has already been initialized.
_init : function( callback ) {
this.$filteredAtoms = this._filter( this.$allAtoms );
this._sort();
this.reLayout( callback );
},
option: function( key, value ){
// get/change options AFTER initialization:
// you don't have to support all these cases,
// but here's how:
// signature: $('#foo').bar({ cool:false });
if ( $.isPlainObject( key ) ){
this.options = $.extend(true, this.options, key);
// signature: $('#foo').option('cool'); - getter
} else if ( key && typeof value === "undefined" ){
return this.options[ key ];
// signature: $('#foo').bar('option', 'baz', false);
} else {
this.options[ key ] = value;
}
return this; // make sure to return the instance!
},
// ====================== Adding ======================
_setupAtoms : function( $atoms ) {
// base style for atoms
var atomStyle = { position: 'absolute' };
if ( this.usingTransforms ) {
atomStyle.left = 0;
atomStyle.top = 0;
}
$atoms.css( atomStyle ).addClass( this.options.itemClass );
this.updateSortData( $atoms, true );
},
// ====================== Filtering ======================
_filter : function( $atoms ) {
var $filteredAtoms,
filter = this.options.filter === '' ? '*' : this.options.filter;
if ( !filter ) {
$filteredAtoms = $atoms;
} else {
var hiddenClass = this.options.hiddenClass,
hiddenSelector = '.' + hiddenClass,
$visibleAtoms = $atoms.not( hiddenSelector ),
$hiddenAtoms = $atoms.filter( hiddenSelector ),
$atomsToShow = $hiddenAtoms;
$filteredAtoms = $atoms.filter( filter );
if ( filter !== '*' ) {
$atomsToShow = $hiddenAtoms.filter( filter );
var $atomsToHide = $visibleAtoms.not( filter ).toggleClass( hiddenClass );
$atomsToHide.addClass( hiddenClass );
this.styleQueue.push({ $el: $atomsToHide, style: this.options.hiddenStyle });
}
this.styleQueue.push({ $el: $atomsToShow, style: this.options.visibleStyle });
$atomsToShow.removeClass( hiddenClass );
}
return $filteredAtoms;
},
// ====================== Sorting ======================
updateSortData : function( $atoms, isIncrementingElemCount ) {
var instance = this,
getSortData = this.options.getSortData,
$this, sortData;
$atoms.each(function(){
$this = $(this);
sortData = {};
// get value for sort data based on fn( $elem ) passed in
for ( var key in getSortData ) {
sortData[ key ] = getSortData[ key ]( $this, instance );
}
// apply sort data to $element
$this.data( 'isotope-sort-data', sortData );
if ( isIncrementingElemCount ) {
instance.elemCount ++;
}
});
},
// used on all the filtered atoms
_sort : function() {
var instance = this,
getSorter = function( elem ) {
return $(elem).data('isotope-sort-data')[ instance.options.sortBy ];
},
sortDir = this.options.sortAscending ? 1 : -1,
sortFn = function( alpha, beta ) {
var a = getSorter( alpha ),
b = getSorter( beta );
return ( ( a > b ) ? 1 : ( a < b ) ? -1 : 0 ) * sortDir;
};
this.$filteredAtoms.sort( sortFn );
return this;
},
// ====================== Layout ======================
_translate : function( x, y ) {
return { translate : [ x, y ] };
},
_positionAbs : function( x, y ) {
return { left: x, top: y };
},
_pushPosition : function( $elem, x, y ) {
var position = this.getPositionStyles( x, y );
this.styleQueue.push({ $el: $elem, style: position });
if ( this.options.itemPositionDataEnabled ) {
$elem.data('isotope-item-position', {x: x, y: y} );
}
},
// ====================== General Layout ======================
// used on collection of atoms (should be filtered, and sorted before )
// accepts atoms-to-be-laid-out to start with
layout : function( $elems, callback ) {
var layoutMode = this.options.layoutMode;
// layout logic
this[ '_' + layoutMode + 'Layout' ]( $elems );
// set the size of the container
if ( this.options.resizesContainer ) {
var containerStyle = this[ '_' + layoutMode + 'GetContainerSize' ]();
this.styleQueue.push({ $el: this.element, style: containerStyle });
}
// are we animating the layout arrangement?
// use plugin-ish syntax for css or animate
var styleFn = ( this.applyStyleFnName === 'animate' && !this.isLaidOut ) ?
'css' : this.applyStyleFnName,
animOpts = this.options.animationOptions;
// process styleQueue
$.each( this.styleQueue, function( i, obj ) {
obj.$el[ styleFn ]( obj.style, animOpts );
});
// clear out queue for next time
this.styleQueue = [];
// provide $elems as context for the callback
if ( callback ) {
callback.call( $elems );
}
this.isLaidOut = true;
return this;
},
resize : function() {
return this[ '_' + this.options.layoutMode + 'Resize' ]();
},
reLayout : function( callback ) {
return this[ '_' + this.options.layoutMode + 'Reset' ]()
.layout( this.$filteredAtoms, callback );
},
// ====================== Convenience methods ======================
// adds a jQuery object of items to a isotope container
addItems : function( $content, callback ) {
var $newAtoms = this._filterFind( $content, this.options.itemSelector );
this._setupAtoms( $newAtoms );
// add new atoms to atoms pools
// FIXME : this breaks shuffle order and returns to original order
this.$allAtoms = this.$allAtoms.add( $newAtoms );
if ( callback ) {
callback( $newAtoms );
}
},
// convienence method for adding elements properly to any layout
insert : function( $content, callback ) {
this.element.append( $content );
var instance = this;
this.addItems( $content, function( $newAtoms ) {
var $filteredAtoms = instance._filter( $newAtoms );
instance.$filteredAtoms = instance.$filteredAtoms.add( $filteredAtoms );
});
this._sort().reLayout( callback );
},
// convienence method for working with Infinite Scroll
appended : function( $content, callback ) {
var instance = this;
this.addItems( $content, function( $newAtoms ){
instance.$filteredAtoms = instance.$filteredAtoms.add( $newAtoms );
instance.layout( $newAtoms, callback );
});
},
// removes elements from Isotope widget
remove : function( $content ) {
this.$allAtoms = this.$allAtoms.not( $content );
this.$filteredAtoms = this.$filteredAtoms.not( $content );
$content.remove();
},
_shuffleArray : function ( array ) {
var tmp, current, i = array.length;
if ( i ){
while(--i) {
current = ~~( Math.random() * (i + 1) );
tmp = array[current];
array[current] = array[i];
array[i] = tmp;
}
}
return array;
},
// HACKy should probably remove
shuffle : function( callback ) {
this.options.sortBy = 'shuffle';
this.$allAtoms = this._shuffleArray( this.$allAtoms );
this.$filteredAtoms = this._filter( this.$allAtoms );
return this.reLayout( callback );
},
// destroys widget, returns elements and container back (close) to original style
destroy : function() {
var usingTransforms = this.usingTransforms;
this.$allAtoms
.removeClass( this.options.hiddenClass + ' ' + this.options.itemClass )
.each(function(){
this.style.position = null;
this.style.top = null;
this.style.left = null;
this.style.opacity = null;
if ( usingTransforms ) {
this.style[ transformProp ] = null;
}
});
// re-apply saved container styles
var elemStyle = this.element[0].style;
for ( var i=0, len = isoContainerStyles.length; i < len; i++ ) {
var prop = isoContainerStyles[i];
elemStyle[ prop ] = this.originalStyle[ prop ];
}
this.element
.unbind('.isotope')
.removeClass( this.options.containerClass )
.removeData('isotope');
$(window).unbind('.isotope');
},
// calculates number of rows or columns
// requires columnWidth or rowHeight to be set on namespaced object
// i.e. this.masonry.columnWidth = 200
_getSegments : function( namespace, isRows ) {
var measure = isRows ? 'rowHeight' : 'columnWidth',
size = isRows ? 'height' : 'width',
UCSize = isRows ? 'Height' : 'Width',
segmentsName = isRows ? 'rows' : 'cols',
segments,
segmentSize;
this[ size ] = this.element[ size ]();
// i.e. options.masonry && options.masonry.columnWidth
segmentSize = this.options[ namespace ] && this.options[ namespace ][ measure ] ||
// or use the size of the first item
this.$filteredAtoms[ 'outer' + UCSize ](true) ||
// if there's no items, use size of container
this[ size ];
segments = Math.floor( this[ size ] / segmentSize );
segments = Math.max( segments, 1 );
// i.e. this.masonry.cols = ....
this[ namespace ][ segmentsName ] = segments;
// i.e. this.masonry.columnWidth = ...
this[ namespace ][ measure ] = segmentSize;
return this;
},
// ====================== LAYOUTS ======================
// ====================== Masonry ======================
_masonryPlaceBrick : function( $brick, setCount, setY ) {
// here, `this` refers to a child element or "brick"
// get the minimum Y value from the columns
var minimumY = Math.min.apply( Math, setY ),
setHeight = minimumY + $brick.outerHeight(true),
i = setY.length,
shortCol = i,
setSpan = this.masonry.cols + 1 - i,
x, y ;
// Which column has the minY value, closest to the left
while (i--) {
if ( setY[i] === minimumY ) {
shortCol = i;
}
}
// position the brick
x = this.masonry.columnWidth * shortCol + this.posLeft;
y = minimumY;
this._pushPosition( $brick, x, y );
// apply setHeight to necessary columns
for ( i=0; i < setSpan; i++ ) {
this.masonry.colYs[ shortCol + i ] = setHeight;
}
},
_masonryLayout : function( $elems ) {
var instance = this;
$elems.each(function(){
var $this = $(this),
//how many columns does this brick span
colSpan = Math.ceil( $this.outerWidth(true) / instance.masonry.columnWidth );
colSpan = Math.min( colSpan, instance.masonry.cols );
if ( colSpan === 1 ) {
// if brick spans only one column, just like singleMode
instance._masonryPlaceBrick( $this, instance.masonry.cols, instance.masonry.colYs );
} else {
// brick spans more than one column
// how many different places could this brick fit horizontally
var groupCount = instance.masonry.cols + 1 - colSpan,
groupY = [],
groupColY,
i;
// for each group potential horizontal position
for ( i=0; i < groupCount; i++ ) {
// make an array of colY values for that one group
groupColY = instance.masonry.colYs.slice( i, i+colSpan );
// and get the max value of the array
groupY[i] = Math.max.apply( Math, groupColY );
}
instance._masonryPlaceBrick( $this, groupCount, groupY );
}
});
return this;
},
// reset
_masonryReset : function() {
// layout-specific props
this.masonry = {};
// FIXME shouldn't have to call this again
this._getSegments('masonry');
var i = this.masonry.cols;
this.masonry.colYs = [];
while (i--) {
this.masonry.colYs.push( this.posTop );
}
return this;
},
_masonryResize : function() {
var prevColCount = this.masonry.cols;
// get updated colCount
this._getSegments('masonry');
if ( this.masonry.cols !== prevColCount ) {
// if column count has changed, do a new column cound
this.reLayout();
}
return this;
},
_masonryGetContainerSize : function() {
var containerHeight = Math.max.apply( Math, this.masonry.colYs ) - this.posTop;
return { height: containerHeight };
},
// ====================== fitRows ======================
_fitRowsLayout : function( $elems ) {
this.width = this.element.width();
var instance = this;
$elems.each( function() {
var $this = $(this),
atomW = $this.outerWidth(true),
atomH = $this.outerHeight(true),
x, y;
if ( instance.fitRows.x !== 0 && atomW + instance.fitRows.x > instance.width ) {
// if this element cannot fit in the current row
instance.fitRows.x = 0;
instance.fitRows.y = instance.fitRows.height;
}
// position the atom
x = instance.fitRows.x + instance.posLeft;
y = instance.fitRows.y + instance.posTop;
instance._pushPosition( $this, x, y );
instance.fitRows.height = Math.max( instance.fitRows.y + atomH, instance.fitRows.height );
instance.fitRows.x += atomW;
});
return this;
},
_fitRowsReset : function() {
this.fitRows = {
x : 0,
y : 0,
height : 0
};
return this;
},
_fitRowsGetContainerSize : function () {
return { height : this.fitRows.height };
},
_fitRowsResize : function() {
return this.reLayout();
},
// ====================== cellsByRow ======================
_cellsByRowReset : function() {
this.cellsByRow = {};
this._getSegments('cellsByRow');
this.cellsByRow.rowHeight = this.options.cellsByRow.rowHeight || this.$allAtoms.outerHeight(true);
return this;
},
_cellsByRowLayout : function( $elems ) {
var instance = this,
cols = this.cellsByRow.cols;
this.cellsByRow.atomsLen = $elems.length;
$elems.each( function( i ){
var $this = $(this),
x = ( i % cols + 0.5 ) * instance.cellsByRow.columnWidth -
$this.outerWidth(true) / 2 + instance.posLeft,
y = ( ~~( i / cols ) + 0.5 ) * instance.cellsByRow.rowHeight -
$this.outerHeight(true) / 2 + instance.posTop;
instance._pushPosition( $this, x, y );
});
return this;
},
_cellsByRowGetContainerSize : function() {
return { height : Math.ceil( this.cellsByRow.atomsLen / this.cellsByRow.cols ) * this.cellsByRow.rowHeight + this.posTop };
},
_cellsByRowResize : function() {
var prevCols = this.cellsByRow.cols;
this._getSegments('cellsByRow');
// if column count has changed, do a new column cound
if ( this.cellsByRow.cols !== prevCols ) {
this.reLayout();
}
return this;
},
// ====================== straightDown ======================
_straightDownReset : function() {
this.straightDown = {
y : 0
};
return this;
},
_straightDownLayout : function( $elems ) {
var instance = this;
$elems.each( function( i ){
var $this = $(this),
y = instance.straightDown.y + instance.posTop;
instance._pushPosition( $this, instance.posLeft, y );
instance.straightDown.y += $this.outerHeight(true);
});
return this;
},
_straightDownGetContainerSize : function() {
return { height : this.straightDown.y + this.posTop };
},
_straightDownResize : function() {
this.reLayout();
return this;
},