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|
/*
* Moving Boxes v2.2.1
* by Chris Coyier
* http://css-tricks.com/moving-boxes/
*/
(function($){
$.movingBoxes = function(el, options){
// To avoid scope issues, use 'base' instead of 'this'
// to reference this class from internal events and functions.
var o, base = this;
// Access to jQuery and DOM versions of element
base.$el = $(el).addClass('mb-slider');
base.el = el;
// Add a reverse reference to the DOM object
base.$el.data('movingBoxes', base);
base.init = function(){
base.options = o = $.extend({}, $.movingBoxes.defaultOptions, options);
// Setup formatting (to reduce the amount of initial HTML)
base.$el.wrap('<div class="movingBoxes mb-wrapper"><div class="mb-scroll" /></div>');
// defaults
base.$window = base.$el.parent(); // mb-scroll
base.$wrap = base.$window.parent() // mb-wrapper
.css({ width : o.width }) // override css width
.prepend('<a class="mb-scrollButtons mb-left"></a>')
.append('<a class="mb-scrollButtons mb-right"></a><div class="mb-left-shadow"></div><div class="mb-right-shadow"></div>');
base.$panels = base.$el.children().addClass('mb-panel');
base.runTime = $('.mb-slider').index(base.$el) + 1; // Get index (run time) of this slider on the page
base.regex = new RegExp('slider' + base.runTime + '=(\\d+)', 'i'); // hash tag regex
base.initialized = false;
base.currentlyMoving = false;
base.curPanel = 1;
// Set up click on left/right arrows
base.$left = base.$wrap.find('.mb-left').click(function(){
base.goBack();
return false;
});
base.$right = base.$wrap.find('.mb-right').click(function(){
base.goForward();
return false;
});
// code to run to update MovingBoxes when the number of panels change
base.update();
$(window).load(function(){ base.update(false); }); // animate height after all images load
// go to clicked panel
base.$el.delegate('.mb-panel', 'click', function(){
base.change( base.$panels.index($(this)) + base.adj );
});
// Activate moving box on click or when an internal link obtains focus
base.$wrap.click(function(){
base.active();
});
base.$panels.delegate('a', 'focus' ,function(){
// focused link centered in moving box
var loc = base.$panels.index($(this).closest('.mb-panel')) + 1;
if (loc !== base.curPanel){ base.change( base.$panels.index($(this).closest('.mb-panel')) + 1, {}, false ); }
});
// Add keyboard navigation
$(document).keyup(function(e){
// ignore arrow/space keys if inside a form element
if (e.target.tagName.match('TEXTAREA|INPUT|SELECT')) { return; }
switch (e.which) {
case 39: case 32: // right arrow & space
if (base.$wrap.is('.mb-active-slider')){
base.goForward();
}
break;
case 37: // left arrow
if (base.$wrap.is('.mb-active-slider')){
base.goBack();
}
break;
}
});
// Set up "Current" panel
var startPanel = (o.hashTags) ? base.getHash() || o.startPanel : o.startPanel;
// Bind Events
$.each('initialized initChange beforeAnimation completed'.split(' '), function(i,evt){
if ($.isFunction(o[evt])){
base.$el.bind(evt + '.movingBoxes', o[evt]);
}
});
// animate to chosen start panel - starting from the first panel makes it look better
setTimeout(function(){
base.change(startPanel, function(){
base.initialized = true;
base.$el.trigger( 'initialized.movingBoxes', [ base, startPanel ] );
});
}, o.speed * 2 );
};
// update the panel, flag is used to prevent events from firing
base.update = function(flag){
var t;
// Infinite loop
base.$el.children('.cloned').remove();
base.$panels = base.$el.children();
base.adj = (o.wrap && base.$panels.length > 1) ? 0 : 1; // count adjustment for infinite panels
if (o.wrap && base.$panels.length > 1) {
base.$el.prepend( base.$panels.filter(':last').clone().removeAttr('id').addClass('cloned') );
base.$el.append( base.$panels.filter(':first').clone().removeAttr('id').addClass('cloned') );
base.$el.find('.cloned').each(function(){
// disable all focusable elements in cloned panels to prevent shifting the panels by tabbing
$(this).find('a,input,textarea,select,button,area').attr('disabled', 'disabled');
$(this).find('[id]').removeAttr('id');
});
}
// Set up panes & content sizes; default: panelWidth = 50% of entire width
base.$panels = base.$el.children()
.addClass('mb-panel')
.css({ width : o.width * o.panelWidth, margin: 0 })
// inner wrap of each panel
.each(function(){
if ($(this).find('.mb-inside').length === 0) {
$(this).wrapInner('<div class="mb-inside" />');
}
});
base.totalPanels = base.$panels.length;
base.totalPanels -= (o.wrap && base.totalPanels > 1) ? 2 : 0; // don't include cloned panels in total
// save 'cur' numbers (current larger panel size), use stored sizes if they exist
t = base.$panels.eq(base.curPanel - base.adj);
base.curWidth = base.curWidth || t.outerWidth();
// save 'reg' (reduced size) numbers
base.regWidth = base.curWidth * o.reducedSize;
// set image heights so base container height is correctly set
base.$panels.css({ width: base.curWidth, fontSize: '1em' }); // make all panels big
// save each panel height... script will resize container as needed
// make sure current panel css is applied before measuring
base.$panels.eq(base.curPanel - base.adj).addClass(o.currentPanel);
base.heights = base.$panels.map(function(i,e){ return $(e).outerHeight(true); }).get();
base.returnToNormal(base.curPanel, 0); // resize new panel, animation time
base.growBigger(base.curPanel, 0, flag);
base.updateArrows(base.curPanel);
// make base container wide enough to contain all the panels
base.$el.css({
position : 'absolute',
// add a bit more width to each box (100px should cover margin/padding, etc; then add 1/2 overall width in case only one panel exists
width : (base.curWidth + 100) * base.$panels.length + (o.width - base.curWidth) / 2,
height : Math.max.apply( this, base.heights ) + 10
});
base.$window.css({ height : (o.fixedHeight) ? Math.max.apply( this, base.heights ) : base.heights[base.curPanel - base.adj] });
// add padding so scrollLeft = 0 centers the left-most panel (needed because scrollLeft cannot be < 0)
base.$panels.eq(0).css({ 'margin-left' : (o.width - base.curWidth) / 2 });
base.buildNav();
base.change(base.curPanel, null, true); // initialize from first panel... then scroll to start panel
};
// Creates the numbered navigation links
base.buildNav = function() {
if (base.$nav) { base.$nav.remove(); }
if (o.buildNav && base.totalPanels > 1) {
base.$nav = $('<div class="mb-controls"><a class="mb-testing"></a></div>').appendTo(base.$wrap);
var j, a = '',
navFormat = $.isFunction(o.navFormatter),
// need link in place to get CSS properties
hiddenText = parseInt( base.$nav.find('.mb-testing').css('text-indent'), 10) < 0;
base.$panels.filter(':not(.cloned)').each(function(i) {
j = i + 1;
a += '<a href="#" class="mb-panel' + j;
// If a formatter function is present, use it
if (navFormat) {
var tmp = o.navFormatter(j, $(this));
// Add formatting to title attribute if text is hidden
a += (hiddenText) ? ' ' + o.tooltipClass +'" title="' + tmp : '';
a += '">' + tmp + '</a> ';
} else {
a += '">' + j + '</a> ';
}
});
base.$nav
.html(a)
.find('a').bind('click', function() {
base.change( $(this).index() + 1 );
return false;
});
}
};
// Resize panels to normal
base.returnToNormal = function(num, time){
var panels = base.$panels.not(':eq(' + (num - base.adj) + ')').removeClass(o.currentPanel);
if (o.reducedSize === 1) {
panels.css({ width: base.regWidth }); // excluding fontsize change to prevent video flicker
} else {
panels.animate({ width: base.regWidth, fontSize: o.reducedSize + 'em' }, (time === 0) ? 0 : o.speed);
}
};
// Zoom in on selected panel
base.growBigger = function(num, time, flag){
var panels = base.$panels.eq(num - base.adj);
if (o.reducedSize === 1) {
panels.css({ width: base.curWidth }); // excluding fontsize change to prevent video flicker
if (base.initialized) { base.completed(num, flag); }
} else {
panels.animate({ width: base.curWidth, fontSize: '1em' }, (time === 0) ? 0 : o.speed, function(){
// completed event trigger
// even though animation is not queued, trigger is here because it is the last animation to complete
if (base.initialized) { base.completed(num, flag); }
});
}
};
base.completed = function(num, flag){
// add current panel class after animating in case it has sizing parameters
base.$panels.eq(num - base.adj).addClass(o.currentPanel);
if (flag !== false) { base.$el.trigger( 'completed.movingBoxes', [ base, num ] ); }
};
// go forward/back
base.goForward = function(){
if (base.initialized) {
base.change(base.curPanel + 1);
}
};
base.goBack = function(){
if (base.initialized) {
base.change(base.curPanel - 1);
}
};
// Change view to display selected panel
base.change = function(curPanel, callback, flag){
if (base.totalPanels < 1) {
if (typeof(callback) === 'function') { callback(base); }
return;
}
var ani, leftValue, wrapped = false;
// make sure it's a number and not a string
curPanel = parseInt(curPanel, 10);
if (base.initialized) {
// make this moving box active
base.active();
// initChange event - has extra parameter with targeted panel (not cleaned)
base.$el.trigger( 'initChange.movingBoxes', [ base, curPanel ] );
}
// Make infinite scrolling work
if (o.wrap) {
if (curPanel > base.totalPanels) {
wrapped = true;
curPanel = 1;
base.returnToNormal(0, 0);
base.growBigger(0, 0, false);
leftValue = base.$panels.eq(0).position().left - (o.width - base.curWidth) / 2; // - ( base.curWidth - base.regWidth );
base.$window.scrollLeft(leftValue);
} else if (curPanel === 0) {
wrapped = false;
curPanel = base.totalPanels;
base.growBigger(curPanel + 1, 0, false);
leftValue = base.$panels.eq(curPanel + 1).position().left - (o.width - base.curWidth) / 2; // - ( base.curWidth - base.regWidth );
base.$window.scrollLeft(leftValue);
}
}
if ( curPanel < base.adj ) { curPanel = (o.wrap) ? base.totalPanels : 1; }
if ( curPanel > base.totalPanels - base.adj ) { curPanel = (o.wrap) ? 1 : base.totalPanels; }
// don't do anything if it's the same panel
if (base.initialized && base.curPanel === curPanel && !flag) { return false; }
// abort if panel is already animating
// animation callback to clear this flag is not called when the slider doesn't move, so include base.initialized
if (!base.currentlyMoving || !base.initialized) {
base.currentlyMoving = true;
// center panel in scroll window
leftValue = base.$panels.eq(curPanel - base.adj).position().left - (o.width - base.curWidth) / 2;
// when scrolling right, add the difference of the larger current panel width
if (curPanel > base.curPanel || wrapped) { leftValue -= ( base.curWidth - base.regWidth ); }
ani = (o.fixedHeight) ? { scrollLeft : leftValue } : { scrollLeft: leftValue, height: base.heights[curPanel - base.adj] };
// before animation trigger
if (base.initialized) { base.$el.trigger( 'beforeAnimation.movingBoxes', [ base, curPanel ] ); }
// animate the panels
base.$window.animate( ani,
{
queue : false,
duration : o.speed,
easing : o.easing,
complete : function(){
base.curPanel = curPanel;
if (base.initialized) {
base.$window.scrollTop(0); // Opera fix - otherwise, it moves the focus link to the middle of the viewport
}
base.currentlyMoving = false;
if (typeof(callback) === 'function') { callback(base); }
}
}
);
base.returnToNormal(curPanel);
base.growBigger(curPanel);
if (!o.wrap) { base.updateArrows(curPanel); }
if (o.hashTags && base.initialized) { base.setHash(curPanel); }
}
// Update navigation links
if (o.buildNav && base.$nav) {
base.$nav.find('a')
.removeClass(o.currentPanel)
.eq(curPanel - 1).addClass(o.currentPanel);
}
};
base.updateArrows = function(cur){
base.$left.toggleClass(o.disabled, cur === base.adj);
base.$right.toggleClass(o.disabled, (cur === base.totalPanels || base.totalPanels === 0));
};
// get & set hash tags
base.getHash = function(){
var n = window.location.hash.match(base.regex);
return (n===null) ? '' : parseInt(n[1],10);
};
base.setHash = function(n){
var s = 'slider' + base.runTime + "=",
h = window.location.hash;
if ( typeof h !== 'undefined' ) {
window.location.hash = (h.indexOf(s) > 0) ? h.replace(base.regex, s + n) : h + "&" + s + n;
}
};
// Make moving box active (for keyboard navigation)
base.active = function(el){
$('.mb-active-slider').removeClass('mb-active-slider');
base.$wrap.addClass('mb-active-slider');
};
// get: var currentPanel = $('.slider').data('movingBoxes').currentPanel(); // returns # of currently selected/enlarged panel
// set: var currentPanel = $('.slider').data('movingBoxes').currentPanel(2, function(){ alert('done!'); }); // returns and scrolls to 2nd panel
base.currentPanel = function(panel, callback){
if (typeof(panel) !== 'undefined') {
base.change(panel, callback); // parse in case someone sends a string
}
return base.curPanel;
};
// Run initializer
base.init();
};
$.movingBoxes.defaultOptions = {
// Appearance
startPanel : 1, // start with this panel
width : 800, // overall width of movingBoxes
panelWidth : 0.5, // current panel width adjusted to 50% of overall width
reducedSize : 0.8, // non-current panel size: 80% of panel size
fixedHeight : false, // if true, slider height set to max panel height; if false, slider height will auto adjust.
// Behaviour
speed : 500, // animation time in milliseconds
hashTags : true, // if true, hash tags are enabled
wrap : false, // if true, the panel will "wrap" (it really rewinds/fast forwards) at the ends
buildNav : false, // if true, navigation links will be added
navFormatter : null, // function which returns the navigation text for each panel
easing : 'swing', // anything other than "linear" or "swing" requires the easing plugin
// Selectors & classes
currentPanel : 'current', // current panel class
tooltipClass : 'tooltip', // added to the navigation, but the title attribute is blank unless the link text-indent is negative
disabled : 'disabled',// class added to arrows that are disabled (left arrow when on first panel, right arrow on last panel)
// Callbacks
initialized : null, // callback when MovingBoxes has completed initialization
initChange : null, // callback upon change panel initialization
beforeAnimation : null, // callback before any animation occurs
completed : null // callback after animation completes
};
$.fn.movingBoxes = function(options, callback){
var num, mb;
return this.each(function(){
mb = $(this).data('movingBoxes');
// initialize the slider but prevent multiple initializations
if ((typeof(options)).match('object|undefined')){
if (mb) {
mb.update();
} else {
(new $.movingBoxes(this, options));
}
} else if (/\d/.test(options) && !isNaN(options) && mb) {
num = (typeof(options) === "number") ? options : parseInt($.trim(options),10); // accepts " 4 "
// ignore out of bound panels
if ( num >= 1 && num <= mb.totalPanels ) {
mb.change(num, callback); // page #, autoplay, one time callback
}
}
});
};
// Return the movingBoxes object
$.fn.getMovingBoxes = function(){
return this.data('movingBoxes');
};
})(jQuery); |
