/**
 * jQuery Roundabout - v1.0 (minified)
 * http://fredhq.com/projects/roundabout/
 *
 * Moves list-items of enabled ordered and unordered lists long
 * a chosen path. Includes the default "lazySusan" path, that
 * moves items long a spinning turntable.
 *
 * Terms of Use // jQuery Roundabout
 * 
 * Open source under the BSD license
 *
 * Copyright (c) 2009, Fred LeBlanc
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without 
 * modification, are permitted provided that the following conditions are met:
 * 
 *   - Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *   - Redistributions in binary form must reproduce the above 
 *     copyright notice, this list of conditions and the following 
 *     disclaimer in the documentation and/or other materials provided 
 *     with the distribution.
 *   - Neither the name of the author nor the names of its contributors 
 *     may be used to endorse or promote products derived from this 
 *     software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE 
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 
 * POSSIBILITY OF SUCH DAMAGE.
 */
jQuery.extend({ roundabout_shape: { def: 'lazySusan', lazySusan: function (r, a, t) { return { x: Math.sin(r + a), y: (Math.sin(r + 3 * Math.PI / 2 + a) / 8) * t, z: (Math.cos(r + a) + 1) / 2, scale: (Math.sin(r + Math.PI / 2 + a) / 2) + 0.5} } } }); jQuery.fn.roundabout = function () { var options = (typeof arguments[0] != 'object') ? {} : arguments[0]; options = { bearing: (typeof options.bearing == 'undefined') ? 0.0 : parseFloat(options.bearing % 360.0, 4), tilt: (typeof options.tilt == 'undefined') ? 0.0 : parseFloat(options.tilt, 4), minZ: (typeof options.minZ == 'undefined') ? 100 : parseInt(options.minZ, 10), maxZ: (typeof options.maxZ == 'undefined') ? 400 : parseInt(options.maxZ, 10), minOpacity: (typeof options.minOpacity == 'undefined') ? 0.40 : parseFloat(options.minOpacity, 2), maxOpacity: (typeof options.maxOpacity == 'undefined') ? 1.00 : parseFloat(options.maxOpacity, 2), minScale: (typeof options.minScale == 'undefined') ? 0.40 : parseFloat(options.minScale, 2), maxScale: (typeof options.maxScale == 'undefined') ? 1.00 : parseFloat(options.maxScale, 2), duration: (typeof options.duration == 'undefined') ? 600 : parseInt(options.duration, 10), btnNext: options.btnNext || null, btnPrev: options.btnPrev || null, easing: options.easing || 'swing', clickToFocus: (options.clickToFocus !== false), focusBearing: (typeof options.focusBearing == 'undefined') ? 0.0 : parseFloat(options.focusBearing % 360.0, 4), shape: options.shape || 'lazySusan', debug: options.debug || false, childSelector: options.childSelector || 'li', startingChild: (typeof options.startingChild == 'undefined') ? null : parseInt(options.startingChild, 10) }; this.each(function (i) { var ref = jQuery(this); var childSelector = options.childSelector; var children = ref.children(childSelector); var period = 360.0 / children.length; var startingBearing = (options.startingChild === null) ? options.bearing : options.startingChild * period; ref.addClass('roundabout-holder').css('padding', 0).css('position', 'relative').css('z-index', options.minZ).attr('bearing', startingBearing).attr('tilt', options.tilt).attr('minZ', options.minZ).attr('maxZ', options.maxZ).attr('minOpacity', options.minOpacity).attr('maxOpacity', options.maxOpacity).attr('minScale', options.minScale).attr('maxScale', options.maxScale).attr('duration', options.duration).attr('easing', options.easing).attr('clickToFocus', options.clickToFocus).attr('focusBearing', options.focusBearing).attr('animating', '0').attr('childInFocus', -1).attr('shape', options.shape).attr('period', period).attr('debug', options.debug).attr('childSelector', options.childSelector); children.each(function (i) { var degrees = period * i; var startPos; jQuery(this).addClass('roundabout-moveable-item').css('position', 'absolute').attr('degrees', degrees); startPos = [jQuery(this).width(), jQuery(this).height(), parseInt(jQuery(this).css('font-size'), 10)]; jQuery(this).attr('startPos', startPos.join(',')); if (options.clickToFocus === true) { jQuery(this).click(function (e) { if (!jQuery.roundabout_isInFocus(ref, degrees)) { e.preventDefault(); if (ref.attr('animating') == '0') { ref.roundabout_animateAngleToFocus(degrees) } return false } }) } }); if (options.btnNext) { jQuery(options.btnNext).click(function (e) { e.preventDefault(); if (ref.attr('animating') == '0') { ref.roundabout_animateToNextChild() } return false }) } if (options.btnPrev) { jQuery(options.btnPrev).click(function (e) { e.preventDefault(); if (ref.attr('animating') == '0') { ref.roundabout_animateToPreviousChild() } return false }) } ref.roundabout_updateChildPositions() }); return this }; jQuery.fn.roundabout_setTilt = function (newTilt) { this.each(function (i) { jQuery(this).attr('tilt', newTilt); jQuery(this).roundabout_updateChildPositions() }); return this }; jQuery.fn.roundabout_setBearing = function (newBearing) { this.each(function (i) { jQuery(this).attr('bearing', parseFloat(newBearing % 360, 4)); jQuery(this).roundabout_updateChildPositions() }); if (typeof arguments[1] === 'function') { var callback = arguments[1]; setTimeout(function () { callback() }, 0) } return this }; jQuery.fn.roundabout_adjustBearing = function (delta) { delta = parseFloat(delta, 4); if (delta !== 0) { this.each(function (i) { jQuery(this).attr('bearing', jQuery.roundabout_getBearing(jQuery(this)) + delta); jQuery(this).roundabout_updateChildPositions() }) } return this }; jQuery.fn.roundabout_adjustTilt = function (delta) { delta = parseFloat(delta, 4); this.each(function (i) { jQuery(this).attr('tilt', parseFloat(jQuery(this).attr('tilt'), 4) + delta); jQuery(this).roundabout_updateChildPositions() }); return this }; jQuery.fn.roundabout_animateToBearing = function (bearing) { bearing = parseFloat(bearing, 4); var currentTime = new Date(); var data = (typeof arguments[3] !== 'object') ? null : arguments[3]; var duration = (typeof arguments[1] == 'undefined') ? null : arguments[1]; var easingType = (typeof arguments[2] != 'undefined') ? arguments[2] : null; this.each(function (i) { var ref = jQuery(this), timer, easingFn, newBearing; var thisDuration = (duration === null) ? parseInt(ref.attr('duration'), 10) : duration; var thisEasingType = (easingType !== null) ? easingType : ref.attr('easing') || 'swing'; if (data === null) { data = { timerStart: currentTime, start: jQuery.roundabout_getBearing(ref), totalTime: thisDuration} } timer = currentTime - data.timerStart; if (timer < thisDuration) { ref.attr('animating', '1'); if (typeof jQuery.easing.def == 'string') { easingFn = jQuery.easing[thisEasingType] || jQuery.easing[jQuery.easing.def]; newBearing = easingFn(null, timer, data.start, bearing - data.start, data.totalTime) } else { newBearing = jQuery.easing[thisEasingType]((timer / data.totalTime), timer, data.start, bearing - data.start, data.totalTime) } ref.roundabout_setBearing(newBearing, function () { ref.roundabout_animateToBearing(bearing, thisDuration, thisEasingType, data) }) } else { bearing = (bearing < 0) ? bearing + 360 : bearing % 360; ref.attr('animating', '0'); ref.roundabout_setBearing(bearing) } }); return this }; jQuery.fn.roundabout_animateToDelta = function (delta) { var duration, easing; if (typeof arguments[1] !== 'undefined') { duration = arguments[1] } if (typeof arguments[2] !== 'undefined') { easing = arguments[2] } this.each(function (i) { delta = jQuery.roundabout_getBearing(jQuery(this)) + delta; jQuery(this).roundabout_animateToBearing(delta, duration, easing) }); return this }; jQuery.fn.roundabout_animateToChild = function (childPos) { var duration, easing; if (typeof arguments[1] !== 'undefined') { duration = arguments[1] } if (typeof arguments[2] !== 'undefined') { easing = arguments[2] } this.each(function (i) { var ref = jQuery(this); if (parseInt(ref.attr('childInFocus'), 10) !== childPos && ref.attr('animating', '0')) { var child = jQuery(ref.children(ref.attr('childSelector'))[childPos]); ref.roundabout_animateAngleToFocus(parseFloat(child.attr('degrees'), 4), duration, easing) } }); return this }; jQuery.fn.roundabout_animateToNextChild = function () { var duration, easing; if (typeof arguments[0] !== 'undefined') { duration = arguments[0] } if (typeof arguments[1] !== 'undefined') { easing = arguments[1] } this.each(function (i) { if (jQuery(this).attr('animating', '0')) { var bearing = 360.0 - jQuery.roundabout_getBearing(jQuery(this)); var period = parseFloat(jQuery(this).attr('period'), 4), j = 0, range; while (true) { range = { lower: period * j, upper: period * (j + 1) }; if (bearing <= range.upper && bearing > range.lower) { jQuery(this).roundabout_animateToDelta(bearing - range.lower, duration, easing); break } j++ } } }); return this }; jQuery.fn.roundabout_animateToPreviousChild = function () { var duration, easing; if (typeof arguments[0] !== 'undefined') { duration = arguments[0] } if (typeof arguments[1] !== 'undefined') { easing = arguments[1] } this.each(function (i) { if (jQuery(this).attr('animating', '0')) { var bearing = 360.0 - jQuery.roundabout_getBearing(jQuery(this)); var period = parseFloat(jQuery(this).attr('period'), 4), j = 0, range; while (true) { range = { lower: period * j, upper: period * (j + 1) }; if (bearing >= range.lower && bearing < range.upper) { jQuery(this).roundabout_animateToDelta(bearing - range.upper, duration, easing); break } j++ } } }); return this }; jQuery.fn.roundabout_animateAngleToFocus = function (target) { var duration, easing; if (typeof arguments[1] !== 'undefined') { duration = arguments[1] } if (typeof arguments[2] !== 'undefined') { easing = arguments[2] } this.each(function (i) { var delta = jQuery.roundabout_getBearing(jQuery(this)) - target; delta = (Math.abs(360.0 - delta) < Math.abs(0.0 - delta)) ? 360.0 - delta : 0.0 - delta; delta = (delta > 180) ? -(360.0 - delta) : delta; if (delta !== 0) { jQuery(this).roundabout_animateToDelta(delta, duration, easing) } }); return this }; jQuery.fn.roundabout_updateChildPositions = function () { this.each(function (i) { var ref = jQuery(this); var inFocus = -1; var data = { bearing: jQuery.roundabout_getBearing(ref), tilt: parseFloat(ref.attr('tilt'), 4), stage: { width: Math.floor(ref.width() * 0.9), height: Math.floor(ref.height() * 0.9) }, animating: ref.attr('animating'), inFocus: parseInt(ref.attr('childInFocus'), 10), focusBearingRad: jQuery.roundabout_degToRad(parseFloat(ref.attr('focusBearing'), 4)), shape: jQuery.roundabout_shape[ref.attr('shape')] || jQuery.roundabout_shape[jQuery.roundabout_shape.def] }; data.midStage = { width: data.stage.width / 2, height: data.stage.height / 2 }; data.nudge = { width: data.midStage.width + data.stage.width * 0.05, height: data.midStage.height + data.stage.height * 0.05 }; data.zValues = { min: parseInt(ref.attr('minZ'), 10), max: parseInt(ref.attr('maxZ'), 10) }; data.zValues.diff = data.zValues.max - data.zValues.min; data.opacity = { min: parseFloat(ref.attr('minOpacity'), 2), max: parseFloat(ref.attr('maxOpacity'), 2) }; data.opacity.diff = data.opacity.max - data.opacity.min; data.scale = { min: parseFloat(ref.attr('minScale'), 2), max: parseFloat(ref.attr('maxScale'), 2) }; data.scale.diff = data.scale.max - data.scale.min; ref.children(ref.attr('childSelector')).each(function (i) { if (jQuery.roundabout_updateChildPosition(jQuery(this), ref, data, i) && data.animating == '0') { inFocus = i; jQuery(this).addClass('roundabout-in-focus') } else { jQuery(this).removeClass('roundabout-in-focus') } }); if (inFocus !== data.inFocus) { jQuery.roundabout_triggerEvent(ref, data.inFocus, 'blur'); if (inFocus !== -1) { jQuery.roundabout_triggerEvent(ref, inFocus, 'focus') } ref.attr('childInFocus', inFocus) } }); return this }; jQuery.roundabout_getBearing = function (el) { return parseFloat(el.attr('bearing'), 4) % 360 }; jQuery.roundabout_degToRad = function (degrees) { return (degrees % 360.0) * Math.PI / 180.0 }; jQuery.roundabout_isInFocus = function (el, target) { return (jQuery.roundabout_getBearing(el) % 360 === (target % 360)) }; jQuery.roundabout_triggerEvent = function (el, child, eventType) { return (child < 0) ? this : jQuery(el.children(el.attr('childSelector'))[child]).trigger(eventType) };jQuery.roundabout_updateChildPosition = function (child, container, data, childPos) {
    var ref = jQuery(child), out = [];
    var startPos = ref.attr('startPos').split(',');
    var itemData = { startWidth: startPos[0], startHeight: startPos[1], startFontSize: startPos[2], degrees: parseFloat(ref.attr('degrees'), 4) };
    var rad = jQuery.roundabout_degToRad((360.0 - itemData.degrees) + data.bearing);
    while (rad < 0) { rad = rad + Math.PI * 2 }
    while (rad > Math.PI * 2) { rad = rad - Math.PI * 2 }
    var factors = data.shape(rad, data.focusBearingRad, data.tilt);
    factors.scale = (factors.scale > 1) ? 1 : factors.scale;
    factors.adjustedScale = (data.scale.min + (data.scale.diff * factors.scale)).toFixed(4);
    factors.width = factors.adjustedScale * itemData.startWidth;
    factors.height = factors.adjustedScale * itemData.startHeight;

    //alert('factors.width = ' + factors.width.toFixed(2) + ';  factors.height = ' + factors.height.toFixed(2));

    ref.css('left', ((factors.x * data.midStage.width + data.nudge.width) - factors.width / 2.0).toFixed(2) + 'px')
    .css('top', ((factors.y * data.midStage.height + data.nudge.height) - factors.height / 2.0).toFixed(2) + 'px')
        //.css('width', factors.width.toFixed(2) + 'px')
    .css('width', '112px')
        //.css('height', factors.height.toFixed(2) + 'px')
    .css('height', '120px')
    .css('opacity', (data.opacity.min + (data.opacity.diff * factors.scale)).toFixed(2)).css('z-index', parseInt(data.zValues.min + (data.zValues.diff * factors.z), 10)).css('font-size', (factors.adjustedScale * itemData.startFontSize).toFixed(2) + 'px').attr('current-scale', factors.adjustedScale);
    if (container.attr('debug') == 'true') {
        out.push('<div style="font-weight: normal; font-size: 10px; padding: 2px; width: ' + ref.css('width') + '; background-color: #ffc;">');
        out.push('<strong style="font-size: 12px; white-space: nowrap;">Child ' + childPos + '</strong><br />');
        out.push('<strong>left:</strong> ' + ref.css('left') + '<br /><strong>top:</strong> ' + ref.css('top') + '<br />');
        out.push('<strong>width:</strong> ' + ref.css('width') + '<br /><strong>opacity:</strong> ' + ref.css('opacity') + '<br />');
        out.push('<strong>z-index:</strong> ' + ref.css('z-index') + '<br /><strong>font-size:</strong> ' + ref.css('font-size') + '<br />');
        out.push('<strong>scale:</strong> ' + ref.attr('current-scale'));
        out.push('</div>'); ref.html(out.join(''))
    } 
        return jQuery.roundabout_isInFocus(container, itemData.degrees)
};