## mark a section (Learn more)

/** * @author Bruno Bornsztein <bruno@missingmethod.com> * @copyright 2007 Curbly LLC * @package Slider * @license MIT * @url http://www.missingmethod.com/projects/slider/ * @version 0.0.1 * @dependencies prototype.js, effects.js */ var ViewMaster = Class.create(); ViewMaster.prototype = { initialize: function(wrapper, options){ this.scrolling = false; this.wrapper = $(wrapper); this.scroller = this.wrapper.down('div.scroller'); this.sections = this.wrapper.getElementsBySelector('div.selection'); this.options = Object.extend({ duration: 1.0 }, options || {}); this.sections.each( function(section, index) { section._index = index; }); this.events = { click: this.click.bind(this) }; this.addObservers(); }, addObservers: function() { var controls = this.wrapper.getElementsBySelector('div.controls a'); controls.invoke('observe', 'click', this.events.click); }, click: function(event) { var element = Event.findElement(event, 'a'); if (this.scrolling) this.scrolling.cancel(); this.moveTo(element.href.split("#")[1], this.scroller, { duration:this.options.duration }); Event.stop(event); }, moveTo: function(element, container, options){ this.current = element; var containerOffset = Position.cumulativeOffset(container), elementOffset = Position.cumulativeOffset(element); this.scrolling = new Effect.HorizontalScroll(container, { duration: this.options.duration, x: (element[0] - container[0]), y:(element[1] - container[1]) }); return false; }, next: function(){ if (this.current) { var currentIndex = this.current._index; var nextIndex = (this.sections.length - 1 == currentIndex) ? 0 : currentIndex + 1; } else var nextIndex = 1; this.moveTo(this.sections[nextIndex], this.scroller, { duration: this.options.duration }); }, previous: function(){ if (this.current) { var currentIndex = this.current._index; var prevIndex = (currentIndex == 0) ? this.sections.length - 1 : currentIndex - 1; } else var prevIndex = this.sections.length - 1; this.moveTo(this.sections[prevIndex], this.scroller, { duration: this.options.duration }); } }; Effect.HorizontalScroll = Class.create(); Object.extend(Object.extend(Effect.Scroll.prototype, Effect.Base.prototype), { initialize: function(element) { this.element = $(element); var options = Object.extend({ x: 0, y: 0, mode: 'absolute' } , arguments[1] || {} ); this.start(options); }, setup: function() { if (this.options.continuous && !this.element._ext ) { this.element.cleanWhitespace(); this.element._ext=true; this.element.appendChild(this.element.firstChild); } this.originalLeft = this.element.scrollLeft; this.originalTop = this.element.scrollTop; if (this.options.mode == 'absolute') { this.options.x -= this.originalLeft; this.options.y -= this.originalTop; } }, update: function(position) { this.element.scrollLeft = this.options.x * position + this.originalLeft; this.element.scrollTop = this.options.y * position + this.originalTop; } });

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