ImageGrid/ui (gen4)/features/ui-slideshow.js

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* 
*
*
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define(function(require){ var module = {}

//var DEBUG = DEBUG != null ? DEBUG : true

var toggler = require('lib/toggler')
var actions = require('lib/actions')
var features = require('lib/features')

var core = require('features/core')
var base = require('features/base')

var widgets = require('features/ui-widgets')

var browse = require('lib/widget/browse')
var overlay = require('lib/widget/overlay')



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// NOTE: this uses ui-chrome-hidden workspace to set the initial state
// 		of the slideshow workspace.
//
// XXX would be a good idea to add provision for a timer to indicate 
// 		slideshow progress/status... 
// 			- make this a separate feature with a toggler
var SlideshowActions = actions.Actions({
	config: {
		'slideshow-looping': 'on',
		'slideshow-direction': 'forward',
		'slideshow-interval': '3s',
		'slideshow-interval-max-count': 7,

		'slideshow-intervals': [
			'0.2s',
			'1s',
			'3s',
			'5s',
			'7s',
		],
	},

	// XXX use widgets.makeNestedConfigListEditor(...)???
	slideshowIntervalDialog: ['Slideshow/Slideshow interval...',
		// XXX using both widgets.makeUIDialog(..) and widgets.makeConfigListEditor(..)
		// 		is a bit too complicated...
		widgets.makeUIDialog(function(){
			var that = this

			// suspend the timer if it's not suspended outside...
			var suspended_timer = this.__slideshouw_timer == 'suspended'
			suspended_timer || this.suspendSlideshowTimer()

			var button_text = 'New...'
			var o = widgets.makeConfigListEditor(that, 'slideshow-intervals', {
					path: that.config['slideshow-interval'],
					new_button: button_text,
					length_limit: that.config['slideshow-interval-max-count'],
					check: Date.str2ms,
					unique: Date.str2ms,
					sort: function(a, b){
						return Date.str2ms(a) - Date.str2ms(b) },
					// NOTE: this is called when adding a new value and 
					// 		list maximum length is reached...
					callback: function(value){
						that.config['slideshow-interval'] = value

						o.parent.close()
					},
				})
				.on('close', function(){
					// reset the timer if it was not suspended outside...
					suspended_timer || that.resetSlideshowTimer()
				})

			return o
		})],
	// XXX BUG: there are still problems with focus...
	// 		to reproduce:
	// 			click on the first option with a mouse...
	// 		result:
	// 			the top dialog is not focused...
	slideshowDialog: ['Slideshow/Slideshow...',
		widgets.makeUIDialog(function(){
			var that = this

			// suspend the timer if it's not suspended outside...
			var suspended_timer = this.__slideshouw_timer == 'suspended'
			suspended_timer || this.suspendSlideshowTimer()

			// XXX might be a good idea to make this generic...
			var _makeTogglHandler = function(toggler){
				return function(){
					var txt = $(this).find('.text').first().text()
					that[toggler]()
					o.update()
						.then(function(){ o.select(txt) })
					that.toggleSlideshow('?') == 'on' 
						&& o.parent.close()
				}
			}

			var o = browse.makeLister(null, function(path, make){
					make(['Interval: ', 
							function(){ return that.config['slideshow-interval'] }])
						.on('open', function(){
							var txt = $(this).find('.text').first().text()

							var oo = that.slideshowIntervalDialog()
								.on('close', function(){
									// slideshow is running -- close directly...
									if(that.toggleSlideshow('?') == 'on'){
										o.parent.close()

									} else {
										o.update()
											.then(function(){
												o.select(txt)
											})
									}
								})
								// update slideshow menu...
								.open(function(){
									o.update()
										.then(function(){
											o.select(txt)
										})
								})
						})

					make(['Direction: ', 
							function(){ return that.config['slideshow-direction'] }])
						.on('open', _makeTogglHandler('toggleSlideshowDirection'))
					make(['Looping: ', 
							function(){ return that.config['slideshow-looping'] }])
						.on('open', _makeTogglHandler('toggleSlideshowLooping'))

					// Start/stop...
					make([function(){ 
							return that.toggleSlideshow('?') == 'on' ? 'Stop' : 'Start' }])
						.on('open', function(){
							that.toggleSlideshow()
							o.parent.close()
						})
						.addClass('selected')
				})
				.on('close', function(){
					// reset the timer if it was not suspended outside...
					suspended_timer || that.resetSlideshowTimer()
				})

			o.dom
				.addClass('metadata-view tail-action')

			return o
		})],
	
	toggleSlideshowDirection: ['- Slideshow/Slideshow direction',
		core.makeConfigToggler('slideshow-direction', ['forward', 'reverse'])],
	toggleSlideshowLooping: ['- Slideshow/Slideshow looping',
		core.makeConfigToggler('slideshow-looping', ['on', 'off'])],

	toggleSlideshow: ['Slideshow/Slideshow quick toggle',
		toggler.CSSClassToggler(
			function(){ return this.ribbons.viewer }, 
			'slideshow-running',
			function(state){
				// start...
				if(state == 'on'){
					var that = this

					// reset the timer...
					// NOTE: this means we were in a slideshow mode so we do not
					// 		need to prepare...
					if(this.__slideshouw_timer){
						this.__slideshouw_timer != 'suspended'
							&& clearInterval(this.__slideshouw_timer)
						delete this.__slideshouw_timer

					// prepare for the slideshow...
					} else {
						// single image mode...
						this.toggleSingleImage('on')

						// save current workspace...
						this.pushWorkspace()

						// construct the slideshow workspace if it does
						// not exist...
						//
						// NOTE: this is partially redundant with the 
						// 		loadWorkspace.pre handler in the feature...
						if(this.workspaces['slideshow'] == null){
							this.loadWorkspace('ui-chrome-hidden') 
							this.saveWorkspace('slideshow') 
						}

						// load the slideshow workspace...
						this.loadWorkspace('slideshow')
					}

					// start the timer... 
					this.__slideshouw_timer = setInterval(function(){
						var cur = that.current

						// next step...
						that.config['slideshow-direction'] == 'forward' ?
							that.nextImage()
							: that.prevImage()

						// we have reached the end...
						if(that.current == cur){
							// loop...
							if(that.config['slideshow-looping'] == 'on'){
								that.config['slideshow-direction'] == 'forward' ?
									that.firstImage()
									: that.lastImage()

							// stop...
							} else {
								that.toggleSlideshow('off')
							}
						}
					}, Date.str2ms(this.config['slideshow-interval'] || '3s'))

				// stop...
				} else {
					// stop timer...
					this.__slideshouw_timer
						&& clearInterval(this.__slideshouw_timer)
					delete this.__slideshouw_timer

					// restore the original workspace...
					this.popWorkspace()
				}
			})],

	// NOTE: these can be used as pause and resume...
	resetSlideshowTimer: ['- Slideshow/',
		function(){
			this.__slideshouw_timer && this.toggleSlideshow('on')
		}],
	suspendSlideshowTimer: ['- Slideshow/',
		function(){
			if(this.__slideshouw_timer){
				clearInterval(this.__slideshouw_timer)
				this.__slideshouw_timer = 'suspended'
			}
		}],
})


var Slideshow = 
module.Slideshow = core.ImageGridFeatures.Feature({
	title: '',
	doc: '',

	tag: 'ui-slideshow',
	depends: [
		'ui',
		'ui-single-image',
	],

	actions: SlideshowActions,

	handlers: [
		// add a placeholder for slideshow workspace, this is to make the
		// workspace toggler show it as one of the options...
		//
		// NOTE: the slideshow workspace will get populated either on 
		// 		loading it for the first time or on first running a 
		// 		slideshow...
		['start',
			function(){ 
				if(this.workspaces['slideshow'] == null){
					this.workspaces['slideshow'] = null
				} 
			}],

		// build the slideshow workspace for the first time if it's not
		// present yet (is null)...
		['loadWorkspace.pre',
			function(workspace){
				if(workspace == 'slideshow' && this.workspaces['slideshow'] == null){
					return function(){
						this.loadWorkspace('ui-chrome-hidden') 
						this.saveWorkspace('slideshow') 
					}
				}
			}],

		// do not leave the viewer in slideshow mode...
		['stop',
			function(){ this.toggleSlideshow('off') }]
	],
})



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* vim:set ts=4 sw=4 :                                                */
return module })