mirror of
https://github.com/flynx/ImageGrid.git
synced 2025-10-29 10:20:08 +00:00
762 lines
19 KiB
JavaScript
Executable File
762 lines
19 KiB
JavaScript
Executable File
// XXX need a uniform way to address images (filename?)
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/******************************************* Setup Data and Globals **/
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// key configuration...
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// XXX need to make this handle modifiers gracefully...
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var keys = {
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toggleHelp: [72], // ???
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toggleSingleImageMode: [70, 13], // f, Enter
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toggleSingleImageModeTransitions: [84], // t
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toggleTransitions: [65], // a
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toggleBackgroundModes: [66], // b
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toggleControls: [9], // tab
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close: [27, 88, 67], // ???
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// zooming...
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zoomIn: [187], // +
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zoomOut: [189], // -
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// zoom presets...
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fitOne: [49], // 1
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fitThree: [51], // 3
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// XXX is this relivant?
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zoomOriginal: [48], // 0
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first: [36], // Home
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last: [35], // End
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previous: [37, 80, 188, 8], // Left, BkSp, p, <
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next: [39, 78, 190, 32], // Right, Space, n, >
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// these work with ctrl and shift modifiers...
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down: [40], // Down
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up: [38], // Up
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// these work with ctrl modifier...
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promote: [45], // ???
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demote: [46], // ???
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// XXX should these be s-up, s-down, ... ??
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moveViewUp: [75], // k
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moveViewDown: [74], // j
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moveViewLeft: [72], // h
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moveViewRight: [76], // l
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centerCurrentImage: [79], // o
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toggleMarkers: [77], // m
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// keys to be ignored...
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ignore: [16, 17, 18], // ???, ???, ???
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// print unhandled keys...
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helpShowOnUnknownKey: true
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}
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// the list of style modes...
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// these are swithched through in order by toggleBackgroundModes()
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var BACKGROUND_MODES = [
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'dark',
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'black'
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]
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// this sets the zooming factor used in manual zooming...
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var ZOOM_FACTOR = 2
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// sets the amoun of move when a key is pressed...
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var MOVE_DELTA = 50
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/********************************************************** Helpers **/
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// this will create a function that will add/remove a css_class to elem
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// calling the callbacks before and/or after.
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// NOTE: of only one callback is given then it will be called after the
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// class change...
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// a way around this is to pass an empty function as callback_b
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function createCSSClassToggler(elem, css_class, callback_a, callback_b){
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// prepare the pre/post callbacks...
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if(callback_b == null){
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var callback_pre = null
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var callback_post = callback_a
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} else {
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var callback_pre = callback_a
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var callback_post = callback_b
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}
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// build the acual toggler function...
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return function(action){
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if(action == null){
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action = 'on'
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// get current state...
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if( $(elem).hasClass(css_class) ){
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action = 'off'
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}
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}
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if(callback_pre != null){
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callback_pre(action)
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}
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// play with the class...
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if(action == 'on'){
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$(elem).addClass(css_class)
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} else {
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$(elem).removeClass(css_class)
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}
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if(callback_post != null){
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callback_post(action)
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}
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}
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}
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// disable transitions on obj, call func then enable transitions back...
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function doWithoutTransitions(obj, func){
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obj
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.addClass('unanimated')
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.one("webkitTransitionEnd oTransitionEnd msTransitionEnd transitionend", function(){
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func()
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$('.viewer')
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.one("webkitTransitionEnd oTransitionEnd msTransitionEnd transitionend", function(){
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obj.removeClass('unanimated')
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})
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})
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}
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// find an image object after which to position image ID...
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// used for two main tasks:
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// - positioning promoted/demoted images
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// - centering ribbons
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// returns:
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// - null - empty ribbon or no element greater id should be first
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// - element
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// XXX do we need to make ids numbers for this to work?
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function getImageBefore_lin(id, ribbon){
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// walk the ribbon till we find two images one with an ID less and
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// another greater that id...
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id = parseInt(id)
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var images = ribbon.children('.image')
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var prev = null
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for(var i=0; i < images.length; i++){
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if(parseInt($(images[i]).attr('id')) > id){
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return prev
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}
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prev = $(images[i])
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}
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return prev
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}
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// generic binery search for element just before the id...
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// NOTE: if id is in lst, this will return the element just before it.
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// NOTE: lst must be sorted.
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function binarySearch(id, lst, get){
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if(get == null){
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get = function(o){return o}
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}
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// empty list...
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if(lst.length == 0){
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return null
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}
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// current section length
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var l = Math.round((lst.length-1)/2)
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// current position...
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var i = l
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while(true){
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var i_id = get(lst[i])
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// beginning of the array...
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if(i == 0){
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if(id > i_id){
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return i
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}
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return null
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}
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// we got a hit...
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if(i_id == id){
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return i-1
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}
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// we are at the end...
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if(i == lst.length-1 && id > i_id){
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return i
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}
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var ii_id = get(lst[i+1])
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// test if id is between i and i+1...
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if( i_id < id && id < ii_id ){
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return i
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}
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// prepare for next iteration...
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// NOTE: we saturate the values so we will never get out of bounds.
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l = Math.round(l/2)
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if(id < i_id){
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// lower half...
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i = Math.max(0, i-l)
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} else {
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// upper half...
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i = Math.min(i+l, lst.length-1)
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}
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}
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}
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// wrapper around binarySearch.
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// this is here to make binarySearch simpler to test and debug...
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function getImageBefore_bin(id, ribbon){
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var images = ribbon.children('.image')
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var i = binarySearch(
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parseInt(id),
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images,
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function(o){return parseInt($(o).attr('id'))})
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if(i == null){
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return null
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}
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return $(images[i])
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}
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// set the default search...
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var getImageBefore = getImageBefore_bin
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/************************************************** Setup Functions **/
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// XXX is this a correct place for these?
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function setDefaultInitialState(){
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if($('.current.ribbon').length == 0){
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$('.ribbon').first().addClass('current')
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}
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if($('.current.image').length == 0){
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$('.current.ribbon').children('.image').first().addClass('current')
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}
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}
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function setupEvents(){
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// resize...
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$(window).resize(function() {
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// XXX HACK
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$('.current.image').click()
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})
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// keyboard...
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$(document)
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.keydown(handleKeys)
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// swipe...
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$('.viewer')
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.swipe({
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swipeLeft: nextImage,
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swipeRight: prevImage,
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swipeUp: shiftImageUp,
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swipeDown: shiftImageDown
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})
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}
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function setupControlElements(){
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// images...
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$(".image").click(setCurrentImage)
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// buttons...
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$('.screen-button.next-image').click(nextImage)
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$('.screen-button.prev-image').click(prevImage)
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// XXX rename classes to "shift-image-up" and "shift-image-down"...
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$('.screen-button.demote').click(shiftImageUp)
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$('.screen-button.promote').click(shiftImageDown)
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$('.screen-button.zoom-in').click(function(){scaleContainerBy(ZOOM_FACTOR)})
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$('.screen-button.zoom-out').click(function(){scaleContainerBy(1/ZOOM_FACTOR)})
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$('.screen-button.toggle-wide').click(toggleWideView)
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$('.screen-button.toggle-single').click(toggleSingleImageMode)
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$('.screen-button.fit-three').click(fitThreeImages)
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$('.screen-button.show-controls').click(showControls)
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$('.screen-button.settings').click(function(){alert('not implemented yet...')})
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}
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function loadImages(json){
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var images = json.images
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var ribbon = $('.ribbon').last()
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$('.image').remove()
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for(var i = 0; i < images.length; i++){
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$('<div class="image"></div>')
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.css({ 'background-image': 'url('+images[i]+')' })
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// set a unique id for each image...
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.attr({'id': i})
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.click(setCurrentImage)
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.appendTo(ribbon)
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}
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ribbon.children().first().click()
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}
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/*************************************************** Event Handlers **/
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function setCurrentImage(){
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// set classes...
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$('.current').removeClass('current')
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$(this)
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.addClass('current')
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.parents('.ribbon')
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.addClass('current')
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// position the field and ribbons...
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centerSquare()
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alignRibbons()
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}
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function clickAfterTransitionsDone(img){
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if(img == null){
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img = $('.current.image')
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}
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$('.viewer')
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.one("webkitTransitionEnd oTransitionEnd msTransitionEnd transitionend", function(){
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img.click()
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return true
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})
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}
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// center other ribbons relative to current image...
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// NOTE: only two ribbons are positioned at this point...
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function alignRibbons(){
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// XXX might be good to move this to a more generic location...
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var id = $('.current.image').attr('id')
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var directions = ['prev', 'next']
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for(var i in directions){
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var ribbon = $('.current.ribbon')[directions[i]]('.ribbon')
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if(ribbon.length == 1){
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var img = getImageBefore(id, ribbon)
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if(img != null){
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alignRibbon(img, 'before')
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} else {
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// there are no images before...
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alignRibbon(ribbon.children('.image').first(), 'after')
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}
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}
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}
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}
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// XXX revise...
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function handleKeys(event){
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var code = event.keyCode, fn = $.inArray;
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var _ = (fn(code, keys.close) >= 0) ? function(){}()
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: (fn(code, keys.first) >= 0) ? firstImage()
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: (fn(code, keys.next) >= 0) ? nextImage()
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: (fn(code, keys.previous) >= 0) ? prevImage()
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: (fn(code, keys.last) >= 0) ? lastImage()
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: (fn(code, keys.promote) >= 0) ? function(){
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if(event.ctrlKey){
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createRibbon('next')
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}
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shiftImageDown()
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}()
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: (fn(code, keys.demote) >= 0) ? function(){
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if(event.ctrlKey){
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createRibbon('prev')
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}
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shiftImageUp()
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}()
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: (fn(code, keys.down) >= 0) ? function(){
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if(event.shiftKey){
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if(event.ctrlKey){
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createRibbon('next')
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}
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shiftImageDown()
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} else {
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focusBelowRibbon()
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}
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}()
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: (fn(code, keys.up) >= 0) ? function(){
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if(event.shiftKey){
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if(event.ctrlKey){
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createRibbon('prev')
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}
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shiftImageUp()
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} else {
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focusAboveRibbon()
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}
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}()
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// zooming...
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: (fn(code, keys.zoomIn) >= 0) ? scaleContainerBy(ZOOM_FACTOR)
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: (fn(code, keys.zoomOut) >= 0) ? scaleContainerBy(1/ZOOM_FACTOR)
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// zoom presets...
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: (fn(code, keys.zoomOriginal) >= 0) ? setContainerScale(1)
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: (fn(code, keys.fitOne) >= 0) ? fitImage()
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: (fn(code, keys.fitThree) >= 0) ? fitThreeImages()
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// moving view...
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: (fn(code, keys.moveViewUp) >= 0) ? moveViewUp()
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: (fn(code, keys.moveViewDown) >= 0) ? moveViewDown()
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: (fn(code, keys.moveViewLeft) >= 0) ? moveViewLeft()
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: (fn(code, keys.moveViewRight) >= 0) ? moveViewRight()
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: (fn(code, keys.centerCurrentImage) >= 0) ? centerCurrentImage()
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: (fn(code, keys.toggleSingleImageMode) >= 0) ? toggleSingleImageMode()
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: (fn(code, keys.toggleSingleImageModeTransitions) >= 0) ? toggleSingleImageModeTransitions()
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: (fn(code, keys.toggleTransitions) >= 0) ? toggleTransitions()
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: (fn(code, keys.toggleBackgroundModes) >= 0) ? toggleBackgroundModes()
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: (fn(code, keys.toggleControls) >= 0) ? toggleControls()
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// debug...
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: (fn(code, keys.toggleMarkers) >= 0) ? toggleMarkers()
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: (fn(code, keys.ignore) >= 0) ? false
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: (keys.helpShowOnUnknownKey) ? function(){alert(code)}()
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: false;
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return false;
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}
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/************************************************************ Modes **/
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// ribbon/single view modes...
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// global: stores the scale before we went into single image mode...
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// XXX HACK
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var ORIGINAL_FIELD_SCALE = 1
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// remember the default backgrounds for modes...
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// ...this effectively makes the modes independant...
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// NOTE: null represent the default value...
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// XXX HACK
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var NORMAL_MODE_BG = null
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var SINGLE_IMAGE_MODE_BG = BACKGROUND_MODES[BACKGROUND_MODES.length-1]
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var toggleSingleImageMode = createCSSClassToggler('.viewer', 'single-image-mode',
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// pre...
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function(action){
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if(action == 'on'){
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NORMAL_MODE_BG = getBackgroundMode()
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ORIGINAL_FIELD_SCALE = getElementScale($('.field'))
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} else {
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SINGLE_IMAGE_MODE_BG = getBackgroundMode()
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}
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},
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// post...
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function(action){
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if(action == 'on'){
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fitImage()
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setBackgroundMode(SINGLE_IMAGE_MODE_BG)
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} else {
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setContainerScale(ORIGINAL_FIELD_SCALE)
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setBackgroundMode(NORMAL_MODE_BG)
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}
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clickAfterTransitionsDone()
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})
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// wide view mode toggle...
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var toggleWideView = createCSSClassToggler('.viewer', 'wide-view-mode', function(action){
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if(action == 'on'){
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ORIGINAL_FIELD_SCALE = getElementScale($('.field'))
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setContainerScale(0.1)
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} else {
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setContainerScale(ORIGINAL_FIELD_SCALE)
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}
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}, function(){})
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function getBackgroundMode(){
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var mode = null
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// find a mode to set...
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for(var i = 0; i < BACKGROUND_MODES.length; i++){
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// we found our mode...
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if( $('.' + BACKGROUND_MODES[i]).length > 0 ){
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return BACKGROUND_MODES[i]
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}
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}
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return mode
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}
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// set the background mode
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// NOTE: passing null will set the default.
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function setBackgroundMode(mode){
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var cur = BACKGROUND_MODES.indexOf(mode)
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// invalid mode...
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if( cur == -1 && mode != null ){
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return null
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}
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// set the mode...
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if(mode != null){
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$('.viewer').addClass(mode)
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}
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// remove all others...
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for(var i = 0; i < BACKGROUND_MODES.length; i++){
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if( i == cur ){
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continue
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}
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mode = BACKGROUND_MODES[i]
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$('.' + mode).removeClass(mode)
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}
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}
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// this will toggle through background theems: none -> dark -> black
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function toggleBackgroundModes(){
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var mode = getBackgroundMode()
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// default -> first
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if(mode == null){
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setBackgroundMode(BACKGROUND_MODES[0])
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// last -> default...
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} else if(mode == BACKGROUND_MODES[BACKGROUND_MODES.length-1]){
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setBackgroundMode()
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// next...
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} else {
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setBackgroundMode(BACKGROUND_MODES[BACKGROUND_MODES.indexOf(mode)+1])
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}
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}
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var toggleSingleImageModeTransitions = createCSSClassToggler('.viewer', 'no-single-image-transitions')
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var toggleControls = createCSSClassToggler('.viewer', 'hidden-controls')
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var showControls = function(){toggleControls('on')}
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var hideControls = function(){toggleControls('off')}
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var toggleTransitions = createCSSClassToggler('.viewer', 'transitions-enabled')
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var enableTransitions = function(){toggleTransitions('on')}
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var disableTransitions = function(){toggleTransitions('off')}
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/********************************************************* Movement **/
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// XXX for some odd reason these are not liner... something to do with origin?
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// XXX virtually identical, see of can be merged...
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function moveViewUp(){
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var t = parseInt($('.field').css('top'))
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$('.field').css({'top': t-(MOVE_DELTA)})
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}
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function moveViewDown(){
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var t = parseInt($('.field').css('top'))
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$('.field').css({'top': t+(MOVE_DELTA)})
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}
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function moveViewLeft(){
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var l = parseInt($('.field').css('left'))
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$('.field').css({'left': l-(MOVE_DELTA)})
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}
|
|
function moveViewRight(){
|
|
var l = parseInt($('.field').css('left'))
|
|
$('.field').css({'left': l+(MOVE_DELTA)})
|
|
}
|
|
|
|
|
|
|
|
|
|
/******************************************************* Navigation **/
|
|
|
|
// basic navigation...
|
|
function firstImage(){
|
|
$('.current.ribbon').children('.image').first().click()
|
|
}
|
|
function prevImage(){
|
|
$('.current.image').prev('.image').click()
|
|
}
|
|
function nextImage(){
|
|
$('.current.image').next('.image').click()
|
|
}
|
|
function lastImage(){
|
|
$('.current.ribbon').children('.image').last().click()
|
|
}
|
|
|
|
// XXX add skip N images back and forth handlers...
|
|
// XXX
|
|
|
|
|
|
function focusRibbon(direction){
|
|
var id = $('.current.image').attr('id')
|
|
var prev = getImageBefore(id, $('.current.ribbon')[direction]('.ribbon'))
|
|
if(prev){
|
|
var next = prev.next()
|
|
// NOTE: direction is accounted for to make the up/down shifts
|
|
// symmetrical in the general case...
|
|
if(next.length == 0 || direction == 'next'){
|
|
prev.click()
|
|
} else {
|
|
next.click()
|
|
}
|
|
} else {
|
|
$('.current.ribbon')[direction]('.ribbon').children('.image').first().click()
|
|
}
|
|
}
|
|
function focusAboveRibbon(){
|
|
focusRibbon('prev')
|
|
}
|
|
function focusBelowRibbon(){
|
|
focusRibbon('next')
|
|
}
|
|
|
|
|
|
|
|
|
|
/********************************************************** Actions **/
|
|
// basic actions...
|
|
// NOTE: below 'direction' argument is meant in the html sence,
|
|
// i.e. next/prev...
|
|
|
|
// create ribbon above/below helpers...
|
|
// XXX adding a ribbon above the current is still jumpy, need to devise
|
|
// a cleaner way to do this...
|
|
function createRibbon(direction){
|
|
if(direction == 'next'){
|
|
var insert = 'insertAfter'
|
|
} else if(direction == 'prev') {
|
|
var insert = 'insertBefore'
|
|
} else {
|
|
return false
|
|
}
|
|
|
|
// adding a new ribbon above the current effectively pushes the
|
|
// whole view down, so we need to compensate for this.
|
|
// NOTE: the problem is partly caused by clicks fiering BEFORE the
|
|
// animation is done...
|
|
$('.field').addClass('unanimated')
|
|
|
|
if(direction == 'prev'){
|
|
$('.field').css({
|
|
'margin-top': parseInt($('.field').css('margin-top')) - $('.ribbon').outerHeight()
|
|
})
|
|
}
|
|
// the actual insert...
|
|
var res = $('<div class="ribbon"></div>')[insert]('.current.ribbon')
|
|
|
|
// restore the animated state...
|
|
$('.field').removeClass('unanimated')
|
|
|
|
return res
|
|
}
|
|
|
|
|
|
|
|
// merge current and direction ribbon...
|
|
// NOTE: this will take all the elements from direction ribbon and add
|
|
// them to current
|
|
// XXX this uses jquery animation...
|
|
// XXX one way to optimise this is to add the lesser ribbon to the
|
|
// greater disregarding their actual order...
|
|
function mergeRibbons(direction){
|
|
var current_ribbon = $('.current.ribbon')
|
|
var images = $('.current.ribbon')[direction]('.ribbon').children()
|
|
for(var i=0; i < images.length; i++){
|
|
var image = $(images[i])
|
|
// get previous element after which we need to put the current...
|
|
var prev_elem = getImageBefore(image.attr('id'), current_ribbon)
|
|
// check if we need to be before the first element...
|
|
if(prev_elem == null){
|
|
image
|
|
.detach()
|
|
.insertBefore(current_ribbon.children('.image').first())
|
|
} else {
|
|
image
|
|
.detach()
|
|
.insertAfter(prev_elem)
|
|
}
|
|
}
|
|
// animate...
|
|
$('.current.ribbon')[direction]('.ribbon')
|
|
.slideUp(function(){
|
|
$(this).remove()
|
|
$('.current.image').click()
|
|
})
|
|
}
|
|
|
|
|
|
|
|
|
|
/*************************************************** Editor Actions **/
|
|
|
|
// now the actual modifiers...
|
|
function shiftImage(direction){
|
|
if($('.current.ribbon')[direction]('.ribbon').length == 0){
|
|
createRibbon(direction)
|
|
}
|
|
|
|
// get previous element after which we need to put the current...
|
|
var prev_elem = getImageBefore(
|
|
$('.current.image').attr('id'),
|
|
$('.current.ribbon')[direction]('.ribbon'))
|
|
|
|
// last image in ribbon, merge...
|
|
if($('.current.ribbon').children('.image').length == 1){
|
|
mergeRibbons(direction)
|
|
} else {
|
|
img = $('.current.image')
|
|
if(img.next('.image').length == 0){
|
|
prevImage()
|
|
} else {
|
|
nextImage()
|
|
}
|
|
// do the actual move...
|
|
if(prev_elem){
|
|
// insert element after current...
|
|
img
|
|
.detach()
|
|
.insertAfter(prev_elem)
|
|
} else {
|
|
// empty ribbon or fisrt element...
|
|
img
|
|
.detach()
|
|
.prependTo($('.current.ribbon')[direction]('.ribbon'))
|
|
}
|
|
|
|
}
|
|
$('.current.image').click()
|
|
}
|
|
|
|
|
|
|
|
function shiftImageDown(){
|
|
return shiftImage('next')
|
|
}
|
|
function shiftImageUp(){
|
|
return shiftImage('prev')
|
|
}
|
|
|
|
|
|
|
|
function flipRibbons(){
|
|
var ribbons = $('.ribbon')
|
|
// index of current ribbon, needed to adjust placement of everything...
|
|
var cur = ribbon.index($('.current.ribbon'))
|
|
|
|
// XXX would have been nice if we could do detach reverse attach or just reverse...
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/*********************************************************************/
|
|
// vim:set ts=4 sw=4 nowrap :
|