ImageGrid/ui/index.html

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<html>
<head>
<title>ImageGrid.Viewer</title>
<style>
.viewer {
position: relative;
width: 800px;
height: 600px;
overflow: hidden;
border: solid blue 1px;
}
.ribbon-set {
position: absolute;
}
.ribbon-set:empty:after {
display: block;
top: 0px;
left: 0px;
width: 100%;
height: 100%;
content: "Empty";
text-align: center;
}
.ribbon {
position: relative;
display: block;
height: auto;
min-width: 0px;
overflow: visible;
white-space: nowrap;
font-size: 0;
margin-top: 20px;
margin-bottom: 20px;
}
.ribbon:empty {
display: none;
}
.ribbon:first-child {
margin-top: 0px;
}
.ribbon:last-child {
margin-bottom: 0px;
}
.image {
position: relative;
display: inline-block;
vertical-align: middle;
text-align;left;
width: 300px;
height: 300px;
font-size: 12pt;
overflow: hidden;
background: black;
box-sizing: border-box;
border: solid gray 1px;
color: white;
}
.current.image {
background: red;
}
/* dot mark... */
.marked.image:after {
display: block;
position: absolute;
content: "";
font-size: 0pt;
border: none;
width: 15px;
height: 15px;
bottom: 5px;
right: 5px;
border-radius: 50%;
background: blue;
}
/* corner mark... (a-la bookmarks in PortableMag) */
/*
.marked.image:after {
display: block;
position: absolute;
content: "";
font-size: 0pt;
border: none;
width: 30px;
height: 30px;
top: -15px;
right: -15px;
background: blue;
-webkit-transform: rotate(45deg);
-moz-transform: rotate(45deg);
-o-transform: rotate(45deg);
-ms-transform: rotate(45deg);
transform: rotate(45deg);
}
*/
.marked-only.viewer:after {
display: block;
position: absolute;
content: "Showing marked images only";
font-size: 14pt;
border: none;
color: blue;
width: auto;
height: auto;
top: 10px;
right: 10px;
}
.marked-only .image:not(.marked) {
display: none;
}
.marked-only .marked.image:after {
display: none;
}
.up-indicator,
.down-indicator {
display: block;
position: absolute;
content: "";
top: 0px;
left: 50%;
height: 50px;
width: 100px;
margin-left: -50px;
overflow: hidden;
cursor: hand;
}
.up-indicator:after,
.down-indicator:after {
display: inline-block;
position: absolute;
content: "";
width: 50px;
height: 50px;
bottom: -25px;
left: 25px;
background: yellow;
-webkit-transform: rotate(45deg);
-moz-transform: rotate(45deg);
-o-transform: rotate(45deg);
-ms-transform: rotate(45deg);
transform: rotate(45deg);
}
.down-indicator {
top: auto;
bottom: 0px;
}
.down-indicator:after {
top: -25px;
bottom: auto;
}
/* default state */
.up-indicator,
.down-indicator {
display: none
}
</style>
<script src="jquery.js"></script>
<script src="lib/jli.js"></script>
<script src="lib/keyboard.js"></script>
<script>
/*
Viewer Generation III
Split the API into the following sections:
- main control actions
do main domain tasks like image and ribbon manipulation.
- serialization and deserialization
load and save data
- UI
basic align, animation and modes
TODO group all actions into an object, referencing the viewer...
...this will make this reusable multiple times.
*/
function flashIndicator(direction){
$(direction == 'prev' ? '.up-indicator' : '.down-indicator').fadeIn(200).fadeOut(200)
}
var toggleMarkedOnlyView = createCSSClassToggler('.viewer', 'marked-only',
function(){
var cur = $('.current.image')
// current is marked...
if(cur.hasClass('marked')){
centerImage(null, 'css')
return
}
// there is a marked image in this ribbon...
var target = getImageBefore(cur, null, true)
if(target.length > 0){
centerImage(focusImage(target), 'css')
return
}
// get marked image from other ribbons...
prevRibbon()
if($('.current.image').hasClass('marked')){
return
}
nextRibbon()
})
// XXX add ability to take all marked images and open them in a separate view...
var toggleImageMark = createCSSClassToggler('.current.image', 'marked')
// mode can be:
// - 'ribbon'
// - 'all'
function removeImageMarks(mode){
// remove marks from current ribbon (default)...
if(mode == 'ribbon' || mode == null){
return $('.current.image')
.closest('.ribbon')
.find('.marked')
.removeClass('marked')
// remove all marks...
} else if(mode == 'all'){
return $('.marked')
.removeClass('marked')
}
}
function markAll(mode){
// remove marks from current ribbon (default)...
if(mode == 'ribbon' || mode == null){
return $('.current.image')
.closest('.ribbon')
.find('.image:not(.marked)')
.addClass('marked')
// remove all marks...
} else if(mode == 'all'){
return $('.image:not(.marked)').addClass('marked')
}
}
function invertImageMarks(){
return $('.current.image')
.closest('.ribbon')
.find('.image')
.toggleClass('marked')
}
// this will toggle marks in the current continuous section of marked
// or unmarked images...
function toggleImageMarkBlock(image){
if(image == null){
image = $('.current.image')
}
// we need to invert this...
var state = toggleImageMark()
var _convert = function(){
if(toggleImageMark(this, '?') == state){
return false
}
toggleImageMark(this, state)
}
image.nextAll('.image').each(_convert)
image.prevAll('.image').each(_convert)
return state
}
// XXX should we use the createCSSClassToggler for this?
// XXX revise: does extra stuff...
function toggleImageProportions(mode){
var image = $('.image')
var h = image.outerHeight(true)
var w = image.outerWidth(true)
if(mode == '?'){
return h != w ? 'viewer' : 'square'
// square...
} else if(h != w || mode == 'square'){
var size = Math.min(w, h)
image.css({
width: size,
height: size
})
centerImage(null, 'css')
return 'square'
// viewer size...
} else {
var viewer = $('.viewer')
var W = viewer.innerWidth()
var H = viewer.innerHeight()
if(W > H){
image.css('width', W * h/H)
} else {
image.css('height', H * w/W)
}
centerImage(null, 'css')
return 'viewer'
}
}
// NOTE: to avoid state sync problems this should clone an image if
// one is available...
function createImage(n){
if(n == null){
if(window._n == null){
window._n = 0
}
n = _n
_n += 1
}
var img = $('.image')
if(img.length > 0){
return img.first().clone()
.attr({
'order': n,
// need to strip extra classes...
'class': 'image'
})
} else {
return $('<div order="'+n+'" class="image"/>')
}
}
// This will create a set of new images, reusing a list of existing
// elements if given.
// XXX do we need this???
function createImages(need, have){
have = have == null ? [] : have
// we have enough elements in the cache...
if(have.length >= need){
return $(have.splice(0, need))
// need to create additional elements...
} else {
return $(have.toArray().concat(new Array(need - have.length)))
.map(function(i, elem){
if(elem != null){
return elem
}
return createImage()[0]
})
}
}
function createRibbon(){
return $('<div class="ribbon"/>')
}
// NOTE: if this returns null, it means that the element is smallest in
// target ribbon -- first position.
function getImageBefore(image, ribbon, visible_only){
image = $(image)
if(ribbon == null){
ribbon = image.closest('.ribbon')
}
// pre marked-only mode...
//var images = $(ribbon).find('.image')
if(visible_only){
var images = $(ribbon).find('.image').filter(':visible')
} else {
var images = $(ribbon).find('.image')
}
var order = image.attr('order')
var prev = null
images.each(function(){
if(order < $(this).attr('order')){
return false
}
prev = this
})
return $(prev)
}
function shiftTo(image, ribbon){
var target = getImageBefore(image, ribbon)
var cur_ribbon = image.closest('.ribbon')
// insert before the first image if nothing is before the target...
if(target.length == 0){
image.prependTo($(ribbon))
} else {
image.insertAfter(target)
}
// if removing last image out of a ribbon, remove the ribbon....
if(cur_ribbon.find('.image').length == 0){
cur_ribbon.remove()
}
return image
}
function shiftImage(direction, image, force_create_ribbon){
if(image == null){
// XXX need to make this context specific...
image = $('.current.image')
} else {
image = $(image)
}
var old_ribbon = image.closest('.ribbon')
var ribbon = old_ribbon[direction]('.ribbon')
// need to create a new ribbon...
if(ribbon.length == 0 || force_create_ribbon == true){
ribbon = createRibbon()['insert' + (direction == 'prev'
? 'Before'
: 'After')](old_ribbon)
shiftTo(image, ribbon)
} else {
shiftTo(image, ribbon)
}
return image
}
function focusImage(image){
image.closest('.viewer').find('.current.image').removeClass('current')
return image.addClass('current')
}
// Alignment API...
// ...tried to make this as brain-dead-stupidly-simple as possible...
function relativeVisualPosition(outer, inner){
outer = $(outer).offset()
inner = $(inner).offset()
return {
top: inner.top - outer.top,
left: inner.left - outer.left
}
}
// This appears to work well with scaling...
// XXX make this more configurable...
// XXX this only works for square images...
function centerImage(image, mode){
if(mode == null){
//mode = 'css'
mode = 'animate'
}
if(image == null || image.length == 0){
image = $('.current.image')
}
var viewer = $('.viewer')
// XXX should these be "inner"???
var W = viewer.innerWidth()
var H = viewer.innerHeight()
var ribbons = $('.ribbon-set')
var scale = getElementScale(ribbons)
// NOTE: these are scalable, this needs to get normalized...
var w = image.outerWidth()*scale
var h = image.outerHeight()*scale
var pos = relativeVisualPosition(viewer, image)
// zero out top/left if set to anything other than a specific number...
var t = parseFloat(ribbons.css('top'))
t = t ? t : 0
var l = parseFloat(ribbons.css('left'))
l = l ? l : 0
// do the actual work...
return ribbons[mode]({
'top': t - pos.top + (H - h)/2,
'left': l - pos.left + (W - w)/2
})
}
/**********************************************************************
* Infinite ribbon machinery
*/
// XXX need mechanics to populate the images or to connect such
// functionality...
// ...this is to be done in the loader...
// NOTE: negative left or right will contract the ribbon...
function extendRibbon(left, right, ribbon){
ribbon = ribbon == null ?
$('.current.image').closest('.ribbon')
: $(ribbon)
left = left == null ? 0 : left
right = right == null ? 0 : right
var images = ribbon.children('.image')
var removed = []
var res = {
left: [],
right: []
}
// truncate...
// NOTE: we save the detached elements to reuse them on extending,
// if needed...
if(left < 0){
removed = $(images.splice(0, -left)).detach()
}
if(right < 0){
var l = images.length
removed = $(images.splice(l+right, l)).detach()
}
// extend...
if (left > 0){
res.left = createImages(left, removed).prependTo(ribbon)
}
if (right > 0){
res.right = createImages(right, removed).appendTo(ribbon)
}
return res
}
// Roll the ribbon n positions to the left.
//
// NOTE: if n is negative the ribbon will be rolled right.
// NOTE: rollRibbon(N, R) is equivalent to extendRibbon(-N, N, R)
// NOTE: this will return a single list of relocated elements...
function rollRibbon(n, ribbon){
var res = extendRibbon(-n, n, ribbon)
return n > 0 ? res.right : res.left
}
/**********************************************************************
* User actions
*/
// basic navigation actions...
function nextImage(){
return centerImage(
focusImage(
// pre marked-only mode...
//$('.current.image').next('.image')))
$('.current.image').next('.image:visible')))
}
function prevImage(){
return centerImage(
focusImage(
// pre marked-only mode...
//$('.current.image').prev('.image')))
$('.current.image').prev('.image:visible')))
}
function firstImage(){
return centerImage(
focusImage(
// pre marked-only mode...
//$('.current.image').closest('.ribbon').find('.image').first()))
$('.current.image').closest('.ribbon').find('.image').filter(':visible').first()))
}
function lastImage(){
return centerImage(
focusImage(
// pre marked-only mode...
//$('.current.image').closest('.ribbon').find('.image').last()))
$('.current.image').closest('.ribbon').find('.image').filter(':visible').last()))
}
function nextMarkedImage(){
return centerImage(
focusImage(
// pre marked-only mode...
//$('.current.image').next('.marked.image')))
$('.current.image').next('.marked.image:visible')))
}
function prevMarkedImage(){
return centerImage(
focusImage(
// pre marked-only mode...
//$('.current.image').prev('.marked.image')))
$('.current.image').prev('.marked.image:visible')))
}
// NOTE: if moving is 'next' these will chose the image after the current's order.
// NOTE: if an image with the same order is found, moving argument has no effect.
// XXX get move direction...
function prevRibbon(moving){
var cur = $('.current.image')
// pre marked-only mode...
//var target = getImageBefore(cur, cur.closest('.ribbon').prev('.ribbon'))
var target = getImageBefore(cur, cur.closest('.ribbon').prev('.ribbon:visible'), true)
if(moving == 'next' && cur.attr('order') != target.attr('order')){
var next = target.next('.image')
target = next.length > 0 ? next : target
}
return centerImage(focusImage(target))
}
// XXX get move direction...
function nextRibbon(moving){
var cur = $('.current.image')
// pre marked-only mode...
//var target = getImageBefore(cur, cur.closest('.ribbon').next('.ribbon'))
var target = getImageBefore(cur, cur.closest('.ribbon').next('.ribbon:visible'), true)
if(moving == 'next' && cur.attr('order') != target.attr('order')){
var next = target.next('.image')
target = next.length > 0 ? next : target
}
return centerImage(focusImage(target))
}
// XXX get move direction...
function _shiftImageTo(image, direction, moving, force_create_ribbon){
if(image == null){
image = $('.current.image')
}
// account move for direction...
// XXX get the value from some place more logical than the argument...
var a = moving == 'prev' ? 'prev' : 'next'
var b = moving == 'prev' ? 'next' : 'prev'
var target = image[a]('.image')
target = target.length == 0 ? image[b]() : target
// XXX should this be in here or coupled later via an event???
flashIndicator(direction)
shiftImage(direction, image, force_create_ribbon)
// XXX does this need to be animated???
return centerImage(focusImage(target), 'css')
}
function shiftImageUp(image){
return _shiftImageTo(image, 'prev')
}
function shiftImageDown(image){
return _shiftImageTo(image, 'next')
}
function shiftImageUpNewRibbon(image){
return _shiftImageTo(image, 'prev', true)
}
function shiftImageDownNewRibbon(image){
return _shiftImageTo(image, 'prev', false)
}
// TODO manual image ordering (shiftLeft/shiftRight functions)
// XXX
function fitNImages(n){
var image = $('.current.image')
var size = image.outerHeight(true)
var viewer = $('.viewer')
var W = viewer.innerWidth()
var H = viewer.innerHeight()
var scale = Math.min(W / (size * n), H / size)
// XXX if animating, the next two likes must be animated together...
setElementScale($('.ribbon-set'), scale)
centerImage(image, 'css')
}
/**********************************************************************
* Event handlers...
*/
// NOTE: this is on purpose done relative...
function clickHandler(evt){
var img = $(evt.target).closest('.image')
centerImage(
focusImage(img))
}
// setup...
$(function(){
// populate the viewer...
var r = createRibbon()
var images = []
for(var i=0; i < 40; i++){
images.push(createImage().text(i)[0])
}
r.append($(images))
var rr = r.clone()
var rrr = r.clone()
$('.ribbon-set')
.append(r)
.append(rr)
.append(rrr)
// NOTE: this is global so as to not to add any extra complexity to
// the internal workings...
$('.viewer').click(clickHandler)
})
</script>
</head>
<body>
<!-- This is the basic viewer structure...
Unpopulated
NOTE: there can be only .ribbon-set element.
<div class="viewer">
<div class="ribbon-set"></div>
</div>
Populated
<div class="viewer">
<div class="ribbon-set">
<div class="ribbon">
<div class="image"></div>
<div class="image"></div>
</div>
<div class="ribbon">
<div class="image"></div>
<div class="current image"></div>
<div class="image"></div>
<div class="image"></div>
</div>
</div>
</div>
-->
<div class="viewer">
<div class="ribbon-set"></div>
<!-- XXX should these be here??? -->
<div class="up-indicator"></div>
<div class="down-indicator"></div>
</div>
<!-- vim:set ts=4 sw=4 spell : -->
</body>
</html>