2013-04-26 05:30:56 +04:00
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<html>
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<head>
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<title>ImageGrid.Viewer</title>
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<style>
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.viewer {
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position: relative;
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width: 800px;
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height: 600px;
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/*overflow: hidden;*/
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overflow: auto;
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border: solid blue 1px;
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}
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.ribbon-set {
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}
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.ribbon-set:empty:after {
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position: absolute;
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display: block;
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top: 0px;
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left: 0px;
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width: 100%;
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height: 100%;
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content: "Empty";
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text-align: center;
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}
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.ribbon {
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position: relative;
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display: block;
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height: auto;
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min-width: 0px;
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overflow: visible;
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white-space: nowrap;
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font-size: 0;
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/*
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margin-top: 20px;
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margin-bottom: 20px;
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*/
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}
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.ribbon:first-child {
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margin-top: 0px;
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}
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.ribbon:last-child {
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margin-bottom: 0px;
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}
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/* XXX do we actually need this? */
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.current.ribbon {
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}
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.image {
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position: relative;
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display: inline-block;
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vertical-align: middle;
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text-align;left;
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width: 100px;
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height: 100px;
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font-size: 12pt;
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background: black;
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box-sizing:border-box;
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border: solid gray 1px;
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color: white;
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}
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.current.image {
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background: red;
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}
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</style>
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<script src="jquery.js"></script>
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<script>
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/*
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Viewer Generation III
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Split the API into the following sections:
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- main control actions
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do main domain tasks like image and ribbon manipulation.
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- serialization and deserialization
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load and save data
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- UI
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basic align, animation and modes
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*/
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function createImage(n){
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if(n == null){
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if(window._n == null){
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window._n = 0
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}
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n = _n
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_n += 1
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}
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return $('<div order="'+n+'" class="image"/>')
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}
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function createRibbon(){
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return $('<div class="ribbon"/>')
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}
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// NOTE: if this returns null, it means that the element is smallest in
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// target ribbon -- first position.
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function getImageBefore(image, ribbon){
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image = $(image)
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var images = $(ribbon).find('.image')
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var order = image.attr('order')
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var prev = null
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images.each(function(){
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if(order < $(this).attr('order')){
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return false
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}
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prev = this
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})
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return prev
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}
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function shiftTo(image, ribbon){
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var target = getImageBefore(image, ribbon)
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var cur_ribbon = image.closest('.ribbon')
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// insert before the first image if nothing is before the target...
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if(target == null){
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image.insertBefore($(ribbon).find('.image').first())
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} else {
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image.insertAfter(target)
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}
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// if removing last image out of a ribbon, remove the ribbon....
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if(cur_ribbon.find('.image').length == 0){
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cur_ribbon.remove()
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}
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return image
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}
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function shiftImage(direction, image, force_create_ribbon){
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if(image == null){
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// XXX need to make this context specific...
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image = $('.current.image')
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} else {
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image = $(image)
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}
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var ribbon = image.closest('.ribbon')[direction]('.ribbon')
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// need to create a new ribbon...
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if(ribbon.length == 0 || force_create_ribbon == true){
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ribbon = createRibbon()['insert' + (direction == 'prev'
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? 'Before'
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: 'After')](image.closest('.ribbon'))
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ribbon.append(image)
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} else {
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shiftTo(image, ribbon)
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}
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return image
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}
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// short-hand methods...
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function shiftImageUp(image){
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return shiftImage('prev', image)
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}
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function shiftImageDown(image){
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return shiftImage('next', image)
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}
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function shiftImageUpNewRibbon(image){
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return shiftImage('prev', image, true)
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}
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function shiftImageDownNewRibbon(image){
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return shiftImage('next', image, true)
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}
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// TODO manual image ordering (shiftLeft/shiftRight functions)
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// XXX
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2013-04-26 05:33:38 +04:00
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function focusImage(image){
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image.closest('.viewer').find('.current.image').removeClass('current')
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return image.addClass('current')
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}
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2013-04-26 05:30:56 +04:00
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// NOTE: this is on purpose done relative...
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function clickHandler(evt){
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var img = $(evt.target).closest('.image')
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2013-04-26 05:33:38 +04:00
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focusImage(img)
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2013-04-26 05:30:56 +04:00
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}
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// setup...
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$(function(){
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// populate the viewer...
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var r = createRibbon()
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var images = []
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for(var i=0; i < 40; i++){
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images.push(createImage().text(i)[0])
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}
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r.append($(images))
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var rr = r.clone()
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var rrr = r.clone()
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$('.ribbon-set')
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.append(r)
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.append(rr)
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.append(rrr)
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// NOTE: this is global so as to not to add any extra complexity to
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// the internal workings...
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$('.viewer').click(clickHandler)
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})
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</script>
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</head>
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<body>
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<!-- This is the basic viewer structure...
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Unpopulated
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NOTE: there can be only .ribbon-set element.
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<div class="viewer">
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<div class="ribbon-set"></div>
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</div>
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Populated
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<div class="viewer">
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<div class="ribbon-set">
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<div class="ribbon">
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<div class="image"></div>
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<div class="image"></div>
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</div>
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<div class="ribbon">
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<div class="image"></div>
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<div class="current image"></div>
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<div class="image"></div>
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<div class="image"></div>
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</div>
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</div>
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</div>
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-->
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<div class="viewer">
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<div class="ribbon-set"></div>
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</div>
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<!-- vim:set ts=4 sw=4 spell : -->
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</body>
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</html>
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