2013-04-12 17:24:06 +04:00
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<html>
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<script src="jquery.js"></script>
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<script>
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function focus(elem){
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$('.current.square').removeClass('current')
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2013-04-16 16:36:01 +04:00
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$(elem)
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.closest('.square')
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.addClass('current')
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.trigger('focus')
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2013-04-12 17:24:06 +04:00
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}
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2013-04-26 05:31:26 +04:00
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2013-04-12 17:24:06 +04:00
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function clickHandler(){
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focus(this)
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}
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2013-04-16 15:45:49 +04:00
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2013-04-16 15:56:22 +04:00
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/* Focus next/prev container element
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*
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* This will shift focus within a container.
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*
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* If we reach the start/end of the container, we will "warp" around it
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* and focus an element from the other end.
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*
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*/
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2013-04-16 16:36:01 +04:00
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// XXX make this customizable (selector-wise)...
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function shiftFocus(n){
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2013-04-12 17:24:06 +04:00
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var cur = $('.current.square')
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2013-04-16 16:36:01 +04:00
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if(n > 0){
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direction = 'next'
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} else if(n < 0){
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direction = 'prev'
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} else {
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2013-04-16 15:45:49 +04:00
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return cur
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}
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2013-04-16 16:36:01 +04:00
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// trigger the event...
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cur.closest('.container')
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.trigger('shiftfocus', n)
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2013-04-26 05:31:26 +04:00
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// XXX will adding a singular [direction] branch make things faster
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// for n = +/-1 ???
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2013-04-16 16:36:01 +04:00
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var dir = cur[direction+'All']('.square')
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2013-04-26 05:31:26 +04:00
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2013-04-16 15:56:22 +04:00
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// see if we need to warp arund...
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2013-04-16 16:36:01 +04:00
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if(dir.length < Math.abs(n)){
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2013-04-16 15:45:49 +04:00
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var sq = cur.closest('.container').children('.square')
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var i = sq.index(cur)
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2013-04-16 16:36:01 +04:00
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return focus($(sq[ n > 0
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2013-04-16 15:45:49 +04:00
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? (i + n) % sq.length
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2013-04-16 16:36:01 +04:00
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: sq.length - (Math.abs(i + n) % sq.length) ]))
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2013-04-12 17:24:06 +04:00
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}
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2013-04-26 05:31:26 +04:00
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2013-04-12 17:24:06 +04:00
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// shift the current element...
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2013-04-16 16:36:01 +04:00
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return focus($(dir[Math.abs(n)-1]))
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2013-04-12 17:24:06 +04:00
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}
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2013-04-16 15:45:49 +04:00
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2013-04-12 17:24:06 +04:00
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// these will roll the container...
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2013-04-26 05:31:26 +04:00
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// XXX make this container context-aware...
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2013-04-16 16:36:01 +04:00
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function rollContainer(n){
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2013-04-26 05:31:26 +04:00
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var sq = $('.current.square')
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.closest('.container')
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.children('.square')
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2013-04-16 16:36:01 +04:00
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// right...
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if(n > 0){
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2013-04-26 05:31:26 +04:00
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return $(sq.splice(0, n)).appendTo($('.container'))
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2013-04-16 16:36:01 +04:00
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// left...
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} else if(n < 0){
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var l = sq.length
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return $(sq.splice(l+n, l)).prependTo($('.container'))
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// 0...
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} else {
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return
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2013-04-16 15:45:49 +04:00
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}
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2013-04-12 17:24:06 +04:00
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}
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2013-04-16 16:36:01 +04:00
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2013-04-26 05:31:26 +04:00
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// misc demo stuff...
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var UPDATE_ELEMENT_TEXT = true
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2013-04-16 16:36:01 +04:00
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function toggleNumberUpdate(){
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if(UPDATE_ELEMENT_TEXT){
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UPDATE_ELEMENT_TEXT = false
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} else {
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UPDATE_ELEMENT_TEXT = true
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2013-04-16 15:45:49 +04:00
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}
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2013-04-12 17:24:06 +04:00
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}
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2013-04-26 05:31:26 +04:00
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// init things...
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2013-04-12 17:24:06 +04:00
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$(function(){
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$('.container')
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2013-04-16 16:36:01 +04:00
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// NOTE: this event will get completed BEFORE the element is focused.
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.on('shiftfocus', function(evt, n){
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2013-04-26 05:31:26 +04:00
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// update squares -- numbers...
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if(UPDATE_ELEMENT_TEXT){
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var sq = $(this).children('.square')
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2013-04-16 16:36:01 +04:00
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if(n > 0){
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2013-04-26 05:31:26 +04:00
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var s = sq.last().text()*1 + 1
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2013-04-16 16:36:01 +04:00
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} else if(n < 0){
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2013-04-26 05:31:26 +04:00
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var s = sq.first().text()*1 + n
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2013-04-16 16:36:01 +04:00
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} else {
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return
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}
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rollContainer(n).each(function(i, e){
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$(this).text(i + s)
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})
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2013-04-26 05:31:26 +04:00
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// roll as-is...
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2013-04-16 16:36:01 +04:00
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} else {
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rollContainer(n)
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}
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})
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2013-04-12 17:24:06 +04:00
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$('.square')
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.click(clickHandler)
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})
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</script>
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<style>
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.container {
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position: relative;
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display: inline-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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background: gray;
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padding: 10px;
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}
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.square {
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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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background: silver;
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font-size: 12pt;
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}
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.current.square {
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background: red;
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}
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</style>
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<body>
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2013-04-16 16:36:01 +04:00
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<button onclick="shiftFocus(-5)"><<</button>
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<button onclick="shiftFocus(-1)"><</button>
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<button onclick="shiftFocus(1)">></button>
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<button onclick="shiftFocus(5)">>></button>
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<button onclick="toggleNumberUpdate()">toggle square number update</button>
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2013-04-12 17:24:06 +04:00
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2013-04-26 05:31:26 +04:00
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2013-04-12 17:24:06 +04:00
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<div class="meta-container">
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<div class="container">
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<div class="square">1</div>
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<div class="square">2</div>
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<div class="square current">3</div>
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<div class="square">4</div>
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<div class="square">5</div>
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<div class="square">6</div>
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<div class="square">7</div>
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</div>
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</div>
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</body>
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<!-- vim:set ts=4 sw=4 : -->
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</html>
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