Created
June 3, 2015 07:50
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Binary entry HTML+CSS+JavaScript
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <title>Binary Entry JavaScript</title> | |
| <style type="text/css"> | |
| .box { | |
| border: 1px solid black; | |
| height: 32px; | |
| width: 32px; | |
| font-size: 24px; | |
| font-family: monospace; | |
| text-align: center; | |
| display: inline-block; | |
| } | |
| </style> | |
| </head> | |
| <body> | |
| <h1>Stuff goes here.</h1> | |
| <div class="box"></div> | |
| <div class="box"></div> | |
| <div class="box"></div> | |
| <div class="box"></div> | |
| | |
| <div class="box"></div> | |
| <div class="box"></div> | |
| <div class="box"></div> | |
| <div class="box"></div> | |
| <script type="application/javascript"> | |
| function advance(obj) { | |
| var idVal = obj.id.substr(3) * 1.0; | |
| var prior = document.getElementById("bit" + (idVal + 1)); | |
| if(prior == null) { | |
| prior = document.getElementById("bit0"); | |
| } | |
| setTimeout(function() { | |
| prior.focus(); | |
| var selection = window.getSelection(); | |
| var range = document.createRange(); | |
| range.selectNodeContents(prior); | |
| selection.removeAllRanges(); | |
| selection.addRange(range); | |
| }, 100); | |
| } | |
| var boxes = document.getElementsByClassName('box'); | |
| for(var i = 0; i < boxes.length; i++) { | |
| var box = boxes[i]; | |
| box.id = "bit"+((boxes.length - 1) - i); | |
| box.setAttribute("contentEditable", true); | |
| box.onkeydown = function(event) { | |
| if(event.metaKey && event.which == 82) return; | |
| if([8, 9, 46, 37, 39].indexOf(event.which) == -1) { | |
| var empty = (this.innerText.length == 0); | |
| var selection = window.getSelection(); | |
| var all_selected = (selection != null | |
| && selection.baseNode.parentElement.id == this.id | |
| && selection.rangeCount == this.innerText.length); | |
| result = ((empty || all_selected) && (event.which == 48 || event.which == 49)); | |
| if(result) { | |
| advance(this); | |
| } else { | |
| event.preventDefault(); | |
| } | |
| } | |
| }; | |
| } | |
| document.getElementById("bit0").focus(); | |
| </script> | |
| </body> | |
| </html> |
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