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June 27, 2016 13:53
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listen to mouse move in window object instead of mouseover in list elements to overcome mouseout events from firing, calculate element index when knowing height
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| <!DOCTYPE html> | |
| <html lang="en"> | |
| <head> | |
| <meta charset="UTF-8"> | |
| <title>Title</title> | |
| <style> | |
| body { | |
| margin: 0 auto; | |
| text-align: center; | |
| } | |
| #display { | |
| display: block; | |
| position: absolute; | |
| top: 0; | |
| right: 0; | |
| width: 400px; | |
| height: 100px; | |
| border: solid thin lightgray; | |
| } | |
| #display p { | |
| display: block; | |
| border: solid thin darkred; | |
| color: darkred; | |
| } | |
| .container { | |
| width: 100%; | |
| height: 100%; | |
| display: block; | |
| } | |
| #drag-if { | |
| display: inline-block; | |
| width:300px; | |
| height: 275px; | |
| border: solid thin lightgray; | |
| border-top: solid 100px black; | |
| } | |
| ul { | |
| list-style: none; | |
| } | |
| .box, #ph { | |
| display: inline-flex; | |
| justify-content: space-around; | |
| height: 35px; | |
| width: 250px; | |
| border: solid thin lightgreen; | |
| margin: 5px 0; | |
| } | |
| .box a { | |
| display: -webkit-box; | |
| } | |
| #ph { | |
| border: solid thin red!important; | |
| width: 125px; | |
| border-radius: 3px; | |
| background-color: darkcyan; | |
| margin-left: 62px; | |
| } | |
| </style> | |
| <script src="script.js" type="text/javascript"></script> | |
| </head> | |
| <!--onload="init();"--> | |
| <body onload="init();"> | |
| <div class="container"> | |
| <div id="drag-if"> | |
| <ul id="list"> | |
| <li id="ph"></li> | |
| <li class="box"> | |
| <a href="#">link <header>header </header></a> | |
| <span>span <label>label </label></span> | |
| </li> | |
| <li class="box"> | |
| <a href="#">link <header>header </header></a> | |
| <span>span <label>label </label></span> | |
| </li> | |
| <li class="box"> | |
| <a href="#">link <header>header </header></a> | |
| <span>span <label>label </label></span> | |
| </li> | |
| <li class="box"> | |
| <a href="#">link <header>header </header></a> | |
| <span>span <label>label </label></span> | |
| </li> | |
| <li class="box"> | |
| <a href="#">link <header>header </header></a> | |
| <span>span <label>label </label></span> | |
| </li> | |
| </ul> | |
| </div> | |
| </div> | |
| </body> | |
| </html> |
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| function init() { | |
| var boxes = document.getElementsByClassName('box'); | |
| var ul = document.getElementById('list'); | |
| var phe = document.getElementById('ph'); | |
| var drag = document.getElementById('drag-if'); | |
| var bounds = ul.getBoundingClientRect(); | |
| var ph = phe.parentNode.removeChild(phe); | |
| var min, height; | |
| min = boxes[0].getBoundingClientRect().top; | |
| height = boxes[0].getBoundingClientRect().height; | |
| function isInside(node, target) { | |
| for (; node != null; node = node.parentNode) | |
| if (node == target) { | |
| return true; | |
| } | |
| } | |
| function getIndexInRange(mousePosition) { | |
| return Math.round((mousePosition - min) / height); | |
| } | |
| window.addEventListener('mousemove', function () { | |
| if(isInside(event.target, list)) { | |
| ul.insertBefore(ph, boxes[getIndexInRange(event.pageY) - 1]); | |
| } | |
| else { | |
| setTimeout(function () { | |
| if (ul.contains(ph)) { | |
| ul.removeChild(ph); | |
| } | |
| }, 500); | |
| } | |
| }); | |
| } |
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