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| <!DOCTYPE html>
<html lang="fr-FR">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Drag and drop</title>
<meta name="Author" content="NoSmoking">
<meta name="DVP-discussion" content="d1859989">
<style>
html, body {
position: relative;
margin: 0 auto;
padding: 0;
max-width: 60em;
font: 1em/1.5 Verdana,sans-serif;
}
h1, h2, h3 {
color: #069;
margin: .25em 0
}
section {
display: block;
margin: 0 .5em;
}
section p,
section pre {
margin: 1em;
}
pre {
font: inherit;
border: 1px solid #ABC;
padding: .5em;
font-size: .8em;
}
code {
white-space: pre-wrap;
}
.drag-over {
background: #EEF;
}
.zone-groupe {
display: flex;
flex-wrap: wrap;
}
.zone-groupe > div {
flex: 0 0 33.33%;
}
li {
position: relative;
display: block;
margin: .25em;
padding: .5em;
border-radius: .25em;
border: 1px dotted #999;
list-style: none;
background: #EEE;
}
button {
font: inherit;
padding: .25em 1em;
cursor: pointer;
}
*[draggable=true] {
cursor: move;
-moz-user-select: none;
-khtml-user-drag: element;
}
li[draggable=true]:hover {
border-color: #333;
background: #CDE;
}
.drop-zone {
margin: 1em;
padding: 0;
min-height: 15em;
min-width: 15em;
border: 1px solid #ABC;
font-size: .8em;
}
.liste-origine {
display: flex;
flex-wrap: wrap;
min-height: auto;
}
.liste-origine li {
width: 10em;
margin: .25em;
min-width: auto;
}
.btn-close {
display: inline-block;
position: absolute;
top: 0;
right: 0;
width: 1em;
height: 1em;
margin: .125em;
padding: .125em;
border: 2px solid currentColor;
border-radius: 50%;
text-align: center;
font-weight: bold;
line-height: 1em;
color: #BBB;
transform: rotate(-45deg);
cursor: pointer;
}
.btn-close:hover {
color: #FFF;
background: #F00;
}
.liste-origine .btn-close {
display: none;
}
</style>
</head>
<body>
<main>
<header>
<h1>Drag and drop</h1>
</header>
<section>
<h2>Liste noms</h2>
<ul id="liste" class="drop-zone liste-origine">
<li>Sébastien</li>
<li>Yves</li>
<li>Vincent</li>
<li>Julien</li>
<li>Louis</li>
<li>Raphaël</li>
<li>Sylvain</li>
<li>Michel</li>
<li>Patrick</li>
<li>François</li>
<li>Alain</li>
<li>Roland</li>
<li>Bernard</li>
<li>Jean-Louis</li>
<li>Marc</li>
</ul>
<div class="zone-groupe">
<div>
<h2>Groupe 1</h2>
<ul class="drop-zone">
<li>Sébastien</li>
<li>Vincent</li>
<li>Louis</li>
</ul>
</div>
<div>
<h2>Groupe 2</h2>
<ul class="drop-zone">
<li>Michel</li>
<li>Patrick</li>
<li>François</li>
</ul>
</div>
<div>
<h2>Groupe 3</h2>
<ul class="drop-zone">
<li>Sébastien</li>
<li>Michel</li>
<li>Bernard</li>
<li>Marc</li>
</ul>
</div>
<div>
<h2>Groupe 4</h2>
<ul class="drop-zone">
<li>Alain</li>
</ul>
</div>
<div>
<h2>Groupe 5</h2>
<ul class="drop-zone">
</ul>
</div>
<div>
<h2>Groupe 6</h2>
<ul class="drop-zone">
</ul>
</div>
</div>
</section>
<section>
<h2>Résultat</h2>
<pre id="resultat"></pre>
</section>
</main>
<script>
"use strict";
function getGroupes() {
var prefixe = "groupe";
var result = {};
var oElems = document.querySelectorAll(".zone-groupe ul");
var i;
var oElem;
var j;
var tab;
for (i = 0; oElems[i]; i += 1) {
tab = [];
oElem = oElems[i].children;
for (j = 0; oElem[j]; j += 1) {
tab.push(oElem[j].dataset.num);
}
result[prefixe + (i + 1)] = tab;
}
return result;
}
function showGroupes() {
var data = getGroupes();
var oDest = document.querySelector("#resultat");
if (oDest) {
oDest.textContent = "var data = " + JSON.stringify(data, null, "\t");
}
}
function removeParent(elem) {
var oParent = elem.parentNode;
oParent.parentNode.removeChild(oParent);
showGroupes();
}
//var typeData = "text/plain"; // normalement
var typeData = "Text"; // Text pour IE
function handleDragStart(e) {
var idTemp = "drag-en-cours";
this.id = idTemp;
e.dataTransfer.setData(typeData, idTemp);
e.dataTransfer.effectAllowed = "copy";
}
function handleDragEnter(e) {
this.classList.add("drag-over");
return false;
}
function handleDragOver(e) {
e.preventDefault();
this.classList.add("drag-over");
e.dataTransfer.dropEffect = "copy";
return false;
}
function handleDragLeave(e) {
this.classList.remove("drag-over");
return false;
}
function existeDeja(dest, num) {
var i;
var nb = dest.children.length;
for (i = 0; i < nb; i += 1) {
if (num === dest.children[i].dataset.num) {
return true;
}
}
return false;
}
function handleDrop(e) {
if (e.stopPropagation) {
e.stopPropagation();
e.preventDefault();
}
var oDest = this;
var elem = document.getElementById(e.dataTransfer.getData(typeData)); // Text pour IE
elem.id = "";
// on ne repose pas dans le même conteneur
if (elem.parentNode !== oDest) {
// si retour à liste d'origine
var retour = oDest.classList.contains("liste-origine");
if (retour) {
elem.parentNode.removeChild(elem);
}
else {
var existe = existeDeja(oDest, elem.dataset.num);
if (!existe) {
// clonage élément
var clone = elem.cloneNode(true);
// ajout événement car les événements ne sont pas clonés
clone.addEventListener("dragstart", handleDragStart, false);
oDest.appendChild(clone);
}
}
}
oDest.classList.remove("drag-over");
showGroupes();
return false;
}
// initialisation des <li> drag-droppables
var htmlBtn = "<span class='btn-close' title='Supprimer' onclick='removeParent(this)'>x</span>";
var oElems = document.querySelectorAll(".drop-zone li");
var i;
var nb = oElems.length;
for (i = 0; i < nb; i += 1) {
// autorise le drag
oElems[i].setAttribute("draggable", "true");
// ajout événement pour drag
oElems[i].addEventListener("dragstart", handleDragStart, false);
// ajout d'un marqueur
oElems[i].dataset.num = oElems[i].textContent;
// méthode « bourrin » d'ajout d'un bouton de suppression
oElems[i].insertAdjacentHTML("beforeend", htmlBtn);
}
// initialisation des zones de drop
oElems = document.querySelectorAll(".drop-zone");
nb = oElems.length;
for (i = 0; i < nb; i += 1) {
oElems[i].addEventListener("dragenter", handleDragEnter, false);
oElems[i].addEventListener("dragover", handleDragOver, false);
oElems[i].addEventListener("dragleave", handleDragLeave, false);
oElems[i].addEventListener("drop", handleDrop, false);
}
showGroupes();
</script>
</body>
</html> |
drag and drop : adaptation code d'une fonction
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