I am having an issue with drag and drop.
My issue is that when one element is dropped into the dropzone it will sometimes be inserted into another element and not the dropzone div.
jsFiddle: /
In the example you can see I have made the tables very large so that it would be very easy to see this. When one table is dropped on top of another table, it does not go into the drop zone with the other elements, but gets inserted inside of another table.
I had a couple of ideas, but I have no idea if they would work. One was if somehow a large div could be inserted over the dropzones to ensure that the elements are always dropped into it. I would see this as almost a transparent layer that catches the elements then places them in the drop zone.
My other idea was to try and get all of the data from the div, put it all into a string, and try to parse this and then replace all the data back into the dropzone.
Also as you will notice, sorting works but only seems to in Firefox, not Safari. This is not my most pressing concern, but if you did happen to see a fix that would be great!(sorting only works on the upper dropzone) I do not want to use jQuery.
Code:
<!DOCTYPE html>
<html lang="en">
<head>
<title>Basic drag and drop example</title>
<style>
@CHARSET "UTF-8";
table.draggable-word {
background-color: red;
padding: 0px;
border: 1px solid green;
-webkit-touch-callout: none;
-webkit-user-select: none;
-khtml-user-select: none;
-moz-user-select: none;
-ms-user-select: none;
user-select: none;
border-collapse: collapse;
border-spacing: 0;
padding: 0;
margin: 0;
line-height: 1;
width: 100%;
height:50px;
}
.drop-div {
width: 150px;
height: 150px;
border: 3px solid #224163;
background-color: #AABACC;
margin-top: 15px;
text-align: center;
overflow: auto;
}
[draggable=true] {
cursor: default;
margin-top: 0px;
margin-bottom: 0px;
margin-top: 0px;
}
table {
border-color: #600;
border-width: 0 0 1px 1px;
border-style: solid;
}
</style>
<script>
var user ="";
var multiples = false;
var data;
function dragStartHandler(event,id) {
event.dataTransfer.setData('Object', event.target.id);
user = id;
multiples = true;
data = event.dataTransfer.getData('Object');
//multipleDrag(data,"false");
}
function dropHandler(event) {
preventDefaults(event);
if (!event.target) {
alert('we');
event.target = event.srcElement
}
data = event.dataTransfer.getData('Object');
event.target.appendChild(document.getElementById(data));
document.getElementById(data).selectedIndex = -1;
//alert(user);
}
function dragOverHandler(event) {
preventDefaults(event);
}
function preventDefaults(event) {
if (event.preventDefault) {
event.preventDefault();
}
try {
event.returnValue = false;
}
catch (exception) {}
}
function dragend(event) {
// multipleDrag(data,"true");
}
function multipleDrag(data,state){
document.getElementById(data).setAttribute("draggable", state);
}
function sort(uList)
{
var listItem = document.getElementById(uList).getElementsByTagName('td');
var listLength = listItem.length;
var list = [];
for(var i=0; i<listItem.length; i++){
list[i] = listItem[i].id.substring(1,listItem[i].id.length);
list.sort(function(a,b) {return parseInt(a) > parseInt(b)})
}
for(var i=0; i<listLength; i++){
listItem[i].firstChild.nodeValue = list[i];
}
}
</script>
</head>
<body>
<div class="drop-div"
ondragover="dragOverHandler(event);"
ondrop="dropHandler(event)"
id="drop-div1" ondragend="sort('drop-div1')"></div>
<div class="drop-div"
ondragover="dragOverHandler(event);"
ondrop="dropHandler(event)"
id="drop-div2">
<table draggable="true"
ondragstart="dragStartHandler(event,'3');"
class="draggable-word"id="d3" ondragend="dragend(event);"
><tr><td id="d3">3</td></tr></table>
<table draggable="true"
ondragstart="dragStartHandler(event,'4');"
class="draggable-word"
id="d4" ondragend="dragend(event);"><tr><td id="d4">4</td></tr></table>
<table draggable="true"
ondragstart="dragStartHandler(event,'4');"
class="draggable-word"
id="d5" ondragend="dragend(event);"><tr><td id="d5">5</td></tr></table>
<table draggable="true"
ondragstart="dragStartHandler(event,'4');"
class="draggable-word"
id="d6" ondragend="dragend(event);"><tr><td id="d6">6</td></tr></table>
<table draggable="true"
ondragstart="dragStartHandler(event,'4');"
class="draggable-word"
id="d7" ondragend="dragend(event);"><tr><td id="d7" >7</td></tr></table>
<table draggable="true"
ondragstart="dragStartHandler(event,'4');"
class="draggable-word"
id="d8" ondragend="dragend(event);"><tr><td id="d8" >8</td></tr></table>
<table draggable="true"
ondragstart="dragStartHandler(event,'4');"
class="draggable-word"
id="d9" ondragend="dragend(event);"><tr><td id="d9">9</td></tr></table>
<table draggable="true"
ondragstart="dragStartHandler(event,'4');"
class="draggable-word"
id="d10" ondragend="dragend(event);"><tr><td id="d10">10</td></tr></table>
<table draggable="true"
ondragstart="dragStartHandler(event,'4');"
class="draggable-word"
id="d11" ondragend="dragend(event);"><tr><td id="d11">11</td></tr></table>
<table draggable="true"
ondragstart="dragStartHandler(event,'4');"
class="draggable-word"
id="d12" ondragend="dragend(event);"><tr><td id="d12">12</td></tr></table>
<table draggable="true"
ondragstart="dragStartHandler(event,'4');"
class="draggable-word"
id="d13" ondragend="dragend(event);"><tr><td id="d13">13</td></tr></table>
</div>
<div id="print"></div>
</body>
</html>
I am having an issue with drag and drop.
My issue is that when one element is dropped into the dropzone it will sometimes be inserted into another element and not the dropzone div.
jsFiddle: http://jsfiddle/kMbPF/
In the example you can see I have made the tables very large so that it would be very easy to see this. When one table is dropped on top of another table, it does not go into the drop zone with the other elements, but gets inserted inside of another table.
I had a couple of ideas, but I have no idea if they would work. One was if somehow a large div could be inserted over the dropzones to ensure that the elements are always dropped into it. I would see this as almost a transparent layer that catches the elements then places them in the drop zone.
My other idea was to try and get all of the data from the div, put it all into a string, and try to parse this and then replace all the data back into the dropzone.
Also as you will notice, sorting works but only seems to in Firefox, not Safari. This is not my most pressing concern, but if you did happen to see a fix that would be great!(sorting only works on the upper dropzone) I do not want to use jQuery.
Code:
<!DOCTYPE html>
<html lang="en">
<head>
<title>Basic drag and drop example</title>
<style>
@CHARSET "UTF-8";
table.draggable-word {
background-color: red;
padding: 0px;
border: 1px solid green;
-webkit-touch-callout: none;
-webkit-user-select: none;
-khtml-user-select: none;
-moz-user-select: none;
-ms-user-select: none;
user-select: none;
border-collapse: collapse;
border-spacing: 0;
padding: 0;
margin: 0;
line-height: 1;
width: 100%;
height:50px;
}
.drop-div {
width: 150px;
height: 150px;
border: 3px solid #224163;
background-color: #AABACC;
margin-top: 15px;
text-align: center;
overflow: auto;
}
[draggable=true] {
cursor: default;
margin-top: 0px;
margin-bottom: 0px;
margin-top: 0px;
}
table {
border-color: #600;
border-width: 0 0 1px 1px;
border-style: solid;
}
</style>
<script>
var user ="";
var multiples = false;
var data;
function dragStartHandler(event,id) {
event.dataTransfer.setData('Object', event.target.id);
user = id;
multiples = true;
data = event.dataTransfer.getData('Object');
//multipleDrag(data,"false");
}
function dropHandler(event) {
preventDefaults(event);
if (!event.target) {
alert('we');
event.target = event.srcElement
}
data = event.dataTransfer.getData('Object');
event.target.appendChild(document.getElementById(data));
document.getElementById(data).selectedIndex = -1;
//alert(user);
}
function dragOverHandler(event) {
preventDefaults(event);
}
function preventDefaults(event) {
if (event.preventDefault) {
event.preventDefault();
}
try {
event.returnValue = false;
}
catch (exception) {}
}
function dragend(event) {
// multipleDrag(data,"true");
}
function multipleDrag(data,state){
document.getElementById(data).setAttribute("draggable", state);
}
function sort(uList)
{
var listItem = document.getElementById(uList).getElementsByTagName('td');
var listLength = listItem.length;
var list = [];
for(var i=0; i<listItem.length; i++){
list[i] = listItem[i].id.substring(1,listItem[i].id.length);
list.sort(function(a,b) {return parseInt(a) > parseInt(b)})
}
for(var i=0; i<listLength; i++){
listItem[i].firstChild.nodeValue = list[i];
}
}
</script>
</head>
<body>
<div class="drop-div"
ondragover="dragOverHandler(event);"
ondrop="dropHandler(event)"
id="drop-div1" ondragend="sort('drop-div1')"></div>
<div class="drop-div"
ondragover="dragOverHandler(event);"
ondrop="dropHandler(event)"
id="drop-div2">
<table draggable="true"
ondragstart="dragStartHandler(event,'3');"
class="draggable-word"id="d3" ondragend="dragend(event);"
><tr><td id="d3">3</td></tr></table>
<table draggable="true"
ondragstart="dragStartHandler(event,'4');"
class="draggable-word"
id="d4" ondragend="dragend(event);"><tr><td id="d4">4</td></tr></table>
<table draggable="true"
ondragstart="dragStartHandler(event,'4');"
class="draggable-word"
id="d5" ondragend="dragend(event);"><tr><td id="d5">5</td></tr></table>
<table draggable="true"
ondragstart="dragStartHandler(event,'4');"
class="draggable-word"
id="d6" ondragend="dragend(event);"><tr><td id="d6">6</td></tr></table>
<table draggable="true"
ondragstart="dragStartHandler(event,'4');"
class="draggable-word"
id="d7" ondragend="dragend(event);"><tr><td id="d7" >7</td></tr></table>
<table draggable="true"
ondragstart="dragStartHandler(event,'4');"
class="draggable-word"
id="d8" ondragend="dragend(event);"><tr><td id="d8" >8</td></tr></table>
<table draggable="true"
ondragstart="dragStartHandler(event,'4');"
class="draggable-word"
id="d9" ondragend="dragend(event);"><tr><td id="d9">9</td></tr></table>
<table draggable="true"
ondragstart="dragStartHandler(event,'4');"
class="draggable-word"
id="d10" ondragend="dragend(event);"><tr><td id="d10">10</td></tr></table>
<table draggable="true"
ondragstart="dragStartHandler(event,'4');"
class="draggable-word"
id="d11" ondragend="dragend(event);"><tr><td id="d11">11</td></tr></table>
<table draggable="true"
ondragstart="dragStartHandler(event,'4');"
class="draggable-word"
id="d12" ondragend="dragend(event);"><tr><td id="d12">12</td></tr></table>
<table draggable="true"
ondragstart="dragStartHandler(event,'4');"
class="draggable-word"
id="d13" ondragend="dragend(event);"><tr><td id="d13">13</td></tr></table>
</div>
<div id="print"></div>
</body>
</html>
1 Answer
Reset to default 5The drop event is being fired on child elements, so your event.target is the child element. This is normal event bubbling and is only to be expected.
Instead of immediately appending to the event.target like this:
event.target.appendChild(document.getElementById(data));
You need to first find the parent dropzone element. This is quite straightforward if you have something like jQuery you can simply use the closest method. If you don't, then something like this will work (untested, you'll probably need to iron out some bugs):
var dropzone = event.target;
while (dropzone.id != 'drop-div1') {
dropzone = dropzone.parentNode;
}
dropzone.appendChild(document.getElementById(data));
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