When I drag and drop two divs inside a modal popup, their positions shift down during the animation. I am struggling to fix this issue.
HTML Code:
<title>
Tile Swapping with Animation</title>
<body>
<button type="button" class="btn btn-info btn-lg" data-toggle="modal" data-target="#myModal">Open Modal</button>
<!-- Modal -->
<div id="myModal" class="modal fade" role="dialog">
<div class="modal-dialog">
<!-- Modal content-->
<div class="modal-content">
<div class="modal-header">
<button type="button" class="close" data-dismiss="modal">×</button>
<h4 class="modal-title">Modal Header</h4>
</div>
<div class="modal-body">
<p>Some text in the modal.</p>
<div class='droppable'>
<div class="draggable">Draggable 1</div>
</div>
<div class='droppable'>
<div class="draggable">Draggable 2</div>
</div>
</div>
<div class="modal-footer">
<button type="button" class="btn btn-default" data-dismiss="modal">Close</button>
</div>
</div>
</div>
</div>
JavaScript Code:
$(document).ready(function() {
window.startPos = window.endPos = {};
makeDraggable();
$('.droppable').droppable({
hoverClass: 'hoverClass',
drop: function(event, ui) {
var $from = $(ui.draggable),
$fromParent = $from.parent(),
$to = $(this).children(),
$toParent = $(this);
window.endPos = $to.offset();
swap($from, $from.offset(), window.endPos, 200);
swap($to, window.endPos, window.startPos, 1000, function() {
$toParent.html($from.css({
position: 'relative',
left: '',
top: '',
'z-index': ''
}));
$fromParent.html($to.css({
position: 'relative',
left: '',
top: '',
'z-index': ''
}));
makeDraggable();
});
}
});
function makeDraggable() {
$('.draggable').draggable({
zIndex: 99999,
revert: 'invalid',
start: function(event, ui) {
window.startPos = $(this).offset();
}
});
}
function swap($el, fromPos, toPos, duration, callback) {
$el.css('position', 'absolute')
.css(fromPos)
.animate(toPos, duration, function() {
if (callback) callback();
});
}
});