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javascriptjquerydrag-and-drop

One Way Drag and Drop Between Two Lists

I'm using the following JS code which I obtained from jQuery UI: moving items from one list to another:

$("#list-one, #list-two").sortable({
                    connectWith: '.connectedSortable',
                    start: function () {
                        sender = $(this);
                        recvok = false;
                    },
                    over: function () {
                        recvok = ($(this).not(sender).length != 0);
                    },
                    stop: function () {
                        if (!recvok)
                            $(this).sortable('cancel');
                    }
                }).disableSelection();

This code allows drag and drop from the first to the second list and vice-versa. I only want drag and drop to work in one direction, from the first to the second list. Is this possible? Any help would be greatly appreciated. Thanks.

Solution

  • You just change the attribute connectWith: here i refuse to drag from list2 to list1..

      $("#list-one, #list-two").sortable({
                    connectWith: '#list-two',
                    start: function () {
                        sender = $(this);
                        recvok = false;
                    },
                    over: function () {
                        recvok = ($(this).not(sender).length != 0);
                    },
                    stop: function () {
                        if (!recvok)
                            $(this).sortable('cancel');
                    }
                }).disableSelection();
    <!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>jQuery UI Sortable - Connect lists</title>
  <link rel="stylesheet" href="//code.jquery.com/ui/1.12.1/themes/base/jquery-ui.css">
  <link rel="stylesheet" href="/resources/demos/style.css">
  <style>
  #sortable1, #sortable2 {
    border: 1px solid #eee;
    width: 142px;
    min-height: 20px;
    list-style-type: none;
    margin: 0;
    padding: 5px 0 0 0;
    float: left;
    margin-right: 10px;
  }
  #sortable1 li, #sortable2 li {
    margin: 0 5px 5px 5px;
    padding: 5px;
    font-size: 1.2em;
    width: 120px;
  }
  </style>
  <script src="https://code.jquery.com/jquery-1.12.4.js"></script>
  <script src="https://code.jquery.com/ui/1.12.1/jquery-ui.js"></script>

</head>
<body>
 
<ul id="list-one" class="connectedSortable">
  <li class="ui-state-default">Item 1</li>
  <li class="ui-state-default">Item 2</li>
  <li class="ui-state-default">Item 3</li>
  <li class="ui-state-default">Item 4</li>
  <li class="ui-state-default">Item 5</li>
</ul>
 
<ul id="list-two" class="connectedSortable">
  <li class="ui-state-highlight">Item 1</li>
  <li class="ui-state-highlight">Item 2</li>
  <li class="ui-state-highlight">Item 3</li>
  <li class="ui-state-highlight">Item 4</li>
  <li class="ui-state-highlight">Item 5</li>
</ul>
 
 
</body>
</html>

    another solution is to prevent the mousedown event on second list, but you cant reorder the list

      $('#list-two li').mousedown(function(event){
   event.preventDefault();
   event.stopPropagation();
  });

  $("#list-one, #list-two").sortable({
                    connectWith: '.connectedSortable',
                    start: function () {
                        sender = $(this);
                        recvok = false;
                    },
                    over: function () {
                        recvok = ($(this).not(sender).length != 0);
                    },
                    stop: function () {
                        if (!recvok)
                            $(this).sortable('cancel');
                    }
                }).disableSelection();
    <!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>jQuery UI Sortable - Connect lists</title>
  <link rel="stylesheet" href="//code.jquery.com/ui/1.12.1/themes/base/jquery-ui.css">
  <link rel="stylesheet" href="/resources/demos/style.css">
  <style>
  #sortable1, #sortable2 {
    border: 1px solid #eee;
    width: 142px;
    min-height: 20px;
    list-style-type: none;
    margin: 0;
    padding: 5px 0 0 0;
    float: left;
    margin-right: 10px;
  }
  #sortable1 li, #sortable2 li {
    margin: 0 5px 5px 5px;
    padding: 5px;
    font-size: 1.2em;
    width: 120px;
  }
  </style>
  <script src="https://code.jquery.com/jquery-1.12.4.js"></script>
  <script src="https://code.jquery.com/ui/1.12.1/jquery-ui.js"></script>

</head>
<body>
 
<ul id="list-one" class="connectedSortable">
  <li class="ui-state-default">Item 1</li>
  <li class="ui-state-default">Item 2</li>
  <li class="ui-state-default">Item 3</li>
  <li class="ui-state-default">Item 4</li>
  <li class="ui-state-default">Item 5</li>
</ul>
 
<ul id="list-two" class="connectedSortable">
  <li class="ui-state-highlight">Item 1</li>
  <li class="ui-state-highlight">Item 2</li>
  <li class="ui-state-highlight">Item 3</li>
  <li class="ui-state-highlight">Item 4</li>
  <li class="ui-state-highlight">Item 5</li>
</ul>
 
 
</body>
</html>