How to save position of dragged items

Question

HI, I want to save the position of dropped items to database[aspx,javascript]. The user can drop any number of item,resize and delete[hide] and finally when they hit 'save' button ,it should be saved to database. I have code to do this in drop /stop but it will save all the dropped items i want to save only at final stage. I guess lot of developer should have already done this,so please suggest some code.

  $(function() {
      $('#frame img').live('mousemove', function(event) {
          $('#frame img').resizable().parent().draggable();
      });
  });


  $(function() {
      $('#frame img').live('dblclick', function(event) {
          // $(this).resizable("destroy")  not working
          $(this).hide();
          //$(this).unbind("resizable"); not working
          //$(this).removeclass(); not working
      });
  });

  $(document).ready(function() {
      //Counter
      counter = 0;

      //Make element draggable
      $("img").draggable({
          helper: 'clone',
          containment: '#frame',

          //When first dragged
          stop: function(ev, ui) {
              var pos = $(ui.helper).offset();
              objName = "#clonediv" + counter
              $(objName).css({ "left": pos.left, "top": pos.top });

              $(objName).removeClass("drag");
              //When an existiung object is dragged
              $(objName).draggable({
                  containment: 'parent',
                  stop: function(ev, ui) {
                      var pos = $(ui.helper).offset();
                  }
              });
          }
      });

      //Make element droppable
      $("#frame").droppable({

          drop: function(ev, ui) {

              if (ui.helper.attr('id').search(/drag[0-9]/) != -1) {
                  var pos = $(ui.helper).offset();

                  counter++;
                  var element = $(ui.helper).clone();

                  //var element = element1.resizable();
                  element.addClass("tempclass");
                  $(this).append(element);
                  $(".tempclass").attr("id", "clonediv" + counter);
                  //$(".tempclass").attr("onclick",function(){ $(this).remove(););
                  $("#clonediv" + counter).removeClass("tempclass");
                  //Get the dynamically item id
                  draggedNumber = ui.helper.attr('id').search(/drag([0-9])/)
                  itemDragged = "dragged" + RegExp.$1
                  //console.log(itemDragged)
                  //alert('left' + pos.left + ',top' + pos.top + 'of item' + itemDragged);
                  $("#clonediv" + counter).addClass(itemDragged);
              }
          }
      });
      //Make the element resizable


  });

Please correct me,if anything is wrong. Thanks in advance

Answer 1

Assuming your elements are list items under a list with an id of items.

jQuery

var locations = [];

$('#items li').each(function(i) {

    locations[i] = {
        x: $(this).offset().left,
        y: $(this).offset().top
    };

});

Then post this to your server side. Without knowing more specifics, I can't be 100% sure if this is all that is required.

On page load, simply loop through the locations and add an attribute to your li such as (assuming PHP)

HTML/PHP

<ul id="items">
<?php foreach($items as $item): ?>
<li style="left: <?php echo $item['x']; ?>px; top: <?php echo $item['x']; ?>px">item</li>
<?php endforeach; ?>
</ul>

of course you may also need to do

CSS

#items {
    position: relative;
}

#items li {
    position: absolute;
}