topical media & game development

topical media & game development

[] readme course(s) preface I 1 2 II 3 4 III 5 6 7 IV 8 9 10 V 11 12 afterthought(s) appendix reference(s) example(s) resource(s) _

basic-ajax-09-simple-dnd.js / js

****************************************************************************** Simple DnD Copyright (c) 2006 Ben Sherratt Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. ******************************************************************************


  
  
  var xHRObject = false;
  
  if (window.XMLHttpRequest)
  {
  xHRObject = new XMLHttpRequest();
  }
  else if (window.ActiveXObject)
  {
  xHRObject = new ActiveXObject("Microsoft.XMLHTTP");
  }
  
                 
  var list = null;
  var listItems = null;
  Display();
  
  function makeDnD(list) {
       // Get the items of the list
       var listItems = list.getElementsByTagName("div");
  
       for(var i = 0; i < listItems.length; i++) {
            var listItem = listItems[i];
  
            // Setup the drag
            Drag.init(listItem, null, 0, 0);
  
            listItem.onDragStart = function() {
                 var listItem = Drag.obj;
                 list = listItem.parentNode;
  
                 // Set temp variables
                 listItem.items = list.getElementsByTagName("div");
  
                 for(var i = 0; i < listItem.items.length; i++)
                      if(listItem.items[i] == listItem)
                           listItem.position = i;
  
                 listItem.originalPosition = listItem.position;
  
                 // Set the style
                 listItem.style.opacity = 0.75;
                 listItem.style.filter = "alpha(opacity=75)";
                 listItem.style.zIndex = listItem.items.length;
            };
  
            listItem.onDrag = function(x, y, e) {
                 var listItem = Drag.obj;
  
                 var top = listItem.offsetTop + (listItem.offsetHeight / 2);
  
                 if(listItem.position != 0 && listItem.position <= listItem.originalPosition && top < (listItem.items[listItem.position - 1].offsetTop + (listItem.items[listItem.position - 1].offsetHeight / 2))) {
                      // Change the position and top
                      listItem.position--;
                      listItem.items[listItem.position].style.top = listItem.offsetHeight + "px";
                 } else if(listItem.position != 0 && listItem.position > listItem.originalPosition && top < (listItem.items[listItem.position].offsetTop + (listItem.items[listItem.position].offsetHeight / 2))) {
                      // Change the position and top
                      listItem.position--;
                      listItem.items[listItem.position + 1].style.top = "0px";
                 } else if(listItem.position != listItem.items.length - 1 && listItem.position >= listItem.originalPosition && top > (listItem.items[listItem.position + 1].offsetTop + (listItem.items[listItem.position + 1].offsetHeight / 2))) {
                      // Change the position and top
                      listItem.position++;
                      listItem.items[listItem.position].style.top = -listItem.offsetHeight + "px";
                 } else if(listItem.position != listItem.items.length - 1 && listItem.position < listItem.originalPosition && top > (listItem.items[listItem.position].offsetTop + (listItem.items[listItem.position].offsetHeight / 2))) {
                      // Change the position and top
                      listItem.position++;
                      listItem.items[listItem.position - 1].style.top = "0px";
                 }
            };
  
            listItem.onDragEnd = function(x, y, e) {
                 var listItem = Drag.obj;
  
                 for(var i = 0; i < listItem.items.length; i++)
                      listItem.items[i].style.top = "0px";
  
                 // Remove the item
                 list.removeChild(listItem);
  
                 // Re-insert the item
                 if(listItem.items[listItem.position])
                      list.insertBefore(listItem, listItem.items[listItem.position]);
                 else
                      list.appendChild(listItem);
  
                 // Unset temp variables
            //     listItem.items = null;
                 listItem.position = null;
                 listItem.originalPosition = null;
  
                 // Unset the style
                 listItem.style.opacity = 1.00;
                 listItem.style.filter = "alpha(opacity=100)";
                 listItem.style.zIndex = 0;
            };
       }
  }
  
  function Display()
  {
         xHRObject.onreadystatechange = getData;    
       xHRObject.open("GET", "List.xml?id="+ Number(new Date()),true);
       xHRObject.send(null);   
  }

[] readme course(s) preface I 1 2 II 3 4 III 5 6 7 IV 8 9 10 V 11 12 afterthought(s) appendix reference(s) example(s) resource(s) _

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