SOURCE CODE: Uize.Widget.Swap.Html (view docs)

/*______________
|       ______  |   U I Z E    J A V A S C R I P T    F R A M E W O R K
|     /      /  |   ---------------------------------------------------
|    /    O /   |    MODULE : Uize.Widget.Swap.Html Class
|   /    / /    |
|  /    / /  /| |    ONLINE : http://www.uize.com
| /____/ /__/_| | COPYRIGHT : (c)2005-2016 UIZE
|          /___ |   LICENSE : Available under MIT License or GNU General Public License
|_______________|             http://www.uize.com/license.html
*/

/* Module Meta Data
  type: Class
  importance: 3
  codeCompleteness: 100
  docCompleteness: 2
*/

/*?
  Introduction
    The =Uize.Widget.Swap.Html= class supports swapping between two chunks of HTML, with an accompanying, highly configurable JavaScript animation effect.

    *DEVELOPERS:* `Chris van Rensburg`
*/

Uize.module ({
  name:'Uize.Widget.Swap.Html',
  required:'Uize.Dom.Pos',
  builder:function (_superclass) {
    'use strict';

    return _superclass.subclass ({
      alphastructor:function () {
        this._currentItemNo = 0;
      },

      stateProperties:{
        _background:{
          name:'background',
          value:'#000'
        },
        _content:{
          name:'content|value',
          onChange:function () {
            var m = this;
            if (m.isWired) {
              var
                _currentItem = m.getNode ('item' + m._currentItemNo),
                _nextItemNo = 1 - m._currentItemNo,
                _nextItem = m.getNode ('item' + _nextItemNo)
              ;
              m.prepareForNextItem (_currentItem,_nextItem);
              _nextItem.innerHTML = m._content;
              m._currentItemNo = _nextItemNo;
              m.setCurrentItem (_nextItem);
            }
          },
          value:''
        }
      },

      set:{
        html:{
          process:function (input) {
            var _shellSize = Uize.Dom.Pos.getDimensions (this.getNode ());
            function _getItemTag (_itemNo) {
              return (
                '<div id="' + input.idPrefix + '-item' + _itemNo +
                '" style="position:absolute; margin:0px; padding:0px; left:0px; top:0px; width:' + _shellSize.width +
                'px; height:' + _shellSize.height + 'px; background:' + input.background +
                '; overflow:hidden;"></div>'
              );
            }
            return _getItemTag (0) + _getItemTag (1);
          }
        }
      }
    });
  }
});