/**
 * @class Ext.ListView
 * @extends Ext.DataView
 * 
Ext.ListView is a fast and light-weight implentation of a
 * {@link Ext.grid.GridPanel Grid} like view with the following characteristics:
 * 

 * 
resizable columns
 * 
selectable
 * 
column widths are initially proportioned by percentage based on the container
 * width and number of columns
 * 
uses templates to render the data in any required format
 * 
no horizontal scrolling
 * 
no editing
 * 
 * 
Example usage:
 * 

// consume JSON of this form:
{
   "images":[
      {
         "name":"dance_fever.jpg",
         "size":2067,
         "lastmod":1236974993000,
         "url":"images\/thumbs\/dance_fever.jpg"
      },
      {
         "name":"zack_sink.jpg",
         "size":2303,
         "lastmod":1236974993000,
         "url":"images\/thumbs\/zack_sink.jpg"
      }
   ]
} 
var store = new Ext.data.JsonStore({
    url: 'get-images.php',
    root: 'images',
    fields: [
        'name', 'url',
        {name:'size', type: 'float'},
        {name:'lastmod', type:'date', dateFormat:'timestamp'}
    ]
});
store.load();

var listView = new Ext.ListView({
    store: store,
    multiSelect: true,
    emptyText: 'No images to display',
    reserveScrollOffset: true,
    columns: [{
        header: 'File',
        width: .5,
        dataIndex: 'name'
    },{
        header: 'Last Modified',
        width: .35, 
        dataIndex: 'lastmod',
        tpl: '{lastmod:date("m-d h:i a")}'
    },{
        header: 'Size',
        dataIndex: 'size',
        tpl: '{size:fileSize}', // format using Ext.util.Format.fileSize()
        align: 'right'
    }]
});

// put it in a Panel so it looks pretty
var panel = new Ext.Panel({
    id:'images-view',
    width:425,
    height:250,
    collapsible:true,
    layout:'fit',
    title:'Simple ListView (0 items selected)',
    items: listView
});
panel.render(document.body);

// little bit of feedback
listView.on('selectionchange', function(view, nodes){
    var l = nodes.length;
    var s = l != 1 ? 's' : '';
    panel.setTitle('Simple ListView ('+l+' item'+s+' selected)');
});
 * 
 * @constructor
 * @param {Object} config
 * @xtype listview
 */
Ext.ListView = Ext.extend(Ext.DataView, {
    
/**
     * Set this property to true to disable the header click handler disabling sort
     * (defaults to false).
     * @type Boolean
     * @property disableHeaders
     */
    
/**
     * @cfg {Boolean} hideHeaders
     * true to hide the {@link #internalTpl header row} (defaults to false so
     * the {@link #internalTpl header row} will be shown).
     */
    
/**
     * @cfg {String} itemSelector
     * Defaults to 'dl' to work with the preconfigured {@link Ext.DataView#tpl tpl}.
     * This setting specifies the CSS selector (e.g. div.some-class or span:first-child)
     * that will be used to determine what nodes the ListView will be working with.   
     */
    itemSelector: 'dl',
    
/**
     * @cfg {String} selectedClass The CSS class applied to a selected row (defaults to
     * 'x-list-selected'). An example overriding the default styling:
    

    .x-list-selected {background-color: yellow;}
    
     * @type String
     */
    selectedClass:'x-list-selected',
    
/**
     * @cfg {String} overClass The CSS class applied when over a row (defaults to
     * 'x-list-over'). An example overriding the default styling:
    

    .x-list-over {background-color: orange;}
    
     * @type String
     */
    overClass:'x-list-over',
    
/**
     * @cfg {Boolean} reserveScrollOffset
     * By default will defer accounting for the configured {@link #scrollOffset}
     * for 10 milliseconds.  Specify true to account for the configured
     * {@link #scrollOffset} immediately.
     */
    
/**
     * @cfg {Number} scrollOffset The amount of space to reserve for the scrollbar (defaults to
     * 19 pixels)
     */
    scrollOffset : 19,
    
/**
     * @cfg {Boolean/Object} columnResize
     * Specify true or specify a configuration object for {@link Ext.ListView.ColumnResizer}
     * to enable the columns to be resizable (defaults to true).
     */
    columnResize: true,
    
/**
     * @cfg {Array} columns An array of column configuration objects, for example:
     * 

{
    align: 'right',
    dataIndex: 'size',
    header: 'Size',
    tpl: '{size:fileSize}',
    width: .35
}
     * 
 
     * Acceptable properties for each column configuration object are:
     * 

     * 
align : String
Set the CSS text-align property
     * of the column. Defaults to 'left'.
     * 
dataIndex : String
See {@link Ext.grid.Column}.
     * {@link Ext.grid.Column#dataIndex dataIndex} for details.
     * 
header : String
See {@link Ext.grid.Column}.
     * {@link Ext.grid.Column#header header} for details.
     * 
tpl : String
Specify a string to pass as the
     * configuration string for {@link Ext.XTemplate}.  By default an {@link Ext.XTemplate}
     * will be implicitly created using the dataIndex.
     * 
width : Number
Percentage of the container width
     * this column should be allocated.  Columns that have no width specified will be
     * allocated with an equal percentage to fill 100% of the container width.  To easily take
     * advantage of the full container width, leave the width of at least one column undefined.
     * Note that if you do not want to take up the full width of the container, the width of
     * every column needs to be explicitly defined.
     * 
     */
    
/**
     * @cfg {Boolean/Object} columnSort
     * Specify true or specify a configuration object for {@link Ext.ListView.Sorter}
     * to enable the columns to be sortable (defaults to true).
     */
    columnSort: true,
    
/**
     * @cfg {String/Array} internalTpl
     * The template to be used for the header row.  See {@link #tpl} for more details.
     */

    initComponent : function(){
        if(this.columnResize){
            this.colResizer = new Ext.ListView.ColumnResizer(this.colResizer);
            this.colResizer.init(this);
        }
        if(this.columnSort){
            this.colSorter = new Ext.ListView.Sorter(this.columnSort);
            this.colSorter.init(this);
        }
        if(!this.internalTpl){
            this.internalTpl = new Ext.XTemplate(
                '
',
                    '',
                    '
',
                        '{header}',
                    '
',
                    '',
                    '
',
                '
',
                '
',
                '
'
            );
        }
        if(!this.tpl){
            this.tpl = new Ext.XTemplate(
                '',
                    '
',
                        '',
                        '
',
                            '{[values.tpl.apply(parent)]}',
                        '
',
                        '',
                        '
',
                    '
',
                ''
            );
        };
        var cs = this.columns, allocatedWidth = 0, colsWithWidth = 0, len = cs.length;
        for(var i = 0; i < len; i++){
            var c = cs[i];
            if(!c.tpl){
                c.tpl = new Ext.XTemplate('{' + c.dataIndex + '}');
            }else if(Ext.isString(c.tpl)){
                c.tpl = new Ext.XTemplate(c.tpl);
            }
            c.align = c.align || 'left';
            if(Ext.isNumber(c.width)){
                c.width *= 100;
                allocatedWidth += c.width;
                colsWithWidth++;
            }
        }
        // auto calculate missing column widths
        if(colsWithWidth < len){
            var remaining = len - colsWithWidth;
            if(allocatedWidth < 100){
                var perCol = ((100-allocatedWidth) / remaining);
                for(var j = 0; j < len; j++){
                    var c = cs[j];
                    if(!Ext.isNumber(c.width)){
                        c.width = perCol;
                    }
                }
            }
        }
        Ext.ListView.superclass.initComponent.call(this);
    },

    onRender : function(){
        Ext.ListView.superclass.onRender.apply(this, arguments);

        this.internalTpl.overwrite(this.el, {columns: this.columns});
        
        this.innerBody = Ext.get(this.el.dom.childNodes[1].firstChild);
        this.innerHd = Ext.get(this.el.dom.firstChild.firstChild);

        if(this.hideHeaders){
            this.el.dom.firstChild.style.display = 'none';
        }
    },

    getTemplateTarget : function(){
        return this.innerBody;
    },

    
/**
     * 
Function which can be overridden which returns the data object passed to this
     * view's {@link #tpl template} to render the whole ListView. The returned object 
     * shall contain the following properties:
     * 

     * 
columns : String
See {@link #columns}
     * 
rows : String
See
     * {@link Ext.DataView}.{@link Ext.DataView#collectData collectData}

     * 

     * @param {Array} records An Array of {@link Ext.data.Record}s to be rendered into the DataView.
     * @param {Number} startIndex the index number of the Record being prepared for rendering.
     * @return {Object} A data object containing properties to be processed by a repeating
     * XTemplate as described above.
     */
    collectData : function(){
        var rs = Ext.ListView.superclass.collectData.apply(this, arguments);
        return {
            columns: this.columns,
            rows: rs
        }
    },

    verifyInternalSize : function(){
        if(this.lastSize){
            this.onResize(this.lastSize.width, this.lastSize.height);
        }
    },

    // private
    onResize : function(w, h){
        var bd = this.innerBody.dom;
        var hd = this.innerHd.dom
        if(!bd){
            return;
        }
        var bdp = bd.parentNode;
        if(Ext.isNumber(w)){
            var sw = w - this.scrollOffset;
            if(this.reserveScrollOffset || ((bdp.offsetWidth - bdp.clientWidth) > 10)){
                bd.style.width = sw + 'px';
                hd.style.width = sw + 'px';
            }else{
                bd.style.width = w + 'px';
                hd.style.width = w + 'px';
                setTimeout(function(){
                    if((bdp.offsetWidth - bdp.clientWidth) > 10){
                        bd.style.width = sw + 'px';
                        hd.style.width = sw + 'px';
                    }
                }, 10);
            }
        }
        if(Ext.isNumber(h == 'number')){
            bdp.style.height = (h - hd.parentNode.offsetHeight) + 'px';
        }
    },

    updateIndexes : function(){
        Ext.ListView.superclass.updateIndexes.apply(this, arguments);
        this.verifyInternalSize();
    },

    findHeaderIndex : function(hd){
        hd = hd.dom || hd;
        var pn = hd.parentNode, cs = pn.parentNode.childNodes;
        for(var i = 0, c; c = cs[i]; i++){
            if(c == pn){
                return i;
            }
        }
        return -1;
    },

    setHdWidths : function(){
        var els = this.innerHd.dom.getElementsByTagName('div');
        for(var i = 0, cs = this.columns, len = cs.length; i < len; i++){
            els[i].style.width = cs[i].width + '%';
        }
    }
});

Ext.reg('listview', Ext.ListView);