Grid initComponent in ExtJS 4.1

gistfile1.txt

    initComponent: function() {

        var me          = this,
            scroll      = me.scroll,
            vertical    = false,
            horizontal  = false,
            headerCtCfg = me.columns || me.colModel,
            view,
            border = me.border,
            i, len;

        if (me.columnLines) {
            me.addCls(Ext.baseCSSPrefix + 'grid-with-col-lines');
        }

        if (me.rowLines) {
            me.addCls(Ext.baseCSSPrefix + 'grid-with-row-lines');
        }

        
        me.store = Ext.data.StoreManager.lookup(me.store || 'ext-empty-store');


        
        
        if (headerCtCfg instanceof Ext.grid.header.Container) {
            me.headerCt = headerCtCfg;
            me.headerCt.border = border;
            me.columns = me.headerCt.items.items;
        } else {
            if (Ext.isArray(headerCtCfg)) {
                headerCtCfg = {
                    items: headerCtCfg,
                    border: border
                };
            }
            Ext.apply(headerCtCfg, {
                forceFit: me.forceFit,
                sortable: me.sortableColumns,
                enableColumnMove: me.enableColumnMove,
                enableColumnResize: me.enableColumnResize,
                enableColumnHide: me.enableColumnHide,
                border:  border,
                sealed: me.sealedColumns
            });
            me.columns = headerCtCfg.items;

             
             
             if (me.enableLocking || Ext.ComponentQuery.query('{locked !== undefined}{processed != true}', me.columns).length) {
                 me.self.mixin('lockable', Ext.grid.Lockable);
                 me.injectLockable();
             }
        }

        me.scrollTask = new Ext.util.DelayedTask(me.syncHorizontalScroll, me);

        me.addEvents(
            
            'reconfigure',
            
            'viewready'
        );

        me.bodyCls = me.bodyCls || '';
        me.bodyCls += (' ' + me.extraBodyCls);
        
        me.cls = me.cls || '';
        me.cls += (' ' + me.extraBaseCls);

        
        delete me.autoScroll;

        
        
        if (!me.hasView) {

            
            
            if (!me.headerCt) {
                me.headerCt = new Ext.grid.header.Container(headerCtCfg);
            }

            
            me.columns = me.headerCt.items.items;

            
            if (me.store.buffered && !me.store.remoteSort) {
                for (i = 0, len = me.columns.length; i < len; i++) {
                    me.columns[i].sortable = false;
                }
            }

            if (me.hideHeaders) {
                me.headerCt.height = 0;
                me.headerCt.addCls(Ext.baseCSSPrefix + 'grid-header-ct-hidden');
                me.addCls(Ext.baseCSSPrefix + 'grid-header-hidden');
                
                
                if (Ext.isIEQuirks) {
                    me.headerCt.style = {
                        display: 'none'
                    };
                }
            }

            
            if (scroll === true || scroll === 'both') {
                vertical = horizontal = true;
            } else if (scroll === 'horizontal') {
                horizontal = true;
            } else if (scroll === 'vertical') {
                vertical = true;
            }

            me.relayHeaderCtEvents(me.headerCt);
            me.features = me.features || [];
            if (!Ext.isArray(me.features)) {
                me.features = [me.features];
            }
            me.dockedItems = [].concat(me.dockedItems || []);
            me.dockedItems.unshift(me.headerCt);
            me.viewConfig = me.viewConfig || {};

            
            if (me.store && me.store.buffered) {
                me.viewConfig.preserveScrollOnRefresh = true;
            } else if (me.invalidateScrollerOnRefresh !== undefined) {
                me.viewConfig.preserveScrollOnRefresh = !me.invalidateScrollerOnRefresh;
            }

            
            
            view = me.getView();

            me.items = [view];
            me.hasView = true;

            if (vertical) {
                
                
                if (me.store.buffered) {
                    me.verticalScroller = new Ext.grid.PagingScroller(Ext.apply({
                        panel: me,
                        store: me.store,
                        view: me.view
                    }, me.verticalScroller));
                }
            }

            if (horizontal) {
                
                
                if (!me.hideHeaders) {
                    view.on({
                        scroll: {
                            fn: me.onHorizontalScroll,
                            element: 'el',
                            scope: me
                        }
                    });
                }
            }

            me.mon(view.store, {
                load: me.onStoreLoad,
                scope: me
            });
            me.mon(view, {
                viewready: me.onViewReady,
                refresh: me.onRestoreHorzScroll,
                scope: me
            });
        }