xtype      Class-------------  ------------------box       Ext.BoxComponentbutton      Ext.Buttonbuttongroup   Ext.ButtonGroupcolorpalette   Ext.ColorPalettecomponent    Ext.Componentcontainer    Ext.Containercycle      Ext.CycleButtondataview     Ext.DataViewdatepicker    Ext.DatePickereditor      Ext.Editoreditorgrid    Ext.grid.EditorGridPanelflash      Ext.FlashComponentgrid       Ext.grid.GridPanellistview     Ext.ListViewpanel      Ext.Panelprogress     Ext.ProgressBarpropertygrid   Ext.grid.PropertyGridslider      Ext.Sliderspacer      Ext.Spacersplitbutton   Ext.SplitButtontabpanel     Ext.TabPaneltreepanel    Ext.tree.TreePanelviewport     Ext.ViewPortwindow      Ext.WindowToolbar components---------------------------------------paging      Ext.PagingToolbartoolbar     Ext.Toolbartbbutton     Ext.Toolbar.Button    (deprecated; use button)tbfill      Ext.Toolbar.Filltbitem      Ext.Toolbar.Itemtbseparator   Ext.Toolbar.Separatortbspacer     Ext.Toolbar.Spacertbsplit     Ext.Toolbar.SplitButton  (deprecated; use splitbutton)tbtext      Ext.Toolbar.TextItemMenu components---------------------------------------menu       Ext.menu.Menucolormenu    Ext.menu.ColorMenudatemenu     Ext.menu.DateMenumenubaseitem   Ext.menu.BaseItemmenucheckitem  Ext.menu.CheckItemmenuitem     Ext.menu.Itemmenuseparator  Ext.menu.Separatormenutextitem   Ext.menu.TextItemForm components---------------------------------------form       Ext.FormPanelcheckbox     Ext.form.Checkboxcheckboxgroup  Ext.form.CheckboxGroupcombo      Ext.form.ComboBoxdatefield    Ext.form.DateFielddisplayfield   Ext.form.DisplayFieldfield      Ext.form.Fieldfieldset     Ext.form.FieldSethidden      Ext.form.Hiddenhtmleditor    Ext.form.HtmlEditorlabel      Ext.form.Labelnumberfield   Ext.form.NumberFieldradio      Ext.form.Radioradiogroup    Ext.form.RadioGrouptextarea     Ext.form.TextAreatextfield    Ext.form.TextFieldtimefield    Ext.form.TimeFieldtrigger     Ext.form.TriggerFieldChart components---------------------------------------chart      Ext.chart.Chartbarchart     Ext.chart.BarChartcartesianchart  Ext.chart.CartesianChartcolumnchart   Ext.chart.ColumnChartlinechart    Ext.chart.LineChartpiechart     Ext.chart.PieChartStore xtypes---------------------------------------arraystore    Ext.data.ArrayStoredirectstore   Ext.data.DirectStoregroupingstore  Ext.data.GroupingStorejsonstore    Ext.data.JsonStoresimplestore   Ext.data.SimpleStore   (deprecated; use arraystore)store      Ext.data.Storexmlstore     Ext.data.XmlStore

defaults：xtypes的默認值，如：

 defaults:{xtype:"textfield",width:180},