Ext.define('ux.plugin.ColumnCustom', {  alias: 'plugin.columnCustom',  xtype: 'columnCustom',  //初始化  init: function (gridPanel) {    var me = this;    me.owner = gridPanel;    //根據已有配置項設置表頭狀態    me.setColumnConfig(gridPanel);    gridPanel.on({      columnschanged: me.saveColumnConfig,      scope: me    });  },  setColumnConfig: function (gridPanel) {    var me = this,      xtype = gridPanel.getXType(),      currentColumnConfig = me.getCurrentColumnConfig(),      columnConfig = currentColumnConfig[xtype],      columns = gridPanel.getColumns();    if (!columnConfig) return;    columns.forEach(function (column) {      var dataIndex = column.config.dataIndex;      //只有常規列才有顯式的dataIndex，序號列等非常規列應排除在外      if (!dataIndex) return;      column.setHidden(columnConfig[dataIndex]);    });  },  saveColumnConfig: function () {    var me = this,      gridPanel = me.owner,      currentColumnConfig = me.getCurrentColumnConfig(),      columns = gridPanel.getColumns(),      xtype = gridPanel.getXType(),      config = {};    columns.forEach(function (column) {      var dataIndex = column.config.dataIndex;      //只有常規列才有顯式的dataIndex，序號列等非常規列應排除在外      if (!dataIndex) return;      config[dataIndex] = column.isHidden();    });    //使用xtype作為索引是相對可靠的做法    currentColumnConfig[xtype] = config;    //localStorage的值類型限定為string類型    localStorage.setItem('columnConfig', Ext.encode(currentColumnConfig));  },  getCurrentColumnConfig: function () {    var allColumnConfigString = localStorage.getItem('columnConfig'),      allColumnConfig = Ext.decode(allColumnConfigString, true);    return allColumnConfig || {};  }});

Ext.define('override.grid.Panel', {  override: 'Ext.grid.Panel',  requires: ['ux.plugin.ColumnCustom'],  columnCustomDisable: false,  initComponent: function () {    var me = this;    me.callParent();    //默認全部加上自動保存表頭插件,此處追加一個可配屬性來禁用此插件    if (!me.columnCustomDisable) {      me.addPlugin('columnCustom');    }  }});