ExtJs使用自定义插件动态保存表头配置(隐藏或显示)

Ext.define('ux.plugin.ColumnCustom', {  alias: 'plugin.columnCustom',  xtype: 'columnCustom',  //初始化  init: function (gridPanel) {    var me = this;    me.owner = gridPanel;    //根据已有配置项设置表头状态    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;      //只有常规列才有显式的dataIndex，序号列等非常规列应排除在外      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;      //只有常规列才有显式的dataIndex，序号列等非常规列应排除在外      if (!dataIndex) return;      config[dataIndex] = column.isHidden();    });    //使用xtype作为索引是相对可靠的做法    currentColumnConfig[xtype] = config;    //localStorage的值类型限定为string类型    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();    //默认全部加上自动保存表头插件,此处追加一个可配属性来禁用此插件    if (!me.columnCustomDisable) {      me.addPlugin('columnCustom');    }  }});