1 Ext.define('ux.plugin.ColumnCustom', {
 2     alias: 'plugin.columnCustom',
 3     xtype: 'columnCustom',
 4     //初始化
 5     init: function (gridPanel) {
 6         var me = this;
 7         me.owner = gridPanel;
 8         //根据已有配置项设置表头状态
 9         me.setColumnConfig(gridPanel);
10         gridPanel.on({
11             columnschanged: me.saveColumnConfig,
12             scope: me
13         });
14     },
15 
16     setColumnConfig: function (gridPanel) {
17         var me = this,
18             xtype = gridPanel.getXType(),
19             currentColumnConfig = me.getCurrentColumnConfig(),
20             columnConfig = currentColumnConfig[xtype],
21             columns = gridPanel.getColumns();
22         if (!columnConfig) return;
23         columns.forEach(function (column) {
24             var dataIndex = column.config.dataIndex;
25             //只有常规列才有显式的dataIndex，序号列等非常规列应排除在外
26             if (!dataIndex) return;
27             column.setHidden(columnConfig[dataIndex]);
28         });
29     },
30     saveColumnConfig: function () {
31         var me = this,
32             gridPanel = me.owner,
33             currentColumnConfig = me.getCurrentColumnConfig(),
34             columns = gridPanel.getColumns(),
35             xtype = gridPanel.getXType(),
36             config = {};
37         columns.forEach(function (column) {
38             var dataIndex = column.config.dataIndex;
39             //只有常规列才有显式的dataIndex，序号列等非常规列应排除在外
40             if (!dataIndex) return;
41             config[dataIndex] = column.isHidden();
42         });
43         //使用xtype作为索引是相对可靠的做法
44         currentColumnConfig[xtype] = config;
45         //localStorage的值类型限定为string类型
46         localStorage.setItem('columnConfig', Ext.encode(currentColumnConfig));
47 
48     },
49     getCurrentColumnConfig: function () {
50         var allColumnConfigString = localStorage.getItem('columnConfig'),
51             allColumnConfig = Ext.decode(allColumnConfigString, true);
52         return allColumnConfig || {};
53     }
54 });

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');
        }
    }
});