/** hzm modify

     * method: Ext.panel.Table.hasLockedColumns: function(columns) {}

     * function：支持extjs grid colums三元表达式，tbar支持三元表示

        eg: user.users_type == 2 ? {text: "创建日期", flex: 1, dataIndex: 'create_time'} : null,

        var grid = Ext.create('Ext.grid.Panel', {

            columns: [

                new Ext.grid.RowNumberer(),

                user.users_type == 1 ? {text: "创建日期", flex: 1, dataIndex: 'create_time'} : null,

                {text: "备注", flex: 1, sortable: true, dataIndex: 'remark'}

            ]

        });

        user.users_type == 1 ? {

            text:'添加会员',

            iconCls:'add',

            handler:function() {

                MyDesktop.MemberWindow.member.addOrUpdateMember();

            }

        } : null,

        user.users_type == 1 ? '-' : null

     * note: 添加if判断column是否为空

    //源代码：

    if (!column.processed && column.locked) {

        return true;

    }

    */

    Ext.override(Ext.panel.Table, {

        hasLockedColumns: function(columns) {

            var i,

                len,

                column;

            if (Ext.isObject(columns)) {

                columns = columns.items;

            }

            for (i = 0, len = columns.length; i < len; i++) {

                column = columns[i];

                if (column && !column.processed && column.locked) {

                    return true;

                }

            }

        }

    });

    /**

     * hzm modify

     * method: Ext.data.Connection.onComplete : function(request, xdrResult)

     * function: gridpanel数据加载出错时（服务器内部错误），支持返回错误原因

     */

    Ext.override(Ext.data.Connection, {

        onComplete : function(request, xdrResult) {

            var me = this,

                options = request.options,

                result,

                success,

                response;

            try {

                result = me.parseStatus(request.xhr.status);

            } catch (e) {

                // in some browsers we can't access the status if the readyState is not 4, so the request has failed

                result = {

                    success : false,

                    isException : false

                };

            }

            success = me.isXdr ? xdrResult : result.success;

            if (success) {

                response = me.createResponse(request);

                me.fireEvent('requestcomplete', me, response, options);

                Ext.callback(options.success, options.scope, [response, options]);

                /**

                 * hzm modify start

                 * method: Ext.data.Connection.onComplete : function(request, xdrResult)

                 * function: gridpanel数据加载出错时（服务器内部错误），支持返回错误原因

                 * note: 原生系统，无以下段代码

                 */

                if(response && options.operation && !options.operation.response) {

                    options.operation.response = response;

                }

                /*

                 * modify end

                 */

            } else {

                if (result.isException || request.aborted || request.timedout) {

                    response = me.createException(request);

                } else {

                    response = me.createResponse(request);

                }

                me.fireEvent('requestexception', me, response, options);

                Ext.callback(options.failure, options.scope, [response, options]);

            }

            Ext.callback(options.callback, options.scope, [options, success, response]);

            delete me.requests[request.id];

            return response;

        }

    });

    /**

     * hzm modify

     * method: Ext.selection.Model.getSelection : function()

     * function: 当修改并reload后未更新当前grid selected range中的record

     */

    Ext.override(Ext.selection.Model, {

        getSelection: function() {

            var me = this,

                store = me.store,

                arr = this.selected.getRange();

            for(var i = 0; arr && i < arr.length; i++) {

                try {

                    var record = arr[i];

                    var newRecord = store.getById(record.get(record.idProperty));

                    if(newRecord) {

                        arr[i] = newRecord;

                    }

                } catch(e) {

                    alert('ext_override getSelection出现异常，详细信息：' + e);

                }

            }

            return arr;

        }

    });