jquery-easyui中datagrid扩展，隐藏显示表头功能

川长思鸟来 2022-08-14 04:51 330阅读 0赞

今天，后台中需要新增一个功能，用户可以自由选择显示的列，之后保存到本地localStroage中。所以扩展了easyui中datagrid的onHeaderContextMenu方法。

使用方法：

![复制代码][copycode.gif]

_this.$table.datagrid(_.extend({
                        fit: true,
                        border: false,
                        striped: true,
                        method: "get",
                        pagination: true,
                        singleSelect: true,
                        loadMsg: "加载数据中...",
                        columns: _this.getTableColumns(),
                        onResize: function () {
                            if (_this.$ajaxDialog) {
                                _this.$ajaxDialog.dialog("restore");
                                _this.$ajaxDialog.dialog("maximize");
                            }
                        },
                        onSelect: function (rowIndex, rowData) {
                            _this.currentRow = rowData;
                            _this.currentRowIndex = rowIndex;
                            _this.toolbarViewModel.disabled(false);
                        },
                        onLoadError: function () {
                            // $.messager.alert("提示", "服务器忙，请稍后再试！", "warning");
                        },
                        onHeaderContextMenu: function (e, field) {
                            $.fn.easyuiExtension.showHideColumns(_this.$table, {
                                left: e.clientX,
                                top: e.clientY
                            });
                            e.preventDefault();
                        },
                        onRowContextMenu: function (e, rowIndex, rowData) {
                            e.preventDefault();
                            $(this).datagrid("unselectAll");
                            $(this).datagrid("selectRow", rowIndex);
    
                            if (_this.$menu) {
                                _this.$menu.menu("show", {
                                    left: e.pageX,
                                    top: e.pageY
                                });
                            }
                        }
                    }, options));

![复制代码][copycode.gif]

$.fn.easyuiExtension = {
                    showHideColumns: function ($table, position) {
                        var $menus = $(document.createElement("div"));
                        var canClick = true, nonHiddenCount = 0;
                        var columnsFields = $table.datagrid("getColumnFields"),
                            columns = [],
                            columsDetail;
    
                        for (var i in columnsFields) {
        
                            columsDetail = $table.datagrid("getColumnOption", columnsFields[i]);
                            columns.push(columsDetail);
                        }
                       
                        if (columns.length) {
        
                            $menus.menu({
        
                                hideOnUnhover: false,
                                duration: 200,
                                onHide: function () {
        
                                    setTimeout(function () {
        
                                        $menus.menu("destroy");
                                    }, 200);
                                },
                                onClick: function (item) {
        
                                    if (canClick || !item.iconCls) {
        
                                        $table.datagrid((item.iconCls ? "hideColumn" : "showColumn"), item.id);
                                    }
                                }
                            });
    
                            for (var i in columns) {
        
                                var item = columns[i];
                                !item.hidden && nonHiddenCount++;
                                $menus.menu("appendItem", {
        
                                    text: item.title,
                                    id: item.field,
                                    iconCls: item.hidden ? "" : "icon-ok"
                                });
                            }
                            canClick = nonHiddenCount > 1;
                            $menus.menu("show", position);
                        }
                    }
                };

![复制代码][copycode.gif]

效果如下：

![021718138268829.png][]

[![041405283617635.gif][]][041405283617635.gif 1]

[copycode.gif]: /images/20220810/efb4394de34746e598d729f000dbaebd.png
[021718138268829.png]: /images/20220810/9edede0503fc475ab0416713b126560d.png
[041405283617635.gif]: /images/20220810/2c3bfaaca6e94f89881211ab451c391c.png
[041405283617635.gif 1]: http://www.itmmd.com/boke.html