easyui datagrid实现拖动表头

$.extend($.fn.datagrid.methods, {
        columnMoving: function (jq) {
            return jq.each(function () {
                var target = this;
                var cells = $(this).datagrid('getPanel').find('div.datagrid-header td[field]');
                cells.draggable({
                    revert: true,
                    cursor: 'pointer',
                    edge: 5,
                    proxy: function (source) {
                        var p = $('<div class="tree-node-proxy tree-dnd-no" style="position:absolute;border:1px solid #ff0000"/>').appendTo('body');
                        p.html($(source).text());
                        p.hide();
                        return p;
                    },
                    onBeforeDrag: function (e) {
                        e.data.startLeft = $(this).offset().left;
                        e.data.startTop = $(this).offset().top;
                    },
                    onStartDrag: function () {
                        $(this).draggable('proxy').css({
                            left: -10000,
                            top: -10000
                        });
                    },
                    onDrag: function (e) {
                        $(this).draggable('proxy').show().css({
                            left: e.pageX + 15,
                            top: e.pageY + 15
                        });
                        return false;
                    }
                }).droppable({
                    accept: 'td[field]',
                    onDragOver: function (e, source) {
                        $(source).draggable('proxy').removeClass('tree-dnd-no').addClass('tree-dnd-yes');
                        $(this).css('border-left', '1px solid #ff0000');
                    },
                    onDragLeave: function (e, source) {
                        $(source).draggable('proxy').removeClass('tree-dnd-yes').addClass('tree-dnd-no');
                        $(this).css('border-left', 0);
                    },
                    onDrop: function (e, source) {
                        $(this).css('border-left', 0);
                        var fromField = $(source).attr('field');
                        var toField = $(this).attr('field');
                        setTimeout(function () {
                            moveField(fromField, toField);
                            $(target).datagrid();
                            $(target).datagrid('columnMoving');
                        }, 0);
                    }
                });

                // move field to another location
                function moveField(from, to) {
                    var columns = $(target).datagrid('options').columns;
                    var cc = columns[0];
                    var c = _remove(from);
                    if (c) {
                        _insert(to, c);
                    }

                    function _remove(field) {
                        for (var i = 0; i < cc.length; i++) {
                            if (cc[i].field == field) {
                                var c = cc[i];
                                cc.splice(i, 1);
                                return c;
                            }
                        }
                        return null;
                    }

                    function _insert(field, c) {
                        var newcc = [];
                        for (var i = 0; i < cc.length; i++) {
                            if (cc[i].field == field) {
                                newcc.push(c);
                            }
                            newcc.push(cc[i]);
                        }
                        columns[0] = newcc;
                    }
                }
            });
        }
    });

 调用方法

$("#enterpriseList").datagrid().datagrid("columnMoving");

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