上篇给大家介绍了JS 组件系列之 bootstrap treegrid 组件封装过程，下面重点给大家介绍JS 组件系列之BootstrapTable的treegrid功能，需要的的朋友一起学习吧！
一、效果预览
全部折叠
展开一级
全部展开
二、代码示例
怎么样？效果还行吧。给出js的源码供大家参考。
(function ($) {
'use strict';
var sprintf = function (str) {
var args = arguments,
flag = true,
i = 1;
str = str.replace(/%s/g, function () {
var arg = args[i++];
if (typeof arg === 'undefined') {
flag = false;
return '';
}
return arg;
});
return flag ? str : '';
};
var getFieldIndex = function (columns, field) {
var index = -1;
$.each(columns, function (i, column) {
if (column.field === field) {
index = i;
return false;
}
return true;
});
return index;
};
var calculateObjectValue = function (self, name, args, defaultValue) {
var func = name;
if (typeof name === 'string') {
var names = name.split('.');
if (names.length > 1) {
func = window;
$.each(names, function (i, f) {
func = func[f];
});
} else {
func = window[name];
}
}
if (typeof func === 'object') {
return func;
}
if (typeof func === 'function') {
return func.apply(self, args);
}
if (!func && typeof name === 'string' && sprintf.apply(this, [name].concat(args))) {
return sprintf.apply(this, [name].concat(args));
}
return defaultValue;
};
var getItemField = function (item, field) {
var value = item;
if (typeof field !== 'string' || item.hasOwnProperty(field)) {
return item[field];
}
var props = field.split('.');
for (var p in props) {
value = value[props[p]];
}
return value;
};
var getParent = function (node, source, field) {
var data = [];
var items = $.grep(source, function (item, index) {
return node.ParentId == item[field];
});
$.each(items, function (index, item) {
data.splice(0, 0, item);
var child = getParent(item, source, field);
$.each(child, function (i, n) {
data.splice(0, 0, n);
});
});
return data;
};
var getChild = function (node, source, field) {
var data = [];
var items = $.grep(source, function (item, index) {
return item.ParentId == node[field];
});
$.each(items, function (index, item) {
data.push(item);
var child = getChild(item, source, field);
$.each(child, function (i, n) {
data.push(n);
});
});
return data;
};
//调用bootstrapTable组件的构造器得到对象
var BootstrapTable = $.fn.bootstrapTable.Constructor,
_initData = BootstrapTable.prototype.initData,
_initPagination = BootstrapTable.prototype.initPagination,
_initBody = BootstrapTable.prototype.initBody;
//重写bootstrapTable的initData方法
BootstrapTable.prototype.initData = function () {
_initData.apply(this, Array.prototype.slice.apply(arguments));
var that = this;
if (that.options.treeView && this.data.length > 0) {
var rows = [];
var roots = $.grep(this.data, function (row, index) {
return row.Level == that.options.treeRootLevel;
});
$.each(roots, function (index, item) {
rows.push(item);
var child = getChild(item, that.data, that.options.treeId);
$.each(child, function (i, n) {
if (that.options.treeCollapseAll) {
n.hidden = true;
}
rows.push(n);
});
});
that.options.data = that.data = rows;
}
};
//重写bootstrapTable的initPagination方法
BootstrapTable.prototype.initPagination = function () {
//理论情况下，treegrid是不支持分页的，所以默认分页参数为false
this.options.pagination = false;
//调用“父类”的“虚方法”
_initPagination.apply(this, Array.prototype.slice.apply(arguments));
};
//重写bootstrapTable的initBody方法
BootstrapTable.prototype.initBody = function (fixedScroll) {
var that = this,
html = [],
data = this.getData();
this.trigger('pre-body', data);
this.$body = this.$el.find('tbody');
if (!this.$body.length) {
this.$body = $('').appendTo(this.$el);
}
if (!this.options.pagination || this.options.sidePagination === 'server') {
this.pageFrom = 1;
this.pageTo = data.length;
}
for (var i = this.pageFrom - 1; i < this.pageTo; i++) {
var key,
item = data[i],
style = {},
csses = [],
data_ = '',
attributes = {},
htmlAttributes = [];
if (item.hidden) continue;
style = calculateObjectValue(this.options, this.options.rowStyle, [item, i], style);
if (style && style.css) {
for (key in style.css) {
csses.push(key + ': ' + style.css[key]);
}
}
attributes = calculateObjectValue(this.options,
this.options.rowAttributes, [item, i], attributes);
if (attributes) {
for (key in attributes) {
htmlAttributes.push(sprintf('%s="%s"', key, escapeHTML(attributes[key])));
}
}
if (item._data && !$.isEmptyObject(item._data)) {
$.each(item._data, function (k, v) {
if (k === 'index') {
return;
}
data_ += sprintf(' data-%s="%s"', k, v);
});
}
html.push(''
);
if (this.options.cardView) {
html.push(sprintf('', this.header.fields.length));
}
if (!this.options.cardView && this.options.detailView) {
html.push(' ',
'',
sprintf('', this.options.iconsPrefix, this.options.icons.detailOpen),
'',
' ');
}
$.each(this.header.fields, function (j, field) {
var text = '',
value = getItemField(item, field),
type = '',
cellStyle = {},
id_ = '',
class_ = that.header.classes[j],
data_ = '',
rowspan_ = '',
title_ = '',
column = that.columns[getFieldIndex(that.columns, field)];
if (!column.visible) {
return;
}
style = sprintf('style="%s"', csses.concat(that.header.styles[j]).join('; '));
value = calculateObjectValue(column,
that.header.formatters[j], [value, item, i], value);
if (item['_' + field + '_id']) {
id_ = sprintf(' id="%s"', item['_' + field + '_id']);
}
if (item['_' + field + '_class']) {
class_ = sprintf(' class="%s"', item['_' + field + '_class']);
}
if (item['_' + field + '_rowspan']) {
rowspan_ = sprintf(' rowspan="%s"', item['_' + field + '_rowspan']);
}
if (item['_' + field + '_title']) {
title_ = sprintf(' title="%s"', item['_' + field + '_title']);
}
cellStyle = calculateObjectValue(that.header,
that.header.cellStyles[j], [value, item, i], cellStyle);
if (cellStyle.classes) {
class_ = sprintf(' class="%s"', cellStyle.classes);
}
if (cellStyle.css) {
var csses_ = [];
for (var key in cellStyle.css) {
csses_.push(key + ': ' + cellStyle.css[key]);
}
style = sprintf('style="%s"', csses_.concat(that.header.styles[j]).join('; '));
}
if (item['_' + field + '_data'] && !$.isEmptyObject(item['_' + field + '_data'])) {
$.each(item['_' + field + '_data'], function (k, v) {
if (k === 'index') {
return;
}
data_ += sprintf(' data-%s="%s"', k, v);
});
}
if (column.checkbox || column.radio) {
type = column.checkbox ? 'checkbox' : type;
type = column.radio ? 'radio' : type;
text = [that.options.cardView ?
'' : '',
' '
].join('');
item[that.header.stateField] = value === true || (value && value.checked);
} else {
value = typeof value === 'undefined' || value === null ?
that.options.undefinedText : value;
var indent, icon;
if (that.options.treeView && column.field == that.options.treeField) {
var indent = item.Level == that.options.Level ? '' : sprintf('', (item.Level - that.options.treeRootLevel) * 15);
var child = $.grep(data, function (d, i) {
return d.ParentId == item[that.options.treeId] && !d.hidden;
});
icon = sprintf('', child.length > 0 ? that.options.expandIcon : that.options.collapseIcon);
//icon = sprintf('', child.length > 0 ? that.options.expandIcon : "");
}
text = that.options.cardView ? ['',
that.options.showHeader ? sprintf('%s', style,
getPropertyFromOther(that.columns, 'field', 'title', field)) : '',
sprintf('%s', value),
''
].join('') : [sprintf('', id_, class_, style, data_, rowspan_, title_),
indent,
icon,
value,
''
].join('');
if (that.options.cardView && that.options.smartDisplay && value === '') {
text = '';
}
}
html.push(text);
});
if (this.options.cardView) {
html.push('');
}
html.push('');
}
if (!html.length) {
html.push('',
sprintf('%s ',
this.$header.find('th').length, this.options.formatNoMatches()),
' ');
}
this.$body.html(html.join(''));
if (!fixedScroll) {
this.scrollTo(0);
}
this.$body.find('> tr[data-index] > td').off('click dblclick').on('click dblclick', function (e) {
var $td = $(this),
$tr = $td.parent(),
item = that.data[$tr.data('index')],
index = $td[0].cellIndex,
field = that.header.fields[that.options.detailView && !that.options.cardView ? index - 1 : index],
column = that.columns[getFieldIndex(that.columns, field)],
value = getItemField(item, field);
if ($td.find('.detail-icon').length) {
return;
}
that.trigger(e.type === 'click' ? 'click-cell' : 'dbl-click-cell', field, value, item, $td);
that.trigger(e.type === 'click' ? 'click-row' : 'dbl-click-row', item, $tr);
if (e.type === 'click' && that.options.clickToSelect && column.clickToSelect) {
var $selectItem = $tr.find(sprintf('[name="%s"]', that.options.selectItemName));
if ($selectItem.length) {
$selectItem[0].click();
}
}
});
this.$body.find('> tr[data-index] > td > .detail-icon').off('click').on('click', function () {
debugger;
var $this = $(this),
$tr = $this.parent().parent(),
index = $tr.data('index'),
row = data[index];
if ($tr.next().is('tr.detail-view')) {
$this.find('i').attr('class', sprintf('%s %s', that.options.iconsPrefix, that.options.icons.detailOpen));
$tr.next().remove();
that.trigger('collapse-row', index, row);
} else {
$this.find('i').attr('class', sprintf('%s %s', that.options.iconsPrefix, that.options.icons.detailClose));
$tr.after(sprintf('%s
组件的使用如下：
1、首先引用这个js文件。
2、然后初始化组件
$('#tb').bootstrapTable({
url: ActionUrl + 'GetMenuList',
toolbar: '#toolbar',
sidePagination: 'client',
pagination: false,
treeView: true,
treeId: "Id",
treeField: "Name",
treeRootLevel: 1,
clickToSelect: true,//collapseIcon: "glyphicon glyphicon-triangle-right",//折叠样式
//expandIcon: "glyphicon glyphicon-triangle-bottom"//展开样式
})；
treeView:true表示启用树表格模式；
treeId:'Id'表示每一行tree的id；
treeField:'Name'表示要对那一列进行展开；
treeRootLevel:1表示树根的级别。
还有一个地方需要注意，要建立记录之间的父子级关系，必然后有一个ParentId的概念，所以在从后端返回的结果集里面，每条记录势必有一个ParentId的属性，如果是根节点，ParentId为null。比如我们后台得到的结果集的json格式如下：
[{Id: 1, Name: "系统设置", Url: null, ParentId: null, Level: 1, CreateTime: null, Status: 1, SortOrder: 1,…},
{Id: 2, Name: "菜单管理", Url: "/Systems/Menu/Index", ParentId: 1, Level: 2, CreateTime: null, Status: 1,…},
{Id: 3, Name: "订单管理", Url: null, ParentId: null, Level: 1, CreateTime: "2017-05-31 17:05:27",…},
{Id: 4, Name: "基础数据", Url: null, ParentId: null, Level: 1, CreateTime: "2017-05-31 17:05:55",…},
{Id: 5, Name: "新增订单", Url: "/order/add", ParentId: 3, Level: 2, CreateTime: "2017-05-31 17:07:03",…}]
三、组件需要完善的地方
上述封装给大家提供一个扩展bootstrapTable组件treeview功能，还有很多地方需要完善，比如：
1、我们的叶子节点前面的图标可以去掉；
2、增加展开所有、折叠所有的功能；
3、Level字段可以去掉，通过ParentId为null来确定根节点。
有兴趣的小伙伴可以自己试试。
四、总结
至此本文就结束了，这篇针对上篇做了一个补充，使得我们可以根据项目的需求自己选择用哪种方式，如果我们项目使用的是bootstrapTable作为数据展示的组件，可以考虑上述扩展；如果没有使用bootstrapTable，可以试试上篇的组件。