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Sharing experience in using Bootstrap tree control

小云云

Dec 26, 2017 pm 01:59 PM

bootstrap share experience

jquery tree control is a very lightweight control based on jquery+bootstrap, completely handwritten with js and styles. It has simple functions and good user experience. It is more practical for displaying some simple hierarchical relationships. Trees are used in many projects to show hierarchical relationships, and some trees are used to select items and then call the selected items elsewhere. Today, the editor of Script House brings you experience sharing on using Bootstrap tree control. Friends who need it can refer to it. I hope it can help everyone.

jquery tree control

Preface: Many times we need to use trees in projects. Some trees are just for displaying hierarchical relationships, some are for displaying and editing hierarchical relationships, and some trees are for displaying and editing hierarchical relationships. It is to select the item and then call the selected item elsewhere. No matter what, the tree control is one of the indispensable components in many projects. Today, the blogger plans to share here based on his own experience and some good tree controls found on the Internet, hoping to help everyone find the most suitable control. Still the same sentence: There is no best control, only the most suitable.

1. JQuery tree control

Jquery tree control is a very lightweight control based on JQuery+bootstrap, completely handwritten through js and styles. It can be found in many places on the Internet. See its shadow. It has simple functions and a good user experience. It is more practical to display some simple hierarchical relationships, but it is not easy to add, delete or modify nodes. If you have to do it, you may need to encapsulate it yourself.

1. First glimpse

Collapse all

Expand one level

Expand all

2. Code example

This control is also very simple to implement. You only need to reference jQuery and bootstrap components.

<link href="~/Content/Tree1/css/bootstrap.min.css" rel="external nofollow" rel="stylesheet" />
 <link href="~/Content/Tree1/css/style.css" rel="external nofollow" rel="stylesheet" />
 
 <script src="~/Scripts/jquery-1.10.2.js"></script>
 <script type="text/javascript">
　　$(function(){
 　　$('.tree li:has(ul)').addClass('parent_li').find(' > span').attr('title', 'Collapse this branch');
 　　$('.tree li.parent_li > span').on('click', function (e) {
 　　 var children = $(this).parent('li.parent_li').find(' > ul > li');
 　　if (children.is(":visible")) {
  　　children.hide('fast');
  　　$(this).attr('title', 'Expand this branch').find(' > i').addClass('icon-plus-sign').removeClass('icon-minus-sign');
 　　} else {
  　　children.show('fast');
  　　$(this).attr('title', 'Collapse this branch').find(' > i').addClass('icon-minus-sign').removeClass('icon-plus-sign');
 　　}
 　　e.stopPropagation();
 　　});
　　});
 </script>
<p class="tree well">
 <ul>
  <li>
  <span><i class="icon-folder-open"></i> 顶级节点1</span> <a href="">Goes somewhere</a>
  <ul>
   <li>
   <span><i class="icon-minus-sign"></i> 一级节点1</span> <a href=""></a>
   <ul>
    <li>
    <span><i class="icon-leaf"></i> 二级节点1_1</span> <a href=""></a>
    </li>
   </ul>
   </li>
   <li>
   <span><i class="icon-minus-sign"></i> 一级节点2</span> <a href=""></a>
   <ul>
    <li>
    <span><i class="icon-leaf"></i>二级节点2_1</span> <a href=""></a>
    </li>
    <li>
    <span><i class="icon-minus-sign"></i> 二级节点2_2</span> <a href=""></a>
    <ul>
     <li>
     <span><i class="icon-minus-sign"></i>三级节点2_1</span> <a href=""></a>
     <ul>
      <li>
      <span><i class="icon-leaf"></i>四级节点2_1</span> <a href=""></a>
      </li>
      <li>
      <span><i class="icon-leaf"></i> 四级节点2_2</span> <a href=""></a>
      </li>
     </ul>
     </li>
     <li>
     <span><i class="icon-leaf"></i>三级节点2_2</span> <a href=""></a>
     </li>
     <li>
     <span><i class="icon-leaf"></i> 三级节点2_3</span> <a href=""></a>
     </li>
    </ul>
    </li>
    <li>
    <span><i class="icon-leaf"></i>二级节点2_3</span> <a href=""></a>
    </li>
   </ul>
   </li>
  </ul>
  </li>
  <li>
  <span><i class="icon-folder-open"></i> 顶级节点2</span> <a href=""></a>
  <ul>
   <li>
   <span><i class="icon-leaf"></i> 一级节点2_1</span> <a href=""></a>
   </li>
  </ul>
  </li>
 </ul>
 </p>

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These codes are downloaded directly from the Internet. The icons on the nodes can be modified through the style, and the icon style is also based on bootstrap. If you need to add nodes dynamically, you can encapsulate the components yourself to create HTML, which should be relatively simple to implement. From the above, we can see that this component is lightweight. If you need to add, delete, modify or select nodes, don't worry, the following controls may be more suitable.

2. File tree editing plug-in Treed

This component was found on the Internet. After the initial demonstration, the members of the group agreed that the effect was great. Because it is displayed in a tree shape, it conveniently provides the addition, deletion and modification of nodes. The scaling effect of nodes is also better. Okay, let’s take a look. Demo and download address: http://www.jq22.com/jquery-info401

1. First sight of Treed

default expansion level

Click the "+" sign on the left and the node on the right to expand the child nodes

Multi-level expansion

On the left, you can edit the node name

Press Enter to wrap the line to add a sibling node, and delete the line wrap to delete the node.

Press the Enter key and then press the Tab key to add a new child node

It is very powerful. Reviewing the element shows that it is implemented using the svg tag of HTML5, so it has certain requirements for the browser.

3. Universal tree control - zTree

ztree is a traditional tree component, and its powerful functions determine its status in the tree control world. Whether it is tree display, editing, or node single and multi-selection, it provides a powerful functional API. However, because its interface is not very good-looking, many companies will hesitate when using it. Fortunately, since the flat style was introduced, ztree has also made certain beautifications. For example, its Metro style components are very similar to the bootstrap style. Today, let’s introduce some usage of this component in combination with Metro-style ztree. Demo and download address: http://www.jq22.com/jquery-info941

1. Component usage

This component can be added directly through Nuget.

2. Component effects

Collapse all nodes

Expand nodes

The node is selected. Of course, it can be turned into a single selection if necessary.

可以增删改节点

点击文本框出现树

3、代码示例

3.1 直接在界面显示文本框

需要引用的js和css文件

 <script src="~/Scripts/jquery-1.10.2.js"></script>
 <script src="~/Content/bootstrap/js/bootstrap.js"></script>
 <link href="~/Content/bootstrap/css/bootstrap.css" rel="external nofollow" rel="stylesheet" />
 <script src="~/Scripts/jquery.ztree.all-3.5.js"></script>
 <link href="~/Content/zTree.theme.metro.css" rel="external nofollow" rel="stylesheet" />

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页面html　

<p id="menuContent" class="menuContent" style="width:95%;border:1px solid rgb(170,170,170);z-index:10;">
  <ul id="treeDemo" class="ztree" style="margin-top:0; width:100%; height:auto;"></ul>
 </p>

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Js初始化

var setting = {
 view: {
 addHoverDom: addHoverDom,
 removeHoverDom: removeHoverDom,
 selectedMulti: false
 },
 check: {
 enable: true
 },
 data: {
 simpleData: {
  enable: true
 }
 },
 edit: {
 enable: false
 }
};
var zNodes = [
 { id: 1, pId: 0, name: "父节点1", open: true },
 { id: 11, pId: 1, name: "父节点11" },
 { id: 111, pId: 11, name: "叶子节点111" },
 { id: 112, pId: 11, name: "叶子节点112" },
 { id: 113, pId: 11, name: "叶子节点113" },
 { id: 114, pId: 11, name: "叶子节点114" },
 { id: 12, pId: 1, name: "父节点12" },
 { id: 121, pId: 12, name: "叶子节点121" },
 { id: 122, pId: 12, name: "叶子节点122" },
 { id: 123, pId: 12, name: "叶子节点123" },
 { id: 124, pId: 12, name: "叶子节点124" },
 { id: 13, pId: 1, name: "父节点13", isParent: true },
 { id: 2, pId: 0, name: "父节点2" },
 { id: 21, pId: 2, name: "父节点21", open: true },
 { id: 211, pId: 21, name: "叶子节点211" },
 { id: 212, pId: 21, name: "叶子节点212" },
 { id: 213, pId: 21, name: "叶子节点213" },
 { id: 214, pId: 21, name: "叶子节点214" },
 { id: 22, pId: 2, name: "父节点22" },
 { id: 221, pId: 22, name: "叶子节点221" },
 { id: 222, pId: 22, name: "叶子节点222" },
 { id: 223, pId: 22, name: "叶子节点223" },
 { id: 224, pId: 22, name: "叶子节点224" },
 { id: 23, pId: 2, name: "父节点23" },
 { id: 231, pId: 23, name: "叶子节点231" },
 { id: 232, pId: 23, name: "叶子节点232" },
 { id: 233, pId: 23, name: "叶子节点233" },
 { id: 234, pId: 23, name: "叶子节点234" },
 { id: 3, pId: 0, name: "父节点3", isParent: true }
];
$(document).ready(function () {
 $.fn.zTree.init($("#treeDemo"), setting, zNodes);
});
function addHoverDom(treeId, treeNode) {
 var sObj = $("#" + treeNode.tId + "_span");
 if (treeNode.editNameFlag || $("#addBtn_" + treeNode.tId).length > 0) return;
 var addStr = "<span class=&#39;button add&#39; id=&#39;addBtn_" + treeNode.tId
 + "&#39; title=&#39;add node&#39; onfocus=&#39;this.blur();&#39;></span>";
 sObj.after(addStr);
 var btn = $("#addBtn_" + treeNode.tId);
 if (btn) btn.bind("click", function () {
 var zTree = $.fn.zTree.getZTreeObj("treeDemo");
 zTree.addNodes(treeNode, { id: (100 + newCount), pId: treeNode.id, name: "new node" + (newCount++) });
 return false;
 });
};
function removeHoverDom(treeId, treeNode) {
 $("#addBtn_" + treeNode.tId).unbind().remove();
};

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3.2 默认隐藏，触发某个事件的时候出现树。这种场景在项目里面非常常见，一般用于选择树节点。所以博主把这个也单独拿出来说下吧。

p默认是隐藏的。

　　　　<input type="text" class="form-control" id="txt_ztree" placeholder="点击文本框出现ztree" onclick="showMenu()" />
  <p id="menuContent2" class="menuContent" style="display:none;position: absolute;width:95%;border:1px solid rgb(170,170,170);z-index:10;">
  <ul id="treeDemo2" class="ztree" style="margin-top:0; width:160px; height:auto;"></ul>
  </p>

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在js里面初始化树以及注册showMenu()方法

var setting2 = {
 check: {
 enable: true,
 chkStyle: "radio",
 radioType: "all"
 },
 view: {
 dblClickExpand: false
 },
 data: {
 simpleData: {
  enable: true
 }
 },
 callback: {
 onClick: onClickNode,
 onCheck: onCheck
 }
};
var zNodes = [
 { id: 1, pId: 0, name: "父节点1", open: true },
 { id: 11, pId: 1, name: "父节点11" },
 { id: 111, pId: 11, name: "叶子节点111" },
 { id: 112, pId: 11, name: "叶子节点112" },
 { id: 113, pId: 11, name: "叶子节点113" },
 { id: 114, pId: 11, name: "叶子节点114" },
 { id: 12, pId: 1, name: "父节点12" },
 { id: 121, pId: 12, name: "叶子节点121" },
 { id: 122, pId: 12, name: "叶子节点122" },
 { id: 123, pId: 12, name: "叶子节点123" },
 { id: 124, pId: 12, name: "叶子节点124" },
 { id: 13, pId: 1, name: "父节点13", isParent: true },
 { id: 2, pId: 0, name: "父节点2" },
 { id: 21, pId: 2, name: "父节点21", open: true },
 { id: 211, pId: 21, name: "叶子节点211" },
 { id: 212, pId: 21, name: "叶子节点212" },
 { id: 213, pId: 21, name: "叶子节点213" },
 { id: 214, pId: 21, name: "叶子节点214" },
 { id: 22, pId: 2, name: "父节点22" },
 { id: 221, pId: 22, name: "叶子节点221" },
 { id: 222, pId: 22, name: "叶子节点222" },
 { id: 223, pId: 22, name: "叶子节点223" },
 { id: 224, pId: 22, name: "叶子节点224" },
 { id: 23, pId: 2, name: "父节点23" },
 { id: 231, pId: 23, name: "叶子节点231" },
 { id: 232, pId: 23, name: "叶子节点232" },
 { id: 233, pId: 23, name: "叶子节点233" },
 { id: 234, pId: 23, name: "叶子节点234" },
 { id: 3, pId: 0, name: "父节点3", isParent: true }
];
//初始化
$(document).ready(function () {
 $.fn.zTree.init($("#treeDemo2"), setting2, zNodes);
});
//显示菜单
function showMenu() {
 $("#menuContent2").css({ left: "15px", top: "34px" }).slideDown("fast");
 $("body").bind("mousedown", onBodyDown);
}
//隐藏菜单
function hideMenu() {
 $("#menuContent2").fadeOut("fast");
 $("body").unbind("mousedown", onBodyDown);
}
function onBodyDown(event) {
 if (!(event.target.id == "menuBtn" || event.target.id == "menuContent2" || event.target.id == "txt_ztree" || $(event.target).parents("#menuContent2").length > 0)) {
 hideMenu();
 }
}
//节点点击事件
function onClickNode(e, treeId, treeNode) {
 var zTree = $.fn.zTree.getZTreeObj("treeDemo");
 zTree.checkNode(treeNode, !treeNode.checked, null, true);
 return false;
}
//节点选择事件
function onCheck(e, treeId, treeNode) {
 var zTree = $.fn.zTree.getZTreeObj("treeDemo"),
 nodes = zTree.getCheckedNodes(true),
 v = "";
 var parentid = "";
 var parentlevel = "";
 for (var i = 0, l = nodes.length; i < l; i++) {
 v += nodes[i].name + ",";
 parentid += nodes[i].id + ",";
 parentlevel += nodes[i].menu_level + ",";
 }
 if (v.length > 0) {
 v = v.substring(0, v.length - 1);
 parentid = parentid.substring(0, parentid.length - 1);
 parentlevel = parentlevel.substring(0, parentlevel.length - 1);
 }
 else {
 return;
 }
 hideMenu();
}

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由于以上都是静态数据，如果需要从后台取数据动态加载树节点，可以去后台构造zNodes这种结构的数组即可。

四、总结

以上三种树形组件，各有千秋，可以根据需求选用不同的组件。

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